Installation and Service
instructions
DHP-H Opti Pro, DHP-H,
DHP-C, DHP-L, DHP‑A,
DHP-AL
VMBMA502
If these instructions are not followed during
installation, operation and maintenance,
Danfoss AS’s liability according to the applicable
warranty is not binding.
© 2008 Copyright Danfoss AS.
Danfoss AS retains the right to make changes to
components and specifications without prior notice.
2
VMBMA502
Contents
Installation instructions.................... 4
Service instructions........................... 40
1 Important information/Safety regulations . . . . . . . . . . . . . . . . . . . 4
12 The heat pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
1.1
1.2
1.3
1.4
Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control and safety devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
4
4
5
12.1
12.2
12.3
12.4
12.5
12.6
12.7
12.8
12.9
12.10
12.11
2 Heat pump information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10
2.11
2.12
2.13
Function description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Outdoor unit and defroster function, DHP-A, -AL models . . . . . . . . . . 41
Passive cooling function, DHP-C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Speed control, Opti models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
HGW technology, DHP-H Opti Pro . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Auxiliary heating, DHP-H, -L, -C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Auxiliary heating DHP-A, -AL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Water heater, DHP-H, -C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Water heater, DHP-A, -AL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Important parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
DHP-H . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
DHP-H Opti Pro . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
DHP-C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
DHP-L, DHP-L Opti . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
DHP-A, DHP-A Opti . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
DHP-AL, DHP-AL Opti . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Package contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Heat pump control panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Transporting the heat pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Space requirement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Recommended location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Space requirement, outdoor unit, DHP-A, -AL . . . . . . . . . . . . . . . . . . . . . 20
Recommended location of outdoor unit, DHP‑A, -AL . . . . . . . . . . . . . . 20
13 Control computer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
3 Drilling holes for brine pipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
15 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
13.1 Function description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
13.2 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
14 Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
14.1 Main menu INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
14.2 Main menu SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
15.1
15.2
15.3
15.4
4 Separating the heat pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5 Unpacking and installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
5.1
5.2
5.3
Setting up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Removing the front cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Unpacking and installing the outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . 22
6 Piping installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
Alarm list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Measurement points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Check points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Operational problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
16 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
VL system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
D system, DHP-L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
VLD system, DHP-A, -AL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Safety valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Connecting cold and hot water pipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Connecting the heating system supply and return lines . . . . . . . . . . . 27
Filling the water heater and heating system . . . . . . . . . . . . . . . . . . . . . . 28
Bleeding the heating system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7 Electrical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.1
7.2
7.3
7.4
7.5
7.6
7.7
Connect power supply, 400V 3N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Connect power supply, 230V 1N SP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Position and connect outdoor sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Changing the language in the control computer . . . . . . . . . . . . . . . . . . 29
Resetting to system D or VLD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Changing the number of auxiliary heating power stages . . . . . . . . . . 30
Connect outdoor unit, DHP-A, -AL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8 Brine installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.1
8.2
8.3
8.4
8.5
8.6
8.7
8.8
8.9
Heat sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Information collector pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Connection to outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Connection of several brine coils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Connection diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Installing brine pipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Filling the brine system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Bleeding the brine circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Vent outdoor unit, DHP-A, -AL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
9 Installing accessories/additional functions . . . . . . . . . . . . . . . . . 36
9.1
9.2
9.3
9.4
9.5
Room temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
EVU function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Tariff control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Flow switch/level switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Higher hot water temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
10 Start up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
10.1
10.2
10.3
10.4
10.5
Installation checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Manual test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Installing the front cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
After start up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
11 Customer information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
VMBMA502
3
Installation instructions
1
Important information/Safety
regulations
The heat pump must be installed by authorised installation
⚠⚠engineers
and the installation must follow the applicable
local rules and regulations as well as these installation
instructions.
This apparatus is not intended for persons (including chil⚠⚠dren)
with reduced physical, sensory or psychological capacity, or who do not have knowledge or experience, unless
supervised or they have received instructions on how the
apparatus functions from a safety qualified person.
In normal use and normal conditions the refrigerant has low toxicity. However, although the toxicity of the refrigerant is low, it can
cause injury (or be highly dangerous) in abnormal circumstances
or where deliberately abused. Refrigerant vapour is heavier than air
and, in enclosed spaces below the level of a door for example, and
in the event of leakage, concentrations can arise with a resultant
risk of suffocation due to a lack of oxygen. Spaces in which heavy
vapour can collect below the level of the air must therefore be well
ventilated.
Refrigerant exposed to a naked flame creates a poisonous irritating
gas. This gas can be detected by its odour even at concentrations
below its permitted levels. Evacuate the area until it has been sufficiently ventilated.
Anyone with symptoms of poisoning from the vapour must immediately move or be moved into the fresh air.
Work on the refrigerant circuit
⚠⚠Children are not permitted to play with the apparatus.
⚠⚠The heat pump must be located in a frost-free environment!
⚠⚠The heat pump must be placed in an area with a floor drain.
The heat pump must be located on a stable base. The base
⚠⚠must
be able to support the gross weight of the heat pump
When repairing the refrigerant circuit, the refrigerant must not be
released from the heat pump – it must be destroyed at a special
plant. Draining and refilling must only be carried out using new
refrigerant (for the amount of refrigerant see manufacturer’s plate)
through the service valves. All warranties from Danfoss AS are void
if, when filling with refrigerant other than Danfoss recommended
refrigerant, it has not been notified in writing that the new refrigerant is an approved replacement refrigerant together with other
remedies.
NOTE! To prevent leaks ensure that there are no stresses in the
connecting pipes!
NOTE! It is important that the heating system is completely
bled after installation.
NOTE! Bleed valves must be installed where necessary.
• Installation must be carried out in accordance with applicable
local rules and regulations. The hot water tank must be equipped
with an approved safety valve (supplied).
• Radiator systems with a closed expansion tank must also be
equipped with an approved pressure gauge and safety valve,
minimum DN 20, for a maximum 1.5 bar opening pressure, or
according to country specific requirements.
• Cold and hot water pipes and overflow pipes from safety valves
must be made of heat resistant and corrosion-resistant material,
e.g. copper. The safety valve overflow pipes must have an open
connection to the drain and visibly flow into this in a frost-free
environment.
• The connecting pipe between the expansion tank and the safety
valve must slope continuously upwards. A continuous upwards
slope means that the pipe must not slope downwards from the
horizontal at any point.
• If there is any risk of groundwater infiltration at brine pipe leadins, watertight grommets must be used, for more information see
section “Drilling holes for brine pipes”.
• In addition to applicable local rules and regulations the installation should be carried out in a manner that prevents vibrations
from the heat pump being transmitted into the house causing
noise.
Scrapping
when filled. (see section 2.10 Recommended location)
1.1
When the heat pump is to be scrapped the refrigerant must be
extracted for destruction. Local rules and regulations related to the
disposal of refrigerant must be followed.
1.2
current! The terminal blocks are live and can be
⚠⚠highly
Electrical
dangerous due to the risk of electric shock. The power
supply must be isolated before electrical installation is started. The heat pump is connected internally at the factory, for
this reason electrical installation consists mainly of the connection of the power supply.
The room temperature sensor is connected to a
⚠⚠safety
NOTE! extra-low
voltage.
Follow the separate installation instructions for the room temperature sensor!
1.3
Commissioning
may only be commissioned if the heating
⚠⚠system,
The installation
water heater and brine system have been filled and
Refrigerant
bled. Otherwise the circulation pumps can be damaged.
Work on the refrigerant circuit must only be carried out
⚠⚠by
a certified engineer!
is only to be run on auxiliary heating, first
⚠⚠ensure
If the installation
that the heating system is filled and that neither the
Although the heat pump cooling system (refrigerant circuit) is filled
with a chlorine-free and environmentally-approved refrigerant that
will not affect the ozone layer, work on this system may only be carried out by authorized persons.
Fire risk
The refrigerant is not combustible or explosive in normal conditions.
Toxicity
4
Electrical connection
Electrical installation may only be carried out by an authorized electrician and must follow applicable local and national regulations.
installation must be carried out using perma⚠⚠nently
The electrical
routed cables. It must be possible to isolate the power
supply using an all-pole circuit breaker with a minimum
contact gap of 3 mm. (The maximum load for externally connected units is 2A).
VMBMA502
brine pump nor the compressor can be started. This is carried
out by setting the operating mode to ADD.HEAT.
1.4
Control and safety devices
To ensure a correct function of the heat pump there are a number
of control and safety devices.
The figure below shows the heat pump’s three liquid circuits with
respective safety function.
nection to the drain and visibly flow into this in a frost-free environment.
Compressor
The compressor is equipped with a thermal overload relay which
protects the compressor from over current.
Heat transfer circuit
1
1
2
3
4
Refrigerant circuit
Figure 2: The thermal overload relay on the electrical panel.
5
Position
1
6
Brine circuit
Figure 1: Control and safety devices.
Position
1
2
3
4
5
6
Name
Safety valve, heat transfer circuit
Pressure switch, operation, 2,65 MPa
Pressure switch, operation, 2,85 MPa
Pressure switch, high pressure, 3,10 MPa
Pressure switch, low pressure, 0,08 Mpa
Safety valve, brine circuit
Heat transfer circuit
If the pressure in this circuit exceeds the opening pressure of the
safety valve (1), the valve opens to release the overflow and then
shuts again. The safety valve overflow pipe must have an open connection to the drain and visibly flow into this in a frost-free environment.
Refrigerant circuit
The refrigerant circuit’s high pressure side is equipped with a high
pressure switch (4) and two operational pressure switches (2,3)
(only one is connected). The connected operational pressure switch
stops the compressor when the switching point is reached, that is,
when sufficient amount of heat is produced.
If the operational pressure switch should fail and the pressure
continue to rise, the compressor is stopped by the high pressure
switch when its switching point is reached. The operation of the
heat pump is blocked. When the problem with the abnormally high
pressure is solved, the pressure switch is automatically reset.
If the high pressure switch is tripped the alarm indicator on the
front panel is flashing and an alarm text is displayed. Restart the
heat pump by first setting the operational mode to OFF and then
back to previous mode (AUTO/HEATPUMP/ADD.HEAT/HOT WATER).
The low pressure switch (5) stops the compressor if the pressure is
too low on the low pressure side. The operation of the heat pump
is blocked. When the problem with the abnormally low pressure is
solved, the pressure switch is automatically reset.
If the low pressure switch is tripped the alarm indicator on the front
panel is flashing and an alarm text is displayed. Restart the heat
pump by first setting the operational mode to OFF and then back
to previous mode (AUTO/HEATPUMP/ADD.HEAT/HOT WATER).
Brine circuit
If the pressure in this circuit exceeds the opening pressure of the
safety valve (6), the valve opens to release the overflow and then
shuts again. The safety valve overflow pipe must have an open con-
Name
Thermal overload relay (F11)
If the thermal overload relay is tripped the alarm indicator on the
front panel is flashing and an alarm text is displayed.
The thermal overload relay must cool down and it is automatically
reset. The alarm is acknowledged by setting the operational mode
to OFF and then back to previous mode (AUTO/HEATPUMP/ADD.
HEAT/HOT WATER).
The compressor is also equipped with an internal protection which
stops the compressor’s operation if it risks being overheated. The
internal protection cannot be reset manually, the compressor must
cool down before it can start operation.
Circulation pumps
A circulation pump has an internal overload protection. It is reset
automatically when the pump has cooled down.
However, a pump in a 10 to 16kW heat pump (air 8-12kW) has an
internal overload relay that trips the motor protection alarm. The
indication and reset are the same as for the compressor.
Auxiliary heat
The auxiliary heater is made up of an electric heating element on
the supply line. It is equipped with a temperature guard which
stops the heating element’s operation if it risks being overheated.
The temperature guard is placed on the electrical panel.
1
2
Figure 3: The temperature guard on the electrical panel.
Position
1
2
Name
Temperature guard
Reset button
If the temperature guard is tripped the alarm indicator on the front
panel is flashing and an alarm text is displayed.
The temperature guard is reset by pushing the reset button (2).
temperature guard must be reset by authorised person⚠⚠nel
Theonly.
Specifications
Please see the technical data tables at the end of this manual for
detailed specifications.
VMBMA502
5
2
Heat pump information
2.1
DHP-H
Dimensions and connections
1845 (±10)
The brine pipes can be connected on either the left or right-hand
sides of the heat pump.
110
440
300
2
528
1
40±10
455
596
610
4
6
7 8
9
80
3
10
5
Figure 4: DHP-H and connections.
Position
1
2
3
4
5
6
7
8
9
10
6
Name
Brine in, 28 Cu
Brine out, 28 Cu
Heating system supply line, 22 Cu: 4-10 kW, 28 Cu: 12-16 kW
Heating system return line, 22 Cu: 4-10 kW, 28 Cu: 12-16 kW
Expansion line, 22 Cu
Lifting point
Hot water line, 22 Cu or stainless steel
Cold water line, 22 Cu or stainless steel
Lead-in for supply, sensor and communication cables
Safety valve for temperature and pressure (only applies to certain markets)
VMBMA502
Components
4
14
15
5
6
1
16
7
8
19
9
2
10
3
18
8
11
17
13
21
20
12
Left view
Front view
Right view
Figure 5: DHP-H, components.
Position
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Name
Water heater, 180 litres
Return line sensor, heating system
Evaporator, insulated
Exchange valve
Supply line sensor
Heating system circulation pump
Auxiliary heating, immersion heater
Brine in
Heating system supply line
Brine out
Brine pump brine system
Drying filter
Expansion valve
Hot water temperature sensor (displays maximum temperature)
Control panel for control equipment
Electrical panel
Compressor
Low pressure pressostat
Operating pressostats
High pressure pressostat
Condenser with primary side drain
VMBMA502
7
2.2
DHP-H Opti Pro
Dimensions and connections
1845 (±10)
The brine pipes can be connected on either the left or right-hand
sides of the heat pump.
110
440
300
2
528
1
40±10
455
596
610
4
6
7 8
9
80
3
10
5
Figure 6: DHP-H, DHP-H Opti Pro and connections.
Position
1
2
3
4
5
6
7
8
9
10
8
Name
Brine in, 28 Cu
Brine out, 28 Cu
Heating system supply line, 22 Cu: 4-10 kW, 28 Cu: 12-16 kW
Heating system return line, 22 Cu: 4-10 kW, 28 Cu: 12-16 kW
Expansion line, 22 Cu
Lifting point
Hot water line, 22 Cu or stainless steel
Cold water line, 22 Cu or stainless steel
Lead-in for supply, sensor and communication cables
Safety valve for temperature and pressure (only applies to certain markets)
VMBMA502
Components
4
14
5
15
6
1
16
7
19
9
2
3
8
22
18
10
11
17
21
20
23
12
13
Left view
Front view
Right view
Figure 7: DHP-H Opti Pro, components.
Position
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
Name
Water heater, 180 litres
Return line sensor, heating system
Evaporator, insulated
HGW shunt valve
Supply line sensor
Heating system circulation pump
Auxiliary heating, immersion heater
Brine in
Heating system supply line
Brine out
Brine pump brine system
Drying filter
Expansion valve
Hot water temperature sensor (displays maximum temperature)
Control panel for control equipment
Electrical panel
Compressor
Low pressure pressostat
Operating pressostats
High pressure pressostat
Condenser with primary side drain
Hot gas heat exchanger
HGW sensor
VMBMA502
9
2.3
DHP-C
Dimensions and connections
1845 (±10)
The brine pipes can be connected on either the left or right-hand
sides of the heat pump.
110
440
300
1
528
2
40±10
455
596
610
4
6
7 8
5
9
80
3
Figure 8: DHP-C, Dimensions and connections.
Position
1
2
3
4
5
6
7
8
9
10
Name
Brine in, 28 Cu
Brine out, 28 Cu
Supply line heating system, 22 Cu
Return line heating system, 22 Cu
Expansion line, 22 Cu
Lifting point
Hot water line, 22 Cu or stainless steel
Cold water line, 22 Cu or stainless steel
Lead-in for supply, sensor and communication cables
VMBMA502
Components
7
17
18
8
1
9
19
10
11
2
5
3
22
12
13
6
4
21
14
20
15
23
24
16
Left view
Front view
Right view
Figure 9: DHP-C, components.
Position
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Name
Water heater, 180 litres
Return line sensor, heating system
Evaporator, insulated
HGW shunt valve
Exchange valve cooling
Shunt cooling
Exchange valve, heating/hot water
Supply line sensor
Heating system circulation pump
Auxiliary heating, immersion heater
Brine in
Heating system supply line
Brine out
Brine pump brine system
Expansion valve
Drying filter
Hot water temperature sensor (displays maximum temperature)
Control panel for control equipment
Electrical panel
Compressor
Low pressure pressostat
Operating pressostats
HGW sensor
Condenser with primary side drain
VMBMA502
11
2.4
DHP-L, DHP-L Opti
Dimensions and connections
The brine pipes can be connected on either the left or right-hand
sides of the heat pump.
110
1538 (±10)
440
300
2
528
1
40±10
455
596
690
5
610
4
3
7
80
6
Figure 10: DHP-L, DHP-L Opti, Dimensions and connections.
Position
1
2
3
4
5
6
7
12
Name
Brine in, 28 Cu
Brine out, 28 Cu
Heating system supply line, 22 Cu: 4-10 kW, 28 Cu: 12-16 kW
Heating system return line, 22 Cu: 4-10 kW, 28 Cu: 12-16 kW
Alternative for brine out
Alternative for brine in
Lead-in for supply, sensor and communication cables
VMBMA502
Components
1
11
2
13
5
16
6
3
4
12
8
7
10
15
14
18
17
9
Left view
Front view
Right view
Figure 11: DHP-L, DHP-L Opti components.
Position
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Name
Auxiliary heater, immersion heater on supply line
Return line, heating system
Exchange valve
Evaporator, insulated
Heating system circulation pump
Supply line sensor, heating system
Brine out
Brine pump brine system
Drying filter
Expansion valve
Control panel for control equipment
Brine in
Electrical panel
Compressor
Low pressure pressostat
Operating pressostats
High pressure pressostat
Condenser with primary side drain
VMBMA502
13
2.5
DHP-A, DHP-A Opti
2
Dimensions and connections
The brine pipes can be connected on either the left or right-hand
sides of the heat pump.
1175
405
2
441
1205
342
630
1
1
300
910
Figure 13: Outdoor unit, Dimensions and connections.
1845 (±10)
Position Name
1
Brine in (from HP Brine out) 28 Cu
2
Brine out (to HP Brine in) 28 Cu
2
6
3
1
300
528
258
5
2
250
4
7
1
8
Figure 14: Outdoor unit components and connections
40±10
455
596
5
Position
1
2
3
4
5
6
7
8
9
7 8
11
6
610
10
Check that the delivery of the outdoor unit contains the following:
• Outdoor unit
• Disassembled stand
• Necessary screws, nuts and washers.
• Defroster sensor
3
80
4
Figure 12: DHP-A, DHP-A Opti, Dimensions and connections.
Position
1
2
3
4
5
6
7
8
9
10
11
14
Name
Outdoor unit
Cover
Front cover
Stand
Cover
Connection, brine in
Connection, brine out
Connection, drain drip tray
Name
Lead-in for incoming power supply, sensors and
communication cable
Brine in, 28 Cu
Brine out, 28 Cu
Heating system supply line, 22 Cu: 6-10 kW, 28 Cu: 12 kW
Heating system return line, 22 Cu: 6-10 kW, 28 Cu: 12 kW
Expansion pipe, 22 Cu
Hot water pipe, 22 Cu or stainless steel
Cold water pipe, 22 Cu or stainless steel
Lifting point
Expansion outlet brine circuit, DN25 int.
Safety valve for temperature and pressure (only applies to certain markets)
VMBMA502
Components
14
5
2
15
6
1
7
16
8
17
13
3
24
4
9
19
11
21
22
10
20
18
23
12
Left view
Front view
Right view
Figure 15: DHP-A, DHP-A Opti, components.
Position
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Name
Water heater, 180 litres
Defrosting tank
Evaporator, insulated
Shunt valve, defrosting
Exchange valve, heating system
Supply line sensor
Heating system circulation pump
Auxiliary heating, immersion heater
Brine pump brine system
Brine in
Drying filter
Expansion valve
Brine out to outdoor unit
Hot water temperature sensor (displays maximum temperature)
Control panel for control equipment
Electrical panel
Heating system supply line
Compressor
Low pressure pressostat
Operating pressostats
High pressure pressostat
Condenser with primary side drain
Return line sensor, heating system
Brine in to defrosting tank during defrosting
VMBMA502
15
2.6
DHP-AL, DHP-AL Opti
Dimensions and connections
The brine lines can be connected on either the left or right-hand
sides of the heat pump.
Water heater
1538 (±10)
Heat pump
2
17
596
6
16
14
15
18
7
5
13
12
10
11
1
4
3
9
8
40±10
40±10
455
690
455
690
2
Figure 16: DHP-AL, DHP-AL Opti dimensions and connections.
1205
342
630
1
405
2
441
Position Name
1
Brine in, 28 Cu
2
Brine out, during normal operation, 28 Cu
3
Brine out, during defrosting to hwh pos 8, 28 Cu
4
Return pipe from water heater pos 9, 28 Cu
5
Heating system supply line, 22 Cu: 6-10 kW, 28 Cu: 12 kW
6
Heating system return line, 22 Cu: 6-10 kW, 28 Cu: 12 kW
7
Lead-in power and sensor lead
Water heater
8
Connection for brine out when defrosting from pos 3
9
Water heater, return pipe to pos 4
10
Bleed valve, at stainless steel water heater
11
Brine out during defrosting, 28 Cu
12
Domestic hot water, 22 Cu
13
Cold water
14
Supply to water heater coil
15
Brine, expansion outlet when outdoor unit is positioned
at high level
16
Lead-in sensor lead
17
Lifting point
18
Safety valve for temperature and pressure (only applies to certain markets)
1
1175
300
910
Figure 17: Outdoor unit, dimensions and connections.
Position Name
1
Brine in, 28 Cu
2
Brine out, 28 Cu
2
6
3
1
5
4
7
8
Figure 18: Outdoor unit components and connections.
Position
1
2
3
4
5
6
7
8
Name
Outdoor unit
Cover
Front cover
Stand
Cover
Connection, brine in
Connection, brine out
Connection, drain drip tray
Check that the delivery of the outdoor unit contains the following:
• Outdoor unit
• Disassembled stand
• Necessary screws, nuts and washers.
• Defrost sensor
16
VMBMA502
Components
1
2
3
4
5
13
6
7
9
17
8
16
10
14
18
15
11
12
Left view
Front view
Right view
Figure 19: DHP-AL, DHP-AL Opti components.
Position
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
4
Name
Heating system supply line
Brine out to outdoor unit
Return line, heating system
Auxiliary heating, immersion heater
Electrical panel
Heating system circulation pump
Evaporator
Circulation pump coolant system
Exchange valve, heating system
Drying filter
Expansion valve
Shunt valve defrosting
Brine in to defrosting tank during defrosting
Condenser
Compressor
Low pressure pressostat
Operating pressostats
High pressure pressostat
5
6
7
8
9
1
2
3
10
11
Figure 20: Water heater components and connections.
Position
1
2
3
4
5
6
7
8
9
10
11
VMBMA502
Name
Defrosting tank
Water heater
TWS coil
Connection, brine out during defrosting
Bleed valve, at stainless steel water heater
Domestic hot water
Cold water
Connection, to TWS coil
Connection, expansion line when outdoor unit is positioned
at high level
Connection, brine from heat pump
Connection, return line to heat pump
17
2.7
Package contents
Sizes 12kW - 16kW:
Delivery check
1. Check that there is no transport damage. The heat pump is
packaged in cardboard.
2. Remove the plastic wrapping and check that the delivery contains the following components.
Sizes 4kW - 10kW:
Part no.
Quantity
Name
086U2369
1
Safety valve
9 bar 1/2"
086U2701
1
Outdoor sensor
Kimsafe 200 035
Part no.
Quantity
Name
086U2369
1
Safety valve
9 bar 1/2"
086U0896
1
Safety valve
1,5 bar 1/2"
086U2701
1
Outdoor sensor
Kimsafe 200 035
086U2824
1
Expansion and bleed tank without
valve
086U0896
1
Safety valve
1,5 bar 1/2"
086U0026
5
Rubber collar hole 22-32mm
086U2824
1
Expansion and bleed tank without
valve
086U6034
2
Flex. hose DN25 L=550
086U6007
1
Filling device brine DN32
086U6005
1
Dirt filter with shut-off DN25
086U0026
5
Rubber collar hole 22-32mm
086U6033
2
Flex. hose DN20 L=550
086U6006
1
Filling device brine DN25
086U6005
1
Dirt filter with shut-off DN25
18
VMBMA502
2.8
Heat pump control panel
2.10 Space requirement
The heat pump control panel consists of a display, four control buttons and an indicator.
ROOM
20°C
(20°C)
NO
DEMAND HEAT
OPERAT. AUTO
The symbols in the display are
only examples. Certain symbols cannot be displayed at
the same time.
To facilitate the installation and subsequent testing and maintenance it is recommended that there is sufficient free space around
the heat pump in accordance with the following dimensions:
– 300 mm on each side
– 300 mm above
– 600 mm in front
– 10 mm behind
Figure 21: Display, control buttons and indicator for the heat pump.
2.9
Transporting the heat pump
The heat pump must always be transported and stored upright.
Secure the heat pump so that it cannot tip over during transportation.
When transporting indoors to the installation location it may be
necessary to place the heat pump on its back. The time that the
heat pump is transported on its back should be as short as possible.
After the heat pump has been lifted up again it must stand upright
for at least an hour before commissioning.
DHP-H
DHP-C
DHP-A
DHP-A Opti
DHP-A Opti Pro
1620
Figure 22: Necessary service space.
1905
The control computer is controlled using a user-friendly menu system, displayed in the display.
Use the four control buttons to navigate the menus and increase or
reduce the set values:
• An up button with a plus sign
• A down button with a minus sign
• A right button with a right arrow
• A left button with a left arrow
The main menu, INFORMATION, is opened by pressing the left or
right buttons. From INFORMATION one of the four sub-menus can
be opened: OPERAT.; HEATCURVE; TEMPERATURE and OPERAT. TIME.
For installation or service, the hidden menu, SERVICE, is used. This
is opened by holding the left button depressed for five seconds.
From the SERVICE menu one of the following sub-menus can be
opened: WARMWATER; HEATPUMP; ADD.HEAT; MANUAL TEST and
INSTALLATION.
For further information about the menus see the service instructions.
The indicator at the bottom of the control panel has two modes:
• Lit steadily, the installation has power and is ready to produce
heat or hot water
• Flashing, means an active alarm
DHP-L
DHP-AL
DHP-L Opti
DHP-AL Opti
Figure 23: Minimum headroom for heat pump installation.
2.11 Recommended location
avoid condensation problems for the brine pipes, as short
⚠⚠aTobrine
pipe as possible is recommended.
The heat pump should be located on a stable floor, preferably
made of concrete. When locating the heat pump on a wooden floor
this should be reinforced to take the weight. One solution is to
place a thick metal plate, at least 6mm, under the heat pump. The
metal plate should cover several joists spreading the weight of the
heat pump over a larger area. If the heat pump is being installed
in a newly-built house, this has normally been taken into account
during construction, and the joists where the heat pump will be
located have been reinforced. Always check that this has been carried out when installing into a newly-built house. Avoid positioning
the heat pump in a corner as the surrounding walls may amplify its
noise. It is also important to adjust the heat pump using the adjustable feet so that it is horizontal to the base.
