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INSTALLATION MANUAL
Indoor unit for air to water heat pump system
For installation WITH restricted power supply condition
=6 kW
EKHBHE008AA3V3
EKHBXE008AA3V3
1
1
1x
1
2
1x
3
1x
4
2x
5
1x
6
1x
7 8
2x 2x
2
300
≥ 350
500
2
3
1
G 1 1/2(male)
235
G 1 (male)
3
2
3
142
48
101
502
4
5
EKHBHE008AA3V3
EKHBXE008AA3V3
Indoor unit for air to water heat pump system
Installation manual
C
ONTENTS
Page
Introduction........................................................................................ 1
Accessories ....................................................................................... 3
Accessories supplied with the indoor unit .................................................. 3
Typical application examples ............................................................. 3
Overview of the indoor unit ................................................................ 5
Switch box main components .................................................................... 7
Installation of the indoor unit.............................................................. 8
Selecting an installation location................................................................ 8
Dimensions and service space .................................................................. 8
Inspecting, handling and unpacking the unit .............................................. 8
Installation of the EKHBDP drain pan kit (only for EKHBX models)........... 9
Start-up and configuration ............................................................... 14
DIP switch settings overview.................................................................... 14
Room thermostat installation configuration.............................................. 14
Pump operation configuration .................................................................. 15
Domestic hot water tank installation configuration ................................... 15
Initial start-up at low outdoor ambient temperatures................................ 15
Powering up the indoor unit ..................................................................... 16
Test run and final check ................................................................... 23
Test run operation (manual) ..................................................................... 23
Maintenance .................................................................................... 23
Troubleshooting ............................................................................... 24
Technical specifications ................................................................... 26
READ THESE INSTRUCTIONS CAREFULLY BEFORE
INSTALLATION. KEEP THIS MANUAL IN A HANDY
PLACE FOR FUTURE REFERENCE.
IMPROPER INSTALLATION OR ATTACHMENT OF
EQUIPMENT OR ACCESSORIES COULD RESULT IN
ELECTRIC SHOCK, SHORT-CIRCUIT, LEAKS, FIRE OR
OTHER DAMAGE TO THE EQUIPMENT. BE SURE ONLY
TO USE ACCESSORIES MADE BY DAIKIN WHICH ARE
SPECIFICALLY DESIGNED FOR USE WITH THE
EQUIPMENT AND HAVE THEM INSTALLED BY A
PROFESSIONAL.
IF UNSURE OF INSTALLATION PROCEDURES OR USE,
ALWAYS CONTACT YOUR DAIKIN DEALER FOR
ADVICE AND INFORMATION.
THE UNIT DESCRIBED IN THIS MANUAL IS DESIGNED
FOR INDOOR INSTALLATION ONLY AND FOR AMBIENT
TEMPERATURES RANGING 0°C~35°C.
I
NTRODUCTION
General information
Thank you for purchasing this
AD
indoor unit.
The AD indoor unit is the indoor part of the reversible air to water Daikin ERHQ heat pumps. These units are designed for wall mounted indoor installation and used for both heating and cooling applications. The units can be combined with
Daikinfan coil units, floor heating applications, low temperature radiators,domestic water heating applications and solar kit for domestic hot water applications.
Heating/cooling units and heating only units
The AD indoor unit range consists of two main versions: a heating/cooling (EKHBX) version and a heating only
(EKHBH) version.
Both versions are delivered with an integrated backup heater. The backup heater only serves as a backup in case of malfunctioning of the outdoor unit or when the unit is operating out of its operation range. If the unit is operating out of its operation range, the compressor will stop and the backup heater will function.
Indoor unit model
EKHB*E008AA3V3
Backup heater capacity
3 kW
Backup heater nominal voltage
1x 230 V
NOTE
An EKHBH/XE008
AA
3V3 indoor unit can only be connected to an outdoor ERHQ00*
AD
-series.
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system
4PW48441-1B
Installation manual
1
P
H
1
2
1
2
T
D
T
A
P
H
T
D
Heat pump capacity
Required heating capacity (site dependent)
Design temperature
Ambient (outdoor) temperature
Heating capacity
T
A
■
■
At selection of the heat pump, the heat pump capacity must match:
the required space heating capacity of the lowest expected outdoor ambient temperature.
AND
the domestic hot water demand when installing the optional domestic hot water tank.
The backup heater capacity and the optional booster heater capacity are not supplementary to the heat pump capacity. The total capacity of the system equals the capacity of the heat pump and not the sum of heat pump and backup heater capacity and the optional booster heater capacity.
Emergency backup heater operation always has priority over compressor or booster heater operation.
Emergency backup heater operation occurs because of:
■
User request to heat up water to the space heating loops. The temperature of this water is too low and is out of the operation range (during initial start-up for
"Initial start-up at low outdoor ambient temperatures" on page 15
and
"Re-start at low outdoor ambient temperatures" on page 15
■
During heating operation the water temperature becomes too low and drops out of the operation range. Refer to
"Checking the water volume and expansion vessel pre-pressure" on page
minimize the backup heater operation.
■
Malfunction of the heat pump unit.
If during backup heater operation the heating load is higher than the heater capacity, the water temperature can not increase. In this case refer to
"Re-start at low outdoor ambient temperatures" on page 15
Domestic hot water tank (option)
An optional EKHW* domestic hot water tank with integrated 3 kW electrical booster heater can be connected to the indoor unit. The domestic hot water tank is available in three sizes: 150, 200 and
300 litre. Refer to the domestic hot water tank installation manual for further details.
Simultaneous operation of compressor, backup heater and booster heater is
NOT possible
. Read attentively following warnings to understand the unit operation.
Balance between space heating/cooling demand and domestic hot water demand
■
Only if the unit is correctly sized then at some point during space cooling/heating operation the unit will reach the requested setpoint. When this occurs, domestic water heating by compressor becomes possible.
■
To ensure domestic hot water production, the schedule timers must be used to disable space heating/cooling. Refer to the operation manual on how to program the schedule timers.
Booster heater operation is only possible when the compressor of the heatpump is not operating. The compressor operates because of space cooling/heating demand or because of domestic water heating.
■
To ensure domestic hot water production, the schedule timers must be used to disable space heating/cooling. Refer to the operation manual on how to program the schedule timers.
If using a room thermostat, domestic water heating by compressor or by booster heater is
NOT
possible as long as the room thermostat demands cooling or heating.
In this case de-activate the room thermostat demand by its schedule timer.
Refer to the manual of the room thermostat for a detailed explanation how to de-activate space cooling/heating by schedule timer, or refer to the separate addendum for an example of the Daikin room thermostat schedule timer programming.
Drain pan kit (option)
For heating/cooling versions (EKHBX), it is necessary to install the
EKHBDP drain pan kit.
For more information concerning the drain pan kit, refer to
"Installation of the EKHBDP drain pan kit (only for EKHBX models)" on page 9
.
Solar kit for domestic hot water tank (option)
For information concerning the EKSOLHW solar kit, refer to the installation manual of that kit.
Remote alarm kit (option)
For information concerning the EKRP1HB remote alarm, refer to the installation manual of that kit.
Installation manual
2
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system
4PW48441-1B
Scope of this manual
This installation manual describes the procedures for unpacking, installing and connecting all EKHBH/X indoor unit models.
NOTE
Installation of the ERHQ heat pump outdoor is described in the outdoor unit installation manual.
Operation of the indoor unit is described in the indoor unit operation manual.
Model identification
Indoor unit
EK HB XE 008 AA 3 V3
Backup heater nominal voltage:
V3 = 1P, 230 V
Backup heater capacity (kW)
Series
Indication of heating/cooling capacity (kW)
(a)
XE = heating and cooling,
HE = heating only
Hydro box
European kit
(a) For exact values, refer to
"Technical specifications" on page 26
.
Drain pan kit (optional)
EK HB DP 150
Drain pan
Hydro box
European kit
A
CCESSORIES
Accessories supplied with the indoor unit
See
figure 1
7
8
5
6
3
4
1
2
Installation manual
Operation manual
Unpacking instruction sheet
Shut-off valve
Wall mounting bracket
Wiring diagram sticker (inside indoor unit cover)
Indoor unit cover fixing screw
Nylon washer
T
YPICAL APPLICATION EXAMPLES
When the
AD
system is used in series with another heat source (e.g. gas boiler), it shall be made sure that the return water temperature to the heat exchanger does not exceed 55°C. Daikin shall not be held liable for any damage resulting from not observing this rule.
The application examples given below are for illustration purposes only.
Application 1
Space heating only application with a room thermostat connected to the indoor unit.
1 2 3
T
4 5 6
7
FHL1
FHL2
FHL3
3
4
1
2
5
Outdoor unit
Indoor unit
Heat exchanger
Pump
Shut-off valve
6
7
FHL1..3
T
Collector (field supply)
Shut-off valve
Floor heating loop
(field supply)
Room thermostat
(field supply)
Pump operation and space heating
When a room thermostat (T) is connected to the indoor unit, the pump (4) will operate when there is a heating request from the room thermostat, and the outdoor unit will start operating to achieve the target leaving water temperature as set on the user interface.
When the room temperature is above the thermostat set point, the outdoor unit and pump will stop operating.
Make sure to connect the thermostat wires to the correct terminals (see
"Connection of the thermostat cable" on page 13
) and to configure the DIP switch toggle switches
"Room thermostat installation configuration" on page 14
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system
4PW48441-1B
Installation manual
3
Application 2
Space heating only application without room thermostat connected to the indoor unit. The temperature in each room is controlled by a valve on each water circuit. Domestic hot water is provided through the domestic hot water tank which is connected to the indoor unit.
Application 3
Space cooling and heating application with a
room thermostat suitable for cooling/heating changeover
connected to the indoor unit. Heating is provided through floor heating loops and fan coil units. Cooling is provided through the fan coil units only.
Domestic hot water is provided through the domestic hot water tank which is connected to the indoor unit.
6
1 2 3 4 5
M
8
T1 T2
6
T3
9
M1 M2 M3
7
10 11
FHL1
FHL2
FHL3
12
1
T
2 3 4 5
M
8
M
13
FCU1
FCU2
FCU3
7
8
5
6
3
4
1
2
9
Outdoor unit
Indoor unit
Heat exchanger
Pump
Shut-off valve
Collector (field supply)
Shut-off valve
Motorised 3-way valve
(field supply)
By-pass valve
(field supply)
10
11
12
FHL1..3
T1..3
M1..3
Booster heater
Heat exchanger coil
Domestic hot water tank
Floor heating loop
(field supply)
Individual room thermostat (field supply)
Individual motorised valve to control loop
FHL1 (field supply)
Pump operation
With no thermostat connected to the indoor unit (2), the pump (4) can be configured to operate either as long as the indoor unit is on, or until the required water temperature is reached.
NOTE
Details on pump configuration can be found under
"Pump operation configuration" on page 15
.
Space heating
The outdoor unit (1) will operate to achieve the target leaving water temperature as set on the user interface.
When circulation in each space heating loop (FHL1..3) is controlled by remotely controlled valves (M1..3), it is important to provide a by-pass valve (9) to avoid the flow switch safety device from being activated.
The by-pass valve should be selected as such that at all time the minimum water flow as mentioned under
"Water pipework" on page 9
is guaranteed.
Domestic water heating
When domestic water heating mode is enabled (either manually by the user, or automatically through a schedule timer) the target domestic hot water temperature will be achieved by the heat exchanger coil or the electrical booster heater.
When the domestic hot water temperature is below the user configured set point, the 3-way valve will be activated to heat the domestic water by means of the heat pump. In case of a high domestic hot water temperature setting, the booster heater (10) provides heating.
It is possible to connect either a 2-wire or a 3-wire 3-way valve (8). Make sure to fit the 3-way valve correctly. For more details, refer to
"Wiring the 3-way valve" on page 14
Installation manual
4
7
10 11
FHL1
FHL2
FHL3
7
8
5
6
3
4
1
2
Outdoor unit
Indoor unit
Heat exchanger
Pump
Shut-off valve
Collector (field supply)
Shut-off valve
Motorised 3-way valve
(field supply)
10
11
12
13
FCU1..3
FHL1..3
T
Booster heater
Heat exchanger coil
Domestic hot water tank
Motorised 2-way valve
(field supply)
Fan coil unit (field supply)
Floor heating loop
(field supply)
Room thermostat with cooling/heating switch
(field supply)
Pump operation and space heating and cooling
According to the season, the customer will select cooling or heating on the room thermostat (T). This selection is not possible by operating the user interface.
When space cooling/heating is requested by the room thermostat
(T), the pump will start operating and the indoor unit (2) will switch to
"cooling mode"/"heating mode". The outdoor unit (1) will start operating to achieve the target leaving cold/hot water temperature.
In case of cooling mode, the motorised 2-way valve (13) will close as to prevent cold water running through the floor heating loops (FHL).
Make sure to connect the thermostat wires to the correct terminals (see
"Connection of the thermostat cable" on page 13
) and to configure the DIP switch toggle switches
correctly (see
"Room thermostat installation configuration" on page 14
).
Wiring of the 2-way valve (13) is different for a NC (normal closed) valve and a NO (normal open) valve! Make sure to connect to the correct terminal numbers as detailed on the wiring diagram.
The ON/OFF setting of the heating/cooling operation is done by the room thermostat and cannot be done by the user interface on the indoor unit.
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system
4PW48441-1B
Domestic water heating
Domestic water heating is as described under
"Application 2" on page 4
Application 4
Space cooling and heating application without a room thermostat
connected to the indoor unit, but with a heating only room thermostat controlling the floor heating and a cooling/heating thermostat controlling the fan coil units. Heating is provided through floor heating loops and fan coil units. Cooling is provided through the fan coil units only.
6 9
When closing several loops in the system by remotely controlled valves, it might be required to install a by-pass valve (9) to avoid the flow switch safety device from being
"Application 2" on page 4
Wiring of the 2-way valve (13) is different for a NC (normal closed) valve and a NO (normal open) valve! Make sure to connect to the correct terminal numbers as detailed on the wiring diagram.
The ON/OFF setting of the heating/cooling operation is done by the user interface on the indoor unit.
1 2 3 4 5 13
T
14
T4
T5
T6
FCU1
FCU2
FCU3
6
M M
O
VERVIEW OF THE INDOOR UNIT
Opening the indoor unit
■
The front flap on the indoor unit cover gives access to the manometer and user interface.
■
The indoor unit cover can be removed by removing the 2 side screws and unhitching the cover.
7
FHL1
FHL2
FHL3
1
2
3
4
5
6
7
9
13
Outdoor unit
Indoor unit
Heat exchanger
Pump
Shut-off valve
Collector (field supply)
Shut-off valve
By-pass valve (field supply)
Motorised 2-way valve to shut off the floor heating loops during cooling operation (field supply)
14
FCU1..3
FHL1..3
T
T4..6
Motorised 2-way valve for activation of the room thermostat (field supply)
Fan coil unit with thermostat (field supply)
Floor heating loop (field supply)
Heating only room thermostat (field supply)
Individual room thermostat for fan coil heated/cooled room (field supply)
Pump operation
With no thermostat connected to the indoor unit (2), the pump (4) can be configured to operate either as long as the indoor unit is on, or until the required water temperature is reached.
NOTE
Details on pump configuration can be found under
"Pump operation configuration" on page 15
Space heating and cooling
According to the season, the customer will select cooling or heating through the user interface on the indoor unit.
The outdoor unit (1) will operate in cooling mode or heating mode to achieve the target leaving water temperature.
With the unit in heating mode, the 2-way valve (13) is open. Hot water is provided to both the fan coil units and the floor heating loops.
With the unit in cooling mode, the motorised 2-way valve (13) is closed to prevent cold water running through the floor heating loops
(FHL).
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system
4PW48441-1B
Make sure to fix the cover with the screws and nylon washers when installing the cover (screws and nylon washers are delivered as accessory).
Parts inside the unit can be hot.
■
To gain access to the switch box components – e.g. to connect the field wiring – the switch box service panel can be removed.
Thereto, loosen the front screws and unhitch the switch box service panel.
Switch off all power supply — i.e. outdoor unit power supply and backup heater and domestic hot water tank power supply (if applicable) — before removing the switch box service panel.
Installation manual
5
13
10
12
3
17
16
15
14
Main components
22
21
20
19
18
Installation manual
6
2
3
4
5
6
3
7
1
3
8
9
10
11
1.
Air purge valve
Remaining air in the water circuit will be automatically removed via the air purge valve.
2.
Emergency backup heater
Emergency backup heater operation always has priority over compressor or booster heater operation.
Emergency backup heater operation occurs because of:
User request to heat up water to the space heating loops. The temperature of this water is too low and is out of the operation range (during initial start-up for example).
During heating operation the water temperature becomes too low and drops out of the operation range.
Malfunction of the heat pump unit.
If during backup heater operation the heating load is higher than the heater capacity, the water temperature can not increase.
3.
Temperature sensors
Four temperature sensors determine the water and refrigerant temperature at various points in the water circuit.
4.
Switch box
The switch box contains the main electronic and electrical parts of the indoor unit.
5.
Heat exchanger
6.
Expansion vessel (10 l)
7.
User interface
The user interface allows the installer and user to set up, use and maintain the unit.
8.