VMBMA502
19
2.12 Space requirement, outdoor unit, DHPA, -AL
• To ensure the function of the outdoor unit, there must be at least
300 mm of space behind and 1500 mm at the front.
• For maintenance work there must be approximately 300 mm of
space at the sides of the outdoor unit.
Drilling holes for brine pipes
that the holes for the insert pipes are posi⚠⚠tioned
NOTE! Ensure
so that there is room for the other installations.
⚠⚠NOTE! The brine pipes shall have separate lead-ins.
If the wall lead-ins are below the highest ground water level
⚠⚠watertight
lead-ins must be used.
The brine pipes must be insulated from the heat pump, through
the walls and outside the house all the way to the collector so as to
avoid condensation and prevent heat loss.
If the brine pipes are to be routed above ground, drill holes in the
walls for them.
If the brine pipes are to be routed below ground see the instructions below.
300 mm
300 mm
300 mm
3
1500 mm
1
Figure 24: Necessary service space for outdoor unit.
3
2.13 Recommended location of outdoor unit,
DHP‑A, -AL
2
3
When positioning the outdoor unit, note the following:
unit does not have to be positioned in any spe⚠⚠cific
The outdoor
direction.
1
from the outdoor unit when the fan is in
⚠⚠operation,
Noise is produced
remember this when positioning to reduce disturbance in your own home as well as to any neighbours.
the outdoor unit is defrosting, water will drip straight
⚠⚠down
When under
the unit. The area around the outdoor unit must
therefore be properly drained in order to catch the water
(approximately 2 litres per defrost).
that the outdoor unit must have a certain amount
⚠⚠of
Remember
room in order to function and for servicing, see “Heat
pump information” chapter.
that the water that drips from the outdoor unit
⚠⚠during
Remember
defrost must be able to drain into the ground. The
outdoor unit must therefore not be positioned on asphalt or
slabs where water cannot drain easily.
outdoor unit’s adjustable stand must be positioned on
⚠⚠aThe
secure base such as wooden sleepers, paving slabs or cast
footings.
20
4
Figure 25: Drilling holes for brine pipes.
Position
1
2
3
4
Name
Insert pipe
Brine pipe
Mortar
Sealant
1. Drill holes in the wall for the insert pipes (1) for the brine pipes.
Follow the dimension and connection diagrams in the section
“Heat pump information”. If there is any risk of groundwater
infiltration at brine pipe lead-ins, watertight grommets must be
used.
2. Position the insert pipes (1) in the holes sloping downwards.
The inclination must be at least 1cm every 30cm. Cut them at
an angle (as illustrated) so that rain water cannot get into the
pipes.
3. Insert the brine pipes (2) into the insert pipes in the installation
room.
4. Fill in the holes in the wall with mortar (3).
5. Ensure that the brine pipes (2) are centred in the insert pipes (1)
so that the insulation is distributed equally on all sides.
6. Seal the insert pipes (1) with a suitable sealant (foam) (4).
VMBMA502
4
Separating the heat pump
Does not apply to DHP-A, -AL.
If there is a shortage of space when transporting the heat pump to
the installation location it may be necessary to separate the heat
pump unit and the water heater.
The following instruction describes how the heat pump is separated to transport the separate parts more easily.
not lift heavy equipment alone, always use two
⚠⚠people
NOTE! Do
for heavy lifting.
-Top sensor (325, 326)
11. Unscrew the electrical panel’s screws.
12. Turn the electrical panel through 180° and place it in front of
the heat pump unit.
1. Remove the packaging.
2. Press against the front cover; and turn the catch 90° degrees
anti-clockwise to release the front cover.
3. Tilt the front cover outwards.
4. Lift the front cover upwards to remove it from the heat pump.
1
2
Figure 28: Electrical panel.
13. Disconnect the T-pipe connector from the return line under the
heater, see figure below.
14. Disconnect the flexible hose at the electrical auxiliary heater,
see figure below.
3
Figure 26: The front cover.
5. Carefully pull the switch free from the control panel.
6. Unscrew the front stay bar and top panel.
7. Pull the side panels forward and then upwards and outwards to
remove them.
Figure 29: Connections.
15. Unscrew the four screws in the corners that hold the water
heater’s bottom plate.
⚠⚠NOTE! Always use two people for heavy lifting.
16. Lift off the unit with the water heater, pipe and electrical auxiliary heater.
Figure 27: Covers.
8. Slacken off the screws that hold the rear panel and remove it.
9. Disconnect the electrical connectors at the exchange valve, circulation pump and electrical auxiliary heater.
10. Disconnect the cables for the following sensors at the electrical
panel:
- Supply line (301, 302)
- Hot water (311, 312)
Figure 30: Separating.
17. Put the unit down carefully.
VMBMA502
21
5
5.1
Unpacking and installation
2. Tilt the front cover outwards.
3. Lift the front cover upwards to remove it from the heat pump.
Setting up
5.3
• The heat pump has feet that can be adjusted 20 mm to compensate for irregularities in the surface on which it is sitting. If the
surface is so irregular that the feet cannot compensate for it, the
installation engineer must remedy this.
• It is recommended that a condensation drain be installed from
the drain pipe of the drip tray while the heat pump is on its side.
The drain pipe opens through a hole in the base plate and has a
Ø 10 mm hose connection.
1. Move the heat pump to the installation site. If there is little
space the heat pump can be separated according to the section
“Separating the heat pump”.
2. Remove the packaging.
Unpacking and installing the outdoor
unit
Applies to DHP-A, -AL.
The outdoor unit is packed and delivered in a crate.
1. Start by unpacking the unit from the crate.
2. Check that the delivery is complete, it must contain the outdoor unit, front cover, cover as well as a disassembled stand
including necessary screws, nuts and washers.
Assembling the stand
1. Screw the two horizontal struts together (1) using the two ends
(2) as illustrated below. Use 8 x M6x10 screws. The curved edges
of the horizontal struts must be facing upwards and inwards.
Bent edge
2
1
1
2
3
Slit
Figure 31: Condensation drain connection
Slit
3
3. Install a condensation drain on the connection in the base plate
if required.
4. Set up the heat pump in the installation site.
Figure 34: Assembling the stand.
2. Screw the adjustable feet (3) into the holes under the ends.
Preparing the outdoor unit
While the outdoor section remains on the pallet it should be prepared for placing on the stand. Carry out the following:
3. There are three M6x20 screws on the lower edge of the outdoor
unit. Unscrew them so that 2-3 mm of the thread remains. Use a
torx TX25 screwdriver, or equivalent.
4. Raise the outdoor unit. NOTE! Do not lift the side plates.
5. Remove the side plates. They are held in place by clamps and
so are removed by pulling outwards.
6. Remove all four screwed lifting eyes. Use a 13 mm wrench, or
equivalent.
Figure 32: Adjusting the feet.
5. Adjust the feet so that it is horizontal.
5.2
Removing the front cover
damage the electrical wiring for the control
⚠⚠computer
NOTE! Do not
when the front cover is removed!
To install the heat pump the front cover must be removed.
Assembling the outdoor unit on the stand
1
7. Lift the outdoor unit into the place on the stand.
2
3
Figure 33: Removing the front cover.
1. Hold the front panel with one hand and turn the catch 90° anticlockwise to detach the front panel.
22
VMBMA502
Figure 35: Lift the outdoor unit onto the stand.
8. Screw the outdoor unit onto the stand. Use 4 x M6x20 screws. It
may be necessary to push and pull the stand slightly in order to
get the screw holes to align.
When filling the brine system the outdoor unit must
⚠⚠be
NOTE!
bled using the bleed screws on the connecting pipes
inside the side covers. We recommend that you return to this
instruction after the brine system has been filled.
9. Reinstall the side panels.
Assembling the front cover
10. Hook the lower edge of the front cover onto at least one of the
three screws in the bottom edge of the stand.
11. Secure the upper edge of the front panel temporarily in the
centre hole. Use 1 x M6x15 torx TX25.
12. Align all the three screws in the lower edge.
13. Screw the three screws in the lower edge fully. Use a torx TX25
screwdriver, or equivalent.
14. Secure the upper edge of the front cover.
Use only the three screws screwed into the outdoor unit, see figure
below. Use only 3 x M6x15 torx TX25.
Figure 38: Screw the front cover into place.
17. Hook the cover onto the stand.
Figure 36: Secure the cover.
Assembling the cover and cover plate
Figure 39: Hook the cover into place.
15. Hook the cover at the front edge on the front cover.
Assembling the defrost sensor
Figure 37: Hook the front cover into place.
16. Secure the cover using a screw on each side. Use 2 x cross head
screws.
If the cover does not align with the side cover plates it may be necessary to drill new Ø 3 mm holes:
• Mark for the new holes
• Lift off the cover
• Drill the holes
• Install and screw the cover into place
Figure 40: Hook the defroster sensor into place.
18. Slide the mounting for the defroster sensor into the hole on
the reverse of the outdoor unit until it hooks into place on the
edge.
19. Secure the defroster sensor at the bottom of the mounting
using a cable tie.
The outdoor unit is now mounted and can be adjusted on the site
where it should be set up.
VMBMA502
23
6
Piping installation
DHP-H, -C, -A, DHP-H Opti Pro, connection diagram VL
system
To prevent leaks, ensure that there are no stresses in
⚠⚠the
NOTE!
connecting pipes!
1
It is important that the heating system is completely
⚠⚠bled
NOTE!after
installation.
2
3
diagrams show general piping
⚠⚠arrangements.
NOTE! The connection
It is imperative that piping installation is
carried out in accordance with applicable local rules and
regulations. The hot water tank must be equipped with an
approved safety valve (supplied).
4
5
8
9
10
14
⚠⚠NOTE! Bleed valves must be installed where necessary.
6
• Ensure that the piping installation follows the dimension and
connection diagrams in section “Heat pump information”.
• For UK specific advice on piping arrangements please refer to
the ‘UK-specific appendix to Installation and Service Instructions'.
An approved safety valve is factory fitted to all single phase heat
pumps incorporating stainless steel hot water tanks.
• The position lists show the components and parts included in the
delivery in italics.
11
18
12
13
7
15
Selecting the heating system
The heat pump is set to VL system on delivery, that is with an integrated electrical auxiliary heater and an exchange valve after the
auxiliary heater.
What determines which of the three systems VL, D or VLD should
be used is, among other things, how any auxiliary heater is used for
hot water production, and which model of heat pump is used.
6.1
VL system
In a VL system the heat pump can produce both heating and hot
water with the compressor and the integrated auxiliary heater.
Production of heating and hot water cannot occur at the same time
because the exchange valve for heating/hot water is positioned
after the auxiliary heater.
Figure 41: General connection diagram DHP-H, -C, ‑A, DHP-H Opti Pro.
Position
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
Name
Supply line
Return line
Safety valve cold water (9 bar) (included in delivery)
Safety valve expansion heating system
Expansion heating system
Strainer (part of the delivery)
Flexible hoses (part of the delivery)
Vacuum valve
Non-return valve
Shut-off valve
Non-return valve
Shut-off valve
Hot water
Cold water
Heat pump (part of the delivery)
Pressure gauge
Expansion outlet Brine DHP-A
Safety valve for temperature and pressure (only applies to certain markets)
Safety valve for temperature and pressure (only applies to certain markets)
2 13 14
1
12
6
3 18
7
19 4
17
16
5
Figure 42: Principal pipe connection DHP-H, -C, ‑A, DHP-H Opti Pro..
24
VMBMA502
DHP-L, connection diagram VL system
DHP-AL, connection diagram VL system
1
2
4
11
12 13 14
5
15
16
6
7
18
3
17
13
7
Figure 45: General connection diagram DHP-AL.
Figure 43: General connection diagram DHP-L.
Position
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Name
Supply line
Return line
Safety valve cold water (9 bar) (included in delivery)
Safety valve expansion heating system
Expansion heating system
Strainer (part of the delivery)
Flexible hoses (part of the delivery)
Vacuum valve
Non-return valve
Shut-off valve
Cold water
Hot water
Heat pump (part of the delivery)
Water heater
Manometer (not included
Safety valve for temperature and pressure (only applies to certain markets))
1
Position
1
2
3
4
5
6
7
11
12
13
14
15
16
17
18
19
20
21
2
4
2
Name
Supply line
Return line
Heat pump (part of the delivery)
Safety valve
Expansion tank
Strainer (part of the delivery)
Flexible hoses (part of the delivery)
Safety valve (9 bar) (included in delivery)
Vacuum valve
Non-return valve
Shut-off valve
Cold water
Hot water
Water heater (part of the delivery)
Bleed valve at stainless steel water heater
Pressure gauge
Filler cock and non-return valve
Safety valve for temperature and pressure (only applies to certain markets)
1
15
6
6
4 19
5
15
16
20
11
21
5
7
14
7
18
Figure 46: Principal pipe connection DHP-AL.
Figure 44: Principal pipe connection DHP-L.
VMBMA502
25
6.2
D system, DHP-L
6.3
With a DHP-L in a D system, the heat pump can produce both heating and hot water with the compressor and an external auxiliary
heater (oil boiler, electric boiler, district heating or similar) that is
located after the exchange valve replaces the integrated auxiliary
heater to produce heat.
The cables for the integrated auxiliary heater must be disconnected, which means that the heat pump cannot carry out peak heat
charging (legionella function). Peak heat charging must take place
with an electric heating element that is integrated in the water
heater or with an electric heating element on the supply line to the
water heater.
The heat pump control computer also controls an additional shunt.
DHP-L, connection diagram D system
VLD system, DHP-A, -AL
A VLD system is largely similar to a VL system, but with an external
auxiliary heater (often a boiler that is fired with solid fuel) in combination with a DHP-A or DHP-AL.
DHP-A’s integrated exchange valve is replaced by an exchange
valve that is located after the external auxiliary heater so that both
the heat pump and the auxiliary heater can produce heat and hot
water. The integrated exchange valve is disengaged with the flow
direction locked towards the heating system.
Production of heating and hot water cannot occur at the same time
because the exchange valve for heating/hot water is positioned
after the auxiliary heater. The integrated auxiliary heater carries
out peak heating charging (legionella function) in those operating
modes that permit auxiliary heat.
The heat pump’s control computer controls the external additional
heater via an output (283) on the defrosting card (factory installed
in DHP-A or DHP-AL). The heat pump control computer also controls an additional shunt.
DHP-A, connection diagram VLD system
13
Figure 47: General connection diagram DHP-L, D system.
Position
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
26
Name
Supply line
Return line
Safety valve cold water (9 bar) (included in delivery)
Safety valve expansion heating system
Expansion heating system
Strainer (part of the delivery)
Flexible hoses (part of the delivery)
Vacuum valve
Non-return valve
Shut-off valve
Cold water
Hot water
Heat pump (part of the delivery)
Water heater
External auxiliary heater
Circulation pump
Non-return valve
Moved supply line sensor (included in heat pump)
Auxiliary shunt
Safety valve for temperature and pressure (only applies to certain markets)
Figure 48: General connection diagram DHP-A, VLD system.
Position
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
VMBMA502
Name
Supply line
Return line
Safety valve cold water (9 bar) (included in delivery)
Safety valve expansion heating system
Expansion heating system
Strainer (part of the delivery)
Flexible hoses (part of the delivery)
Vacuum valve
Non-return valve
Shut-off valve
Non-return valve
Shut-off valve
Hot water
Cold water
Heat pump (part of the delivery)
External auxiliary heater
Circulation pump
Non-return valve
Moved supply line sensor (included in heat pump)
Auxiliary shunt
External exchange valve
Safety valve for temperature and pressure (only applies to certain markets)
6.6
DHP-AL, connection diagram VLD
23
20 22 10
All pipes should be routed in such a way that vibrations cannot be
transmitted from the heat pump through the piping and out into
the building. This also applies to the expansion pipe. To avoid the
transmission of vibrations, we recommend that flexible hoses are
used for the supply line and return line on both the heating system
and brine system sides. Flexible hoses are available to purchase
from Danfoss AS. The figures below show how appropriate and
inappropriate installations look using this type of hose.
To avoid noise caused by pipe mounting, rubber-coated clamps should
be used to prevent the transmission of vibrations. However, installation
should not be too rigid and the clamps must not be too tight.
2
19
3
21
11
4
12
13
14
15
5
7
24
6
14
16
18
1
13
Connecting the heating system supply
and return lines
17
Figure 50: Do not twist the flexible hoses as they are installed. At threaded connections, use a counterhold spanner.
7
Figure 49: General connection diagram DHP-AL, system VLD.
Position
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Name
Heat pump (part of the delivery)
Supply line
Return line
Safety valve
Expansion tank
Strainer (part of the delivery)
Flexible hoses (part of the delivery)
Mixer valve
Exchange valve
Safety valve (9 bar) (included in delivery)
Vacuum valve
Non-return valve
Shut-off valve
Cold water
Hot water
Water heater (part of the delivery)
Bleed valve at stainless steel water heater
External auxiliary heater
Circulation pump
Non-return valve
Moved supply line sensor (included in heat pump)
Auxiliary shunt
Safety valve for temperature and pressure (only applies to certain markets)
6.4
Safety valves
with a closed expansion tank must also be
⚠⚠equipped
Radiator systems
with an approved pressure gauge and safety valve,
Figure 51: Cut the hose to the correct length to avoid excess bowingout or stretching at bends.
Figure 52: Cut the hose to the correct length to avoid excess bowing-
out or stretching and offset the ends so that the hose is not installed completely straight.
minimum DN 20, for a maximum 1.5 bar opening pressure, or
according to country specific requirements.
hot water pipes as well as overflow pipes from
⚠⚠safety
Cold and
valves must be made of heat resistant and corrosion-
resistant material, e.g. copper. The safety valve overflow pipes
must have an open connection to the drain and visibly flow
into this in a frost-free environment.
pipe between the expansion tank and the
⚠⚠safety
The connecting
valve must slope continuously upwards. A continuous
upwards slope means that the pipe must not slope downwards from the horizontal at any point.
6.5
Connecting cold and hot water pipes
1. Connect the cold water and hot water pipes with all the necessary components according to the connection diagram for the
relevant system.
Figure 53: Use fixed pipe bends to avoid excess stress on bends next to connections.
1. Connect the supply line with a flexible hose connection and
with all the necessary components.
2. Connect the return line with a flexible hose connection and
with all the necessary components including a filter.
3. Insulate the supply and return lines.
4. Connect the expansion tank to the expansion outlet (22mm Cu)
on the top of the heat pump.
VMBMA502
27
6.7
Filling the water heater and heating system
1. Fill the water heater with cold water by opening the filler valve
(10) which is located on the valve pipe.
2. Bleed by opening one of the hot water taps.
3. Then fill the water heater coil and the heating system with
water through the filling valve (12) to a pressure of approx. 1
bar.
6.8
1.
2.
3.
4.
5.
Bleeding the heating system
Open all radiator valves fully.
Bleed all radiators.
Refill the heating system to a pressure of approximately 1 bar.
Repeat the procedure until all air has been removed.
Leave the radiator valves fully open.
7
Electrical Installation
current! The terminal blocks are live and can be
⚠⚠highly
Electrical
dangerous due to the risk of electric shock. The power
supply must be isolated before electrical installation is started. The heat pump is connected internally at the factory, for
this reason electrical installation consists mainly of the connection of the power supply.
• Electrical installation may only be carried out by an authorized
electrician and must follow applicable local and national regulations.
• The electrical installation must be carried out using permanently
routed cables. It must be possible to isolate the power supply
using an all-pole circuit breaker with a minimum contact gap of 3
mm. (The maximum load for externally connected units is 2A).
• Electrical connection can also cause noise so this installation
must be carried out appropriately. The figure below shows an
appropriate installation. There is approximately 300mm free
cable between the heat pump and building, however, this
requires the cable to be securely installed onto the top panel so
that the cable cannot be fed into the heat pump. It is inappropriate to bolt trunking between the heat pump and the wall. This is
because vibrations can then be transmitted from the heat pump
through the trunking to the walls of the house.
• When the cable is connected to the terminal block a screwdriver
is used to open the terminal block, see figure below.
2
5
3
1
OK!
4
Figure 54: Connecting cable to terminal block.
1
2
3
4
5
8
6
9
7
10
11
12
Figure 55: The location of the components on the electrical panel.
Position
1
2
3
4
5
6
7
8
9
10
11
12
28
VMBMA502
Name
Terminal block (applies to the expansion card)
Terminal block (applies to DHP-A, -AL)
Defrost card (applies to DHP-A, -AL)
Terminal block
Space for Danfoss Online
Warning decal
Space for expansion card
Contactor for compressor
Automatic fuses
Resetting overheating protection
Control computer
Soft starter card
Figure 56: Recommended distance between trunking on the wall and
trunking on the heat pump is 300mm.
7.1
7.4
Connect power supply, 400V 3N
The power cable may only be connected to the termi⚠⚠nal
NOTE!
block intended for this purpose. No other terminal blocks
may be used!
7.2
• The sensor must be positioned at least 1 m from openings in the
walls that emit hot air.
• If the sensor cable is connected through a pipe, the pipe must be
sealed so that the sensor is not affected by outgoing air.
The outdoor sensor is connected by a two core cable. For a cross
section of 0.75 mm2 a maximum cable length of 50 m applies. For
greater lengths a cross section of 1.5 mm2 is used, up to a maximum of 120 m.
Then connect the sensor to the heat pump control system in
accordance with the instructions below.r.
1. Route the outdoor sensor connection cable through the cable
bushing in the top panel to the terminal block.
2. Connect the sensor to the terminal blocks according to the connection diagram.
Connect power supply, 230V 1N SP
Changing the language in the control
computer
If necessary, change the language in the control computer menus.
1. Ensure that the main circuit breaker is on.
2. Open the SERVICE menu by holding in for five seconds.
3. Change language in the control computer menu SERVICE ->
INSTALLATION -> ENGLISH, select language and .
The power cable may only be connected to the termi⚠⚠nal
NOTE!
block intended for this purpose. No other terminal blocks
may be used!
1. Route the power cable through the opening in the top panel of
the heat pump to the terminal blocks.
2. Connect the power cable to the terminal block.
7.3
Position and connect outdoor sensors
outdoor sensor is connected with extra low pro⚠⚠tection
NOTE! The
voltage. Follow the specific installation instructions
2/3 x H
H
for the outdoor sensor!
Recommended location
Unsuitable location
Figure 57: Positioning the outdoor sensor.
• Position the outdoor sensor on the north or north west side of
the house.
• To measure the outdoor temperature as accurately as possible,
the sensor must be positioned 2/3 of the way up the facade on
houses up to three storeys high. For higher buildings, the sensor
should be positioned between the second and third storeys. Its
location must not be completely protected from the wind but
not in a direct draft. The outdoor sensor should not be placed on
reflective panel walls.
VMBMA502
29
7.5
Resetting to system D or VLD
For a description of the different system solutions, see section
Piping installation.
The heat pump has VL as factory setting.
For D system, DHP-L:
If D system is selected, the cables for the internal auxiliary heater
must be disconnected according to the figure below.
Connect the external auxiliary heater according to the connection
diagram below.
For VLD system, DHP-A, -AL:
If the VLD system is selected DHP-A’s integrated exchange valve
must be limited in open mode to the heating system.
To limit the direction of flow for the exchange valve for the heating
system:
1. Ensure that the main circuit breaker is on.
2. Open the SERVICE menu by holding in for five seconds.
3. Open the control computer menu SERVICE -> MANUAL TEST.
4. Set the value for MANUAL TEST to 1.
5. Set the value for REV.V. HOT WATER to 0.
6. Wait for 15 seconds, disconnect the quick connector at the
exchange valve.
7. Set the value for MANUAL TEST back to 0.
8. Connect the external exchange valve cables to the corresponding cables in the disconnected quick connector.
9. Move the supply line sensor out to the position shown in the
connection diagram for the VLD system.
In the control computer:
To change to system D or VLD:
1. Ensure that the main circuit breaker is on.
2. Open the SERVICE menu by holding in for five seconds.
3. Change system in the control computer menu SERVICE ->
INSTALLATION -> SYSTEM -> HEATING SYSTEM, select system
with and .
7.6
Changing the number of auxiliary heating power stages
NOTE! Setting the maximum permitted number of power
⚠⚠stages
for the auxiliary heating must be carried out.
1. Ensure that the main circuit breaker is on.
2. Open the SERVICE menu by pressing for five seconds.
3. Change the number of auxiliary heating power stages in the
control computer menu SERVICE -> ADD.HEAT -> MAXSTEP,
select the number of stages and .
7.7
Connect outdoor unit, DHP-A, -AL
NOTE! The power cable may only be connected to the termi⚠⚠nal
block intended for this purpose. No other terminal blocks
may be used!
For correct connection between the heat pump and the outdoor
unit, 8 connections must be made, see also separate sheet with
electrical connections.
1. Route the power cable through the opening in the top panel of
the heat pump to the terminal blocks.
2. Connect the power cable to the terminal block.
30
VMBMA502
8
8.1
Brine installation
Heat sources
Bedrock heat
To use rock as the heat source one or more boreholes is/are drilled
and the brine hose is lowered into it/them. The hole is filled with
water and a fitting with a weight is fastened to the hose before it is
lowered.
Figure 60: Ground water as heat source.
When ground water is used as a heat source the heat pump installation must be equipped with a flow guard (available as an accessory from the Danfoss range) that stops the heat pump if the flow
in the brine pipe is too low, which can create a risk of freezing in
the ground water exchanger.
Ground heat
The stored heat energy in the ground can be used as a heat source.
In this case a brine loop (or loops) is/are laid under the surface layer
of ground.
Figure 58: Borehole in rock as heat source.
Lake heat
When lake water is used as the heat source one or more brine coils
is/are submerged in the water. The coils must be anchored to the
bottom with weights or a net to prevent them floating.
Figure 61: Ground as heat source.
Air heat
The DHP-A and DHP-AL heat pumps are equipped with an outdoor
unit that uses outdoor air as a heat source. DHP-A, -AL can make
use of the energy in the air outdoors down to temperatures of
‑-20°C. To obtain the correct airflow through the outdoor section it
is equipped with a fan.
Figure 59: Lake water as heat source.
Groundwater heat
Ground water can be used as a heat source on the condition that
there is a sufficiently large flow of ground water in the borehole. A
submersible pump is lowered in one hole and pumps up groundwater, which flows through a separate heat exchanger, and is then
returned through another borehole. The heat pump has a short
brine circuit that works directly against the separate groundwater
exchanger.
VMBMA502
Figure 62: Connecting outdoor unit to use air as heat source.
31
8.2
Information collector pipe
rules and regulations related to type of collector must
⚠⚠be
Local
followed.
Borehole collector: Fully welded plastic pipe collector (PEM PN 6.3)
according to the applicable local and national regulations with factory manufactured return bend.
Ground collector: Fully welded plastic pipe collector (PEM PN 10)
according to the applicable local and national regulations.
In countries where frost damage occurs, the collector pipe beside
an outer wall (minimum 2 metres) must be insulated in such a way
that frost damage is prevented. This applies regardless of ground,
rock or lake heat.
Minimum shaft depth between the energy well and the building is
0.5 m. If burial to that depth is not possible the pipes must be protected against any external mechanical damage.
DHP-H,
‑C, -L
Pytg
Size
kPa
1 coil
2 coils
3 coils
4 coils
10
67
129
2 x 419
3 x 670
4 x 1117
12
64
91
2 x 376
3 x 640
4 x 914
16
56
37
2 x 165
3 x 329
4 x 400
For hoses of type PEM DN 40, Øi = 35,2.