Refrigerant liquid connection
9.
Refrigerant gas connection
10. Shut-off valves (accessory)
The shut-off valves on the water inlet connection and water outlet connection allow isolation of the indoor unit water circuit side from the residential water circuit side. This facilitates draining and filter replacement of the indoor unit.
11. Water inlet connection
12. Water outlet connection
13. Drain and fill valves
14. Water filter
The water filter removes dirt from the water to prevent damage to the pump or blockage of the evaporator. The water filter must be cleaned on a regular base. See
"Maintenance" on page 23
15. Expansion vessel drain valve
The drain valve of the expansion vessel allows draining the remaining water in the expansion vessel after draining with the drain and fill valves.
16. Manometer
The manometer allows readout of the water pressure in the water circuit.
17. Flow switch
The flow switch checks the flow in the water circuit and protects the heat exchanger against freezing and the pump against damage.
18. Pump
The pump circulates the water in the water circuit.
19. Backup heater vessel
The backup heater heats the water in the backup heater vessel.
20. Backup heater thermal protector
The backup heater is equipped with a thermal protector. The thermal protector is activated when the temperature becomes too high.
21. Backup heater thermal fuse
The backup heater is equipped with a thermal fuse. The thermal fuse is blown when the temperature becomes too high (higher than the backup heater thermal protector temperature).
22. Pressure relief valve
The pressure relief valve prevents excessive water pressure in the water circuit by opening at 3 bar and discharging some water.
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system
4PW48441-1B
Switch box main components
14
12
X9A
11
X13A
SS2
10
9
FU1
15
8
1
TR1
TR1
on
SS1 on off
SS2
A1P
K1M
K1M
K5M
K5M
OPTION EKHW
K3M
K7M
K3M
OPTION EKHW
F2B
F1B
K4M
F2B F1B
A1P
A4P
K6M
OPTION EKHW
X4M
1
X4M
2
A4P
OPTION EKHW
X3M
L1
L
X3M (230V)
L2
N
X2M
1 2 3 thermostat
4 5 6
2-way valve
7 8 9
3-way valve
10
X2M
11 12 13 14
Q2L
15 16 17 18
OPTIONAL
X1M
FU2
13
6
6
16
4
5
2
3
12. X9A socket
The X9A socket receives the thermistor connector (only for installations with domestic hot water tank).
13. In line fuse FU2
14. Transformer TR1
15. A4P
Solar/remote alarm address card (only for installations with solar kit or remote alarm kit)
16. K7M relay for solar pump (optional)
This relay and its output on X2M can be activated when the solar input on A4P becomes active.
NOTE
The electrical wiring diagram can be found on the inside of the switch box cover.
Functional diagram
2 3 4 5 6 7 8 9
R1T t >
H
2
O
R2T t >
R4T t >
10
11
7
1.
Backup heater contactors K1M and K5M
2.
Main PCB
The main PCB (Printed Circuit Board) controls the functioning of the unit.
3.
Booster heater contactor K3M (only for installations with domestic hot water tank)
4.
Booster heater circuit breaker F2B (only for installations with domestic hot water tank)
The circuit breaker protects the booster heater in the domestic hot water tank against overload or short circuit.
5.
Backup heater circuit breaker F1B
The circuit breaker protects the backup heater electrical circuit against overload or short circuit.
6.
Terminal blocks
The terminal blocks allow easy connection of field wiring.
7.
Cable tie mountings
The cable tie mountings allow to fix the field wiring with cable ties to the switch box to ensure strain relief.
8.
Terminal blocks X3M, X4M (only for installations with domestic hot water tank)
9.
PCB fuse FU1
10. DIP switch SS2
The DIP switch SS2 provides 4 toggle switches to configure certain installation parameters. See
"DIP switch settings overview" on page 14
11. X13A socket
The X13A socket receives the K3M connector (only for installations with domestic hot water tank).
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system
4PW48441-1B
R3T t >
12
6
7
8
4
5
9
1
1
2
3
14
Outdoor unit
Indoor unit
Expansion vessel drain valve
Expansion vessel
Manometer
Air purge valve
Pressure relief valve
Backup heater vessel with backup heater
Pump
10
11
12
13
14
R1T
R2T
R3T
R4T
13
Flow switch
Shut-off valve water outlet with drain valve (field installation)
Shut-off valve water inlet with drain valve (field installation)
Filter
Heat exchanger
Temperature sensors
Installation manual
7
I
NSTALLATION OF THE INDOOR UNIT
Selecting an installation location
The unit is to be wall mounted in an indoor location that meets the following requirements:
■
The installation location is frost-free.
■
The space around the unit is adequate for servicing.
(See figure 2)
■
The space around the unit allows for sufficient air circulation.
■
There is a provision for condensate drain (only for EKHBX models with drain pan kit EKHBDP) and pressure relief valve blow-off.
■
The installation surface is a flat and vertical non-combustible wall, capable of supporting the operation weight of the unit (see
"Technical specifications" on page 26
■
There is no danger of fire due to leakage of inflammable gas.
■
All piping lengths and distances have been taken into consideration.
Requirement
Maximum allowable refrigerant piping length between outdoor unit and indoor unit
Minimum required refrigerant piping length between outdoor unit and indoor unit
Maximum allowable height difference between outdoor unit and indoor unit
Maximum allowable distance between the 3-way valve and the indoor unit (only for installations with domestic hot water tank).
Maximum allowable distance between the domestic hot water tank and the indoor unit (only for installations with domestic hot water tank). The thermistor cable supplied with the domestic hot water tank is 12 m in length.
Value
30 m
3 m
20 m
3 m
10 m
■
The equipment is not intended for use in a potentially explosive atmosphere.
NOTE
If the installation is equipped with a domestic hot water tank (optional), please refer to the domestic hot water tank installation manual.
Dimensions and service space
Unit of measurement: mm
Dimensions of the wall bracket
10
163
10
163
10
Inspecting, handling and unpacking the unit
■
The indoor unit is packed in a cardboard box, fixed by straps on a wooden pallet.
■
At delivery, the unit must be checked and any damage must be reported immediately to the carrier claims agent.
■
Check if all indoor unit accessories (see
"Accessories" on page 3
■
Bring the unit as close as possible to its final installation position in its original package in order to prevent damage during transport.
■
The indoor unit weighs approximately 50 kg and should be lifted by two persons using the two lifting bars provided.
Do not grasp the switch box or piping to lift the unit! Two lifting bars are provided to lift the unit.
figure 3
3
4
5
1
2
Flexible drain hose
Water outlet connection
Water inlet connection
Refrigerant liquid connection
Refrigerant gas connection
Required service space, see
figure 2
Installation manual
8
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system
4PW48441-1B
Mounting the indoor unit
The weight of the indoor unit is approximately 50 kg. Two persons are required to mount the unit.
1
Fix the wall mounting bracket to the wall using appropriate plugs and screws.
Make sure the wall mounting bracket is completely level. When the unit is not installed level, air might get trapped in the water circuit resulting in malfunctioning of the unit.
Pay special attention to this when installing an EKHBX model to prevent overflow of the drain pan.
2
Hang the indoor unit on the wall mounting bracket.
3
Fix the indoor unit at the bottom side using appropriate plugs and screws. To do so, the unit is equipped with 2 holes at the bottom outer edges of the frame.
1
2
3
Installation of the EKHBDP drain pan kit (only for
EKHBX models)
For heating/cooling models, it is necessary to install the drain pan kit
(see
"Accessories" on page 3
During cooling operation, water vapour (humidity) in the air might condense to liquid and collect on the cold refrigerant and water pipes.
This water is collected in the drain pan, which must be connected to a drain.
For installation instructions, refer to the instruction sheet delivered with the drain pan kit.
Make sure to position the pressure relief valve hose end in the drain pan. Failure to do so might lead to water coming into contact with electrical parts, resulting in electrical shocks or short-circuit of the electrical system.
Refrigerant pipework
For all guidelines, instructions and specifications regarding refrigerant pipework between the indoor unit and the outdoor unit, please refer to the outdoor unit installation manual.
The location of the gas pipe and liquid pipe on the indoor unit is shown under
"Main components" on page 6
Refrigerant piping specifications
Gas pipe connection
Liquid pipe connection
Indoor unit
15.9 mm (5/8 inch)
6.4 mm (1/4 inch)
Outdoor unit
15.9 mm (5/8 inch)
6.4 mm (1/4 inch)
When connecting the refrigerant pipes, always use two wrenches/spanners for tightening or loosening nuts!
Failure to do so can result in damaged piping connections and leaks.
Water pipework
Checking the water circuit
The units are equipped with a water inlet and water outlet for connection to a water circuit. This circuit must be provided by a licensed technician and must comply with all relevant European and national regulations.