DHP-H,
‑C, -L
Pytg
Calculated maximum coil length per coil,
in metres
Size
kPa
1 coil
2 coils
3 coils
4 coils
6
31
517
2 x 775
3 x 1033
4 x 1033
8
33
367
2 x 660
3 x 943
4 x 825
10
67
394
2 x 1340
3 x 1675
4 x 1675
12
64
291*
2 x 1067
3 x 1280
4 x 1600
16
56
119
2 x 560
3 x 933 4 x 1120
*) When dimensioning size 12, a borehole depth that exceeds this recommendation for coil length is often required. In such cases two coils
should be used.
>0,5m
>2,0m
The different brine coils are distributed from a common collection well. All return lines are led back to the well and are equipped
with choke valves because the flow of each individual coil must be
adjusted.
Figure 63: Shaft depth for, and insulation of, collector hoses.
8.3
Calculated maximum coil length per coil,
in metres
Choke valves
Brine coil 1
Connection to outdoor unit
Connection for the brine circuit from the heat pump to the outdoor unit can be carried out using pipes or hoses. Depending on
what connection is selected and what diameter the connection
has, there is a maximum length that the connection may be. The
maximum lengths in the table below are based on ethylene glycol
(which is mixed to anti-freeze protection down to -32°C) at 0°C.
DHP-A,
-AL
Pytg
Calculated maximum coil length between the
HP and outdoor unit, in metres
Size
kPa
Cu22
Øin = 20.0
Cu28
Øin = 25.6
PEM
DN 25
Øin = 21.0
PEM
DN 32
Øin = 28.0
6
30
34
(2 x 17)
133
(2 x 66.5)
48
(2 x 24)
173
(2 x 86.5)
8
63
21
(2 x 10.5)
98
(2 x 49)
30
(2 x 15)
150
(2 x 75)
10
50
11 *
(2 x 5.5)
47
(2 x 23.5)
13 *
(2 x 6.5)
78
(2 x 39)
12
43
Collection well
Brine coil 2
Figure 64: The collection well for distributing to several brine coils.
Choke valves with flow indicators (available as accessories from the
Danfoss range) are used to adjust the brine flow so that it is the
same in all coils.
If choke valves with flow indicators are not available adjust the
valves until the temperature of all the coil return hoses is the same.
5*
26
8*
44
(2 x 2.5)
(2 x 13)
(2 x 4)
(2 x 22)
*) Not recommended because of high liquid speeds with risk of corrosion/noise problems.
8.4
Connection of several brine coils
When several brine coils are used for a heat pump installation,
regardless of what heat source is used, the length of the coils must
not exceed the values in the following tables. The coil lengths are
based on ethanol 30% at 0°C.
For hoses of type PEM DN 32, Øi = 28,0:
DHP-H,
‑C, -L
Pytg
Size
kPa
1 coil
2 coils
3 coils
4 coils
6
31
182
2 x 443
3 x 620
4 x 775
8
33
94
2 x 220
3 x 471
4 x 660
32
Calculated maximum coil length per coil,
in metres
VMBMA502
8.5
Connection diagram
DHP-A:
The position lists show the components and parts included in the
delivery in italics.
If the outdoor unit is installed
higher than the heat pump the
expansion outlet must be used
together with a pressure tank.
DHP-C:
If the outdoor unit is installed at the same
level or lower than the heat pump, the
accompanying plastic vessel can be used.
The upper part of the outdoor unit must
then not exceed the fluid level in the
vessel.
Figure 67: General connection diagram brine pipes, DHP-A.
Figure 65: General connection diagram brine pipes, DHP-C.
Position
1
2
3
4
5
6
7
8
9
10
Name
Brine in
Brine out
Shut-off valve
Shut-off valve
Shut-off valve
Strainer
Shut-off valve
Safety valve (1.5 bar)
Bleed and expansion tank
Shut-off valve
DHP-H, DHP-L:
Position
1
2
3
4
5
6
7
8
9
10
11
Name
Brine in
Brine out
Shut-off valve
Shut-off valve
Shut-off valve
Strainer
Shut-off valve
Safety valve (1.5 bar)
Bleed and expansion tank
Shut-off valve
Pressure tank
Outdoor unit:
Figure 68: Connection diagram, DHP-A -AL outdoor unit
Position
1
2
3
Name
Brine out
Brine in
Flexible hoses
Figure 66: General connection diagram, brine pipes DHP-H, DHP-L.
Position
1
2
3
4
5
6
7
8
9
10
Name
Brine in
Brine out
Shut-off valve
Shut-off valve
Shut-off valve
Strainer
Shut-off valve
Safety valve (1.5 bar)
Bleed and expansion tank
Shut-off valve
VMBMA502
33
DHP-AL:
If the outdoor unit is installed
higher than the heat pump
the expansion outlet must be
used together with a pressure tank.
If the outdoor unit is installed at the same
level or lower than the heat pump, the
accompanying plastic vessel can be used.
The upper part of the outdoor unit must
then not exceed the fluid level in the
vessel.
Heat pump
Water heater
Figure 69: Connection diagram for brine pipes.
Position
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Name
Brine in
Brine out
Shut-off valve (part of the filler cock)
Shut-off valve (part of the filler cock)
Shut-off valve (part of the filler cock)
Strainer (part of the filler cock)
Shut-off valve (part of the filler cock)
Safety valve (1.5 bar)
Bleed and expansion tank
Shut-off valve
Pressure tank
Outdoor unit
Flexible hoses
Bleed valve
Moved out supply line sensor, brine
8.6
Installing brine pipes
brine pipes running outside the house to the collector can be
buried, however they must be well insulated.
to DHP-A, -AL: Bear in mind that the outdoor unit
⚠⚠may
Applies
move during defrosts, use flexible hoses to connect the
pipes from the heat pump and pipes on the outdoor unit.
8.7
Filling the brine system
Before filling the brine system, the electrical installa⚠⚠tion
NOTE!must
be completed so that it is possible to operate the
brine pump.
Before filling the brine system for DHP-A, -AL, the
⚠⚠water
NOTE!heater
MUST be filled.
⚠⚠anti-freeze.
NOTE! Always check local rules and regulations before using
1. Determine to which side the brine pipes are to be connected.
2. Route the out pipe for brine in through the corresponding hole
(with rubber collar) in the heat pump side.
3. Install all necessary components on the pipe.
Remember to install the filler cock with the filter cover upwards.
4. Route the out pipe for brine out through the corresponding
hole (with rubber collar) in the heat pump side.
the brine lines are connected to the right for DHP-A,
⚠⚠the
When
brine out line must be routed over the brine pump, under
the compressor’s vacuum pipe and under the condenser’s
flexible hose, see figure below.
Anti-freeze with corrosion protection additives must
⚠⚠be
NOTE!
used and mixed to achieve frost protection down to -15°C
for models Diplomat and Comfort.
only ethylene glycol as anti freeze for DHP-A and
⚠⚠DHP-AL,
NOTE! Usemixed
to achieve frost protection down to -32°C.
Calculated volume, DHP-H, -C, -L
The volume of the brine system is calculated as follows:
• Heat pump (exchanger and piping) approximately 2 litres
• Expansion tank approximately 3 litres
• Collector (single pipe): PEM 40 approximately 1.0 litre/m; PEM 32
approximately 0.6 litre/m; Cu 28 approximately 0.5 litre/m
Calculated volume, DHP-A, -AL
The volume of the brine system is calculated as follows:
• Heat pump (exchanger, pipe and outer jacket) approximately 47
litres
• Expansion tank approximately 3 litres
• Outdoor unit approximately 7 litres
• Collector (single pipe): 28 mm pipe approx. 0.5 litre/m
Figure 70: Routing of pipes for brine out for DHP-A.
5. Install the out pipe with all the accompanying components.
6. Install the expansion tank with the safety valve.
7. Fit both brine pipes with anti-diffusion insulation running all
the way from the heat pump to the lead-in in the wall. The
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Filler cock
When the filler cock is installed on the return line, remember to
turn the strainer cover upwards in order to minimise the amount of
air that gets into the brine system when cleaning the filter.
Figure 71: Filler cock.
Position
3
4
5
6
7
Name
Shut-off valve
Shut-off valve
Shut-off valve
Strainer
Shut-off valve
8.8
Bleeding the brine circuit
⚠⚠NOTE! When topping up, the brine pump must be running.
1. Start the brine pump in the control computer menu SERVICE ->
MANUAL TEST -> BRINEPUMP, set the value to 1.
2. Check that the level in the bleed tank (9) is stabilised.
3. Dismantle the safety valve (8) on the bleed tank.
4. Top up with brine to 2/3 of the tank through the connection on
which the safety valve (8) was installed.
5. Leave the brine pump running so that that the air in the system
collects in the bleed tank.
6. As air separates in the bleed tank the fluid level drops, top up
as in step 4.
7. Reinstall the valve (8) when all air has been removed from the
system.
8. Open valve (8) and release any overpressure. The fluid level
should not fall below 2/3 of the height of the tank.
9. Check that valve (3) is closed.
10. Stop the brine pump in the control computer menu SERVICE ->
MANUAL TEST -> BRINEPUMP, set the value to 0.
11. Switch to the desired operating mode if the heating system has
been filled and bled.
Collect any excess brine in a plastic container for topping up the
system if necessary (leave it with the customer).
Figure 72: Filling the brine system
Position
1
2
3
4
5
6
7
8
9
10
11
12
11. Start the brine pump manually in the control computer menu
SERVICE -> MANUAL TEST -> BRINEPUMP, set the value to 1.
12. Run the brine pump and the external pump (11) in series until
fluid, clear of air, comes out of the return hose from the valve
(3).
13. Stop the brine pump in the control computer menu SERVICE
-> MANUAL TEST -> BRINEPUMP, set the value to 0, at the same
time leave the external pump running.
14. Open valve (4) with the external pump running to eliminate the
air between the valves (3) and (5).
15. Close valve (3) and pressurise the system using the external
pump. NOTE! Max. 150kPa, (1.5bar).
16. Close valve (5).
17. For DHP-A, -AL: close the defroster shunt in the control computer menu SERVICE -> MANUAL TEST -> SHUNT DEFR, set the
value to 0.
18. Stop the external pump (11) and disconnect the filling equipment.
19. Install insulation on the filler cock.
Name
Brine out
Brine in
Shut-off valve (part of the filler cock)
Shut-off valve (part of the filler cock)
Shut-off valve (part of the filler cock)
Strainer (part of the filler cock)
Shut-off valve (part of the filler cock)
Safety valve 1.5 bar
Bleed and expansion tank
Shut-off valve
External pump
External container
8.9
1. Set the heat pump operating mode to “OFF” in the control computer menu INFORMATION -> OPERAT.
2. Mix water and anti-freeze in the correct proportions in an external container (12). Note that each pack must be well mixed.
3. Check that the freezing point of the mixture is reached using a
refractometer (-15°C for DHP-H, -C, -L)(-32°C for DHP‑A, -AL).
4. Fill the system with the mixture using an external pump (11)
which can bleed the brine pipes. Connect the pressure side of
the pump to the filler connection at valve (5).
5. For DHP-A, -AL: Open the defroster shunt in the control computer menu SERVICE -> MANUAL TEST -> SHUNT DEFR, set the
value to -.
6. Close valve (4).
7. Open valves (5) and (10).
8. Connect a transparent hose (3) that opens out into the external
container (12).
9. Open valve (3).
10. Start the external pump (11) and fill the brine pipes.
Vent outdoor unit, DHP-A, -AL
If the outdoor unit is installed higher than the heat pump with a
pressurised brine system, the outdoor unit must be bled using the
bleed screws on the connection pipes.
The side covers of the outdoor unit must be removed to access the
bleed screws.
Bleed screws
Figure 73: Bleed screw locations.
If the outdoor unit is installed at the same level or lower than the
heat pump it is recommended that the brine circuit in the outdoor
unit is also bled.
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35
9
Installing accessories/additional
functions
9.1
9.2
Room temperature sensor
The room temperature sensor has a temperature sensor that
provides a further value that the control computer can use when
calculating the supply temperature. The influence of the room sensor in the calculation can be set in the menu HEAT CURVE-> ROOM
FACTOR. Default setting for ROOM FACTOR is 2 but can be adjusted
from 0 (no impact) to 4 (large impact).
The difference between the desired and actual indoor temperature
is multiplied by the set value for ROOM FACTOR. The set point on
the heating system’s supply line increases or decreases with the
result depending on whether there is a deficit or surplus of heat.
The table below shows examples of how the set point for the supply line is affected at CURVE 40 with different settings for ROOM
FACTOR.
In the event of a heating deficit:
ROOM
FACTOR
Desired room
temperature, °C
Actual room
temperature, °C
0
22
20
Set point for
supply line, °C
EVU function
The EVU function prevents the operation of HEATPUMP, ADD.HEAT
and CIRC.PUMP as long as the contact is closed. The text EVU STOP
is shown in the display when this function is active.
• The EVU function is activated by making a connection between
terminal blocks 307 and 308 using an external 1-pin timer.
9.3
Tariff control
The room temperature lowering function provides a regular, temporary lowering of the indoor temperature.
• The tariff control is activated by making a connection between
terminal blocks 307 and 308 using an external 1-pin timer and a
10 kohm resistor.
• The extent to which the temperature is lowered is set in the
menu INFORMATION -> Heatcurve -> REDUCTION.
9.4
Flow switch/level switch
In certain countries there is a requirement that the heat pump must
be equipped with a level switch for the brine system. Always check
local rules and regulations before commissioning the heat pump.
40
1
22
20
42
2
22
20
44
3
22
20
46
4
22
20
48
In the event of a surplus of heat the conditions are the opposite:
ROOM
FACTOR
Desired room
temperature, °C
Actual room
temperature, °C
0
20
22
Set point for
supply line, °C
40
1
20
22
38
2
20
22
36
3
20
22
34
4
20
22
32
Figure 74: Level switch in the expansion tank/bleed tank.
Position
1
2
3
Name
Safety valve
Level switch
Floats
• Connect the flow switch or level switch to terminal blocks 217
and 219.
room temperature sensor is connected to a safety
⚠⚠extra-low
NOTE! Thevoltage.
1. Install the room temperature sensor in a location in the house
where the room temperature is relatively constant:
• Centrally located in the house
• At eye level
• Not in direct sunlight
• Not in a draft
• Not in a room with alternative heating
2. Hang a thermometer next to the room temperature sensor in
order to calibrate it after connecting it.
3. Connect the room temperature sensor to terminal blocks 303
and 304.
4. After connecting the room temperature sensor, it is calibrated
by holding in both buttons for 15 seconds until the display
starts to flash.
5. Set the actual room temperature that the thermometer shows.
6. Wait 10 seconds until the display stops flashing.
If the display shows “--” for outdoor temperature no outdoor temperature has been read.
9.5
Higher hot water temperature
apply to models with refrigerant R134a, models
⚠⚠DHP-C
Does not
-4H, -5H and -7H.
connect the heat pump to provide a higher
⚠⚠temperature
NOTE! Never unless
the heating or hot water systems require
it. Higher temperatures increase the load on the heat pump.
If necessary, the heat pump can be connected to produce hotter water for the heating system and hot water system when it is
installed.
A
B
Figure 75: The pressure switches on the compressor’s pressure pipe.
1. Move the grey cables, which are normally connected to pressure switch A, to pressure switch B.
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10 Start up
Activate MANUAL TEST
NOTE! Read the safety instructions!
may only be commissioned if the heating
⚠⚠system,
The installation
water heater and brine system have been filled and
bled. Otherwise the circulation pumps may be damaged.
1. Ensure that the main circuit breaker is on.
2. Select operating mode , in the menu INFORMATION ->
OPERAT.->
3. Open the SERVICE menu by holding
in for five seconds.
4. Set the value for MANUAL TEST to 2.
Select position 2 to navigate away from the MANUAL
⚠⚠TEST
NOTE!menu
during ongoing test operation!
is only to be run on auxiliary heating, first
⚠⚠ensure
If the installation
that the heating system is filled and bled and that neither the brine pump nor the compressor can be started. This
is carried out by setting the operating mode to ADD.HEAT.
alarms that may occur in connection with the installation
⚠⚠can
Anybe
fault-traced in the “Troubleshooting” section in the
service instructions.
DHP-H Opti Pro SP (Single Phase) heat pumps it is impera⚠⚠For
tive that the maximum hot water temperature is altered from
the default factory setting from 95C to 85C. Refer to Chapter
14.2 menu Service – HGW Parameter MAX TEMP.
10.1 Installation checklist
Before manual test operation check the following points:
Piping installation, heating system
• Pipe connections in accordance with the connection diagram
• Flexible hoses on the supply and return lines
• Pipe insulation
• Strainer on return line, heating system
• Bleeding of the heating system
• All radiator valves fully open
• Expansion tank heating system (not included in the delivery)
• Safety valve for expansion tank (not included in the delivery)
• Filler cock heating system (not included in the delivery)
• Leakage inspection
If a an external water heater is installed, also check:
• Exchange valve
• Safety valve for cold water (9 bar)
5. Start the brine system’s brine pump by setting the value
BRINEPUMP to 1.
6. Check that the brine pump is running by:
• listening
• putting a hand on the pump
• checking that the level in the expansion tank is stable. If the level
is not stable there is air in the system.
• listen for air
7. If the pump does not start see the section, “Starting circulation
pumps manually”.
8. If there is air in the brine system, bleed according to section,
“Bleeding the brine system”.
9. Stop the brine pump by setting the value to 0.
Test the circulation pump
10. Start the heating system circulation pump by setting the value
CIRC.PUMP to 1.
11. Check that the circulation pump is running by:
• listening
• putting a hand on the pump
• listen for air
12. If the pump does not start see the section, “Starting circulation
pumps manually”.
13. If there is air in the heating system, bleed according to section,
“Bleeding the heating system”.
14. Stop the circulation pump by setting the value to 0.
Electrical Installation
• Circuit-breaker
• Fuse protection
• Direction of rotation of the compressor
• Coolant pump
• At DHP-A, -AL, outdoor unit
• At DHP-A, -AL, defroster sensor
• Positioning of the outdoor sensor
• Control computer settings
If a an external water heater is installed, also check:
• Exchange valve
Test the exchange valve
15. Activate the 3-way valve by setting the value VXV WARMWATER
to 1.
16. Check that the arm on the 3-way valve changes position.
17. If the arm does not change position, see the “Troubleshooting”
section in the service instructions.
Test the compressor
18. Start the circulation pump by setting the value CIRC.PUMP to 1
19. Start the heat pump compressor by setting the value
HEATPUMP to 1. At the same time as the value is set to 1 for
heat pump the brine pump also starts.
Risk of burns, the delivery line on the compressor can
⚠⚠reach
NOTE!70-80°C!
Brine system
•
•
•
•
•
•
•
Test the brine pump
Expansion/bleed tank on brine in
Safety valve for expansion tank
Filler connector on brine in
Insulation in the outside wall lead-in
Other brine pipe insulation
Bleeding of brine system
Leakage inspection
10.2 Manual test
Test operate and at the same time check the function of the tested
components.
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37
10.3 Commissioning
Starting circulation pumps manually
If any of the circulation pumps do not start, it may need to be
helped as follows:
⚠⚠NOTE! Hot!
Figure 76: The pressure pipe should get hot during operation.
20. Check that:
• the compressor is running in the right direction by putting a
hand on the pressure pipe and checking that it is hot.
• it sounds normal and there is no noise.
21. If the pipe does not get hot, or if it sounds abnormal, see the
“Troubleshooting” section in the service instructions.
22. Stop the compressor by setting the value to 0.
23. Stop the brine pump by setting the value to 0.
24. Stop the circulation pump by setting the value to 0.
Figure 77: Bleed screw location.
1. Open and remove the bleed screw on the front of the pump.
Normally a small amount of water comes out when it is
removed.
2. Insert a flat blade screwdriver and turn it in the direction of
rotation of the pump (clockwise).
3. Reinstall the bleed screw with its rubber seal.
Adaptation to the heating system
Testing the auxiliary heating power stages
25. Start the circulation pump by setting the value CIRC.PUMP to 1
26. Start the first auxiliary heating power stage by setting the value
ADD.HEAT 1 to 1.
27. Check that the auxiliary heating power stage works by leaving the menu MANUAL TEST and going into the menu
INFORMATION -> TEMPERATURE -> SUPPLY and check that the
temperature rises.
28. Return to the menu MANUAL TEST and stop ADD.HEAT 1 by setting the value back to 0.
29. Repeat steps 26 to 28 for ADD.HEAT 2 and ADD.HEAT 3.
30. Stop the circulation pump by setting the value to 0.
Test fuse protection
31. Start the circulation pump by setting the value CIRC.PUMP to 1
32. Start the compressor by setting the value HEATPUMP to 1.
33. At the same time, start the auxiliary heating power stages available to check that the fuse protection can withstand full power
operation.
34. Stop the auxiliary heating power stages and the compressor by
setting the value back to 0.
35. Stop the circulation pump by setting the value to 0.
Test the outdoor unit for DHP-A, -AL
36. Start the defroster shunt by setting the value SHUNT DEFR to 1.
37. Start the fan at low speed by setting the FAN L value to 1.
Check that the fan runs at low speed.
38. Start the fan at high speed by setting the FAN H value to 1.
Check that the fan runs at high speed.
Adjust the heat pump settings to the applicable heating system, for
instance an underfloor heating or radiator system. The delta temperature must be at least 8°C above the heat pump. The delta temperature should be 3-5°C for the brine system. If none of the delta
temperatures are reached, the flow of the circulation pumps may
need adjusting depending on the applicable heating system.
Noise check
During transportation and installation there is a certain risk that the
heat pump can be damaged, components may move or get bent
and this can cause noise. Because of this it is important to check
the heat pump when it has been installed and is ready to be commissioned to ensure that everything seems in order. The heat pump
should be run in both heating and hot water modes to ensure that
there is no abnormal noise. While doing this, check that there is no
abnormal noise in other parts of the house.
Noise is produced from the outdoor unit when the fan is in operation, check during that manual operation that there is no disturbance in your own home as well as to any neighbours. A noise kit is
available for purchase for the outdoor unit for DHP-A 10 and 12 if it
is necessary to reduce the noise.
Select operating mode
Set the heat pump to the desired operating mode in the menu
INFORMATION -> OPERAT. If necessary, set certain parameters in
the control computer, such as ROOM and CURVE.
10.4 Installing the front cover
⚠⚠NOTE! Take care not to damage the front cover!
1. Align the upper section of the front cover with both the side
channels at the top of the unit and slide it carefully downwards
until it covers the entire front of the unit.
2. Tighten the screws.
Exit test operation
39. Set the value for MANUAL TEST to 0.
10.5 After start up
Remember that it takes time for the heat pump to
⚠⚠heat
NOTE!a cold
house. It is best to let the heat pump work at its
own pace and NOT raise or alter any values in the control
computer to try to heat it up more rapidly.
If there is an LP alarm in conjunction with installation
⚠⚠itNOTE!
usually means that there is air in the system. Normally the
alarm disappears after a few days. If the alarm does not stop
the brine circuit must be bled and topped up.
38
VMBMA502
11 Customer information
After installation and test operation, the customer must be
informed about their new heat pump installation. Below is a checklist regarding the information that the installer must give the customer:
• The model of the heat pump that has been installed
• Run through the Maintenance instructions and show what it contains
• Describe the various operating modes and what they mean
• Describe the most common alarms and corrective actions
• Demonstrate how to navigate the control computer and which
settings the customer can set themselves
• Demonstrate how to view history and operating times
• Show the pipe installation and go through the periodic maintenance actions that the customers must be aware of:
- recommended pressure on manometers
- fill the heating system
- exercise safety valves
- clean strainers
• Explain how the customer can fine adjust their existing heating
system according to the instructions in the maintenance instructions
• The applicable warranties
• Where is the customer to turn for servicing
• Finally, fill in the reference list at the back of the Maintenance
instructions.
VMBMA502
39
Service instructions
12 The heat pump
12.1 Function description
A heat pump utilises the free energy found in a natural heat source, such as rock, ground, ground water or air. The heat pump can be compared to a reversed refrigerator. In a refrigerator, heat is transferred from the inside of the refrigerator to the outside. In a heat pump the
heat that is stored in a heat source is transferred to the inside of the house. The heat pump uses the energy in the heat source and gives
back two to three times more heat energy than what it uses in electrical energy. The heat pump is, therefore, a very environmentally friendly and economical way of heating a house.
In order for the heat pump to be able to retrieve heating energy from the heat source and transfer it to the heating system of the house,
three separate fluid circuits are required.
The circuit that retrieves the heating energy from the heat source is called the brine circuit and it maintains a low outgoing temperature to
be heated by the heat source.
The next circuit is called the refrigerant circuit and is a closed circuit which takes the retrieves heating energy and transfers it to the last circuit, the heat transfer fluid circuit.
The heat transfer fluid circuit holds the fluid that circulates in the heating system of the house and transfers heating energy to the house or
heat pump’s water heater.
The figure below shows how the different circuits work together in the transfer of heating energy.
Heating system and
water heater
Heat transfer fluid circuit – is the circuit that contains
the water that transports the heat/energy to the heating
system and the water heater.
Condenser
Expansion valve/
pressure drop
Enclosed
refrigerant
Compressor/
pressure increasing
Refrigerant circuit – is the circuit that contains a chlorine
and freon free refrigerant which, inside the heat pump,
transfers the energy retrieved from the brine circuit
through evaporation, compression and condensation,
and supplies it to the heat transfer fluid circuit.
Brine circuit – is the circuit that contains an antifreeze
water based mix that obtains and transports energy from
the heat source to the heat pump. This circuit is also
known as the collector.
Evaporator
Brine
Rock, ground, ground
water or air
Figure 78: Function principles of a heat pump.
1 A fluid (brine) filled hose is lowered into a lake, buried in the ground or lowered into bedrock. The brine obtains energy from the heat
source by the fluid temperature in the hose being heated a few degrees by the surrounding heat source. The fluid filled hose is also
known as a collector.
2 The brine is guided into the heat pump’s evaporator. The enclosed refrigerant in the refrigerant circuit is forced to boil as the pressure
in the expansion valve drops and later evaporates to a gas in the evaporator. The energy produced during this process is released by
the slightly heated brine.
3 The refrigerant that now contains a large quantity of energy in the form of heat is transferred to the compressor, which both increases
its temperature and pressure.
4 The refrigerant then continues to the condenser. When condensing, the refrigerant supplies its heat energy to the heat transfer fluid
circuit. The refrigerant’s temperature decreases and returns to a liquid state.
5 The heat transfer fluid circuit transports the heat energy out to the water heater, radiator and the under floor heating system, which
heat up.
6 The refrigerant is then transported through the expansion valve where the pressure drops and the refrigerant starts to boil and then
the process starts again.
12.2 Components
The heat pump is a complete heat pump installation for heating and hot water. It has the market’s first compressor developed solely for
heat pumps. It has an integrated 180 litre water heater and auxiliary heating. TWS stands for Tap Water Stratificator. This technology results
in more effective heat transfer and more effective layering of the water in the water heater.
The heat pump is equipped with control equipment, which is controlled via a control panel.
Heat enters the house via a water borne heating system, a low temperature system. The heat pump supplies as much of the heat demand
as possible before auxiliary heating is engaged and assists.
The heat pump unit consists of five basic units:
40
VMBMA502
1 Heat pump unit
• Scroll compressor
• Stainless steel heat exchangers
• Circulation pumps for brine and heating systems
• Valves and safety equipment for cooling systems and corresponding electrical components.
3
5
2 Water heater
• 180 litres
• Internal anti-corrosion protection with copper or stainless steel
• It has an anode that does not require replacing, which means that it is maintenance-free
2
3 Exchange valve
• The heated water either passes through to the heating system or to the water heater depending on
whether heating or hot water is to be produced
4 Auxiliary heat
• 9 kW electric heating element (4.5 kW at 230 V 1N heat pump installation)
• Electric heating element control in maximum of three steps (five steps for 400 V 3N DHP-A, -AL models)
• Installed on the heating system’s supply line
• Covers the demand of extra energy if the heat pump’s capacity is exceeded
• Automatically connected if operating mode AUTO is selected.
5 Control equipment
• Control computer with graphic display
• Temperature sensors (outdoor, supply line, return line, brine and hot water)
• Room sensor (option)
The control equipment controls the heat pup unit’s included components (compressor, circulation pumps,
auxiliary heaters and exchange valve) and determines when to start and stop the pump as well as producing heat for the house or hot water.
4
1
Figure 79: Heat pump components.
12.3 Outdoor unit and defroster function, DHP-A, -AL models
The DHP-A and DHP-AL heat pumps are equipped with an outdoor unit that makes use of the energy in the air outdoors down to -20°C.
The outdoor unit has a coil where brine recovers free energy from the outside air. It also has a fan that increases the airflow through the
coil. During operation the coil is cooled by the energy exchange at the same time as the humidity causes it to become covered in frost.
DHP-A, AL models have an automatic function to defrost the coil using the produced heat energy. If necessary, a defrosting sequence starts
which means the following:
• The defrosting sequence starts when the temperature of the brine reaches its set parameter for defrosting.
• The compressor is stopped so that the defrosting sequence should not load the compressor unnecessarily. On the other hand the compressor is not stopped when it produces hot water because the water heater is cooled when defrosting. The fan on the outdoor unit is
stopped in conjunction with defrosting to shorten the time of defrosting.
• The shunt valve in the heat pump opens so that hot brine from the defrosting tank is mixed with the cold brine circulating to the outdoor unit. The mixture has a temperature of about 15°C.
• The fifteen degree heated brine melts the frost on the outside of the coil at the same time as the liquid is cooled.
• When the brine is no longer cooled to temperatures below 11°C the coil is sufficiently defrosted.
• The shunt valve closes the flow of hot brine from the defrosting tank.
• Operation returns to normal.
A DHP-A, -AL installation consists of three basic
units:
1 Heat pump unit
• Scroll compressor
• Stainless steel heat exchanger
• Circulation pumps for brine and heating systems
• Valves and safety equipment for cooling systems
and corresponding electrical components.
2 Water heater
• 180 litres
• Internal anti-corrosion protection with copper or stainless steel
• It has an anode that does not require replacing, which means that it is maintenance-free
• Defrosting tank containing heated brine for
defrosting the outdoor unit
2
3
3 Outdoor unit
• Heat exchanger
• Fan
1
Figure 80: DHP-AL components.
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41
12.4 Passive cooling function, DHP-C
Heat pump DHP-C is equipped with an extra heat exchanger to use the passive cooling effect from the brine. Because the temperature in
the collector (borehole or equivalent) is lower than the indoor temperature, the temperature difference can be exploited to cool the indoor
air. At the same time the collector is charged with energy before the cold periods of the year.
DHP-C is a complete installation for heating, hot water and passive cooling where the control automatically ensures that the desired indoor
climate is reached. Because the DHP-C uses the same pipe system for heating and cooling, it is important to use a temperature when cooling that does not cause condensation on the pipe system. (If the system is not adapted to it.) Use of fan convectors is recommended.
12.5 Speed control, Opti models
A heat pump requires optimum conditions in the heating system and brine circuit in order to be able to run as efficiently as possible. The
temperature difference between the heating system’s supply line and return line must be constant between 7–10°C. For the brine circuit a
temperature difference of 3°C between supply and return line applies. If the differences are greater or less, the heat pump is less efficient
and savings are lower.
A heat pump with speed controlled circulation pumps always ensures that they retain the temperature differences. The control equipment
detects if the balance is in jeopardy and increases or decreases the speed of the circulation pumps as necessary.
12.6 HGW technology, DHP-H Opti Pro
The HGW technique is a new and unique method for hot water heating, which is used in DHP-H Opti Pro. At the same time as the water
is heated to be distributed around the house heating system, a small proportion flows via an extra de-superheater, which heats the water
before it enters the water heater. The exchange valve that controls the flow between hot water and heating system is replaced with a shunt
(HGW shunt).
During heating production, the HGW shunt ensures that a flow over the de-superheater to the water heater. The flow through the shunt is
continuously regulated by the heat pump control by sending opening or closing pulses to the shunt.
12.7 Auxiliary heating, DHP-H, -L, -C
If the heat demand is greater than the heat pump’s capacity, the auxiliary heater engages automatically. The auxiliary heater is made up of
an electric heating element on the supply line that has two outputs, AUX. HEAT 1 and AUX. HEAT 2, and can be controlled in three steps.
For three phase, 400V 3N, installations:
• Step 1 = AUX. HEAT 1 = 3 kW
• Step 2 = AUX. HEAT 2 = 6 kW
• Step 3 = AUX. HEAT 1 + AUX. HEAT 2 = 9 kW
For single phase, 230V 1N, installations (not DHP-C):
• Step 1 = AUX. HEAT 1 = 1,5 kW
• Step 2 = AUX. HEAT 2 = 3 kW
• Step 3 = AUX. HEAT 1 + AUX. HEAT 2 = 4.5 kW
In the event of an alarm, the auxiliary heater engages automatically.
12.8 Auxiliary heating DHP-A, -AL
The auxiliary heater for 400V 3N heat pumps is made up of an electric heating element on the supply line that has three outputs, AUX.
HEAT 1, AUX. HEAT 2 and AUX. HEAT 3, and can be controlled in five steps:
• Step 1 = AUX. HEAT 1 = 3 kW
• Step 2 = AUX. HEAT 2 = 6 kW
• Step 3 = AUX. HEAT 1 + AUX. HEAT 2 = 9 kW
• Step 4 = ADD.HEAT 2 + ADD.HEAT 3 = 12 kW (only connected at switched off compressor)
• Step 5 = ADD.HEAT 1 + ADD.HEAT 2 + ADD.HEAT 3 = 15 kW (only connected at switched off compressor)
• Step +4 = ADD.HEAT 2 + ADD.HEAT 3 = 12 kW (compressor operation permitted)
• Step +5 = ADD.HEAT 1 + ADD.HEAT 2 + ADD.HEAT 3 = 15 kW (compressor operation permitted)
The two power steps, step 4 and step 5, cannot be activated when the compressor is running. There are further auxiliary heating steps: step
+4 and step +5, which means that these additional steps can be activated whilst the compressor is running. Step +4 and +5 must only be
selected on the condition that the building where the heat pump is installed has a large heating demand and the building’s electric installation is suitable for high current consumption.
The auxiliary heater for 230V 1N heat pumps is made up of an electric heating element on the supply line that has two outputs, AUX. HEAT
1 and AUX. HEAT 2, and can be controlled in three steps:
• Step 1 = AUX. HEAT 1 = 1,5 kW
• Step 2 = AUX. HEAT 2 = 3 kW
• Step 3 = AUX. HEAT 1 + AUX. HEAT 2 = 4.5 kW
In the event of an alarm, the auxiliary heater engages automatically.
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VMBMA502
12.9 Water heater, DHP-H, -C
Danfoss heat pumps DHP-H, -C, are supplied with an integrated 180 litre water heater.
1
7
8
2
Position
1
2
3
4
5
6
7
8
Name
Hot water line
Temperature sensors
Water heater
TWS coil
Start temperature sensor
Return from TWS coil
Filler pipe
Flow line to TWS coil
3
4
5
6
Figure 81: Water heater in DHP-H and DHP-C.
Hot water production is prioritised ahead of heat production, i.e. no heat is produced when there is a hot water demand at the same time.
The temperature of the hot water cannot be adjusted. Normally, hot water production does not cease at a determined temperature but
when the compressor’s operating pressure switch reaches its maximum operating pressure, which corresponds to a hot water temperature
of approximately 50-55°C.
Using a regular time interval, the water in the water heater is given extra heat by the integrated auxiliary heater to prevent the build up of
bacteria (anti-legionella function). The factory set time interval is seven days (can be adjusted). When the anti-legionella function is active
the heat pump produces hot water until the temperature for the start temperature sensor (5) has reached 60°. If the heat pump cannot
raise the temperature sufficiently within 3.5 hours the control checks if there is any heating requirement, before the anti-legionella function
tries again.
In the control computer’s TEMPERATURE menu, a number of measured and calculated temperatures for the hot water and supply are
displayed. The current hot water temperature (2) and the temperature of the supply line during heating and hot water production is displayed. The temperature of the supply line often exceeds the maximum permitted hot water temperature, but usually during hot water
production.
12.10 Water heater, DHP-A, -AL
The hot water heaters for DHP-A,-AL differ from the other heat pumps in that the function for defrosting of the outdoor unit is different.
The 180 litre hot water heater has a defrosting tank (mantle) on the outside of the heater that contains heated brine (approx 47 litres)
which is used during defrosting.
The difference between a DHP-A, -AL is only that the water heater is integrated in DHP-A and is a separate unit for DHP-AL.
1
6
2
7
8
3
4
Position
1
2
3
4
5
6
7
8
Name
Tap hot water
Temperature sensors
Defrosting tank
Water heater
TWS coil
Filler pipe
Flow line to TWS coil
Expansion outlet when outdoor
unit is positioned at high level
5
Figure 82: Water heater for DHP-A and DHP-AL.
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43
12.11 Important parameters
Heat production - calculating
The indoor temperature is adjusted by changing the heat pump’s heat curve, which is the control computer’s tool for calculating what the
supply temperature should be for water that is sent out in the heating system. The heat curve calculates the supply temperature depending on the outdoor temperature. The lower the outdoor temperature, the higher the supply temperature. In other words, the supply temperature of the water fed to the heating system will increase exponentially as the outside air temperature falls.
The heat curve will be adjusted in connection with installation. It must be adapted later on, however, to obtain a pleasant indoor temperature in any weather conditions. A correctly set heat curve reduces maintenance and saves energy.
CURVE
The control computer shows the value for CURVE by means of a graph in the display. You can set the heat curve by adjusting the CURVE value.
The CURVE value indicates the supply temperature of the water to be sent out to the heating system at an outdoor temperature of 0°C.
Supply temperature
Maximum supply temperature
Value for CURVE is 40...
Outdoor temperature
...at zero degrees
Figure 83: Graph showing the set value 40 for CURVE.
At outdoor temperatures colder than 0°C, supply water hotter than 40°C is sent out to the heating system and at outdoor temperatures
greater than 0°C, supply water cooler than 40°C is sent out.
Supply temperature
Maximum supply temperature
Outdoor temperature
Figure 84: Increasing or reducing the CURVE changes the slope of the curve
If you increase the CURVE value, the heat curve will become steeper and when you reduce it, it will become flatter.
The most energy efficient and cost effective setting is achieved by changing the CURVE value to adjust the temperature in the house to an
even and constant temperature. For a temporary increase or reduction, adjust the ROOM value instead.
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VMBMA502
ROOM
If you wish to increase or reduce the indoor temperature, change the ROOM value. The difference between changing the ROOM value and
the CURVE value is that the system’s heat curve does not become steeper or flatter if the ROOM value is changed, which the curve becomes
if the CURVE value changes, instead the entire heat curve is moved by 3°C for every degree change of the ROOM value. The reason that the
curve is adjusted 3° is that an approximate 3° increase in supply temperature is needed to increase the indoor temperature 1°.
Supply temperature
Maximum supply temperature
Outdoor temperature
Figure 85: Changing the ROOM value changes the heat curve upwards or downwards.
The relationship of the supply temperature to outdoor temperature will not be affected. The supply temperature will be increased or
reduced by the same number of degrees all along the heat curve. I.E. the entire heat curve rises or drops instead of the curve gradient
changing.
This method of adjusting the indoor temperatures can be used for a temporary raise or drop. For long term increases or reductions of the
indoor temperature, the heat curve is adjusted instead.
Sometimes, at outdoor temperatures between -5°C and +5°C, part of the heat curve may need adjusting if the indoor temperature is not
constant. For this reason, the control system includes a function adjusting the curve at three outdoor temperatures: -5°C, 0°C and +5°C.
This function will allow you to increase or reduce the supply temperature, without affecting the heat curve, at three specific outdoor temperatures. If, for example, the outdoor temperature is -5°C, the supply temperature will change gradually between 0°C and -10°C, maximum
adjustment being reached at -5°C. The figure below displays the adjusted CURVE -5. The adjustment can be seen on the graph in the form
of a bump.
Supply temperature
Local higher supply temperature at -5°
Outdoor temperature
Figure 86: The adjusted curve at -5°C
You can choose to adjust the heat curve individually at three specified outdoor temperatures: -5°C, 0°C and +5°C. The supply temperature
can be changed by plus/minus 5 degrees.
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45
HEATSTOP
The HEATSTOP function automatically stops all production of radiator heat when the outdoor temperature is equal to, or higher than, the
value entered for heat-stop.
When the heat-stop function is activated, the circulation pump will be turned off - except when hot water is being produced. The circulation pump will be “exercised” for 1 minute per day. The factory set value for activating heat-stop is an outdoor temperature of 17°C. If the
heat-stop function is active, the outdoor temperature must drop 3°C when setting, before the heat-stop stops.
MIN and MAX
The MIN and MAX values are the lowest, respectively highest set point values that are allowed for the supply temperature.
Adjusting the minimum and maximum supply temperatures is particularly important if your home has under floor heating.
If your house has under floor heating and parquet floors, the supply temperature must not exceed 45°C. Otherwise there is a risk that the
parquet floors might be damaged. If you have under floor heating and stone tiles, the MIN value should be 22-25°C, even in summer when
no heating is required. This is to achieve a comfortable floor temperature.
If your house has a basement, the MIN value should be adjusted to a suitable temperature for the basement in summer. A condition for
maintaining the heat in the basement in the summer is that all radiators have thermostat valves that switch off the heat in the rest of the
house. It is extremely important that the heating system and the radiator valves are trimmed correctly. As it is usually the end customers
themselves who have to carry out trimming, remember to inform them how to carry it out correctly. Also remember that the value for
HEATSTOP needs adjusting upwards for summer heating.
TEMPERATURES
The heat pump can display a graph showing the history of the various sensors’ temperatures and you can see how they have changed over
60 measurement points in time. The time interval between the measurement points can be adjusted between one minute and one hour,
factory setting is one minute.
History is available for all sensors, but only the set value is shown in the display for the room sensor. The integral value that may appear is
the heating system’s energy balance.
INTEGRAL
The heat demand in the house depends on the season and weather conditions and is not constant. The heat demand can be expressed as
temperature difference over time and can be calculated giving an integral value as a result (heat demand). To calculate the integral value,
the control computer uses several parameters.
A heat deficit is needed to start the heat pump, and there are two integral values, A1 and A2, which start the compressor and auxiliary
heater. During heat production, the deficit reduces and when the heat pump stops, the inertia in the system causes a surplus of heat.
The integral value is a measurement of the surface under the time axis and is expressed in degree minutes. The figure below shows the factory settings for the integral values that the heat pump has. When the integral value has reached the set value for INTEGRAL A1, the compressor starts and if the integral value does not drop but continues to rise, the auxiliary heater starts when the integral value has reached
the set value for INTEGRAL A2.
INTEGRAL A1
INTEGRAL A2
INTEGRAL A1
INTEGRAL A2
Integral
(Heat
demand)
Heat surplus
Heat surplus
Heating deficit
(≥0)
Compressor start
Time
Compressor stop
Compressor start
(-60)
(-60)
Auxiliary heater start
Auxiliary heater stop
Auxiliary heater start
(-660)
(latest at -60)
(-660)
Auxiliary
heater
No operation
Auxiliary
heater
Compressor
No operation
Compressor
Heat pump
operation
Figure 87: Starting and stopping heat pump operation based on integral values.
The integral value calculation stops during hot water production and during heatstop. Integral value calculation resumes two minutes after
completed hot water production to give the heating system time to stabilise the temperature.
More specific conditions for starting and stopping the heat pump are described in the “Operating conditions” chapter.
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VMBMA502
HYSTERESIS
In order to start the heat pump in advance during sudden changes of the heat demand, there is a value, HYSTERESIS, which controls the
difference between the actual supply temperature, t1 and the calculated supply temperature, t2. If the difference is the same or greater than
the set HYSTERESIS value (x), i.e. there is a heat demand, or the heat demand disappears, quicker than the usual integral calculation, the
integral value is forced to either the start value INTEGRAL A1 or to the stop value 0°min.
t1
t2
SUPPLY TEMP.
HYSTERESIS
(∆t) ≥ x
HYSTERESIS
(∆t) ≥ x
Compressor start
INTEGRAL
(-60)
TIME
Compressor stop
(0)
Figure 88: Conditions for HYSTERESIS to force the integral value to change.
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47
DEFR CURVE, defrosting curve for DHP-A, -AL
To start defrosting the outdoor unit for DHP-A, -AL, the control computer makes a calculation using the temperature of the brine return
and the outdoor temperature.
What guides the calculation is a linear defrosting curve that can be set so that the heat pump and outdoor unit work optimally. The setting
of three different values can be changed: DEFR CURVE 0, DEFR CURVE –20 and OUTDOOR STOP. The defrosting sequence starts when the
temperature of the brine return reaches the set parameter value at an outdoor temperature somewhere along the set defrosting curve.
The two parameters that are mainly changed are DEFR CURVE 0 and DEFR CURVE -20. The numbers behind the DEFR CURVE display what
outdoor temperature the setting is for, that is to say at 0°C for DEFR CURVE 0 and -20 for DEFR CURVE -20. The value -20 for DEFR CURVE -20
is the set value for OUTDOOR STOP, so if the value for OUTDOOR STOP changes, the numbers behind DEFR CURVE also change.
Factory setting for OUTDOOR STOP is -20°C. At this outdoor temperature, compressor operation is stopped and the addition takes over. It is
seldom that the value of OUTDOOR STOP needs to be changed, tests and operating cases have shown that -20°C operates very well as the
stop temperature. In the text and figures below the value -20°C has been used for OUTDOOR STOP.
The control computer shows the value for DEFR CURVE 0 and DEFR CURVE –20 by means of a graph in the display.
Temperature, input brine line
Adjustable interval for DEFR CURVE 0 is
a brine return between -5°C and -15°C
at 0°C outdoor temperature
Set value for
DEFR CURVE -20
Outdoor temperature
Figure 89: Graph that shows how the value for DEFR CURVE 0 can be set.
The value for OUTDOOR STOP that is set means that the compressor will no longer be used for heating or hot water production if the
outdoor temperature is the same as or lower than the value. Heating and hot water production then occurs with the help of the auxiliary
heater.
The value for DEFR CURVE 0 is the temperature that the brine return is permitted to reach when a defrost must start at outdoor temperature 0°C.
In the corresponding way the value for DEFR CURVE -20 is the temperature that the brine return has when a defrost should start at the
set outdoor temperature for OUTDOOR STOP. The setting for DEFR CURVE –20 means that the value OUTDOOR STOP (-20°C) is reduced by
between 1 and 8 degrees. This also determines how much lower the temperature for the brine return may be than -20°C in this case.
Temperature, input brine line
Set value for
DEFR CURVE 0
Adjustable value for DEFR CURVE -20 is
1°C to 8°C lower than OUTDOOR STOP
Outdoor temperature
Set value for OUTDOOR STOP, -20°C
Figure 90: Graph that shows how the value for DEFR CURVE -20 can be set.
These three settings together create the defrosting curve and all three values have an effect on when defrosting will start, even if it is mainly DEFR CURVE 0 and DEFR CURVE -20 that is changed.
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VMBMA502
13 Control computer
13.1 Function description
A control computer is used to automatically calculate the heat demand in the house where the heat pump is installed and to ensure that
the correct amount of heat is produced and emitted where necessary. There are many different values (parameters) that must be referred
to during the calculation of the heat demand. During installation use the control computer to set and change certain values that have to
be adapted according to the house demand. The control computer is also used during service to view alarms and history, and to check the
value settings. The display window, keypad and an indicator are on the front of the control computer. It consists of a simple menu system
that is used to navigate the desired settings and values.
ROOM
20°C
(20°C)
NO
DEMAND HEAT
OPERAT. AUTO
The symbols in the display are
only examples. Certain symbols cannot be displayed at
the same time.
Figure 91: Display, control buttons and indicator for the heat pump.
Use the four control buttons on the keypad to navigate the menus and increase or reduce the set values:
• An up button with a plus sign
• A down button with a minus sign
• A right button with a right arrow
• A left button with a left arrow
The display always shows the set ROOM value and the status of the heat pump.
There are two main menus that are used to affect the heat pump settings. The menus are designed for two categories of user, end customers and installers, who make different settings in the control computer. For this reason the service menu is hidden from end customers.
INFORMATION
SERVICE
Figure 92: The menus are reached via different button presses.
The main menu, INFORMATION, is opened by pressing the left or right buttons. From the INFORMATION menu you can open the sub menus
to make settings for the heat pump.
For installation or service, the hidden main menu, SERVICE, is used. This is opened by holding the left button depressed for five seconds.
From the service menu you can open sub menus to make advanced settings.
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49
13.2 Display
The display of the control computer shows information about the heat pump’s operation, status and any alarms, in text form. The status,
indicated by symbols, is also shown in the lower section which shows the heat pump’s active process.
Operating mode
Appears with applicable heat pump operating status text.
Operating mode
Meaning
The installation is fully switched off.
(OFF)
that if the operating mode OFF is to be used for long periods during
⚠⚠the
Remember
winter, the water in the heating system in the installation must be drained,
otherwise there is a risk of frost damage.
AUTO
The heat pump and the auxiliary heater are automatically controlled by the control computer.
HEATPUMP
The control computer is controlled so that only the heat pump unit (compressor) is allowed to
operate. In this operating mode peak heating charging (legionella function) of the hot water
will not be run because additional heat must not be used.
ADD. HEAT
The control computer only permits the auxiliary heater to be in operation. This operating
mode can be used when a new installation is being used, when the brine system is not ready
for operation.
HOT WATER
In this mode the heat pump only produces hot water, no heat goes to the heating system.
Symbols
Displays the operating status of the heat pump using symbols.
Symbol
F
Meaning
HP
Indicates that the compressor is in operation.
LIGHTNING
Indicates that the auxiliary heater is in operation. Number of auxiliary power stages indicated
by digit.
HOUSE
Indicates that the 3-way valve position is for heat production for the house.
TAP
Indicates that the 3-way valve’s position is for hot water production.
FLOW
GUARD
An “F” next to the symbol indicates that a flow guard is installed.
CLOCK
Indicates that tariff control is active.
TANK
Indicates the level of hot water in the water heater. During charging, the tank is filled and filling starts at the set start temperature. A lightning symbol by the symbol indicates peak heating charging (legionella function).
SQUARE
Either indicates that the operating pressure switch has deployed, or that the hot gas temperature has reached its maximum temperature.
DEFROST
Displayed if defrosting is active. (DHP-A, -AL)
FAN
Displayed if the fan is active L=Low speed and H= High speed. (DHP-A, -AL)
COOLING
Indicates Cooling. A indicates active cooling.
Text
Appears with applicable heat pump operating status text.
Message
Meaning
ROOM
Shows the set ROOM value. Standard value: 20°C.
If the accessory room sensor is installed it shows the actual temperature and the desired
indoor temperature within brackets.
ERR PHASE SEQ.
Alarm that indicates that there is an incorrect phase sequence to the compressor. Only display and only the first 10 minutes.
HIGH RETURN
Alarm that indicates that the high return temperature prevents the compressor’s operation.
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VMBMA502
Message
Meaning
START
Indicates that there is a demand for heating production and that no start delay is active.
EVU STOP
Indicates that the additional function EVU is active. This means that the heat pump is off as
long as EVU is active.
NO DEMAND HEAT
Indicates that there is no heating production demand.
HIGHPRESS ERROR
Alarm that indicates that the high pressure switch has deployed.
LOWPRESS ERROR
Alarm that indicates that the low pressure switch has deployed.
MOTOR P ERROR
Alarm that indicates that the motor protection has deployed.
BRINEFLOW LOW
Appears if the accessory flow switch is installed. Alarm that indicates that the flow in the
brine system is low.
SENSOR
Alarm that indicates a faulty sensor.
HEATPUMP START --MIN
Indicates that there is a heating production demand and will start in the specified number
of minutes.
HEATPUMP+ADD.HEAT
Indicates that heat production is active with both compressor and auxiliary heater.
START_MIN
Indicates that there is a demand for heating production but that a start delay is active.
ADD. HEAT
Indicates that there is an auxiliary heater demand.
COOLING
Displayed if cooling is passive.
COOLING A
Displayed if cooling is active.
DEFROST
Displayed if defrosting is active. (DHP-A, -AL)
VMBMA502
51
14 Menus
14.1 Main menu INFORMATION
This menu is used to change the heat pump’s operating modes and adjust the heat curve. History and operating times can also be viewed
here. Open the menu by pressing the left or right button. The sub menus available in the INFORMATION menu are shown in the following
table:
Main menu
Sub menu
Selection/settings
INFORMATION
OPERATION
Ø
AUTO
HEATPUMP
ADD. HEAT
HOT WATER
MANUAL TEST
HEATCURVE
CURVE
MIN
MAX
CURVE +5
CURVE 0
CURVE -5
HEATSTOP
REDUCTION
ROOM FACTOR
POOL
POOL HYSTERESIS
HEAT CURVE 2 (Expansion card)
CURVE 2
MIN
MAX
TEMPERATURE
OUTDOOR
ROOM
Supply line
Return line
HOT WATER
INTEGRAL
BRINE OUT
BRINE IN
POOL
SHUNTGROUP
COOLING
CURRENT
OPERAT.TIME
HEATPUMP
ADD. HEAT 1
ADD. HEAT 2
ADD. HEAT 3
HOT WATER
COOLING
COOLING A
DEFROST (Defrost card)
DEFROSTS
BETW. 2 DEFR
TIME SINCE DEFROST
FAN H OFF AT
DEFROST CURVE
MANUEL DEFR
Menus in italics are only visible if the expansion card or defrosting card (DHP-A, -AL) is installed.
52
VMBMA502
Sub menu INFORMATION -> OPERATION
Used to select operating mode.
Menu selection
Meaning
Factory setting
The installation is off. Any active alarms reset.
-
AUTO
Automatic operation with both heat pump and auxiliary heater permitted. If the
number of power stages for auxiliary heating are set to zero (SERVICE -> AUX.
HEAT -> MAX STAGE) only AUTO or OFF can be selected as operating mode.
-
HEATPUMP
Operation with only heat pump permitted. NOTE! No peak heating charging
(legionella function) with only heat pump operation.
-
ADD. HEAT
Operation with only auxiliary heater permitted.
-
HOT WATER
Operation with heat pump for hot water production and auxiliary heater during
peak heating charging (legionella function).
-
MANUAL TEST
Only appears when MANUAL TEST in the SERVICE menu is active. Outputs controlled manually.
-
(OFF)
Sub menu INFORMATION -> HEAT CURVE
Used to change settings for the heat curve.
Menu selection
Meaning
Factory setting
CURVE
Calculated supply temperature at 0°C outdoor temperature. Shown as a graph
that also shows MIN and MAX values.
40°C
(during under floor heating 30°C)
(interval: 22°C / 56°C)
MIN
Minimum permitted supply temperature, if the temperature for heat-stop has
been reached and the heat pump has stopped.
10°C
(interval: 10°C / 50°C)
MAX
Maximum permitted supply temperature.
55°C
(during under floor heating 45°C)
(interval: 40°C / 85°C)
CURVE 5
Local increase or reduction of CURVE at an outdoor temperature of +5°C. Shown
in the graph for CURVE.