The unit is only to be used in a closed water system.
Application in an open water circuit can lead to excessive corrosion of the water piping.
Before continuing the installation of the unit, check the following points:
■
The maximum water pressure is 3 bar.
■
Two shut-off valves are delivered with the unit. To facilitate service and maintenance, install one at the water inlet and one at the water outlet of the indoor unit. Mind position of the shut-off valves. Orientation of the integrated drain and fill valves is important for servicing. See
figure 3
■
Drain taps must be provided at all low points of the system to permit complete drainage of the circuit during maintenance.
Two drain valves integrated in the shut-off valves, and a drain valve on the expansion vessel are provided to drain the water from the indoor unit water system.
■
Make sure to provide a proper drain for the pressure relief valve to avoid any water coming into contact with electrical parts.
■
Air vents must be provided at all high points of the system. The vents should be located at points which are easily accessible for servicing. An automatic air purge is provided inside the indoor unit. Check that this air purge valve is not tightened too much so that automatic release of air in the water circuit remains possible.
■
Take care that the components installed in the field piping can withstand the water pressure.
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system
4PW48441-1B
Installation manual
9
Checking the water volume and expansion vessel prepressure
The unit is equipped with an expansion vessel of 10 litre which has a default pre-pressure of 1 bar.
To assure proper operation of the unit, the pre-pressure of the expansion vessel might need to be adjusted and the minimum and maximum water volume must be checked.
1
A minimum water volume is required to prevent that the water temperature drops too much during defrost (low ambient temperature).
If the water volume is too low, two problems can occur:
1 The water temperature drops too much during defrost and defrost stops to protect the plate heat exchanger against freezing.
2 The compressor does not start up after the defrost cycle because the water temperature is too low.
In both cases the backup heater will operate instead of the compressor to increase the water temperature.
When the water temperature is high enough, the backup heater stops and the compressor restarts.
If the heating load is higher than the backup heater capacity, the water temperature can not increase. In this case refer to
"Re-start at low outdoor ambient temperatures" on page 15
Repeated forced defrost stops can in some cases cause severe ice build-up on the outdoor unit. This will lead to reduced unit performance.
The minimum required water volume in the system is 20 l.
However, to minimize emergency backup heater operation it is highly recommended to have a water volume of 40 l.
When circulation in each space heating loop is controlled by remotely controlled valves, it is important that this minimum water volume is kept even if all the valves are closed.
Example
1 2 3 4 5
T1 T2
6
T3
M1 M2 M3
8
7
8
FHL1
FHL2
By-pass valve
(field supply)
FHL3
1
Outdoor unit
2
Indoor unit
3
Heat exchanger
4
Pump
5
Shut-off valve
6
Collector (field supply)
7
Shut-off valve
FHL1..3 Floor heating loop
(field supply)
T1..3
Individual room thermostat (field supply)
M1..3
Individual motorised valve to control loop
FHL1 (field supply)
2
Using the table below, determine if the expansion vessel prepressure requires adjustment.
3
Using the table and instructions below, determine if the total water volume in the installation is below the maximum allowed water volume.
Installation height difference
(a)
≤
7 m
Water volume
≤
280 l
No pre-pressure adjustment required.
>280 l
Actions required:
• pre-pressure must be decreased, calculate according to
"Calculating the pre-pressure of the expansion vessel"
• check if the water volume is lower than maximum allowed water volume
(use graph below)
>7 m
Actions required:
• pre-pressure must be increased,
calculate according to "Calculating the pre-pressure of the expansion vessel"
• check if the water volume is lower than maximum allowed water volume
(use graph below)
Expansion vessel of the unit too small for the installation.
(a) Installation height difference: height difference (m) between the highest point of the water circuit and the indoor unit. If the indoor unit is located at the highest point of the installation, the installation height is considered 0 m.
Calculating the pre-pressure of the expansion vessel
The pre-pressure (Pg) to be set depends on the maximum installation height difference (H) and is calculated as below:
Pg=(H/10+0.3) bar
Checking the maximum allowed water volume
To determine the maximum allowed water volume in the entire circuit, proceed as follows:
1
Determine for the calculated pre-pressure (Pg) the corresponding maximum water volume using the graph below.
2
Check that the total water volume in the entire water circuit is lower than this value.
If this is not the case, the expansion vessel inside the indoor unit is too small for the installation.
2.5
2
1.5
1
0.5
0.3
0 20 50 100 150 200 250 300 350 400 450 maximum water volume [l]
= pre-pressure
= maximum water volume
Installation manual
10
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system
4PW48441-1B
Example 1
The indoor unit is installed 5 m below the highest point in the water circuit. The total water volume in the water circuit is 100 l.
In this example, no action or adjustment is required.
Example 2
The indoor unit is installed at the highest point in the water circuit.
The total water volume in the water circuit is 350 l.
Result:
■
Since 350 l is higher than 280 l, the pre-pressure must be decreased (see table above).
■
The required pre-pressure is:
Pg = (H/10 + 0.3) bar = (0/10 + 0.3) bar = 0.3 bar
■
The corresponding maximum water volume can be read from the graph: approximately 410 l.
■
Since the total water volume (350 l) is below the maximum water volume (410 l), the expansion vessel suffices for the installation.
Setting the pre-pressure of the expansion vessel
When it is required to change the default pre-pressure of the expansion vessel (1 bar), keep in mind the following guidelines:
■
Use only dry nitrogen to set the expansion vessel pre-pressure.
■
Inappropriate setting of the expansion vessel pre-pressure will lead to malfunction of the system. Therefore, the pre-pressure should only be adjusted by a licensed installer.
Connecting the water circuit
Water connections must be made in accordance with the outlook diagram delivered with the unit, respecting the water in- and outlet.
Be careful not to deform the unit piping by using excessive force when connecting the piping. Deformation of the piping can cause the unit to malfunction.
If air, moisture or dust gets in the water circuit, problems may occur.
Therefore, always take into account the following when connecting the water circuit:
■
Use clean pipes only.
■
Hold the pipe end downwards when removing burrs.
■
Cover the pipe end when inserting it through a wall so that no dust and dirt enter.
■
Use a good thread sealant for the sealing of the connections.
The sealing must be able to withstand the pressures and temperatures of the system.
■
When using non-brass metallic piping, make sure to insulate both materials from each other to prevent galvanic corrosion.
■
Because brass is a soft material, use appropriate tooling for connecting the water circuit. Inappropriate tooling will cause damage to the pipes.
■
The unit is only to be used in a closed water system.
Application in an open water circuit can lead to excessive corrosion of the water piping.
■
Never use Zn-coated parts in the water circuit.
Excessive corrosion of these parts may occur as copper piping is used in the internal water circuit of the unit.
NOTE
■
When using a 3-way valve in the water circuit.
Preferably choose a ball type 3-way valve to guarantee full separation between domestic hot water and floor heating water circuit.
■
When using a 3-way valve or a 2-way valve in the water circuit.
The recommended maximum changeover time of the valve should be less than 60 seconds.
Charging water
1
Connect the water supply to a drain and fill valve (see
"Main components" on page 6
).
2
Make sure the automatic air purge valve is open (at least 2 turns).
3
Fill with water until the manometer indicates a pressure of approximately 2.0 bar. Remove air in the circuit as much as possible using the air purge valves. Air present in the water circuit might cause malfunctioning of the backup heater.
4
Check that the backup heater vessel is filled with water by opening the pressure relief valve. Water must flow out of the valve.
NOTE
■
During filling, it might not be possible to remove all air in the system. Remaining air will be removed through the automatic air purge valves during first operating hours of the system. Additional filling with water afterwards might be required.
■
The water pressure indicated on the manometer will vary depending on the water temperature
(higher pressure at higher water temperature).
However, at all times water pressure should remain above 0.3 bar to avoid air entering the circuit.
■
The unit might dispose some excessive water through the pressure relief valve.
■
Water quality must be according to EN directive
98/83 EC.
Piping insulation
The complete water circuit, inclusive all piping, must be insulated to prevent condensation during cooling operation and reduction of the cooling and heating capacity.
If the temperature is higher than 30°C and the humidity is higher than
RH 80%, then the thickness of the sealing materials should be at least 20 mm in order to avoid condensation on the surface of the sealing.
Field wiring
WARNING
■
A main switch or other means for disconnection, having a contact separation in all poles, must be incorporated in the fixed wiring in accordance with relevant local and national legislation.
■
Switch off the power supply before making any connections.
■
All field wiring and components must be installed by a licensed electrician and must comply with relevant
European and national regulations.
■
The field wiring must be carried out in accordance with the wiring diagram supplied with the unit and the instructions given below.
■
Be sure to use a dedicated power supply. Never use a power supply shared by another appliance.
■
Be sure to establish an earth. Do not earth the unit to a utility pipe, surge absorber, or telephone earth.
Incomplete earth may cause electrical shock.
■
Be sure to install an earth leakage protector (30 mA).
Failure to do so may cause electrical shock.
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system
4PW48441-1B
Installation manual
11
Overview
The illustration below gives an overview of the required field wiring between several parts of the installation. Refer also to
"Typical application examples" on page 3
4
T
E
B
C
D
2
5
6
M
F
M
G
7
H
I
1 3
8
A
B
C
D
E
Single power supply for outdoor unit, backup heater and booster heater (optional)
Outdoor unit
Backup heater
Indoor unit
Room thermostat (field supply, optional)
A 9
F
G
H
I
3-way valve for domestic hot water tank (field supply, optional)
2-way valve for cooling mode (field supply, optional)
Domestic hot water tank
(optional)
Booster heater
(optional)
Item
1
Description
Power supply cable for outdoor unit
Required number of conductors
2+GND
Maximum running current
(a)
2
Indoor unit power supply and communication cable
3+GND
(b)
3
4
5
6
7
8
9
Power supply cable for backup heater
Room thermostat cable
3-way valve control cable
2-way valve control cable
2+GND or
3+GND
3 or 4
2+GND
2+GND
(c)
100 mA
(d)
Booster heater power supply and thermal protection cable
Thermistor cable
4+GND
Booster heater power supply cable
2
2+GND
(e)
13 A
(a) Refer to nameplate on outdoor unit
(b) Cable section 2.5 mm
2
(c) See table under
"Connection of the backup heater power supply" on page 13 .
(d) Minimum cable section 0.75 mm
(e) The thermistor and connection wire (12 m) are delivered with the domestic hot water tank.
Internal wiring - Parts table
Refer to the internal wiring diagram supplied with the unit (on the inside of the indoor unit switch box cover). The abbreviations used are listed below.
A1P.................. Main PCB
A2P.................. Remote controller PCB (user interface)
A3P.................. Thermostat (field supply, PC= internal Power Circuit)
A4P.......... * ..... Solar/remote alarm address card
E1H.................. Backup heater element 1
E4H..........# ..... Booster heater
F1B .................. Fuse backup heater
F2B ..........# ..... Fuse booster heater
F1T .................. Thermal fuse backup heater (250 V, 94°C)
FU1.................. Fuse 3.15 A T 250 V
FU2.................. Fuse 5 A T 250 V
FuR,FuS .......... Fuse 5 A 250 V for solar/remote alarm PCB
K1M ................. Contactor backup heater step 1
K3M .........# ..... Contactor booster heater
K5M ................. Contactor for backup heater all pole disconnection
K7M ......... * ..... Relay for solar pump
M1P ................. Pump
M2S .......## ..... 2-way valve for cooling mode
M3S .........# ..... 3-way valve: floor heating/domestic hot water
PHC1 ............... Optocoupler input circuit
Q1DI ................ Earth leakage protector
Q1L.................. Thermal protector backup heater
Q2L,Q3L ..# ..... Thermal protector booster heater
R1T.................. Outlet water heat exchanger thermistor
R2T.................. Outlet water backup heater thermistor
R3T.................. Refrigerant liquid side thermistor
R4T.................. Inlet water thermistor
R5T..........# ..... Domestic hot water thermistor
S1L .................. Flow switch
S1S.......... * ..... Solar pumpstation relay
SS1.................. DIP switch
TR1.................. Transformer 24 V for PCB
V1S.................. Spark suppression 1
V2S.................. Spark suppression 2
X1M-X4M......... Terminal blocks
*
#
##
Optional
Applications with domestic hot water tank only
Heating/cooling applications only
Field wiring guidelines
■
Most field wiring on the indoor unit side is to be made on the terminal block inside the switch box. To gain access to the terminal block, remove the indoor unit cover and switch box service panel, see
"Opening the indoor unit" on page 5
■
Cable tie mountings are provided at the bottom of the switch box. Fix all cables using cable ties (field supply).
■
A dedicated power circuit is required for the backup heater.
■
Installations equipped with a domestic hot water tank (optional), require a dedicated power circuit for the booster heater.
Please refer to the domestic hot water tank installation manual.
Installation manual
12
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system
4PW48441-1B
Connection of the indoor unit power supply and communication cable
Power circuit and cable requirements
Power supply for the indoor unit is to be provided through the outdoor unit. Data communication with the outdoor unit is provided through the same cable.
For all guidelines and specifications regarding field wiring between the indoor unit and the outdoor unit, please refer to the outdoor unit installation manual.
Procedure
1
Using the appropriate cable, connect the power circuit to the appropriate terminals as shown on the wiring diagram and the illustration below.
2
Connect the earth conductor (yellow/green) to the earthing screw on the switch box mounting plate.
3
Fix the cable with cable ties to the cable tie mountings to ensure strain relief.
4
When routing out cables, make sure that these do not obstruct mounting of the indoor unit cover, see
figure 3
Note: only relevant field wiring is shown.
Procedure
1
Using the appropriate cable, connect the power circuit to the main circuit breaker as shown on the wiring diagram and the illustration below.
2
Connect the earth conductor (yellow/green) to the earthing screw on the X1M terminal.
3
Fix the cable with cable ties to the cable tie mountings to ensure strain relief.
Note: only relevant field wiring is shown.
1x 230 V
N
1 2 3
1 2 3
Connection of the backup heater power supply
Power circuit and cable requirements
■
Be sure to use a dedicated power circuit for the backup heater. Never use a power circuit shared by another appliance.
■
Use one and same dedicated power supply for the outdoor unit, indoor unit, backup heater and booster heater (domestic hot water tank).
This power circuit must be protected with the required safety devices according to local and national regulations.
Select the power cable in accordance with relevant local and national regulations. For the maximum running current of the backup heater, refer to the table below.
Indoor unit model
EKHB*E008AA3V3
Backup heater capacity
3 kW
Backup heater nominal voltage
1x 230 V
Maximum running current
13 A
Z max
(
Ω
)
—
L1 N
Connection of the thermostat cable
Connection of the thermostat cable depends on the application.
"Typical application examples" on page 3
"Room thermostat installation configuration" on page 14
and configuration options on pump operation in combination with a room thermostat.
Thermostat requirements
■
Power supply: 230 V AC or battery operated
■
Contact voltage: 230 V.
Procedure
1
Connect the thermostat cable to the appropriate terminals as shown on the wiring diagram.
Heating only thermostat
X2M
H C L N
1 2 3 4
Heating/cooling thermostat
X2M
H C L N
1 2 3 4 th
H C th
2
Fix the cable with cable ties to the cable tie mountings to ensure strain relief.
3
Set DIP switch SS2-3 on the PCB to ON. See
"Room thermostat installation configuration" on page 14
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system
4PW48441-1B
Installation manual
13
Connection of the valve control cables
Valve requirements
■
Power supply: 230 V AC
■
Maximum running current: 100 mA
Wiring the 2-way valve
1
Using the appropriate cable, connect the valve control cable to the X2M terminal as shown on the wiring diagram.
NOTE
Wiring is different for a NC (normal closed) valve and a NO (normal open) valve. Make sure to connect to the correct terminal numbers as detailed on the wiring diagram and illustrations below.
Normal closed (NC) 2-way valve Normal open (NO) 2-way valve
X2M 5 6 7 X2M 5 6 7
M
NC
M
NO
2
Fix the cable(s) with cable ties to the cable tie mountings to ensure strain relief.
Wiring the 3-way valve
1
Using the appropriate cable, connect the valve control cable to the appropriate terminals as shown on the wiring diagram.
Two types of 3-way valves can be connected. Wiring is different for each type:
■
"Spring return 2-wire" type 3-way valve
The 3-way valve should be fitted as such that when the 3-way valve is idle (not activated), the space heating circuit is selected.
■
"SPST 3-wire" type 3-way valve
The 3-way valve should be fitted as such that when terminal ports 9 and 10 are electrified, the domestic hot water circuit is selected.
"Spring return 2-wire" valve
X2M 8 9 10
"SPST 3-wire" valve
X2M 8 9 10
M M
2
Fix the cable(s) with cable ties to the cable tie mountings to ensure strain relief.
S
TART
-
UP AND CONFIGURATION
The indoor unit should be configured by the installer to match the installation environment (outdoor climate, installed options, etc.) and user expertise.
It is important that all information in this chapter is read sequentially by the installer and that the system is configured as applicable.
DIP switch settings overview
DIP switch SS2 is located on the switch box PCB (see
"Switch box main components" on page 7
) and allows configuration of domestic
hot water tank installation, room thermostat connection and pump operation.
Switch off the power supply before opening the switch box service panel and making any changes to the DIP switch settings.