0°C (interval: -5°C / 5°C)
CURVE 0
Local increase or reduction of CURVE at an outdoor temperature of 0°C. Shown
in the graph for CURVE.
0°C (interval: -5°C / 5°C)
CURVE -5
Local increase or reduction of CURVE at an outdoor temperature of -5°C. Shown
in the graph for CURVE.
0°C (interval: -5°C / 5°C)
HEATSTOP
Maximum outdoor temperature when heat production is permitted.
17°C
(interval:
If HEAT STOP applies, the outdoor temperature must drop 3°C below the setting
before HEAT STOP stops.
, 0°C / 40°C)
REDUCTION
Only appears if the tariff control function has been activated. Lowering set room
temperature. Active at 10 kohm connection at EVU input.
2°C (interval: 1°C / 10°C)
ROOM FACTOR
Only displayed if an accessory Room temperature sensor is installed.
2 (interval: 0 / 4)
(0 = no impact,
4 = large impact)
Determines how large an impact the room temperature is to have when calculating the supply temperature. For underfloor heating we recommend a setting
between 1-3 and for radiator heating between 2-4.
POOL
(Expansion card)
Only appears if POOL is selected. The temperature in the pool is controlled by a
separate sensor regardless of the heating and hot water system.
20°C
(interval:
POOL HYSTERESIS
(Expansion card)
Only appears if POOL is selected. In simple terms, the POOL HYSTERESIS is the
temperature interval between start and stop for pool heating. If the difference
between the actual supply temperature to pool and the calculated supply temperature is too great, either the integral value is set to start value A1 (the heat
pump starts) or the value is set to 0 (stops the heat pump).
2°C (interval: 1°C / 10°C)
VMBMA502
, 5°C / 40°C)
53
Sub menu INFORMATION -> HEAT CURVE 2
The menu is active if the expansion card is installed and only appears if shunt group sensor is connected and activated in menu SERVICE ->
INSTALLATION -> SYSTEM -> SHUNTGROUP (Expansion card). Used to change settings for heat curve 2.
Menu selection
Meaning
Factory setting
CURVE 2
Calculated shunt group temperature at 0°C outdoor temperature. Shown as a
graph that also shows MIN and MAX values.
40°C
(interval: 22°C / 56°C)
MIN
Minimum permitted shunt group temperature, if the temperature for heat-stop
has not been reached.
10°C
(interval: 10°C / 50°C)
MAX
Maximum permitted shunt group temperature.
55°C
(interval: 15°C / 70°C)
Sub menu INFORMATION -> TEMPERATURE
Used to indicate the prevailing temperatures, history and set/calculated values. History can be accessed to view all the values by pressing
the right arrow to present a graph of the last 100 measurement points for the set time interval (SERVICE -> INSTALLATION -> LOGTIME). In
the event of an alarm, history stops being logged until the alarm is reset by changing the operating mode to OFF.
Menu selection
Meaning
Factory setting
OUTDOOR
Shows the actual outdoor temperature.
-
ROOM
Shows the actual set temperature.
-
Supply line
Shows the actual supply temperature. The calculated supply temperature to the
heating system group is within brackets.
-
During hot water production in operating mode ADD.HEAT the value for HOT
WATER STOPP + 5° is shown within brackets.
Return line
Shows the actual return temperature. The stop temperature, MAX RETURN is
within brackets.
-
HOT WATER
Shows the actual hot water temperature.
-
INTEGRAL
Shows the actual calculated value for integral.
-
BRINE OUT
Shows the actual temperature for brine out.
-
BRINE IN
Shows the actual temperature for brine in.
-
POOL
(Expansion card)
Only appears if POOL is selected. Shows the actual pool temperature. The set
pool temperature is shown in brackets.
-
SHUNTGROUP
(Expansion card)
Only appears if SHUNTGROUP is selected. Shows the actual supply temperature.
The calculated supply temperature to the shunt group is within brackets.
-
COOLING
(Expansion card)
Only appears if COOLING is selected. Shows the actual supply temperature. The
set point value is shown in brackets.
-
CURRENT
(Expansion card)
Only appears if CURRENT LIMITER is selected. Shows the actual current consumption. The set value for MAX CURRENT is shown between brackets.
-
Sub menu INFORMATION -> OPERAT. TIME
Used to show the operating time for each component. Time given in hours.
Menu selection
Meaning
Factory setting
HEATPUMP
ADD. HEAT 1
ADD. HEAT 2
ADD.HEAT 3
(Defrost card)
HOT WATER
COOLING
(Expansion card)
COOLING ACTIVE
(Expansion card)
Compressor operating time for both heating and hot water production.
Operating time auxiliary heater power stage 1 with full output 3 kW (VL).
Operating time auxiliary heater power stage 2 with full output 6 kW (VL).
Operating time auxiliary heater power stage 3 with full output 6 kW (VL).
-
Operating time hot water with compressor.
Operating time passive cooling.
-
Operating time active cooling.
-
54
VMBMA502
Sub menu INFORMATION -> DEFROST (DHP-A, -AL)
The menu applies to DHP-A, -AL with defroster card and only appears if OUTDOOR AIR in the SERVICE -> INSTALLATION -> SYSTEM -> HEAT
SOURCE menu is selected. Used to obtain information about outdoor unit defrosting and to make certain settings.
Menu selection
Meaning
Factory setting
DEFROSTS
BETW. 2 DEFR
TIME SINCE DEFROST
FAN H OFF AT
Total number of defrosts carried out.
The operating time of the compressor in minutes between the 2 last defrosts.
The operating time of the compressor in minutes since last defrost.
Fan high speed is deactivated at this temperature and low speed is activated.
DEFROST CURVE
Here, the angle of the defrost curve can be changed using the right-hand arrow
and by either pressing +  or – (Change the start temperature for defrost).
By using the right-hand arrow + or -, defrost can be started manually (shunts
+20°C for 10 minutes).
12°C
(interval: 10°C / 20°C)
-10°C
(interval: -13°C / -7°C)
0 (interval: 0 / 1)
MANUEL DEFR
VMBMA502
55
14.2 Main menu SERVICE
This menu is for use during installation and service to optimise and adjust the operation of the heat pump. Access the menu by holding the
left arrow in for five seconds. The sub menus available in the SERVICE menu are shown in the following table:
Menu
Sub menu
SERVICE CONT’D.
Selection/
settings
DEFROST
DEFR CURVE 0
DEFR CURVE -XX
DEFR TEMPERATURE
STOP DEFR
UNDER 5°C DEFR
MIN TIME DEFROST
DEFROST SENSOR
SERVICE
HOT WATER
START
HOT WATER TIME
HEATING TIME
TOPH. INTERVAL
TOPH. STOP
INFL. START SEN.
WEIGHT HOT WATER
OPTIMUM
TEMP DIFF CIRC.
TEMP DIFF BRINE
START FLOW CIRC.
START FLOW BRINE
CONST.FL.CIRC
CONST.FL.BRINE
MIN FLOW CIRC.
MAX HW
MIN HW
HEAT PUMP
INTEGRAL A1
HYSTERESIS
MAX RETURN
START INTERVAL
ALARM BRINE
PRESS. PIPE
OUTDOOR STOP
SHUNT COOLING
HGW
HGW TEMP
TEMP DIFF
HOT WATER DIFF
HOT WATER TO RAD
MAX TEMP
START HGW
INITIALIZING HGW
INTEGRAL DELAY
HGW-SHUNT TIME
HGW INT. BOUND.
HGW INTEGRAL
PULSE WIDTH
PULSES
AUX. HEATER
INTEGRAL A2
HYSTERESIS
MAX STEP
MAX CURRENT
SHUNT TIME
HOT WATER STOP
MANUAL TEST
MANUAL TEST
HEAT PUMP
BRINE PUMP
CIRC. PUMP
REV.V. HOT WATER
SHUNT 1
AUX. HEAT 1
AUX. HEAT 2
AUX. HEAT 3
SHUNT DEFR
FAN L
FAN H
EXT. AUX. HEATER
ALARM
SHUNT COOLING
SHUNT GROUP
HGW-SHUNT
PASSIVE COOLING
ACT COOLING
REV. V. POOL
INSTALLATION
ENGLISH
SYSTEM
HEAT SOURCE
HEATING SYSTEM
COOLING
POOL
SHUNT GROUP
ADDITION
SERVICE TIME
FACTORY SET
RESET OPER. TIME
SENSOR CALIBRATION
VERSION
LOG TIME
BRINE TIME ON
BRINE TIME OFF
TOPH. TIME
TOPH. TIME D
56
VMBMA502
Sub menu SERVICE -> HOT WATER
Used to change the settings for hot water production.
Menu selection
Meaning
Factory setting
START
Start temperature for hot water production. Shows the actual hot water temperature and the value within brackets indicates the start temperature.
( = no sensor alarm)
40°C
(interval:
HOT WATER TIME
Time for hot water production during combined hot water and heating demand,
in minutes.
40M (up to 8kW)
20M (10kW and more)
(interval: 5M / 40M)
HEATING TIME
Time for hot water production during combined heating and hot water demand,
in minutes.
20M (interval: 5M / 40M)
TOPH. INTERVAL
Time interval between peak heating charging, legionella function, in days.
7D
(interval:
TOPH. STOP
Stop temperature for peak heating charging (applies to VL system).
60°C
(interval: 50°C / 65°C)
INFL. H.W SENSOR
Water heater sensor’s influence compared with the peak sensor’s at start of
water heating.
65%
(interval: 0% / 100%)
WEIGHT HOT WATER
The calculated value of the hot water sensor directed towards the peak sensor.
-
, 30°C / 55°C)
, 1D / 90D)
Sub menu SERVICE -> HEATPUMP
Used to change the heat pump’s operating settings.
Menu selection
Meaning
Factory setting
INTEGRAL A1
The integral’s value for starting the heat pump. See section 12.9 for further information.
60
(interval: 5 / 250)
HYSTERESIS
If the difference between the actual supply temperature and the calculated supply temperature is too great either the integral value is set to start value A1 (the
heat pump starts) or the value is set to 0 (stops the heat pump). See section 12.9
for further information.
10°C (at OUTSIDE AIR
temperature of 12°C)
(interval: 1°C / 15°C)
MAX RETURN
Stop temperature at high return from the heating system.
55°C
(interval: 30°C / 70°C)
STARTINTERVAL
Minimum tine interval between two heat pump starts in minutes.
20M
(interval: 10M / 30M)
ALARM BRINE
Not shown if OUTSIDE AIR is selected as heat source. Alarm temperature for supply brine (brine out), which stops the heat pump. ( = no sensor alarm)
(interval:
10°C)
PRESSURE PIPE
Sensor on the compressor’s hot gas line. Value within brackets indicates maximum permitted temperature. If this value is exceeded, the compressor will stop
and start again as soon as the temperature has dropped. No alarm shown in the
display, however, a square is shown in the left, lower corner of the display.
130°C
(interval: 100°C / 160°C)
OUTDOOR STOP
Only appears if OUTSIDE AIR is selected. Lowest outdoor temperature when the
outdoor sensor stops the compressor and heating or hot water is instead produced with the auxiliary heater.
-20°C
(interval: -20°C / -1°C)
SHUNT COOLING
(Expansion card)
Set point value for cooling. Desired temperature for supply line.
18°C (interval: 0°C / 30°C)
VMBMA502
, ‑14°C /
57
Sub menu SERVICE -> ADD. HEAT
Used to change the heat pump stage’s operating settings.
Menu selection
Meaning
Factory setting
INTEGRAL A2
Two conditions must be fulfilled in order to start the auxiliary heater: the integral’s value to start must be less than integral A1 + A2, and the supply temperature must be 2° lower than the calculated temperature.
600 (interval: 50 / 990)
HYSTERESIS
If the difference between the actual supply temperature and the calculated supply temperature is too great either the integral value is set to start value A1 + A2
(the addition starts) or the value is set to 0 (stops the addition).
20°C (interval: 5°C / 30°C)
MAXSTEP
Maximum number of permitted steps for auxiliary heating.
2 (at AIR 5)
(interval: , 1 / 3)
(interval at OUTSIDE AIR:
, 1 / 5)
0 = no auxiliary heating permitted (Means that only AUTO or
and that legionella operation is not possible.)
can be selected
MAX CURRENT
(Expansion card)
Refers to main fuse in the unit, in amperes.
20 (interval: 16 / 35)
Menu selection
Meaning
Factory setting
SHUNTTIME
Minimum time interval between signals to shunt motor to affect the supply tem- 60S (interval: 10S / 99S)
perature, in seconds. Applies to all connected shunt groups (applies to system D
or VLD).
HOT WATER STOP
Stop temperature for hot water during ADD. HEAT operation (applies to the VL
system). The value is read off by the hot water sensor.
60°C
(interval: 50°C / 65°C)
Sub menu SERVICE -> MANUAL TEST
Used to manually test and test operate the heat pump’s components or signal outputs.
Menu selection
Meaning
Factory setting
MANUAL TEST
Setting options for manual test.
-
0 = deactivate manual test
1 = activate manual test
2 = activate manual test with option of navigating from the SERVICE menu to
check that the temperatures rise.
HEATPUMP
0 = stop heat pump, does not stop started brine pump
1 = start heat pump, also starts brine pump.
-
NOTE! The heat pump cannot be started in the event of an active alarm.
BRINEPUMP
0 = stop brine pump
1 = start brine pump
-
CIRC: PUMP
0 = stop circulation pump
1 = start circulation pump
-
VXV HOT WATER
0 = heating mode for 3-way valve
1 = hot water mode for 3-way valve
-
SHUNT 1
- = closes shunt (applies to D-system)
0 = shunt unaffected
+ = opens shunt (applies to D-system)
-
ADD. HEAT 1
0 = stop auxiliary heat step 1
1 = start auxiliary heat step 1
-
ADD. HEAT 2
0 = stop auxiliary heat step 2
1 = start auxiliary heat step 2
-
ADD. HEAT 3 (DHP-A, -AL)
(Defrost card)
0 = stop auxiliary heat step 3
1 = start auxiliary heat step 3
-
SHUNT DEFR (DHP-A, -AL)
(Defrost card)
- = opens flow from the defrost tank
0 = shunt unaffected
+ = closes the flow from the defrost tank
-
FAN L
(Defrost card)
0 = stop fan
1 = start fan with low speed
-
FAN H
(Defrost card)
0 = stop fan
1 = start fan with high speed
-
ADD.HEAT EXT (DHP-A,
-AL)
(Defrost card)
0 = 0V on terminal block 283
1 = control voltage 230V on terminal block 283
-
58
VMBMA502
Menu selection
Meaning
Factory setting
ALARM
(Expansion card)
0 = stop signal on output External alarm
1 = start signal on output External alarm
-
SHUNT COOLING
(Expansion card)
- = shuts shunt
0 = shunt unaffected
+ = opens shunt
-
SHUNTGROUP
(Expansion card)
- = shuts shunt
0 = shunt unaffected
+ = opens shunt
-
COOLING PASSIVE
(Expansion card)
0 = stop passive cooling
1 = start passive cooling (brine pump starts and shunt cooling regulates to set
point value)
-
HGW-SHUNT
(DHP-H Opti Pro)
- = shuts shunt
0 = shunt unaffected
+ = opens shunt
-
COOLING ACTIVE
(Expansion card)
0 = stop active cooling
1 = start active cooling (brine pump and compressor starts, shunt cooling regulates to set point value)
-
VXV POOL
(Expansion card)
0 = normal mode for exchange valve
1 = pool mode for exchange valve
-
0-10V
(Expansion card)
For any future demands.
-
Sub menu SERVICE -> INSTALLATION
Used for settings that are set during installation
Menu selection
Meaning
Factory setting
SWEDISH
Language setting for the control computer.
SWEDISH
(SVENSKA
NORSK,
SUOMI,
DEUTSCH,
NEDERLANDS,
ENGLISH,
FRANCAIS
POLSKI
DANSK)
SYSTEM
NOTE! The menu selection in the SYSTEM menu
varies depending on the
selected values. Tip: start
in the top menu and
work downwards.
Sub menu SERVICE -> INSTALLATION -> SYSTEM:
Menu selection
Meaning
HEAT SOURCE
GROUND OR ROCK
OUTSIDE AIR
Menu selection
Meaning
DIRECT EVAPURATION
BRINE SOLUTION
HEATING SYSTEM
VL-SYSTEM
D-SYSTEM
VLD-SYSTEM (appears if OUTSIDE AIR is selected)
COOLING
(Expansion card)
PASSIVE COOLING: /EXTERNAL/INTEGRATED IN HP
ACT COOLING: /EXTERNAL
ROOM SENSOR: 0/1 (Appears if room sensor is installed)
(0=controls to a constant value, 1=controls to the value that the room sensor has)
(The menu option INTEGRATED IN HP only applies to the DHP-C* heat pump)
POOL
(Expansion card)
ON /
Does not appear if SHUNT GROUP is selected.
SHUNTGROUP
(Expansion card)
ON /
ADD. HEAT
0-10V: / EXTERNAL ADDITIONAL HEATER (Expansion card)
FLOW SENSOR: ON /
CURRENT LIMITER: ON / (Expansion card)
PHASE FAULT: / PHASE READING
When ON, HEAT CURVE 2 is activated in the INFORMATION menu. Not displayed if
POOL is selected.
VMBMA502
59
Menu selection
Meaning
Factory setting
SERVICETIME
NOTE! Only used for test operation. Simulates time 60 times as fast, which
means that the waiting times are eliminated during test operation.
-
0 = deactivates SERVICETIME
1 = activates SERVICETIME which speeds up the control computer’s integral calculation and start delay by 60 times.
FACTORY SET
0 = starting point, the value returns to zero after a change
R = reset factory settings for radiator system
G = rest factory settings for under floor heating
-
RESET OPERAT. TIME
0 = no reset of operation times
1 = reset operation times to zero
-
CALIBRATION SENSOR
Following sensors are in the installation:
VERSION
OUTDOOR
Supply line
Return line
HOT WATER
BRINE OUT
BRINE IN
DEFR SENSOR
0 (interval: -5°C / 5°C)
0 (interval: -5°C / 5°C)
0 (interval: -5°C / 5°C)
0 (interval: -5°C / 5°C)
0 (interval: -5°C / 5°C)
0 (interval: -5°C / 5°C)
-5°C (interval: -5°C / 5°C)
EXTERNAL INFLUENCE (these parameters affect all sensors except the outdoor
sensor. The parameter compensates for the external influence on the sensor that
is mounted in the heat pump.
0 (At AIR 5)
(interval: 0 / 20)
Shows the software version which is stored on the display card respectively the
I/O-card.
-
DISPLAY: V X.X
I/O-CARD: V X.X
LOGTIME
Time interval between collection points of temperature history in minutes. The
history graphs always show the 60 last collection points, which means that the
graphs can display history from 1 hour up to 60 hours ago.
1M (interval: 1M / 60M)
(The function is not active if there is an active alarm).
BRINE TIME ON
Switch on delay for compressor, in seconds.
30S (at internal passive
cooling 90S)
(interval: 10S / 90S)
BRINE TIME OFF
Switch off delay for brine pump, in seconds.
30S (interval: 10S / 60S)
TOPH. TIME
= Deactivates time period for peak heating charging (does not apply to system D).
ON = Activates time period for peak heating charging (does not apply to system D).
TOPH.TIME D
Time period to maintain peak heating charging temperature in hours (applies to
system D).
1H (interval: 1H / 10H)
Sub menu SERVICE -> DEFROST (DHP-A, -AL)
The menu applies to DHP-A, -AL with defroster card and only appears if OUTDOOR AIR in the SERVICE -> INSTALLATION -> SYSTEM -> HEAT
SOURCE menus is selected. Used to change settings for outdoor unit defrost.
Menu selection
Meaning
Factory setting
DEFR CURVE 0
The temperature of the heat pump’s brine return at which defrosting should
start, at 0°C outdoor temperature is set here, using + or -.
-10°C
(interval: -15°C / -5°C)
The graph can be changed up or down at 0°C outdoor temperature in the display. See section 12.9 for further information.
DEFR CURVE [value for
OUTDOOR STOP]
The temperature of the heat pump’s brine return line at which defrosting should
start, at the set outdoor temperature for OUTDOOR STOP is set using + or -.
The setting is made by reducing the OUTDOOR STOP value by this value.
EXTERIOR STOP reduced
by 4°C
(interval: -8°C / ‑1°C)
The number of degrees shown after DEFR CURVE in the display is the set value
for OUTDOOR STOP. The combined temperature is shown in the top right corner
of the display.
The graph can be changed up or down at the outdoor temperature OUTDOOR
STOP in the display. See section 12.9 for more information.
DEFR TEMPERATURE
The temperature shunted to the outdoor unit during a defrost.
15°C
(interval: 14°C / 20°C)
STOP DEFR
The temperature that must be reached in the Brine In sensor to complete a
defrost.
11°C (interval: 7°C / 12°C)
60
VMBMA502
Menu selection
Meaning
Factory setting
UNDER 5°C DEFR
Safety defrosting occurs when the outdoor temperature has been below 5° for a
set number of days, shunts +20°C for 10 minutes.
7D
(interval:
MIN TIME DEFROST
Minimum time between two defrosts in minutes.
45M
(interval: 10M / 60M)
DEFR SENSOR
Shows the actual temperature of the incoming air to the outdoor unit.
-
, 1D / 14D)
Sub menu SERVICE -> OPTI (Opti models)
The menu applies to Optimum models with speed controlled circulation pumps and only appears if ON in SERVICE -> INSTALLATION ->
SYSTEM -> ADDITION -> CONTROLLED CP menu is selected. Used to change the circulations pumps’ operating settings.
Menu selection
Meaning
Factory setting
TEMP DIFF CIRC.
Desired temperature difference between supply and return line for the heating
system..
8°C
Desired temperature difference between supply and return line for the brine
system.
3°C
Speed control of the heating system’s circulation pump in Volts. Higher voltage
gives a greater circulation pump speed, which gives a lower temperature difference. A low voltage gives a greater difference.
7V (interval: 3V / 10V)
TEMP DIFF BRINE
START FLOW CIRC.
(interval: , 0°C / 15°C)
(interval: , 0°C / 15°C)
3 - 10 = Manually adjustable speed, where 3 is low voltage and 10 is high voltage.
START FLOW BRINE
Speed control of the brine system’s circulation pump in Volts. Higher voltage
gives a greater brine pump speed, which gives a lower temperature difference. A
low voltage gives a greater difference.
10V (interval: 3V / 10V)
3 - 10 = Manually adjustable speed, where 3 is low voltage and 10 is high voltage.
CONST. FL. CIRC.
If TEMP DIFF CIRC is set to XX the flow is continuous with this value in the heating system. Value indicated in Volts.
7V (interval: 3V / 10V)
CONST. FL. BRINE
If TEMP DIFF BRINE is set to XX the flow is continuous with this value in the brine
system. Value indicated in Volts.
10V (interval: 3V / 10V)
MIN FLOW CIRC.
Lowest permitted voltage (speed) of the circulation pump’s flow in the heating
system. If there is no heat demand, there may still be a demand to read in the
temperatures for the sensors in the system and the circulation pump therefore
must be run.
3V (interval: 3V / 10V)-
MAX H.W CHARGE
Highest supply temperature during water heating.
55°C
(interval: 50°C / 65°C)
MIN H.W CHARGE
Lowest desired supply temperature during water heating.
50°C
(interval: 30°C / 65°C)
Sub menu SERVICE ->HGW (DHP-H Opti Pro)
The menu applies to the DHP-H Opti Pro model with de-superheater and only appears if ON in SERVICE -> INSTALLATION -> SYSTEM ->
ADDITION -> HGW SHUNT menu is selected. Used to change the de-superheater’s operating settings.
Menyval
Betydelse
Fabriksinställning
HGW TEMP.
Shows the HGW sensor after the de-superheater (the supply temperature to
water heater) in °C.
-
TEMP DIFF.
Desired difference between the HGW sensor and water heater’s start sensor.
20K
(interval: 15K / 35K)
HOT WATER DIFF.
Shows actual difference between the HGW sensor and water heater’s start sensor.
-
HOT WATER TO RAD.
If there is a heat demand, the HGW shunt switches to the heating system when
the weighted value is greater than the total of the START temperature for hot
water and this value. Example: 40°+3K = at a temperature of 43°C in the water
heater, the shunt switches to the heating system.
3K
(interval: 1K / 10K)
VMBMA502
61
Menyval
Betydelse
Fabriksinställning
MAX TEMP.
Max temperature of the water in the water heater. The temperature is measured
on the peak sensor in the water heater.
95°C
(interval: 60°C / 100°C)
NOTE! Domestic hot water can have this temperature, which can mean that an
external mixer valve may be required.
START HGW
The number of seconds the HGW shunt is to open at HGW start is the starting
point of shunt opening.
7S
(interval: 0S / 30S)
The opening time for the HGW shunt from fully closed to fully open towards the
water heater is 30 seconds.
INITIALIZING HGW
The time in seconds before control of HGW shunt starts after HGW start.
60S
(interval: 10S / 90S)
INTEGRAL DELAY
Delay of integral calculation in seconds after the integral value for HGW has
been reached.
10S
(interval: 5S / 120S)
HGW-SHUNT TIME
The time that the signal is active to open or close the HGW shunt completely.
35S
(interval: 15S / 60S)
HGW INT. BOUND.
Integral value (parameter) for HGW.
60 (interval: 10 / 120)
HGW INTEGRAL
Shows the actual value for the HGW integral. Plus indicates that the shunt opens
towards the hot water heater and minus indicates that the shunt opens towards
the heating system.
-
PULSE WIDTH
How long the plus or minus signal to the shunt is to be high when the HGW inte- 0,25S
gral has been reached.
(interval: 0,20S / 1,00S)
PULSES
Shows the relevant position for the shunt from the starting point for START HGW. At start-up the value is zero and for each + pulse that is sent to the sensor, the
value goes up one step. For - pulse, the value goes down one step.
62
VMBMA502
15 Troubleshooting
15.1 Alarm list
Shown in display in the event of an alarm. To reset alarms 1-5, set the operating mode to OFF or cut the power supply.
Message
Meaning
HIGHPRESS ERROR
Tripped high pressure switch. Compressor stopped. No hot water production.
LOWPRESS ERROR
Tripped low pressure switch. Compressor stopped. No hot water production.
MOTOR P ERROR
Deployed motor protection (Over current relay compressor). Compressor stopped. No hot
water production.
BRINE OUT
Brine out is less than the set minimum temperature. Compressor stopped. No hot water
production.
BRINEFLOW LOW
Flow sensor not active during last start. Compressor stopped. No hot water production.
ADD. HEAT
Overheating protection deployed. No additional heat.
SENSOR OUTDOOR
Fault in outside sensor. Zero degrees used for calculations.
SENSOR FRONT
Supply line sensor error. Everything stops except the heating system’s circulation pump.
SENSOR RETURN
Return sensor fault. Return temperature = Supply line – 5 is used. Calculated supply temperature limited to maximum 45°C.
SENSOR HOT WATER
Fault on sensor for start temperature. No hot water production.
SENSOR DEFROST
Defrost sensor fault. Heat and hot water production is controlled from the outdoor sensor’s
value instead. (Applies to DHP-A, -AL)
MS FAN
Deployed motor protection for outdoor unit fan. Compressor stopped. No hot water production. (Applies to DHP-A, -AL)
SENSOR COOLING
Sensor fault. Cooling function stops.
15.2 Measurement points
Conversion table for sensors
NOTE! When reading the resistance of the sensors, the sensor leads must first be disconnected from the control equipment.