1 2 3 4
DIP switch
SS2 Description
1
ON
Not applicable for installer —
2
3
4
Domestic hot water tank installation
(see
"Domestic hot water tank installation configuration" on page 15 )
Room thermostat connection
(see
"Room thermostat installation configuration" on page 14 )
This setting
(a)
decides the operation mode when there is a simultaneous demand for more space heating/cooling and domestic water heating.
Installed
Room thermostat connected
Heating/cooling priority
(a) only applicable in case DIP switch 2 = ON
OFF
(Default)
Not installed
(Default)
No room thermostat connected
(Default)
No priority
(Default)
Room thermostat installation configuration
■
When no room thermostat is connected to the indoor unit, toggle switch SS2-3 should be set to OFF.
1 2 3 4
■
When a room thermostat is connected to the indoor unit, toggle switch SS2-3 should be set to ON.
1 2 3 4
■
On the room thermostat, set the hysteresis appropriately to prevent the pump from repeatedly turning on and off (i.e.
chattering), and thereby impacting the lifetime of the pump.
NOTE
■
When a room thermostat is connected to the indoor unit, the heating and cooling schedule timers are never available. Other schedule timers are not affected. For more information on the schedule timers, refer to the operation manual.
■
When a room thermostat is connected to the indoor unit, and the = button or y button is pressed, the centralised control indicator e will flash to indicate that the room thermostat has priority and controls on/off operation and change over operation.
Installation manual
14
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system
4PW48441-1B
The following table summarizes the required configuration and thermostat wiring at the terminal block in the switch box. Pump operation is listed in the third column. The three last columns indicate whether the following functionality is available on the user interface
(UI) or handled by the thermostat (T):
• space heating or cooling on/off ( y
)
• heating/cooling changeover (
=
)
• heating and cooling schedule timers ( pr
)
Thermostat
No thermostat
Configuration
• SS2-3 = OFF
• wiring: (non)
X2M
H C L N
1 2 3 4
• SS2-3 = ON
• wiring:
X2M
H C L N
1 2 3 4
Pump operation
determined by leaving water temperature
(a) on when space heating or cooling is on
( y
)
UI
UI
= p r
UI UI
UI UI
T — — Heating only thermostat
• SS2-3 = ON
• wiring:
X2M
H C L N
1 2 3 4 on when heating request by room thermostat th
Thermostat with heating/cooling switch
• SS2-3 = ON
• wiring:
X2M
H C L N
1 2 3 4 on when heating request or cooling request by room thermostat
T
H C th
T — th =
C =
H =
L, N =
Thermostat contact
Cooling contact
Heating contact
230 V AC
(a) The pump will stop when space heating/cooling is turned off or when the water reaches the desired water temperature as set on the user interface. With space heating/cooling turned on, the pump will then run every 5 minutes during 3 minutes to check the water temperature.
Pump operation configuration
NOTE
To set the pump speed, refer to
"Setting the pump speed" on page 16
Without room thermostat
When no thermostat is connected to the indoor unit, pump operation will be determined by the leaving water temperature.
To force continuous pump operation when no room thermostat is connected do the following:
set toggle switch SS2-3 to ON,
short-circuit the terminal numbers 1-2-4 on the terminal block in the switch box.
With room thermostat
When a thermostat is connected to the indoor unit, the pump will operate continuously whenever there is heating or cooling demand requested by the thermostat.
Domestic hot water tank installation configuration
■
When no domestic hot water tank is installed, toggle switch SS2-2 should be set to
OFF (default).
■
When a domestic hot water tank is installed, toggle switch SS2-2 should be set to ON.
1 2 3 4
1 2 3 4
Initial start-up at low outdoor ambient temperatures
During initial start-up and when water temperature is low, it is important that the water is heated gradually. Failure to do so may result in cracking of concrete floors due to rapid temperature change.
Please contact the responsible cast concrete building contractor for further details.
To do so, the lowest leaving water set temperature can be decreased to a value between 15°C and 25°C by adjusting the field setting
[9-01] (heating set point lower limit). Refer to
"Field settings" on page 16
NOTE
If leaving water temperature is set between 15°C and
25°C, heating is performed by the backup heater only.
Re-start at low outdoor ambient temperatures
When re-starting at low ambient temperature, it is important to ensure that the unit operates within its operation range as soon as possible (water temperature
≥
30°C) by reducing the load as much as possible during start-up. This procedure is applicable whenever the water temperature is out of the operation range (e.g. after long period of stand still, ...).
For example:
You can do this by switching off the fans of the fan coil units until the water temperature has increased to 30°C.
OR
For floor heating applications: start up circuit by circuit using a
(automatic) by-pass valve guaranteeing that water returning to the unit is more than 20°C.
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system
4PW48441-1B
Installation manual
15
Pre-operation checks
Checks before initial start-up
Switch off the power supply before making any connections.
After the installation of the unit, check the following before switching on the circuit breaker:
1
Field wiring
Make sure that the field wiring between local supply panel and indoor unit, outdoor unit and indoor unit, indoor unit and valves
(when applicable), indoor unit and room thermostat (when applicable), and indoor unit and domestic hot water tank has been carried out according to the instructions described in the chapter
"Field wiring" on page 11
, according to the wiring diagrams and according to European and national regulations.
2
Fuses or protection devices
Check that the fuses or the locally installed protection devices are of the size and type specified in the chapter
"Technical specifications" on page 26
. Make sure that neither a fuse nor a
protection device has been bypassed.
3
Booster heater circuit breaker F2B
Do not forget to turn on the booster heater circuit breaker F2B in the switch box (applies only to units with optional domestic hot water tank installed).
4
Earth wiring
Make sure that the earth wires have been connected properly and that the earth terminals are tightened.
5
Internal wiring
Visually check the switch box on loose connections or damaged electrical components.
6
Fixation
Check that the unit is properly fixed, to avoid abnormal noises and vibrations when starting up the unit.
7
Damaged equipment
Check the inside of the unit on damaged components or squeezed pipes.
8
Refrigerant leak
Check the inside of the unit on refrigerant leakage. If there is a refrigerant leak, call your local dealer.
9
Power supply voltage
Check the power supply voltage on the local supply panel. The voltage must correspond to the voltage on the identification label of the unit.
10
Air purge valve
Make sure the air purge valve is open (at least 2 turns).
11
Pressure relief valve
Check if the backup heater vessel is completely filled with water by operating the pressure relief valve. It should purge water instead of air.
Operating the system with the backup heater vessel not completely filled with water will damage the backup heater!
12
Shut-off valves
Make sure that the shut-off valves are correctly installed and fully open.
Operating the system with closed valves will damage the pump!
Powering up the indoor unit
When power supply to the indoor unit is turned on, "
88
" is displayed on the user interface during its initialisation, which might take up to
30 seconds. During this process the user interface cannot be operated.
Setting the pump speed
The pump speed can be selected on the pump (see
"Main components" on page 6
).
The default setting is high speed (III). If the water flow in the system is too high (e.g., noise of running water in the installation) the speed can be lowered (I or II).
The available external static pressure (ESP, expressed in mH
2
O) in function of the water flow (l/min) is shown in the graph below.
7
6
5
[mH
4
3
2
1
I
II
III
0
12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42
[l/min]
Field settings
The indoor unit should be configured by the installer to match the installation environment (outdoor climate, installed options, etc.) and user demand. Thereto, a number of so called field settings are available. These field settings are accessible and programmable through the user interface on the indoor unit.
Each field setting is assigned a 3-digit number or code, for example
[5-03], which is indicated on the user interface display. The first digit
[5] indicates the 'first code' or field setting group. The second and third digit [03] together indicate the 'second code'.
A list of all field settings and default values is given under
"Field settings table" on page 21
. In this same list, we provided for 2
columns to register the date and value of altered field settings at variance with the default value.
A detailed description of each field setting is given under
"Detailed description" on page 17
Installation manual
16
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system
4PW48441-1B
Procedure
To change one or more field settings, proceed as follows.
3
2
1
1
Press the z
button for a minimum of 5 seconds to enter FIELD
SET MODE.
The
$
icon (3) will be displayed. The current selected field setting code is indicated
;
(2), with the set value displayed to the right
-
(1).
2
Press the bgi
button to select the appropriate field setting first code.
3
Press the bgj
button to select the appropriate field setting second code.
4
Press the pfi
button and pfj
button to change the set value of the select field setting.
5
Save the new value by pressing the pr
button.
6
Repeat step 2 through 4 to change other field settings as required.
7
When finished, press the z
button to exit FIELD SET MODE.
NOTE
NOTE
Changes made to a specific field setting are only stored when the pr
button is pressed. Navigating to a new field setting code or pressing the z
button will discard the change made.