Outdoor sensor
Other sensors
°C
ohm, Ω
°C
kilo ohm, kΩ
-30
1884
0
66.3
-25
1443
5
52.4
-20
1115
10
41.8
-15
868
15
33.5
-10
681
20
27.1
-5
538
25
22.0
0
428
30
18.0
5
343
35
14.8
10
276
40
12.2
15
224
45
10.1
20
183
50
8.5
25
150
55
7.1
30
124
60
6.0
35
103
65
5.0
40
86
70
4.2
75
3.7
80
3.1
85
2.7
90
2.3
95
2.0
1. Disconnect the sensor cable at the I/O card.
2. First measure the sensor including the cable.
3. Then measure the sensor only.
VMBMA502
63
15.3 Check points
Temperatures
Name
Values
Condensing temperature
0.5 – 1.5 °C above supply line temperature
Evaporation temperature
7 - 8 °C lower than incoming brine
Overheating
4 - 8 K temperature difference
Radiator circuit
5 - 10 K temperature difference
Brine circuit
2 - 5 K temperature difference
Overheating R407C
4K ±1 K
Expansion valve factory setting
Name
Setting
Danfoss TUBE R404A, 4.2 kW
From fully closed position, screw 3 turns out
Danfoss TUBE R404A, 5.6 kW
From fully closed position, screw 5.5 turns out
Danfoss TUBE R404A, 8.4 kW
From fully closed position, screw 5 turns out
Danfoss TUBE R404A, 12.0 kW
From fully closed position, screw 5.25 turns out
Danfoss TUBE R404A, 15.3 kW
From fully closed position, screw 2.75 turns out
Danfoss TUBE R407C, 11.0 kW
From fully closed position, screw 6.25 turns out
Danfoss TUBE R407C, 17.0 kW
From fully closed position, screw 5.5 turns out
Break pressure pressure switches
Refrigerant
Pressostat
Break pressure
R407C
Low pressure switch
0.08 MPa
Operating pressure switch A
2.65 MPa
Operating pressure switch B
2.85 MPa
High pressure switch
3.10 MPa
R134a
(Only applies for
certain models
of DHP-C)
R404A
(Only applies to
DHP-A, -AL)
64
Low pressure switch
0.03 MPa
Operating pressostat
1.80 MPa
High pressure switch
2.45 MPa
Low pressure switch
0.08 MPa
Operating pressure switch A
2.65 MPa
Operating pressure switch B
2.85 MPa
High pressure switch
3.10 MPa
VMBMA502
15.4 Operational problems
ALARM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Problem – Alarm LP (low pressure pressure switch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Problem – Alarm HP (high pressure pressure switch) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Problem – Alarm MS (motor protection) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Problem – Alarm sensor (all) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Problem – Incorrect phase sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Problem – Alarm TS (addition) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Problem – Alarm Brine out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Problem – Alarm Brine flow low . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Problem – Operating pressure switch open alternatively high hot gas temperature (indicated by med in the display’s
lower left corner) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
LEAKAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Problem – Leak fluid side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
NOISE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Problem – Noise problem in the radiator system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Problem – Loud compressor noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Problem – Shrieking whistling noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Problem – Noise – miscellaneous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
HOT WATER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Problem – Temperature and/or quantity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
HEATING COMFORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Problem – Too cold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Problem – Too hot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
OTHER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Problem – The heat pump runs and runs but never stops . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Problem – Runs on electric heating element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Problem – The auxiliary heater is in operation but not the compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Problem – The heat pump consumes too much energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Problem – Auxiliary heater cuts in too soon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Problem – Short operating times despite heating demand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Problem – Connection of external AH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
OUTDOOR UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Problem – Noise/loud noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Problem – Defrosting problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Problem – Build-up of ice under and around the outdoor unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Problem – Water run-off by the outdoor unit, risk of moisture problems in house foundations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Problem – Alarm LP (low pressure pressure switch)
Cause
Troubleshooting
Remedy
Clean the strainer if necessary.
1. Blocked strainer on the brine circuit.
Check that the strainer is not blocked.
2. Air in the brine circuit.
Listen for air in the heat pump and brine circuit. Bleed the brine circuit according to the
installation instructions.
3. Closed taps, main tap or filler cock on the
brine circuit.
Check that the shut-off cock/any other taps are
open.
Open closed taps.
4. The circulation pump for the brine circuit
is defective or has jammed.
Check:
• That the shut-off valves are open.
The circulation pump may have
jammed, if so, open the bleed screw and
try to release the paddle wheel using a
screwdriver for example.
• That the strainer is not blocked.
Open closed valves or taps.
• That no air is in the heating system.
Check, and, if necessary, clean the
strainer.
• That the circulation pump spins.
If necessary, bleed the heating system
according to the installation instructions
5. Cable break or loose cable to low pressure pressure switch.
• Check that both cables are connected on the
pressure switch.
If a cable has come loose, connect it.
• Using the buzzer, check that there are no
cable breaks. In order to do this, disconnect
the cables from the pressure switch and circuit
board.
If there is a cable break, replace the
cable.
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65
Cause
Troubleshooting
Remedy
6. The low pressure pressure switch opens
too soon.
• Incorrect pressure switch installed. Higher
break pressure than intended. See marking.
If the low pressure pressure switch opens
too soon or is always open, replace it.
• Pressure switch fault, opens at a higher pressure than indicated (mark pressure). Check using
the manometer apparatus.
• Defective pressure switch, always open.
7. Incorrect type of anti-freeze, must be in
accordance with instructions.
Check that the correct type of anti-freeze is used. If the incorrect type of anti-freeze is used,
the entire system must be drained and
refilled with a new mixture.
8. Incorrect mix of anti-freeze, the concentra- Check the freezing point of the mix using a
tion must be in accordance with instructions. refractometer.
If the mixture is not in accordance with
the instructions, it must be remixed in
an external container. This is because the
fluids do not mix with each other well if
one is filled directly into the system.
9. Short active collector, e.g. short or dry bore • Check the length of the collector that is being
hole, short surface soil collector.
used and compare with the collector length in
the dimensioning documentation.
• In addition, check that the collector is not suspended ”in free air” if boreholes are used.
If the active collector is too short, the
heat pump cannot receive enough energy from the heat source, which results
in it requiring an addition to cover the
energy requirement.
10. Collector too long, pressure drop too
great.
Check the length of the collector that is being
used and that it is connected in parallel (not
connected in series) if more than 1 coil is being
used.
If a longer collector is being used than
recommended for the specific heat
pump, it must be divided on several parallel connected coils.
11. Expansion valve defective or incorrectly
set.
Using manometer apparatus and thermometer
check what the overheating reading of the unit
is.
Also check that bulb and capillary tube are
undamaged and that the bulb is correctly
installed.
If the overheating reading does not correspond with the instructions for the
specific refrigerant, adjust the expansion
valve until the correct value is obtained.
See separate instructions for cooling
techniques.
Using manometer apparatus and thermometer,
check that the unit’s overheating is correct for
the specific refrigerant.
Follow the correct procedure (depending
on type of refrigerant) to add the correct
amount of refrigerant.
12. Lack of refrigerant, not enough refrigerant in the system.
If overheating cannot be adjusted with
the expansion valve or if the capillary
tube/bulb is damaged, replace it.
If there appears to be a leak in the refrigerant circuit, carry out leak tracing and
any necessary corrective action.
13. Drying filter blockage.
Check the temperature difference above the dry- If the drying filter is blocked, replace it.
ing filter. A one degree difference is permissible.
If the difference is greater than 1 degree, the filter is blocked. Take a reading during operation.
14. Blocked evaporator on the water side.
If there is no strainer in the brine circuit, there
If the evaporator is thought to be
is a risk of dirt sticking in the evaporator and
blocked, try flushing it. If this does not
blocking it. Unfortunately there is no easy way of work, it must be replaced
checking if the evaporator is blocked.
You can carry out a test by allowing the compressor and circulation pumps to remain in operation. Check that the circulation pumps work
(for circ.pumps with a venting screw, unscrew it
and feel if the pump rotor rotates using a screwdriver).
Then read the temperature on both connection
pipes to the evaporator:
If the temperature difference is <1°C, the evaporator is probably blocked.
If the temperature difference is 2-6°C, it is probably not blocked.
If the temperature difference is >6°C, the evaporator is probably blocked.
15. Blocked evaporator on the refrigerant
side.
66
Using manometer apparatus and thermometer,
check that the unit’s overheating is correct for
the specific refrigerant.
VMBMA502
If the evaporator is thought to be
blocked by oil for example, try blowing
nitrogen through it to release the oil. If
this does not work, it must be replaced
Problem – Alarm HP (high pressure pressure switch)
Cause
Troubleshooting
Remedy
1. Blocked strainer in the heating system.
Check that the strainer is not blocked.
Clean the strainer if necessary.
2. Air in the heating system.
Listen for air in the heat pump and heating
system.
Bleed the heating system circuit according to the installation instructions.
3. Closed or partially closed thermostats/
valves in the heating system.
Check that the thermostats/valves in the heating system are open.
Open closed thermostats/valves.
4. The circulation pump that is defective or
has jammed.
Is there voltage to the circulation pump?
In the control computer’s manual test
menu check that the circulation pump
is active.
Check if there is voltage to the circulation pump, if there is, and it does not
run, the circulation pump is jammed.
If this is the case, open the bleed
screw and try to release the paddle
wheel using a screwdriver for example
(Does not apply to heat pumps in the
Optimum series).
If there is no voltage to the circulation
pump, check if there is voltage from the
control computer, see wiring diagram. If
there is voltage from the control computer, check the components between the
control computer and circulation pump.
If a component is defective, replace it.
5. Shut-off main tap in heating system.
Check that the main tap is open.
Open closed main tap.
6. Cable break or loose cable to high pressure pressure switch.
• Check that both cables are connected on the
pressure switch.
If a cable has come loose, connect it.
• Using the buzzer, check that there are no
cable breaks. In order to do this, disconnect
the cables from the pressure switch and circuit
board.
If there is a cable break, replace the
cable.
• Incorrect pressure switch installed. Same or
higher break pressure than high pressure pressure switch. See marking.
If the operating pressure switch does
not open, replace it.
7. The operating pressure switch does not
open.
• Pressure switch fault, opens at a higher pressure than indicated (mark pressure). Check
using the manometer apparatus.
• Defective pressure switch, never opens.
8. The high pressure pressure switch opens
too soon.
• Incorrect pressure switch installed. As low or
lower break pressure than operating pressure
switch. See marking.
If the high pressure pressure switch
opens too soon or is always open,
replace it.
• Pressure switch fault, opens at a lower pressure than indicated (mark pressure). Check
using the manometer apparatus.
• Defective pressure switch, always open.
9. External system shunt that closes on time
setting.
Check for shunts or valves in the system, which
are timer-controlled, that close down the entire
or too large a part of the heating system.
Always ensure that there is a sufficiently
large water volume for the heat pump
to work against, i.e. for the heat to give
off its heat to.
10. Incorrectly facing non-return valve with
too high opening pressure.
• Check the system’s direction of flow and that
the non-return valve is turned the correct way.
If the non-return valve is facing the
wrong way, turn it.
• Check that the heat pump’s external available
pressure exceeds the non-return valve’s opening pressure.
If the non-return valve has too great an
opening pressure, replace it.
11. Large pressure drop in the heating system.
• Dirt in the heating system.
• Closed or partially closed thermostats/valves
in the heating system.
If necessary, clean/flush the heating
system.
Open closed thermostats/valves.
• Under dimensioned pipe system. Check that
the HP’s external available pressure exceeds the If there is not sufficient pressure equipsystem pressure drop.
ment, the heating system can be adjusted according to the system solution for
large pressure drop.
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67
Cause
Troubleshooting
Remedy
12. Overfilled refrigerant circuit.
Using manometer apparatus and thermometer,
check that the unit’s overheating is correct for
the specific refrigerant.
Follow the correct procedure (depending on type of refrigerant) to add the
correct amount of refrigerant.
If there appears to be a leak in the refrigerant circuit, carry out leak tracing and
any necessary corrective action.
13. Blocked condenser on the water side.
If there is no strainer in the heating system,
there is a risk of dirt sticking in the condenser
and blocking it. Unfortunately there is no easy
way of checking if the condenser is blocked.
If the condenser is thought to be
blocked, try flushing it. If this does not
work, it must be replaced
You can carry out a test by allowing the compressor and circulation pumps to remain in
operation and after a while, check that the
delivery pipe becomes hot and that the circulation pumps work (for circ.pumps with a venting
screw, unscrew it and feel if the pump rotor
rotates using a screwdriver).
Then read the temperature on both connection
pipes to the condenser:
If the temperature difference is <3°C, the condenser is probably blocked.
If the temperature difference is 3-13°C, it is
probably not blocked.
If the temperature difference is >13°C, the condenser is probably blocked.
Using manometer apparatus and thermometer,
check that the unit’s overheating is correct for
the specific refrigerant.
If the condenser is thought to be
blocked by oil for example, try blowing
nitrogen through it to release the oil.
If this does not work, it must be replaced
Cause
Troubleshooting
Remedy
1. Phase drop or blown fuse.
Check that all phases are present on the terminal block for incoming supply. If not, check the
fuses in the cabinet.
If any of the phases are not present, check
backwards towards the building’s main
electrical cabinet. If there are no phases
there, contact the network supplier.
14. Blocked condenser on the refrigerant
side.
Problem – Alarm MS (motor protection)
Also check that all wiring is secure, if screw
terminals are used they must be properly tightened, if phoenix flat spring terminals are used,
the cables must be secure in the correct hole
with load on the cable.
2. Defective soft-starter.
Measurement check and establish that when
If the soft-starter does not release the
the control computer gives a signal (there must phases when it receives signals from the
be voltage between A1 & A2 on the soft-startcontrol computer, replace it.
er), the soft-starter releases all three phases
down to the compressor.
3. Defective contactor.
Measurement check and establish that when
If the contactor does not release the
the control computer gives a signal (there must phases when it receives signals from the
be voltage between A1 & A2 on the contactor), control computer, replace it.
the contactor releases all three phases down to
the compressor.
4. Defective or incorrectly set motor protection.
Use a hook-on meter to establish when the
motor protection deploys, check what the
motor protection is set to. Compare with the
table.
If the motor protection is defective,
replace it.
Check the supply to the motor protection//
soft-starter/compressor.
If a cable is damaged, replace it.
5. Cable break.
68
VMBMA502
If incorrectly set, adjust to the correct
value.
Cause
Troubleshooting
Remedy
6. Defective compressor.
If the compressor is defective, replace it.
Measurement check the voltage on the three
phases (each to zero) at the compressor.
Deviations from the average of the three values should not be more than 12% on any of
the phases. If measurement checking the winding’s impedance the same value must be on all
three windings.
Problem – Alarm sensor (all)
Cause
Troubleshooting
Remedy
Sensor fault alternatively cable fault.
• When reading the resistance of the sensors,
the sensor leads must first be disconnected
from the control equipment or terminal block.
If the sensor gives a correct value, the
cable is defective.
• First take a reading from the sensor including
cable and check against the ohm table in the
Measurement points section.
If the sensor does not give a correct
value, the sensor is defective.
• If the read off value does not correspond with
the table, only measure the sensor and check
the ohm table in the Measurement points section.
Problem – Incorrect phase sequence
Cause
Troubleshooting
Remedy
The incoming phases have the incorrect
sequence (only applies to 3-phase heat
pumps).
• If the text ERR PHASE SEQ appears in the
display when the heat pump is powered, (only
appears in the first 10 minutes) this means that
the phases have the incorrect sequence.
If the phases are in the incorrect order,
switch two incoming phases at the main
terminal block and recheck according to
the troubleshooting window.
• When the compressor is running, check the
delivery pipe temperature by feeling the delivery pipe that should be hot (not just warm)
even a little distance from the compressor if the
phases are correctly sequenced.
• When the compressor runs with the phases
incorrectly sequenced a strange noise may be
heard (loud, rattling) when the compressor runs
backwards.
Problem – Alarm TS (addition)
Cause
Troubleshooting
Remedy
1. The overheating protection has tripped.
Check if the overheating protection has tripped.
If the overheating protection has
tripped, reset it.
2. Phase drop.
• Check if the overheating protection has tripped.
The alarm occurs when 230 V is not registered between L2 on the circuit board and
N (220).
• Check if any cables at the circuit board or overheating protection are loose or damaged.
If the overheating protection has
tripped, reset it.
3. Overheating protection fault, cannot be
reset.
Press the reset button, measurement check for
230 V on the incoming and outgoing connections.
If the overheating protection is defective, replace it.
4. Flow sensor fault.
Check what the flow sensor shows, is it a plausible/actual value?
If the sensor is defective, replace it.
If the cables are loose/damaged, secure
or replace them.
Measure the resistance of the sensor, check
against the ohm table in the Measurement
points section.
VMBMA502
69
Cause
5. No or insufficient circulation in the heating system.
Troubleshooting
Remedy
• That the strainer is not blocked.
The circulation pump may have
jammed, if so, open the bleed screw and
try to release the paddle wheel using a
screwdriver for example.
• That no air is in the heating system.
Open closed valves or taps.
Check, and, if necessary, clean the
strainer.
If necessary, bleed the heating system
according to the installation instructions.
6. The submersible tube in the electric heating element is against the coils.
Check what the flow temperature is when the
The submersible tube can be prised out
overheating protection trips. It normally trips at slightly from the coils using a screwabout 95°C.
driver or similar. The submersible tube
must be vertical.
Problem – Alarm Brine out
Cause
Troubleshooting
Remedy
1. Defective sensor.
Check what the sensor shows, is it a plausible/
actual value?
If the sensor is defective, replace it.
Measure the resistance of the sensor, check
against the ohm table in the Measurement
points section.
2. Brine temperature too low.
Check the set value on ALARM BRINE in the
heat pump’s control computer.
The alarm is triggered when the temperature on BRINE OUT is as low or lower
than the set value on ALARM BRINE. In
the factory setting this function is inactive.
Cause
Troubleshooting
Remedy
1. Incorrect system selected in the control
computer.
In the menu SYSTEM, check which is selected.
If the incorrect system is selected,
change it.
• Check whether the ground water pump is
running?
The ground water pump must start and
run together with the heat pump’s integrated brine pump.
Problem – Alarm Brine flow low
If the system does not contain a flow switch
but the control computer is set for the system with flow switch, this alarm occurs.
2. Insufficient flow.
• Check the flow switch.
• Calibration/setting the flow switch.
• Blocked exchanger?
Check against the wiring diagram that
the flow switch is correctly connected.
Check that the flow switch is set for the
correct working range according to the
flow switch instructions.
If the exchanger is blocked, clean or
replace it.
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VMBMA502
Problem – Operating pressure switch open alternatively high hot gas temperature
(indicated by med in the display’s lower left corner)
Cause
Troubleshooting
Remedy
1. The operating pressure switch does not
close again.
1. Switch off the main switch for the heat
pump, wait until the compressor has been
stationary for at least 15 minutes.
If the pressure switch is closed, bridge the
pressure switch cables temporarily and
switch on the current to the heat pump
again. If there is an indication in the display
this means that the pressure switch is faultfree and the problem is in the wiring or in
the circuit board.
2. Disconnect the two cables on the pressure switch, using a buzzer check if the
pressure switch is closed.
If the pressure switch is open, try carefully
tapping the head of the pressure switch
with a screwdriver and use a buzzer test to
see if it has closed again.
Replace the pressure switch if it appears to
jam repeatedly.
2. Sensor fault, shows >120°C
Check what the sensor shows, is it a plausible/actual value?
If the sensor is defective, replace it.
Measure the resistance of the sensor, check
against the ohm table in the Measurement
points section.
3. Hot gas temperature too high.
Check the set value on DELIVERY PIPE in the
heat pump’s control computer (factory setting 120°C)
The square symbol appears when the delivery pipe temperature is as high or greater
than the set value for DELIVERY PIPE.
4. Overheating too high.
Using manometer apparatus and thermometer check what the overheating reading of
the unit is.
If the overheating reading does not correspond with the instructions for the specific
refrigerant, adjust the expansion valve until
the correct value is obtained. See separate
instructions for cooling techniques.
Also check that bulb and capillary tube are
undamaged and that the bulb is correctly
installed.
5. Lack of refrigerant, not enough refrigerant in the system.
Using manometer apparatus and thermometer, check that the unit’s overheating is
correct for the specific refrigerant.
If overheating cannot be adjusted with the
expansion valve or if the capillary tube/bulb
is damaged, replace it.
Follow the correct procedure (depending
on type of refrigerant) to add the correct
amount of refrigerant.
If there appears to be a leak in the refrigerant circuit, carry out leak tracing and any
necessary corrective action. If leak tracer
is not available, brush soap water on the
suspected leak and look for bubbles. Also
check for oil as this can come out from the
refrigerant circuit.
LEAKAGE
Problem – Leak fluid side
Cause
Troubleshooting
Remedy
1. Insufficiently tightened connections.
Locate the leak.
• Tighten the connection and check that it
is sealed
• If it is still not sealed, replace the entire
connection and support sleeve (only at soft
pipes)
2. Cracked nut or connection.
Locate the leak.
Replace nut or connection.
3. Defective gasket or O-ring.
Locate the leak.
Replace the gasket or O-ring.
4. There is no overflow pipe connected to
the safety valve(s).
Establish which safety valve does not have
an overflow pipe.
Install an overflow pipe according to the
applicable norms.
5. Filler valve between incoming cold water
and heating system not closed or leaking.
Check whether water continuously leaks
from the safety valve on the expansion vessel on the hot side.
Try closing the filler valve and see if water
stops dripping from the safety valve, if not,
replace the filler valve.
6. No condensation drain to heat pump’s
drip tray.
Check that condensation drain is installed
and correctly connected.
Install the condensation drain that runs out
into the floor drain.
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71
Cause
Troubleshooting
Remedy
7. Lack of condensation insulation on cold
water pipe and/or brine pipe.
Establish where the condensation is coming The brine pipe must always be insulated.
from.
In the event of problems with condensation on the cold water pipes, insulate them.
Condensation often accumulates in joints
and angled sections of the insulation.
Improve the insulation.
8. Leak at soldered joints.
Locate the leak.
Drain the system of fluid, repair the leak. If
the leak is on the connection pipe to the
heat exchanger, also drain the refrigerant
side.
9. Leak at the condenser’s drain cock.
1. Check that the valve is completely closed.
2. Check that the sealed cover is sealed.
If the sealed cover is not sealed, replace the
sealed cover or the entire drain tap.
10. Leak at the condenser’s bleed valve.
Check that it is completely closed.
If it is fully closed and still leaks, replace it.
11. Leak at soldered joint on water heater.
Locate the leak.
If there is a leak at the soldered joint,
replace the water heater.
12. Associated leak on the water heater.
• Establish whether water continuously
leaks from the safety valve on the expansion vessel on the hot side.
If the water heater has a leak, replace it.
• Establish whether water continuously
leaks from the safety valve on the cold side.
13. Associated leakage in the condenser.
• Check for lack of refrigerant in the unit.
If the condenser has a leak, replace it.
• Check by smelling by safety valve on the
hot side, open the valve and check.
14. Anti-freeze is forced out of the safety
valve on the expansion tank (brine system).
During the winter, water surrounding the
hoses in the borehole can freeze. In some
cases, the ice can push against the hoses
slightly. Due to the reduction in volume in
the hose, the anti-freeze fills the expansion
tank and eventually forces some fluid out of
the safety valve.
When the ice in the borehole melts and the
hose expands and returns to its original
state, a vacuum is generated which results
in a reduction in tank level. As the safety
valve does not let any air in, the expansion
tank can retract inwards due to the vacuum
created.
To prevent anti-freeze from being forced
out from the safety valve, you can exchange
the existing expansion tank for a closed
pressure expansion vessel with a greater
volume.
To prevent the expansion tank retracting
inwards, a vacuum valve can be installed in
the system.
NOISE
Problem – Noise problem in the radiator system
Cause
Troubleshooting
Remedy
1. Flexible hoses missing.
Flexible hoses must be installed according
to the instructions.
Install flexible hoses according to the
instructions.
2. Incorrectly installed flexible hoses.
Flexible hoses must be installed according
to the instructions.
Install flexible hoses according to the
instructions.
3. Installing/suspending pipes.
Check if the mountings are too rigid, right
type, right sizes and/or installed too close
together.
If something seems to be incorrect according to the troubleshooting window, carry
out corrective actions.
4. Clicking.
• Establish when clicking occurs, during
heating and/or in connection with completed hot water production?
A surge tank can be installed on the supply
line to mix the hot water with the existing,
slightly cooler, water, before it goes out to
the radiators.
• Locate the clicking noises.
72
VMBMA502
Try lubricating lead-ins in walls, ceilings and
floors with silicone spray.
Cause
Troubleshooting
Remedy
5. Circulation noise (whistling noise in the
heating system).
Check the heating system.
If the incorrect type of valve is used to
choke the flow, replace with the correct
type.
• Closed valves, choke valves, adjuster
valves or other restrictions in the radiator
system can cause circulation noise.
• Is the heating system correctly adjusted
for flow?
• Too great a flow in the heating system can
cause circulation noise.
If the heating system is not correctly adjusted, make adjustments.
Can the heating system be run at a lower
flow?
Problem – Loud compressor noise
Cause
Troubleshooting
Remedy
1. Phase drop.
1. Check that there is 400 V between incoming phases on the heat pump.
Check where the phase drop is and rectify.
The compressor attempts to start or operates on two phases.
2. If there is supply to the heat pump, measure the voltage for all electrical components
all the way to the compressor, see wiring
diagram.
2. Touching pipes – vibrations.
Establish which pipe(s) is/are causing the
problem.
Try to release any tensions that cause the
vibrations.
3. Compressor fault.
Determine whether the compressor is unusually loud.
If the compressor is defective, replace it.
Cause
Troubleshooting
Remedy
1. Whistling expansion valve.
1. Take overheating readings, adjust to the
recommended value.
Check if the noise has stopped, if not, continue with point 2.
2. Open and close the valve fully in and out.
Continue with point 3.
3. Adjust the expansion valve to recommended overheating value again.
If the problem persists, replace the expansion valve.
2. Noise from the soft-starter.
Measurement check the input and output
phases for the soft-starter as well as the
control signals from the control computer,
see wiring diagram.
If the soft-starter is defective, replace it.
3. The compressor’s IPR valve opens.
The compressor has an integrated IPR valve
that opens at 28 ±3 bar.
If it opens at a too low pressure, replace the
compressor.
Problem – Shrieking whistling noise
When the valve opens, pressure equalizes
between the compressor’s high and low
pressure side and a milling/whistling sound
is heard.
To establish whether the valve opens at the
correct pressure, connect a manometer on
the high and low pressure side.
When the valve opens, this is indicated by
the pressure on the low pressure side rising
and reaching the pressure on the high pressure side.
Check at what pressure the valve starts to
open.
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73
Problem – Noise – miscellaneous
Cause
Troubleshooting
Remedy
1. Vibrating protective sleeves on the pressure switches.
Establish where the vibration noise is coming from.
Prevent the protection sleeve vibrating by
using insulation tape for example.
2. Vibration noise from the electrical installation.
Check for electrical steps or similar devices
screwed to the heat pump and wall. These
can cause vibrations and noise.
Carry out according to the installation
instructions.
3. The heat pump is not level.
Check that the heat pump is level by using
a spirit level.
If the heat pump is not level, adjust using
the feet.
Check that the heat pump is supported by
all four feet
HOT WATER
Problem – Temperature and/or quantity
Cause
Troubleshooting
Remedy
1. Defective 3-way valve motor.
Check the function of the 3-way valve, that
it runs between the end positions by running a manual test.
If the motor is defective, replace it.
2. Jammed 3-way valve insert.
Detach the motor and test closing and
opening of the valve by pressing the control arm
If the insert jams, remove and clean it, or
replace it.
During hot water production:
Bleed the system.
• Listen for air.
A Large temperature difference can indicate
air in the system.
The valve is not secure and releases hot
water to the radiators during hot water
production.
3. Air in TWS coil or water outer jacket.
• Check the temperature difference
between supply and return line.
4. Start temperature set too high for hot
water production.
Check that the start temperature is correctly • If the start value is set too high, reduce it
set. Should not be set above the factory set to the factory set value.
value.
• If the system has a high (>+8°C) brine temperature, you may have to reduce the start
value further for a longer running time.
5. Sensor fault, hot water sensor.
Check what the hot water sensor (the start
sensor) shows, is it a plausible/actual value?
Hot water production is started by the hot
water sensor.
6. Large drain flow (>12l/min).
If the sensor is defective, replace it.
Measure the resistance of the sensor, check
against the ohm table in the Measurement
points section.
Check how many litres of hot water (approx. If the drain water flow is greater than 12l/
40°C) per minute drains from the tap. Use a min, stratification in the water heater is
clock and bucket to measure the drain flow. affected, which reduces the hot water
capacity.
Suggested corrective actions:
• Install a pressure reduction valve on the
incoming cold water pipe.
• Change to a mixer with lower flow.
• Adjust the drain flow on the existing mixer,
do not open the tap fully.
7. Water heater too small in relation to
requirement.
How large is the requirement and what is
the capacity of the heater?
Replace with a larger heater or supplement
with an extra heater.
E.G. supplement with an MBH TWS or an
electric heater.
8. The operating pressure switch opens too
soon (at too low a pressure).
Check the break pressure using manometer
apparatus.
Hot water production ends when the operating pressure switch opens.
74
If the pressure switch opens at the incorrect
pressure, replace it.
The replacement pressure switch can be
installed on the service output (Schrader
valve)
VMBMA502
Cause
Troubleshooting
Remedy
9. Insufficient exchange surface to transfer
the heat pump’s output to the heater.
Is the exchange surface too small?
Replace with a heater with a larger
exchange surface.
10. Heat loss in the hot water pipe.
Open the hot water tap, read off the temperature on the outgoing hot water pipe
from the heat pump and the temperature of
the hot water. The temperature difference
measured between the heat pump and hot
water indicates the temperature loss.
Can the heater cope with the heat pump’s
(Only applies to heat pumps with a separate output?
heater)
If any problems occur during troubleshooting as per the points, carry out corrective
actions.
To quickly check that the heat pump’s hot
water production works as it should, drain
the hot water so that the heat pump starts
Examples of temperature loss causes:
to produce the hot water. When done, read
off the temperature on the top sensor and
• Long water pipes.
on the start sensor. The top sensor should
• Uninsulated hot water pipes.
show a temperature of around 50-55°C and
• Hot water pipes routed through cold areas. the start sensor around 45-48°C. If, after
completed hot water production, these
Other causes that can affect the hot water
temperatures are obtained, this means that
temperature:
you have the correct temperature and volume of hot water in the water heater.
• Is a mixer valve installed in the system?
Temperature set too low on the mixer
valve? Leaking mixer valve?
• Water tap fault? Leaking thermostat mixer?
HEATING COMFORT
Problem – Too cold
Cause
Troubleshooting
Remedy
1. The heat pump’s control computer is
not set/adjusted to the customer’s requirements/wishes.
Check the ROOM and CURVE and MAX settings.
Adjust incorrect values in the heat pump’s
control computer.
ROOM = Desired indoor temperature
CURVE = Should be set so that the desired
indoor temperature (ROOM) is maintained
regardless of the outdoor temperature.
MAX = Highest set-point value on the supply line regardless of the outdoor temperature.
2. Incorrect operating mode set in the heat
pump’s control computer.
Check which operating mode is set.
If the incorrect operating mode is set,
change to the desired operating mode.
3. Sensor fault, OUTDOOR/ROOM/Supply
line/Return line.
Check what the relevant sensor shows, is it
a plausible/actual value?
If the sensor is defective, replace it.
Measure the resistance of the sensor, check
against the ohm table in the Measurement
points section.
4. The 3-way valve has jammed in hot water
mode.
1. Check the function of the 3-way valve
motor by test running it manually. If the
motor does not shift mode during manual
test operation, check that there is voltage to
the motor, see wiring diagram.
2. Detach the motor and test closing and
opening of the valve by pressing the control arm.
1. Is the motor being supplied with voltage
according to the wiring diagram in both
operating instances?
MANUAL TEST – VXV HOT WATER
0=Radiator mode, arm out from valve.
1=Hot water mode, arm positioned towards
the valve.
If there is voltage to the motor but the arm
does not shift mode, replace it.
2. Take out and clean the jammed insert, or
replace with a new insert.
5. Defective electric heating element.
Use a buzzer and check if all coils in the
electric heating element are intact.
VMBMA502
If the electric heating element is defective,
replace it.
75
Cause
Troubleshooting
Remedy
6. The heat pump has stopped on HIGH
RETURN.
• Check what the MAX RETURN value is set
at in the heat pump’s control computer. It
must be adjusted to the unit’s maximum
supply temperature and the system’s delta
temperature so that it does not cut at too
high a return temperature when the highest
supply temperature is transmitted.
If the MAX RETURN value is not adjusted for
the system according to the troubleshooting window, adjust it.
If the sensor is defective, replace it.
• Check what the return line sensor shows,
is it a plausible/actual value? If not, take
a resistance reading from the sensors
and check against the ohm table in the
Measurement points section.
7. Heat production is stopped by the
HYSTERESIS function.
If the flow temperature rises as soon as
heat production is stopped by HYSTERESIS
before INTEGRAL reaches 0, there may be
heating deficit in the house.
• Check if heat production stops because
the hysteresis value is set too low? (See the
installation instructions for factory setting.)
• Check if heat production stops because
thermostats/valves in the heating system
are closed or partially closed?
• Try increasing the hysteresis value until the
heat pump stops on INTEGRAL instead.
• Open thermostats/valves in the heating
system and check that the heat pump stops
on INTEGRAL.
• If the heating system is deemed to be
under dimensioned, the system must be
extended (increase the heat emitting surface).
• Check if heat production stops because
the heating system is under dimensioned?
8. The auxiliary heater is not permitted to
cut in with sufficient output.
Check the set value on MAXSTEP in the heat If necessary, adjust the MAXSTEP value in
pump’s control computer.
the heat pump’s control computer.
Value set too low on MAXSTEP.
MAXSTEP 1 = 3 kW
MAXSTEP 1 = 3 kW
MAXSTEP 2 = 6 kW
MAXSTEP 2 = 6 kW
MAXSTEP 3 = 9 kW
MAXSTEP 3 = 9 kW
MAXSTEP 4 = 12 kW (only DHP-A, -AL, cannot cut in when the compressor is running.)
MAXSTEP 4 = 12 kW (only DHP-A)
MAXSTEP 5 = 15 kW (only DHP-A, -AL, cannot cut in when the compressor is running.)
MAXSTEP 5 = 15 kW (only DHP-A)
MAXSTEP +4 = 12 kW (only DHP-A)
MAXSTEP +4 = 12 kW (only DHP-A, -AL, can
cut in when the compressor is running.)
MAXSTEP +5 = 15 kW (only DHP-A)
MAXSTEP +5 = 15 kW (only DHP-A, -AL, can
cut in when the compressor is running.)
9. The external auxiliary heater does not
start when the heat pump’s control computer requests it.
If an external auxiliary heater is used, check Connect the external auxiliary heater
that it is correctly installed by test running it according to the instructions.
in MANUAL TEST – ADD.HEAT - 1.
If it does not start at manual test operation,
check that the start signal/voltage comes
from the heat pump. See wiring diagram.
Measure the voltage on the control computer’s probe L2 Oil/Electricity.
10. Closed or partially closed thermostats/
valves in the heating system.
Check that the thermostats/valves in the
heating system are open.
Open closed thermostats/valves.
11. The total output of the heat pump and
auxiliary heater is too low in relation to the
building’s power demand.
What is the building’s power demand?
Ensure that available power is at least as
great as the building’s power demand.
12. Under dimensioned heating system.
Check existing heating system.
What is the output of the heat pump?
What is the output of the auxiliary heater,
what is it set to?
What output is it dimensioned for to produce at what supply temperature?
What output is required to keep the room
warm?
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VMBMA502
If the heating system is dimensioned for
greater supply temperatures than the heat
pump can provide, it must be adjusted by
increasing the heat emitting surface for
example.
If the room requires a higher output than
the heating system can provide, extend the
heating system.
Cause
Troubleshooting
Remedy
13. Changed conditions.
• If the heat pump has been dimensioned
Have you increased your heating and/or hot for a certain demand and this demand is
increased, the heat pump might not be able
water demand?
to maintain the desired room temperature.
If the heat pump cannot cope with the
demand, replace it with one with a higher
output or supplement it with a higher output auxiliary heater.
• If hot water consumption increases, a
larger proportion of time is used to produce
hot water, which means less time for heat
production (only applies to VL-systems).
Problem – Too hot
Cause
Troubleshooting
Remedy
1. The heat pump’s control computer is
not set/adjusted to the customer’s requirements/wishes.
Check the ROOM and CURVE and MIN settings.
Adjust incorrect values in the heat pump’s
control computer.
ROOM = Desired indoor temperature.
CURVE = Should be set so that the desired
indoor temperature (ROOM) is maintained
regardless of the outdoor temperature.
MIN = Lowest set-point value on the supply
line regardless of the outdoor temperature.
2. Sensor fault, OUTDOOR/ROOM/Supply
line.
Check what the relevant sensor shows, is it
a plausible/actual value?
If the sensor is defective, replace it.
Measure the resistance of the sensor, check
against the ohm table in the Measurement
points section.
3. Defective 3-way valve motor. The motor
should set the valve to the relevant end
position depending on operating conditions. If it does not, hot water from the
water heater will mix with the radiator
water.
Check the function of the 3-way valve
motor by test running it manually. If the
motor does not shift mode during manual
test operation, check that there is voltage to
the motor, see wiring diagram.
Is the motor being supplied with voltage
according to the wiring diagram in both
operating instances?
MANUAL TEST – VXV HOT WATER
0=Radiator mode, arm out from valve.
1=Hot water mode, arm positioned towards
the valve.
If there is voltage to the motor but the arm
does not shift mode, replace it.
4. Jammed 3-way valve insert.
If the insert is not sealed, hot water from
the water heater will mix with the radiator
water.
Detach the motor and test closing and
opening of the valve by pressing the control arm.
VMBMA502
Take out and clean the jammed insert, or
replace with a new insert.
77
Problem – Irregular indoor temperature
Cause
Troubleshooting
Remedy
1. The heat pump’s control computer is
not set/adjusted to the customer’s requirements/wishes.
Check the ROOM and CURVE, MIN, MAX
CURVE5, CURVE0, CURVE‑5 and HEATSTOP
settings.
Adjust incorrect values in the heat pump’s
control computer.
ROOM = Desired indoor temperature
CURVE = Should be set so that the desired
indoor temperature (ROOM) is maintained
regardless of the outdoor temperature.
MIN = Lowest set-point value on the supply
line regardless of the outdoor temperature
(on the condition that heat-stop does not
apply).
MAX = Highest set-point value on the supply line regardless of the outdoor temperature.
CURVE5,0,-5 = The supply temperature can
be adjusted up or down 5°C at these outdoor temperatures.
HEATSTOP = Stops all production of heat
when the outdoor temperature is the same
as or greater than the set value. To exit heatstop the outdoor temperature must drop to
3°C below the set value.
2. Incorrectly positioned/installed sensors.
Check that outdoor sensors and any room
sensors are installed according to the
instructions and that they are calibrated.
• Check that the room sensor is positioned
in a suitable place that is representative of
the building and calibrate it if necessary.
Avoid placing near external doors, windows
and heat sources.
• Install the outdoor sensor according to the
instructions and calibrate it, if necessary.
OTHER
Problem – The heat pump runs and runs but never stops
Cause
Troubleshooting
Remedy
1. Air in the heating system.
Listen for air in the heat pump and heating
system.
Bleed the heating system circuit according
to the installation instructions.
2. Lack of refrigerant, not enough refrigerant in the system.
Using manometer apparatus and thermometer, check that the unit’s overheating is
correct for the specific refrigerant.
Follow the correct procedure (depending
on type of refrigerant) to add the correct
amount of refrigerant.
If there appears to be a leak in the refrigerant circuit, carry out leak tracing and any
necessary corrective action. If leak tracer
is not available, brush soap water on the
suspected leak and look for bubbles. Also
check for oil as this can come out from the
refrigerant circuit.
3. Changed conditions. Have you increased
your heating and/or hot water demand?
• If the heat pump has been dimensioned
for a certain demand and this demand is
increased, the heat pump might not be able
to maintain the desired room temperature.
• If hot water consumption increases, a
larger proportion of time is used to produce
hot water, which means less time for heat
production (only applies to VL-systems).
78
VMBMA502
If the heat pump cannot cope with the
demand, replace it with one with a higher
output or supplement it with a higher output auxiliary heater.
Problem – Runs on electric heating element
Cause
Troubleshooting
Remedy
1. Operating mode ADD.HEAT is selected.
If this operating mode is selected, the auxiliary heater is used for heating and hot
water production, not the compressor.
If ADD.HEAT mode is selected and you no
longer want it, change to AUTO, the heat
pump then controls both the compressor
and auxiliary heater.
2. The compressor cannot run due to an
alarm.
Check the alarm that is indicated in the
display.
Rectify the problem and rest the alarm. See
the Operational problem – Alarm, section.
3. The integral value has reached the start
level for the auxiliary heater.
Check what the integral value is in the control computer.
If the auxiliary heater is in operation
because the integral value has counted
down to the start value, the computer
reacts as it should, see the Heat pump for
further information.
4. Peak heat operation (legionella function)
is running.
Check if the heat pump runs peak heat. See
the instructions for the relevant model.
Peak heat operation occurs in connection
with hot water production with the set
interval. The compressor should then start
to produce hot water and 2 minutes later
the auxiliary heater starts, the compressor
should then stop and the stop temperature
is reached with only the auxiliary heater
connected. Take no corrective action.
5. The heat pump has stopped on HIGH
RETURN.
• Check what the MAX RETURN value is set
at in the heat pump’s control computer. It
must be adjusted to the unit’s maximum
supply temperature and the system’s delta
temperature so that it does not cut at too
high a return temperature when the highest
supply temperature is transmitted.
If the MAX RETURN value is not adjusted for
the system according to the troubleshooting window, adjust it.
If the sensor is defective, replace it.
• Check what the return line sensor shows,
is it a plausible/actual value? If not, take
a resistance reading from the sensors
and check against the ohm table in the
Measurement points section.
6. The compressor runs backwards. The
incoming phases have the incorrect
sequence (only applies to 3-phase heat
pumps).
If the compressor runs backwards, it will
not cope with compressing the refrigerant
and therefore does not produce the correct
power, which leads to the control computer
requesting auxiliary heating.
• If the text ERR PHASE SEQ appears in the
display when the heat pump is powered,
(only appears in the first 10 minutes) this
means that the phases have the incorrect
sequence.
If the phases are in the incorrect order,
switch two incoming phases at the main
terminal block and recheck according to the
troubleshooting window.
• When the compressor is running, check
the delivery pipe temperature by feeling
the delivery pipe that should be hot (not
just warm) even a little distance from the
compressor if the phases are correctly
sequenced.
• When the compressor runs with the phases incorrectly sequenced a strange noise
may be heard (loud, rattling) when the
compressor runs backwards.
7. Changed conditions. Have you increased
your heating and/or hot water demand?
• If the heat pump has been dimensioned
for a certain demand and this demand is
increased, the heat pump might not be able
to maintain the desired room temperature.
If the heat pump cannot cope with the
demand, replace it with one with a higher
output or supplement it with a higher output auxiliary heater.
• If hot water consumption increases, a
larger proportion of time is used to produce
hot water, which means less time for heat
production (only applies to VL-systems).
VMBMA502
79
Problem – The auxiliary heater is in operation but not the compressor
Cause
Troubleshooting
Remedy
1. Operating mode ADD.HEAT is selected.
If this operating mode is selected, the auxiliary heater is used for heating and hot
water production, not the compressor.
If ADD.HEAT mode is selected and you no
longer want it, change to AUTO, the heat
pump then controls both the compressor
and auxiliary heater.
2. Peak heat operation (legionella function)
is running.
Check if the heat pump runs peak heat. See
the instructions for the relevant model.
Peak heat operation occurs in connection
with hot water production with the set
interval. The compressor should then start
to produce hot water and 2 minutes later
the auxiliary heater starts, the compressor
should then stop and the stop temperature
is reached with only the auxiliary heater
connected. Take no corrective action, this is
normal.
3. The compressor cannot run due to an
alarm.
Check the alarm that is indicated in the
display.
Rectify the problem and rest the alarm. See
the Operational problem – Alarm, section.
4. The heat pump has stopped on high
return.
• Check what the MAX value is set at in the
heat pump’s control computer. It must be
adjusted to the unit’s maximum supply
temperature and the system’s delta temperature so that it does not cut at too high
a return temperature when the highest supply temperature is transmitted.
• If the MAX RETURN value is not adjusted
for the system according to the troubleshooting window, adjust it.
• If the sensor is defective, replace it.
• Check what the return line sensor shows,
is it a plausible/actual value? If not, take
a resistance reading from the sensors
and check against the ohm table in the
Measurement points section.
5. The compressor has been stopped by the
operating pressure switch or delivery pipe
sensor.
Check if a square appears in the display’s
lower let corner, if so, the operating pressure switch is open or the delivery pipe
sensor triggers an alarm for too high temperature.
If the operating pressure switch has stuck in
the open position, try gently tapping on the
pressure switch head. If this does not help,
or it sticks in the open position repeatedly,
replace the pressure switch.
• The operating pressure switch is most easily checked by using a buzzer to see if it is
connected.
If the delivery pipe sensor is defective,
replace it.
• The delivery pipe sensor value is read
off from the control computer in the
HEATPUMP menu. Is it a plausible/actual
value? If not, take a resistance reading from
the sensor and check against the ohm table
in the Measurement points section.
• The compressor has been stopped by the
delivery pipe sensor and you have established that it shows the correct temperature. This may have been caused by a leak
in the refrigerant circuit.
6. The built-in overheating protection (bimetal protection) in the compressor has
tripped.
80
Check if the heat pump’s control computer
indicates that the compressor is in operation, and if there is voltage between softstarters A1 and A2. Then read off and check
that there is voltage on the compressor’s
three electrical connections (L1, L2 and L3).
VMBMA502
If the delivery pipe temperature gets so hot
that the compressor stops, start by leaktracing the unit. Rectify the leak, if a leak is
found. If no leak is found, try draining and
refilling the unit and then restarting the
heat pump and seeing what the delivery
pipe temperature is. If the problem persists,
replace the compressor.
If there is voltage on the compressor’s three
electrical connections and the overheating
protection does not close when the compressor has not run and has cooled down
for at least 1 hour, replace the compressor.
Cause
Troubleshooting
Remedy
7. The compressor runs backwards. The
incoming phases have the incorrect
sequence (only applies to 3-phase heat
pumps). If the compressor runs backwards,
it will not cope with compressing the refrigerant and therefore does not produce the
correct power, which leads to the control
computer requesting auxiliary heating.
• If the text ERR PHASE SEQ appears in the
display when the heat pump is powered,
(only appears in the first 10 minutes) this
means that the phases have the incorrect
sequence.
If the phases are in the incorrect order,
switch two incoming phases at the main
terminal block and recheck according to the
troubleshooting window.
• When the compressor is running, check
the delivery pipe temperature by feeling
the delivery pipe that should be hot (not
just warm) even a little distance from the
compressor if the phases are correctly
sequenced.
• When the compressor runs with the phases incorrectly sequenced a strange noise
may be heard (loud, rattling) when the
compressor runs backwards.
Problem – The heat pump consumes too much energy
Cause
Troubleshooting
Remedy
1. Blocked strainer in the heating system.
Check that the strainer is not blocked.
Clean the strainer if necessary.
2. The compressor cannot run due to an
alarm.
Check the alarm that is indicated in the
display.
Rectify the problem and rest the alarm. See
the Operational problem – Alarm, section.
3. Incorrect flow over hot side of the heat
pump.
Measurement check what the difference
between the supply and return line is using
a thermometer (∆t). The difference should
be about 7-10°C (can vary depending on
refrigerant). A lower ∆t results in reduced
efficiency in the heat pump.
Adjust the system to obtain the correct ∆t.
4. Incorrect flow in the brine circuit.
Measurement check what the difference
between the supply and return line is using
a thermometer (∆t). The difference should
not be more than 4°C. A greater ∆t results in
reduced efficiency in the heat pump.
If the difference is greater than 4°C note
what is causing it. E.G.: Dirt in the filter, system restrictions, system with high pressure
drop.
5. The heat pump’s control computer is
not set/adjusted to the customer’s requirements/wishes.
Check the ROOM and CURVE and MIN settings.
Adjust incorrect values in the heat pump’s
control computer.
ROOM = Desired indoor temperature.
CURVE = Should be set so that the desired
indoor temperature (ROOM) is maintained
regardless of the outdoor temperature.
MIN = Lowest set-point value on the supply
line regardless of the outdoor temperature.
6. The interval for peak heat operation has
changed to a lower value than the factory
set value. This results in the heat pump
going into peak heat operation more often
than calculated.
Check the specified interval for peak heat
operation in the control computer, see
instructions for relevant model.
If there is a shorter interval between the
peak heat productions, this explains why
the unit consumes more current than calculated, but this does not mean for sure that it
should be increased, there might be a reason why the interval has been changed.
7. The heat pump has stopped on HIGH
RETURN.
• Check what the MAX RETURN value is set
at in the heat pump’s control computer. It
must be adjusted to the unit’s maximum
supply temperature and the system’s delta
temperature so that it does not cut at too
high a return temperature when the highest
supply temperature is transmitted.
If the MAX RETURN value is not adjusted for
the system according to the troubleshooting window, adjust it.
If the sensor is defective, replace it.
• Check what the return line sensor shows,
is it a plausible/actual value? If not, take
a resistance reading from the sensors
and check against the ohm table in the
Measurement points section.
VMBMA502
81
Cause
Troubleshooting
Remedy
8. The compressor runs backwards. The
incoming phases have the incorrect
sequence (only applies to 3-phase heat
pumps). If the compressor runs backwards,
it will not cope with compressing the refrigerant and therefore does not produce the
correct power, which leads to the control
computer requesting auxiliary heating.
• If the text ERR PHASE SEQ appears in the
display when the heat pump is powered,
(only appears in the first 10 minutes) this
means that the phases have the incorrect
sequence.
If the phases are in the incorrect order,
switch two incoming phases at the main
terminal block and recheck according to the
troubleshooting window.
• When the compressor is running, check
the delivery pipe temperature by feeling
the delivery pipe that should be hot (not
just warm) even a little distance from the
compressor if the phases are correctly
sequenced.
• When the compressor runs with the phases incorrectly sequenced a strange noise
may be heard (loud, rattling) when the
compressor runs backwards.
9. The compressor has been stopped by the
operating pressure switch or delivery pipe
sensor.
Check if a square appears in the display’s
lower let corner, if so, the operating pressure switch is open or the delivery pipe
sensor triggers an alarm for too high temperature.
If the operating pressure switch has stuck in
the open position, try gently tapping on the
pressure switch head. If this does not help,
or it sticks in the open position repeatedly,
replace the pressure switch.
• The operating pressure switch is most easily checked by using a buzzer to see if it is
connected.
If the delivery pipe sensor is defective,
replace it.
• The delivery pipe sensor value is read
off from the control computer in the
HEATPUMP menu. Is it a plausible/actual
value? If not, take a resistance reading from
the sensor and check against the ohm table
in the installation instructions.
• The compressor has been stopped by the
delivery pipe sensor and you have established that it shows the correct temperature. This may have been caused by a leak
in the refrigerant circuit.
10. Expansion valve defective or incorrectly
set.
Using manometer apparatus and thermometer check what the overheating reading of
the unit is.
Also check that bulb and capillary tube are
undamaged and that the bulb is correctly
installed.
11. Lack of refrigerant, not enough refrigerant in the system.
Using manometer apparatus and thermometer, check that the unit’s overheating is
correct for the specific refrigerant.
If the delivery pipe temperature gets so hot
that the compressor stops, start by leaktracing the unit. Rectify the leak, if a leak is
found. If no leak is found, try draining and
refilling the unit and then restarting the
heat pump and seeing what the delivery
pipe temperature is. If the problem persists,
replace the compressor.
If the overheating reading does not correspond with the instructions for the specific
refrigerant, adjust the expansion valve until
the correct value is obtained. See separate
instructions for cooling techniques.
If overheating cannot be adjusted with the
expansion valve or if the capillary tube/bulb
is damaged, replace it.
Follow the correct procedure (depending
on type of refrigerant) to add the correct
amount of refrigerant.
If there appears to be a leak in the refrigerant circuit, carry out leak tracing and any
necessary corrective action. If leak tracer
is not available, brush soap water on the
suspected leak and look for bubbles. Also
check for oil as this can come out from the
refrigerant circuit.
12. Overfilled refrigerant circuit.
Using manometer apparatus and thermometer, check that the unit’s overheating is
correct for the specific refrigerant.
If cooling is not at the correct level compared with the specific refrigerant and is
too high, there is too much refrigerant
in the unit. Follow the correct procedure
(depending on type of refrigerant) to add
the correct amount of refrigerant.
13. Short active collector, e.g. short or dry
bore hole, short surface soil collector.
• Check the length of the collector that is
being used and compare with the collector
length in the dimensioning documentation.
If the active collector is too short, the heat
pump cannot receive enough energy from
the heat source, which results in it requiring
an addition to cover the energy requirement.
• In addition, check that the collector is
not suspended ”in free air” if boreholes are
used.
82
VMBMA502
Cause
Troubleshooting
Remedy
14. Changed conditions. Have you increased • If the heat pump has been dimensioned
your heating and/or hot water demand?
for a certain demand and this demand is
increased, the heat pump might not be able
to maintain the desired room temperature.
If the heat pump cannot cope with the
demand, replace it with one with a higher
output or supplement it with a higher output auxiliary heater.
• If hot water consumption increases, a
larger proportion of time is used to produce
hot water, which means less time for heat
production (only applies to VL-systems).
Problem – Auxiliary heater cuts in too soon
Cause
Troubleshooting
Remedy
1. The heat pump’s control computer is
not set/adjusted to the customer’s requirements/wishes.
Check the ROOM, CURVE, INTEGRAL A1 and
INTEGRAL A2 settings
Adjust incorrect values in the heat pump’s
control computer.
ROOM = Desired indoor temperature.
CURVE = Should be set so that the desired
indoor temperature (ROOM) is maintained
regardless of the outdoor temperature.
INTEGRAL A1 = Start value for the compressor.
INTEGRAL A2 = Start value (calculated from
A1) for the auxiliary heater.
2. Lack of refrigerant, not enough refrigerant in the system.
Using manometer apparatus and thermometer, check that the unit’s overheating is
correct for the specific refrigerant.
Follow the correct procedure (depending
on type of refrigerant) to add the correct
amount of refrigerant.
If there appears to be a leak in the refrigerant circuit, carry out leak tracing and any
necessary corrective action. If leak tracer
is not available, brush soap water on the
suspected leak and look for bubbles. Also
check for oil as this can come out from the
refrigerant circuit.
3. Short active collector, e.g. short or dry
bore hole, short surface soil collector.
• Check the length of the collector that is
being used and compare with the collector
length in the dimensioning documentation.