■
Before shipping, the set values have been set as shown under
"Field settings table" on page 21
■
When exiting FIELD SET MODE, "
88
" may be displayed on the user interface LCD while the unit initialises itself.
Detailed description
NOTE
Only field settings relevant for this model are explained.
[0] User permission level
If required, certain user interface buttons can be made unavailable for the user.
Three permission levels are defined (see the table below). Switching between level 1 and level 2/3 is done by simultaneously pressing buttons pfi and pfj immediately followed by simultaneously pressing buttons s and ba , and keeping all 4 buttons pressed for at least 5 seconds (in normal mode). Note that no indication on the user interface is given. When level 2/3 is selected, the actual permission level — either level 2 or level 3 — is determined by the field setting [0-00].
s
1
operable
Permission level
2
—
3
—
Button
Quiet mode button
Weather dependent set point button
Schedule timer enable/disable button
Programming button
Time adjust buttons ba pr
< pf i pf j operable operable operable operable
— operable
—
—
—
—
—
—
Inspection/test operation button z operable — —
[1] Weather dependent set point (heating operation only)
The weather dependent set point field settings define the parameters for the weather dependent operation of the unit. When weather dependent operation is active the water temperature is determined automatically depending on the outdoor temperature: colder outdoor temperatures will result in warmer water and vice versa. During weather dependent operation, the user has the possibility to shift up or down the target water temperature by a maximum of 5°C. See the operation manual for more details on weather dependent operation.
■
[1-00] Low ambient temperature (Lo_A): low outdoor temperature.
■
[1-01] High ambient temperature (Hi_A): high outdoor temperature.
■
[1-02] Set point at low ambient temperature (Lo_Ti): the target outgoing water temperature when the outdoor temperature equals or drops below the low ambient temperature (Lo_A).
Note that the Lo_Ti value should be higher than Hi_Ti, as for colder outdoor temperatures (i.e. Lo_A) warmer water is required.
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system
4PW48441-1B
Installation manual
17
Lo_Ti
Hi_Ti
T t
■
[1-03] Set point at high ambient temperature (Hi_Ti): the target outgoing water temperature when the outdoor temperature equals or rises above the high ambient temperature (Hi_A).
Note that the Hi_Ti value should be lower than Lo_Ti, as for warmer outdoor temperatures (i.e. Hi_A) less warm water suffices.
+ 05
00
– 05
Shift value
T t
T
A
Lo_A Hi_A
Target water temperature
Ambient (outdoor) temperature
= Shift value
T
A
[2] Disinfection function
Applies only to installations with a domestic hot water tank.
The disinfection function disinfects the domestic hot water tank by periodically heating the domestic water to a specific temperature.
The disinfection function field settings must be configured by the installer according to national and local regulations.
■
[2-00] Operation interval: day(s) of the week at which the domestic water should be heated.
■
[2-01] Status: defines whether the disinfection function is turned on (1) or off (0).
■
[2-02] Start time: time of the day at which the domestic water should be heated.
■
[2-03] Set point: high water temperature to be reached.
■
[2-04] Interval: time period defining how long the set point temperature should be maintained.
T
DHW
[2-03]
[2-04]
T
H
T
U
Space cooling/heating always has priority over the disinfection function.
The disinfection function is only possible when the unit is not operating for space cooling/heating.
To allow the disinfection function, the schedule timers must be used. Set the disinfection function settings so that it is combined with the domestic hot water function that is running during disabled space heating/cooling interval. It is advised to run the disinfection function for minimum 1 hour.
Refer to the extra addendum of the operation manual for an example pattern.
Refer to the operation manual for a detailed explanation how to program the schedule timer.
If using a room thermostat, the disinfection function is not possible as long as the room thermostat demands cooling or heating. In this case, de-activate the room thermostat demand by its schedule timer. Refer to the manual of the room thermostat for a detailed explanation on how to de-activate space cooling/heating by schedule timer.
[3] Auto restart
When power returns after a power supply failure, the auto restart function reapplies the user interface settings at the time of the power supply failure.
NOTE
It is therefore recommended to leave the auto restart function enabled.
Note that with the function disabled the schedule timer will not be activated when power returns to the unit after a power supply failure.
Press the pr button to enable the schedule timer again.
■
[3-00] Status: defines whether the auto restart function is turned ON (0) or OFF (1).
Before changing field settings for domestic water heating, read attentively the warnings mentioned in the paragraph
"Introduction" on page 1
[4] Space heating off temperature and booster heater operation
■
[4-02] Space heating off temperature: outdoor temperature above which space heating is turned off, to avoid overheating.
■
[4-03] Booster heater operation: defines whether the optional booster heater operation is enabled (1) or limited (0).
NOTE
If the booster heater operation is limited than the booster heater operation is only allowed during the disinfection function [2]. (Refer to
"[2]
Disinfection function" on page 18
T
DHW
T
U
T
H t
00.00
01.00
22.00
23.00
24.00
t
[2-02]
Domestic hot water temperature
User set point temperature (as set on the user interface)
High set point temperature [2-03]
Time
Installation manual
18
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system
4PW48441-1B
[6] DT for domestic water heating
Before changing field settings for domestic water heating, read attentively the warnings mentioned in the paragraph
"Domestic hot water tank (option)" on page 2
Applies only to installations with a domestic hot water tank.
The 'DT (delta temperature) for domestic water heating' field settings determine the temperatures at which heating of the domestic water by the heat pump will be started (i.e., the heat pump ON temperature) and stopped (i.e., the heat pump OFF temperature).
When the domestic hot water temperature drops below the heat pump ON temperature (
T
HP ON
), heating of the domestic water by the heat pump CAN be started. As soon as the domestic hot water temperature reaches the heat pump OFF temperature (
T
HP OFF
) or the user set point temperature (
T
U
), heating of the domestic water by the heat pump will be stopped (by switching the 3-way valve).
The heat pump OFF temperature, and the heat pump ON temperature, and its relation with field settings [6-00] and [6-01] are explained in the illustration below.
■
[6-00] Start: temperature difference determining the heat pump ON temperature (
T
HP ON
). See illustration.
■
[6-01] Stop: temperature difference determining the heat pump OFF temperature (
T
HP OFF
). See illustration.
T
U
> T
HP MAX
T(
°
C)
70 T
U
T
U
= 70
°
C
[6-01] = 7
°
C
[6-00] = 7
°
C
T
U
< T
HP MAX
T(
°
C)
T
U
= 45
°
C
[6-01] = 7
°
C
[6-00] = 7
°
C
55
48
41
T
HP MAX
T
HP OFF
[6-01]
T
HP ON
[6-00]
55 T
HP MAX
45
38
T
U
= T
HP OFF
[6-00]
T
HP ON
T
U
T
HP MAX
T
HP OFF
T
HP ON
User set point temperature (as set on the user interface)
Maximum heat pump temperature at sensor in domestic hot water tank (55°C)
Heat pump OFF temperature
Heat pump ON temperature
[7] Domestic hot water step length
Before changing field settings for domestic water heating, read attentively the warnings mentioned in the paragraph
"Domestic hot water tank (option)" on page 2
Applies only to installations with a domestic hot water tank.
When the domestic water is heated and the domestic hot water set point temperature (as set by the user) has been reached, the booster heater will continue to heat the domestic water to a temperature a few degrees above the set point temperature, i.e. the booster heater
OFF temperature. These extra degrees are specified by the domestic hot water step length field setting. Correct setting prevents the booster heater from repeatedly turning on and off (i.e. chattering) to maintain the domestic hot water set point temperature. Note: the booster heater will turn back on when the domestic hot water temperature drops 2°C (fixed value) below the booster heater OFF temperature.
NOTE
If the schedule timer for booster heater (see the operation manual) is active, the booster heater will only operate if allowed by this schedule timer.
■
[7-00] Domestic hot water step length: temperature difference above the domestic hot water set point temperature before the booster heater is turned off.
T
DHW
T
BH OFF
T
BH ON
T
U
T
HP MAX
T
HP OFF
T
HP ON
55
48
41
73
71
70
60
40
[7-00]
[6-01]
[6-00]
30
20
10
HP BH
T
U
= 70
°
C
[7-00] = 3
°
C
[6-01] = 7
°
C
[6-00] = 7
°
C
HP
0
BH
HP
T
BH OFF
T
BH ON
T
HP MAX
T
HP OFF
T
HP ON
T
DHW
T
U t
Booster heater
Heat pump. If heating up time by the heat pump takes too long, auxiliary heating by the booster heater can take place
Booster heater OFF temperature (T
U
+ [7-00])
Booster heater ON temperature (T
BH OFF
– 2°C)
Maximum heat pump temperature at sensor in domestic hot water tank
Heat pump OFF temperature (T
HP MAX
– [6-01])
Heat pump ON temperature (T
HP OFF
– [6-00])
Domestic hot water temperature
User set point temperature (as set on the user interface)
Time t
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system
4PW48441-1B
Installation manual
19
[8] Domestic water heating mode timer
Before changing field settings for domestic water heating, read attentively the warnings mentioned in the paragraph
"Domestic hot water tank (option)" on page 2
Applies only to installations with a domestic hot water tank.