• In addition, check that the collector is
not suspended ”in free air” if boreholes are
used.
If the active collector is too short, the heat
pump cannot receive enough energy from
the heat source, which results in it requiring
an addition to cover the energy requirement.
4. Collector too long, pressure drop too
great.
Check the length of the collector that is
being used and that it is connected in parallel (not connected in series) if more than 1
coil is being used.
If a longer collector is being used than
recommended for the specific heat pump,
it must be divided on several parallel connected coils.
5. Changed conditions. Have you increased
your heating and/or hot water demand?
• If the heat pump has been dimensioned
for a certain demand and this demand is
increased, the heat pump might not be able
to maintain the desired room temperature.
If the heat pump cannot cope with the
demand, replace it with one with a higher
output or supplement it with a higher output auxiliary heater.
• If hot water consumption increases, a
larger proportion of time is used to produce
hot water, which means less time for heat
production (only applies to VL-systems).
VMBMA502
83
Problem – Short operating times despite heating demand
Cause
Troubleshooting
Remedy
ROOM and/or CURVE set too high in combination with a heating system with poor
circulation due to closed radiator valves, too
small elements or insufficient water volume.
A tight fitting system with poor pipe dimensions may produce the same phenomena.
Check if the heat pumps starts, if the supply
temperature rises quickly whilst nothing
happens to the return temperature.
Adjust ROOM and CURVE if necessary,
ensure that there is sufficient flow over the
condenser and the heating circuit.
If this happens and the heat pump is
stopped by the hysteresis function to later
drop in temperature (supply) as quickly to
start again, but cannot due to time conditions in regulation, this means that the heat
pump cannot transport the heat away from
the condenser as it should.
In such a case, hysteresis starts and stops
the heat pump often.
Problem – Connection of external AH
Cause
Troubleshooting
Remedy
Incorrectly connected auxiliary heater. Does
not start when the control computer gives
the signal.
Check the connection against the instructions/wiring diagram. Test the function in
manual mode.
If the auxiliary heater is incorrectly connected, reconnect according to the instructions.
Cause
Troubleshooting
Remedy
1. Positioning the outdoor unit.
Determine whether the outdoor unit can be When positioning the outdoor unit, its
moved to a more suitable location.
direction does not affect its performance.
The outdoor unit does not need to be positioned as close to the heat pump as necessary, it can be positioned as far as 30 ”pipe
metres” way.
2. Connection/wall lead-ins.
Check that the unit is installed according to
the instructions.
OUTDOOR UNIT
Problem – Noise/loud noise
Rigid mountings can generate noise from
the outdoor section via walls in the house.
Is the outdoor unit secured to the wall?
Problem – Defrosting problems
Cause
Troubleshooting
Remedy
1. Location/calibration of the outdoor sensor.
Check that the outdoor sensor is installed
according to the installation instructions
and that it is correctly calibrated.
Install according to the instructions and
calibrate, if necessary. Alternatively, the
outdoor sensor can be located behind the
outdoor unit 20 cm out from the rear side of
the outdoor unit.
2. Brine temperature in/out.
Measurement check the temperatures with
a thermometer.
If necessary, calibrate BRINE IN and BRINE
OUT in the heat pump’s control computer.
3. The defroster shunt does not regulate as
it should.
Manually test to check if the defroster
shunt opens and closes the flow over the
defroster tank.
If the motor is defective, replace it.
If the motor switches position when testing, but defrosting still does not function,
remove the motor and try closing and
opening the valve by hand by pressing in
the control arm.
84
VMBMA502
If the insert jams, remove and clean/lubricate it, or replace it.
Problem – Build-up of ice under and around the outdoor unit
Cause
Troubleshooting
Remedy
Insufficient drainage.
Does a lot of ice accumulate under and
around the outdoor unit because the melted water has no where to run?
Drain the ground under and around the
outdoor section
or
Install a drip tray with a drainpipe routed
to an indoor drain or gully. NOTE! A heating cable may have to be installed in the
drainpipe.
Problem – Water run-off by the outdoor unit, risk of moisture problems in house foundations
Cause
Troubleshooting
Remedy
Insufficient drainage.
During some periods when the outdoor
unit is being defrosted, large amounts (2040 L/day) of water can run off.
Drain the ground under and around the
outdoor unit so that it can cope with the
extra amount of water produced because of
defrosting
or
Install a drip tray with a drainpipe routed
to an indoor drain or gully. NOTE! A heating cable may have to be installed in the
drainpipe.
VMBMA502
85
16 Technical data
DHP-A, DHP-AL
Refrigerant
Type
Amount
8
10
12
R404A
1,45
R404A
1,50
R404A
1,60
3,4
kg
Test pressure
MPa
3,4
3,4
3,4
Design pressure
MPa
3,1
3,1
3,1
3,1
Scroll
POE
Scroll
POE
Scroll
POE
Scroll
POE
Volt
kW
400V 3N ~50Hz
2,00
400V 3N ~50Hz
2,30
400V 3N ~50Hz
3,60
400V 3N ~50Hz
4,40
Power input, circ.pumps 1
W
Auxiliary heater, 3 steps
kW
0,43
3 / 6 / 9 / 12 / 15
0,61
3 / 6 / 9 / 12 / 15
0,66
3 / 6 / 9 / 12 / 15
0,7
3 / 6 / 9 / 12 / 15
Start current
A
14,0
25,0
29,0
32,0
Total current 1
A
Circuit breaker
A
103/164/205/206/
257/2514/3015
163/164/205/206/
257/2514/3015
163/164/205/206/
257/3014/3515
163/204/255/256/
257/3014/3515
Volt
kW
230V 1N ~50Hz
3,3
230V 1N ~50Hz
4,2
230V 1N ~50Hz
5,4
230V 1N ~50Hz
5,7
Compressor
Type
Oil
Electrical data
3-N~50Hz
Main supply
Total power input 1
Electrical data
1-N~50Hz
6
R404A
0,95
Main supply
Total power input 1
Power input, circ.pumps
W
0,3
0,48
0,48
0,52
Auxiliary heater, 3 steps
kW
1,5 / 3,0 / 4,5
1,5 / 3,0 / 4,5
1,5 / 3,0 / 4,5
1,5 / 3,0 / 4,5
Start current
A
58
76
97
108
Total current 1
A
253/324/405
253/324/405
323/404/505
323/404/505
Circuit breaker
A
5,00
7,02
8,20
9,84
kW
COP
2,85
5,90
3,1
7,96
2,85
9,85
3
11,3
Output capacity 2
kW
3,26
3,40
3,29
3,40
Heat factor 2
COP
1,8
2,3
3,0
3,4
Nominal flow 8
Cooling circuit
Heating circuit
l/s
l/s
0,32
0,49
0,58
0,64
Pressure drop
Condensor
Evaporator
kPa
kPa
0.14
7
0.20
8
0.24
9
0.28
15
External available
pressure 9
Cooling circuit
Heating circuit
kPa
kPa
21
46
31
83
44
69
17
95
46
-20
43
-20
42
-20
34
-20
Performance
Output capacity 1
Heat factor 1
Lowest outdoor temperature allowed for
compressor start
oC
Max/min temperature Cooling circuit
Heating circuit
oC
oC
20/-25
59 / 20
20/-25
59 / 20
20/-25
59 / 20
20/-25
59 / 20
Low pressure
Operating
MPa
MPa
0,08
2.65 / 2.85
0,08
2.65 / 2.85
0,08
2.65 / 2.85
0,08
2.65 / 2.85
High pressure
MPa
3,1
3,1
3,1
3,1
l
l
1,22
1,00
2,11
1,22
2,66
1,22
2,66
1,55
Fan speed outdoor unit,low/high
Air flow
rpm
m3/h
500 / 650
2500 / 3200
500 / 650
2500 / 3200
500 / 800
2500 / 3900
500 / 800
2500 / 3900
Sound power level 10
dB(A)
53 / 63
53 / 63
54 / 67
54 / 67
90 / 130
90 / 130
120 / 180
120 / 180
41 / 51
27 / 37
41 / 51
27 / 37
42 / 55
28 / 41
42 / 55
28 / 41
Pressure switches
Water volume
Condensor
Evaporator
Fan power input
W
Sound pressure level 1 m 13
away from outdoor
4 m 13
unit 11
8 m 14
16 m 14
Max.pipe lenght (Cu pipe Ø28mm between heat
pump and outdoor unit)
dB(A)
dB(A)
dB(A)
dB(A)
21 / 31
21 / 31
22 / 35
22 / 35
m
210 (105+105)
131 (65+65)
70 (35+35)
76 (38+38)
Etylenglykol
Etylenglykol
Etylenglykol
Etylenglykol
180
260 / 94
180
260 / 94
180
260 / 94
180
268 / 94
154 / 120
154 / 120
154 / 120
162 / 120
Anti freeze media 12
Water heater volume
l
Weight / outdoor unit
Weight
kg
kg
The measurements are performed on a limited number of heat pumps
which can cause variations in the results. Tolerances in the measuring
methods can also cause variations.
1)
At A2W35 according to EN 14511 (including circulation pumps and
outdoor unit).
2)
At A7W35 according to EN 14511 (including circulation pumps and
outdoor unit).
3)
Heat pump with 3 kW auxiliary heater (1-N 1.5 kW).
4)
Heat pump with 6 kW auxiliary heater (1-N 3 kW).
5)
Heat pump with 9 kW auxiliary heater (1-N 4.5 kW).
6)
12 kW auxiliary heater (compressor off).
7)
15 kW auxiliary heater (compressor off).
86
Nominal flow: heating circuit Δ10K, cooling circuit Δ3K.
9)
Pressure drop that must not be exceeded outside the heat pump without the nominal flow being reduced.
10)
Sound power level (outdoor unit) measured according to EN ISO 3741.
11)
Sound pressure level calculated according to EN ISO 11203.
12)
For DHP-A, -AL models, do not use propylene glycol or ethanol.
13)
Calculated from sound power level with the assumption of a semispherical propagation from a point source.
14)
12 kW auxiliary heater (compressor allowed).
15)
15 kW auxiliary heater (compressor allowed).
8)
VMBMA502
DHP-A Opti, DHP-AL Opti
Refrigerant
Type
Amount
10
12
R404A
1.50
R404A
1.60
3.4
kg
MPa
3.4
3.4
3.4
Design pressure
MPa
3.1
3.1
3.1
3.1
Scroll
POE
Scroll
POE
Scroll
POE
Scroll
POE
400
2.0
400
2.30
400
3.60
400
4.40
Type
Oil
Electrical data
3-N~50Hz
Main supply
Total power input 1
Volt
kW
Power input, circ.pumps 1
W
0.41
0.41
0.46
0.63
Auxiliary heater, 3 steps
kW
3/6/9/12/15
3/6/9/12/15
3/6/9/12/15
3/6/9/12/15
Start current
A
14.0
25.0
29.0
32.0
Total current 1
A
Circuit breaker
A
103/164/205/206/
257/2514/3015
163/164/205/206/
257/2514/3015
163/164/205/ 206/
257/3014/3515
163/204/255/ 256/
257/3014/3515
Volt
kW
230
3.3
230
4.2
230
5.4
230
5.7
Main supply
Total power input 1
Power input, circ.pumps
W
0.41
0.41
0.46
0.63
Auxiliary heater, 3 steps
kW
1.5/3/4.5
1.5/3/4.5
1.5/3/4.5
1.5/3/4.5
Start current
A
58
76
97
108
Total current 1
A
A
253/324/405
253/324/405
323/404/505
323/404/505
kW
COP
5.00
2.85
7.02
3.10
8.20
2.85
9.84
3.00
Circuit breaker
Performance
8
R404A
1.45
Test pressure
Compressor
Electrical data
1-N~50Hz
6
R404A
0.95
Output capacity
Heat factor 1
1
Output capacity 2
kW
5.90
7.96
9.85
11.3
Heat factor 2
COP
3.26
3.40
3.29
3.40
Power input
kW
Cooling circuit
Heating circuit
l/s
l/s
Pressure drop
Condensor
Evaporator
kPa
kPa
External available
pressure 9
Cooling circuit
Heating circuit
kPa
kPa
oC
Nominal flow 8
Lowest outdoor temperature allowed for
compressor start
Max/min temperature Cooling circuit
Heating circuit
oC
oC
Pressure switches
Low pressure
Operating
MPa
MPa
High pressure
MPa
Water volume
Condensor
Evaporator
rpm
m3/h
Sound power level 10
dB(A)
Fan power input
Sound pressure level 1 m 13
away from outdoor
4 m 13
unit 11
8 m 14
16 m 14
Max.pipe lenght (Cu pipe Ø28mm between heat
pump and outdoor unit)
2.3
3.0
3.4
0.30
0.20
0.60
0.24
0.5
0.28
7
21
8
31
9
44
15
17
88
103
74
43
56
42
98
34
-20
-20
-20
-20
20/-25
59/20
20/-25
59/20
20/-25
59/20
20/-25
59/20
0.08
2.65/2.85
0.08
2.65/2.85
0.08
2.65/2.85
0.08
2.65/2.85
3.1
3.1
3.1
3.1
1.22
1.00
2.11
1.22
2.66
1.22
2.66
1.55
500/650
2500/3200
500/650
2500/3200
500/800
2500/3900
500/800
2500/3900
l
l
Fan speed outdoor unit,low/high
Air flow
1.8
0.20
0.14
W
53/63
53/63
54/67
54/67
dB(A)
dB(A)
90/130
90/130
120/180
120/180
41/51
27/37
451/51
27/37
42/55
28/41
42/55
28/41
dB(A)
dB(A)
21/31
21/31
22/35
22/35
m
210 (105+105)
131 (65+65)
70 (35+35)
76 (38+38)
Etylenglykol/
Etanol
Etylenglykol/
Etanol
Etylenglykol/
Etanol
Etylenglykol/
Etanol
Anti freeze media 12
Water heater volume
l
180
180
180
180
Weight / outdoor unit
Weight
kg
kg
260/94
154/120
260/94
154/120
260/94
154/120
268/94
162/120
The measurements are performed on a limited number of heat pumps
which can cause variations in the results. Tolerances in the measuring
methods can also cause variations.
1)
At A2W35 according to EN 14511 (including circulation pumps and
outdoor unit).
2)
At A7W35 according to EN 14511 (including circulation pumps and
outdoor unit).
3)
Heat pump with 3 kW auxiliary heater (1-N 1.5 kW).
4)
Heat pump with 6 kW auxiliary heater (1-N 3 kW).
5)
Heat pump with 9 kW auxiliary heater (1-N 4.5 kW).
6)
12 kW auxiliary heater (compressor off).
7)
15 kW auxiliary heater (compressor off).
Nominal flow: heating circuit Δ10K, cooling circuit Δ3K.
Pressure drop that must not be exceeded outside the heat pump without the nominal flow being reduced.
10)
Sound power level (outdoor unit) measured according to EN ISO 3741.
11)
Sound pressure level calculated according to EN ISO 11203.
12)
For DHP-A, -AL models, do not use propylene glycol or ethanol.
13)
Calculated from sound power level with the assumption of a semispherical propagation from a point source.
14)
12 kW auxiliary heater (compressor allowed).
15)
15 kW auxiliary heater (compressor allowed).
8)
9)
VMBMA502
87
DHP-H, DHP-L
Refrigerant
Type
Amount
8
10
12
16
R407C
1,3
R407C
1,45
R407C
1,55
R407C
2
3,4
kg
MPa
3,4
3,4
3,4
3,4
3,4
Design pressure
MPa
3,1
3,1
3,1
3,1
3,1
3,1
Scroll
POE
Scroll
POE
Scroll
POE
Scroll
POE
Scroll
POE
Scroll
POE
400
2,7
400
2
400
2,3
400
3,6
400
4,4
400
5,6
Type
Oil
Electrical data
3-N~50Hz
Main supply
Total power input 1
Volt
kW
Power input, circ.pumps 1
W
0,2
0,3
0,3
0,5
0,6
0,6
Auxiliary heater, 3 steps
kW
3/6/9
3/6/9
3/6/9
3/6/9
3/6/9
3/6/9
Start current
A
17
12
10
18
17
18
Total current 1
A
Circuit breaker
A
1x169
104/105/166
104/165/206
164/165/206
164/165/206
164/205/256
204/205/256
Volt
kW
230
2,7
230
3,3
230
4,2
230
5,4
230
5,7
*
*
Main supply
Total power input 1
Power input, circ.pumps
W
0,2
0,3
0,3
0,5
0,6
*
Auxiliary heater, 3 steps
kW
1,5/3,0/4,5
1,5/3,0/4,5
1,5/3,0/4,5
1,5/3,0/4,5
1,5/3,0/4,5
*
Start current
A
19
58
76
97
108
*
Total current 1
A
A
204/255/326
254/325/406
254/325/406
324/405/506
324/405/506
*
kW
COP
3,52
3,90
5,33
4,04
7,51
4,34
9,40
4,24
11,00
4,20
16,8
4,19
Circuit breaker
Performance
6
R407C
1,2
Test pressure
Compressor
Electrical data
1-N~50Hz
4
R407C
0,75
Output capacity
Heat factor 1
1
Output capacity 2
kW
3,42
5,38
7,40
9,24
10,60
16,3
Heat factor 2
COP
3,05
3,41
3,57
3,51
3,39
3,51
Power input
kW
0,90
1,32
1,73
2,22
2,62
4,01
Nominal flow 6
Cooling circuit
Heating circuit
l/s
l/s
0,20
0,09
0,36
0,14
0,49
0,19
0,62
0,24
0,71
0,28
1,02
0,39
External available
pressure 5
Cooling circuit
Heating circuit
kPa
kPa
37
52
39
51
39
44
78
40
70
59
37
54
Max/min temperature Cooling circuit
Heating circuit
oC
oC
20/-10
60/20
20/-10
60/20
20/-10
60/20
20/-10
60/20
20/-10
60/20
20/-10
60/20
Low pressure
Operating
MPa
MPa
0,08
2.65/2.85
0,08
2.65/2.85
0,08
2.65/2.85
0,08
2.65/2.85
0,08
2.65/2.85
0,08
2.65/2.85
High pressure
MPa
3,1
3,1
3,1
3,1
3,1
3,1
l
l
0,78
0,67
1,55
0,67
1,89
1,22
2,11
1,55
2,11
1,55
2,89
2,22
Etylenglykol/
Etanol
Etylenglykol/
Etanol
Etylenglykol/
Etanol
Etylenglykol/
Etanol
Etylenglykol/
Etanol
Etylenglykol/
Etanol
Pressure switches
Water volume
Condensor
Evaporator
Anti freeze media 12
Water heater volume 8
Weight
l
180
180
180
180
180
180
kg
225/140
229/145
229/150
229/155
238/165
242/175
The measurements are performed on a limited number of heat pumps which can cause variations in the
results. Tolerances in the measuring methods can also cause variations.
1)
According to IEC61000 (including circulation pumps).
2)
At B0W35 according to EN 14511 (including circulation pumps).
3)
At B0W45 according to EN 14511 (including circulation pumps).
4)
Heat pump with 3 kW auxiliary heater (1-N 1.5 kW).
5)
Heat pump with 6 kW auxiliary heater (1-N 3 kW).
6)
Heat pump with 9 kW auxiliary heater (1-N 4.5 kW).
7)
Pressure drop that must not be exceeded outside the heat pump without the nominal flow being reduced.
For the cooling circuit these values require a pipe of Ø 40x2.4.
8)
Nominal flow: heating circuit Δ10K, cooling circuit Δ3K.
9)
Fuse protection phase L1 (size 4 is equipped with an 1-phase compressor)
10)
Only DHP-H.
*) Not available in 230V 1-N version.
88
VMBMA502
DHP-L Opti
Refrigerant
Type
Amount
10
12
16
R407C
1,45
R407C
1,55
R407C
2
3,4
kg
MPa
3,4
3,4
3,4
3,4
Design pressure
MPa
3,1
3,1
3,1
3,1
3,1
Scroll
POE
Scroll
POE
Scroll
POE
Scroll
POE
Scroll
POE
400
2
400
2,3
400
3,6
400
4,4
400
5,6
Type
Oil
Electrical data
3-N~50Hz
Main supply
Total power input 1
Performance
8
R407C
1,3
Test pressure
Compressor
Electrical data
1-N~50Hz
6
R407C
1,2
Volt
kW
Power input, circ.pumps 1
W
0,28
0,28
0,28
0,28
0,45
Auxiliary heater, 3 steps
kW
3/6/9
3/6/9
3/6/9
3/6/9
3/6/9
Start current
A
12
10
18
17
18
Circuit breaker
A
104/165/206
164/165/206
164/165/206
164/205/256
204/205/256
Volt
kW
230
3,3
230
4,2
230
5,4
230
5,7
*
*
Main supply
Total power input 1
Power input, circ.pumps
W
0,28
0,28
0,28
0,28
*
Auxiliary heater, 3 steps
kW
1,5/3,0/4,5
1,5/3,0/4,5
1,5/3,0/4,5
1,5/3,0/4,5
*
Start current
A
58
76
97
108
*
Circuit breaker
A
254/325/406
254/325/406
324/405/506
324/405/506
*
kW
COP
5,33
4,04
7,51
4,34
9,40
4,24
11,00
4,20
16,80
4,19
Output capacity 9
Heat factor
kW
5,38
7,40
9,24
10,60
16,26
COP
3,41
3,57
3,51
3,39
3,51
kW
1,32
1,73
2,22
2,62
4,01
Cooling circuit
Heating circuit
l/s
l/s
0,36
0,14
0,49
0,19
0,62
0,24
0,71
0,28
1,02
0,39
Cooling circuit
Heating circuit
kPa
kPa
80
105
80
103
63
100
45
102
52
96
Max/min temperature Cooling circuit
Heating circuit
oC
oC
20/-10
60/20
20/-10
60/20
20/-10
60/20
20/-10
60/20
20/-10
60/20
0,08
2.65/2.85
0,08
2.65/2.85
0,08
2.65/2.85
0,08
2.65/2.85
0,08
2.65/2.85
Nominal flow
6
External available
pressure 5
Pressure switches
Low pressure
Operating
MPa
MPa
High pressure
MPa
3,1
3,1
3,1
3,1
3,1
Water volume
Condensor
Evaporator
l
l
1,55
0,67
1,89
1,22
2,11
1,55
2,11
1,55
2,89
2,22
Etylenglykol/
Etanol
Etylenglykol/
Etanol
Etylenglykol/
Etanol
Etylenglykol/
Etanol
Etylenglykol/
Etanol
Anti freeze media
Water heater volume 9
Vikt
l
180
180
180
180
180
kg
229/145
229/150
229/155
238/165
242/175
The measurements are performed on a limited number of heat pumps which can cause variations in the
results. Tolerances in the measuring methods can also cause variations.
1)
According to IEC61000 (including circulation pumps).
2)
At B0W35 according to EN 14511 (including circulation pumps).
3)
At B0W45 according to EN 14511 (including circulation pumps).
4)
Heat pump with 3 kW auxiliary heater (1-N 1.5 kW).
5)
Heat pump with 6 kW auxiliary heater (1-N 3 kW).
6)
Heat pump with 9 kW auxiliary heater (1-N 4.5 kW).
7)
Pressure drop that must not be exceeded outside the heat pump without the nominal flow being reduced.
For the cooling circuit these values require a pipe of Ø 40x2.4.
8)
Nominal flow: heating circuit Δ10K, cooling circuit Δ3K.
9)
Fuse protection phase L1 (size 4 is equipped with an 1-phase compressor)
10)
Only DHP-H.
*) Not available in 230V 1-N version.
VMBMA502
89
DHP-H Opti Pro
Refrigerant
Type
Amount
kg
R407C
1,15
R407C
1,3
R407C
1,4
R407C
1,55
R407C
1,7
Test pressure
MPa
3,4
3,4
3,4
3,4
3,4
Design pressure
MPa
3,1
3,1
3,1
3,1
3,1
Scroll
POE
Scroll
POE
Scroll
POE
Scroll
POE
Scroll
POE
400
2
400
2,3
400
3,6
400
4,4
400
5,6
Compressor
Type
Oil
Electrical data
3-N~50Hz
Main supply
Total power input 1
Electrical data
1-N~50Hz
Performance
Volt
kW
Power input, circ.pumps 1
W
0,28
0,28
0,28
0,28
0,45
Auxiliary heater, 3 steps
kW
3/6/9
3/6/9
3/6/9
3/6/9
3/6/9
Start current
A
12
10
18
17
18
Total current 1
A
Circuit breaker
A
104/165/206
164/165/206
164/165/206
164/205/256
204/205/25
Volt
kW
230
3,3
230
4,2
230
5,4
230
5,7
*
*
Main supply
Total power input 1
Power input, circ.pumps
W
0,28
0,28
0,28
0,28
*
Auxiliary heater, 3 steps
kW
1,5/3,0/4,5
1,5/3,0/4,5
1,5/3,0/4,5
1,5/3,0/4,5
*
Start current
A
58
76
97
108
*
Total current 1
A
Circuit breaker
A
254/325/406
254/325/406
324/405/506
324/405/506
*
kW
COP
5,33
4,04
7,51
4,34
9,40
4,24
11,00
4,20
16,80
4,19
Output capacity 2
Heat factor 2
Output capacity 3
kW
5,38
7,40
9,24
10,60
16,26
Heat factor 3
COP
3,41
3,57
3,51
3,39
3,51
Power input
kW
1,32
1,73
2,22
2,62
4,01
Nominal flow 6
Cooling circuit
Heating circuit
l/s
l/s
0,36
0,14
0,49
0,19
0,62
0,24
0,71
0,28
1,02
0,39
External available
pressure 5
Cooling circuit
Heating circuit
kPa
kPa
80
105
80
103
63
100
45
102
52
96
Max/min temperature Cooling circuit
Heating circuit
oC
oC
20/-10
60/20
20/-10
60/20
20/-10
60/20
20/-10
60/20
20/-10
60/20
0,08
2.65/2.85
0,08
2.65/2.85
0,08
2.65/2.85
0,08
2.65/2.85
0,08
2.65/2.85
Pressure switches
Low pressure
Operating
MPa
MPa
High pressure
MPa
3,1
3,1
3,1
3,1
3,1
Water volume
Condensor
Evaporator
l
l
1,55
0,67
2,11
1,22
2,11
1,55
2,66
1,55
2,89
2,22
Hot gas heat exchanger
l
0,21
0,21
0,21
0,21
0,21
Etylenglykol/
Etanol
Etylenglykol/
Etanol
Etylenglykol/
Etanol
Etylenglykol/
Etanol
Etylenglykol/
Etanol
l
180
180
180
180
180
kg
231
231
231
240
244
Anti freeze media
Water heater volume 9
Weight
The measurements are performed on a limited number of heat pumps which can cause variations in the
results. Tolerances in the measuring methods can also cause variations.
1)
According to IEC61000 (including circulation pumps).
2)
At B0W35 according to EN 14511 (including circulation pumps).
3)
At B0W45 according to EN 14511 (including circulation pumps).
4)
Heat pump with 3 kW auxiliary heater (1-N 1.5 kW).
5)
Heat pump with 6 kW auxiliary heater (1-N 3 kW).
6)
Heat pump with 9 kW auxiliary heater (1-N 4.5 kW).
7)
Pressure drop that must not be exceeded outside the heat pump without the nominal flow being reduced.
For the cooling circuit these values require a pipe of Ø 40x2.4.
8)
Nominal flow: heating circuit Δ10K, cooling circuit Δ3K.
9)
Fuse protection phase L1 (size 4 is equipped with an 1-phase compressor)
10)
Only DHP-H.
*) Not available in 230V 1-N version.
90
VMBMA502
Appendix
VMBMA502
91