The 'domestic water heating mode timer' field settings defines the minimum and maximum domestic water heating times, and minimum time between two domestic water heating cycli.
■
[8-00] Minimum running time: specifies the minimum time period during which domestic water heating should be activated, even when the target domestic hot water temperature has already been reached.
■
[8-01] Maximum running time: specifies the maximum time period during which domestic water heating can be activated, even when the target domestic hot water temperature has not yet been reached.
Note that when the unit is configured to work with a room
"Room thermostat installation configuration" on page 14
), the maximum running time will
only be taken into account when there is a request for space cooling or space heating. When there is no request for room cooling or room heating, domestic water heating by the heat pump will continue until the 'heat pump OFF temperature'
(see field settings
"[6] DT for domestic water heating"
reached. When no room thermostat is installed, the timer is always taken into account.
■
[8-02] Anti-recycling time: specifies the minimum required interval between two domestic water heating cycli.
1
2 t
1
0
1
0
[8-00]
[8-01] [8-02]
Domestic water heating (1 = active, 0 = not active)
Hot water request (1 = request, 0 = no request)
Time t
[9] Cooling and heating set points
The purpose of this field setting is to prevent the user from selecting a wrong (i.e., too hot or too cold) leaving water temperature. Thereto the heating temperature set point range and the cooling temperature set point range available to the user can be configured.
■
In case of a floor heating application, it is important to limit the maximum leaving water temperature at heating operation according to the specifications of the floor heating installation.
■
In case of a floor cooling application, it is important to limit the minimum leaving water temperature at cooling operation to 16°C to prevent condensation on the floor.
■
[9-00] Heating set point upper limit: maximum leaving water temperature for heating operation.
■
[9-01] Heating set point lower limit: minimum leaving water temperature for heating operation.
■
[9-02] Cooling set point upper limit: maximum leaving water temperature for cooling operation.
■
[9-03] Cooling set point lower limit: minimum leaving water temperature for cooling operation.
■
[9-04] Overshoot setting: defines how much the water temperature may rise above the setpoint before the compressor stops. This function is only applicable in heating mode.
[C] Solar priority mode
■
[C-00] For information concerning the EKSOLHW solar kit, refer to the installation manual of that kit.
■
[C-01] Defines the logic of the alarm output on the EKRP1HB remote alarm input/output PCB.
If [C-01]=0, the alarm output will be powered when an alarm occurs (default).
If [C-01]=1, the alarm output will not be powered when an alarm occurs. This field setting allows for distinction between detection of an alarm and detection of a power failure to the unit.
[C-01]
0
(default)
1
Alarm
Closed output
Open output
No alarm
Open output
Closed output
No power supply to unit
Open output
Open output
[D] Restricted power supply condition mode
[D-02] is set to 1 by default: The restricted power supply condition mode is enabled. Do not change this value.
[E] Unit information readout
■
[E-00] Readout of the software version (example: 23)
■
[E-01] Readout of the EEPROM version (example: 23)
■
[E-02] Readout of the unit model identification (example: 11)
■
[E-03] Readout of the liquid refrigerant temperature
■
[E-04] Readout of the inlet water temperature
NOTE
[E-03] and [E-04] readouts are not permanently refreshed. Temperature readouts are updated after looping through the field setting first codes again only.
Installation manual
20
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system
4PW48441-1B
Field settings table
First code
Second code Setting name
0
User permission level
00 User permission level
1
Weather dependent set point
00 Low ambient temperature (Lo_A)
01 High ambient temperature (Hi_A)
2
02 Set point at low ambient temperature (Lo_TI)
03 Set point at high ambient temperature (Hi_TI)
Disinfection function
00 Operation interval
3
4
5
6
7
8
9
C
01 Status
02 Start time
03 Set point
04 Interval
Auto restart
00 Status
Space heating off temperature
00 Not applicable. Do not change the default value!
01 Not applicable. Do not change the default value!
02 Space heating off temperature
03 Booster heater operation
Space heating priority temperature
00 Not applicable. Do not change the default value!
01 Not applicable. Do not change the default value!
02 Not applicable. Do not change the default value!
03 Not applicable. Do not change the default value!
04 Not applicable. Do not change the default value!
DT for domestic water heating
00 Start
01 Stop
Domestic hot water step length
00 Domestic hot water step length
Domestic water heating mode timer
00 Minimum running time
01 Maximum running time
02 Anti-recycling time
03 Not applicable. Do not change the default value!
Cooling and heating set point ranges
00 Heating set point upper limit
01 Heating set point lower limit
02 Cooling set point upper limit
03 Cooling set point lower limit
04 Overshoot setting
Solar priority mode
00 Solar priority mode setting
01 Output logic of the EKRP1HB remote alarm input/output PCB
Installer setting at variance with default value
Date Value Date Value
Default value Range
3
–10
15
40
25
Fri
1 (ON)
23:00
70
10
Mon~Sun,
All
0/1
0:00~23:00
40~80
5~60
—
—
1:00
5
5
—
— hour
°C min
0 (ON)
25
1
1
0
0
0
10
1
0
5
2
3
55
25
22
5
2
5
30
3
20
0
0
2/3
–20~5
10~20
25~55
25~55
0/1
—
—
14~25
0/1
—
—
—
—
—
1~20
2~10
0~4
0~20
5~95
0~10
—
37~55
15~37
18~22
5~18
1~4
0/1
0/1
Step Unit
—
1
1
1
1
—
—
—
—
—
—
—
—
1
—
1
1
1
—
1
5
0.5
— min min hour
—
1
—
1
1
1
1
1
°C
°C
°C
°C
°C
—
—
—
—
—
—
—
—
—
°C
—
°C
°C
°C
°C
—
°C
°C
°C
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system
4PW48441-1B
Installation manual
21
First code
Second code Setting name
D
Restricted power supply condition mode
00 Not applicable. Do not change the default value!
E
01 Not applicable. Do not change the default value!
02 Not applicable. Do not change the default value!
Unit information readout
00 Software version
01 EEPROM version
Installer setting at variance with default value
Date Value Date Value
02 Unit model identification
03 Liquid refrigerant temperature
04 Inlet water temperature
Default value Range
0
0
1
Read only
Read only
Read only
Read only
Read only
—
—
—
—
—
—
—
—
Step Unit
—
—
—
—
—
—
—
—
—
—
—
—
°C
°C
—
—
Installation manual
22
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system
4PW48441-1B
T
EST RUN AND FINAL CHECK
The installer is obliged to verify correct operation of the indoor and outdoor unit after installation.
Automatic test run
When the unit is put into operation (by pressing the y button) for the first time, the system will automatically perform a test run in cooling mode. The test run will take up to 3 minutes, during which no specific indication is given on the user interface.
During the automatic test run, it is important to ensure that the water temperature does not drop below 10°C, which might activate the freeze-up protection and thereby prevent the test run to finish.
Should the water temperature drop below 10°C, press the h / c button so the h icon is displayed. This will activate the backup heater during the automatic test run and raise the water temperature sufficiently.
If the automatic test run has ended successfully, the system will automatically resume normal operation.
If there are misconnections or malfunctions, an error code will be displayed on the user interface. To resolve the error codes, see
"Error codes" on page 25
NOTE
When the outdoor unit is put into pump down operation
(see the outdoor unit installation manual), the automatic test run flag will be cleared. The next time the system is put into operation, the automatic test run will be executed again.
Test run operation (manual)
If required, the installer can perform a manual test run operation at any time to check correct operation of cooling, heating and domestic water heating.
Procedure
1
Push the z button 4 times so the t icon will be displayed.
2
Depending on the indoor unit model, heating operation, cooling operation or both must be tested as follows (when no action is performed, the user interface will return to normal mode after 10 seconds or by pressing the z button once):
• To test the heating operation push the h
/ c
button so the h icon is displayed. To start the test run operation press the y
button.
• To test the cooling operation push the h
/ c
button so the c icon is displayed. To start the test run operation press the y
button.
• To test the domestic water heating operation push the v button. The test run operation will start without pressing the y
button.
3
The test run operation will end automatically after 30 minutes or when reaching the set temperature. The test run operation can be stopped manually by pressing the z
button once. If there are misconnections or malfunctions, an error code will be displayed on the user interface. Otherwise, the user interface will return to normal operation.
4
To resolve the error codes, see
"Error codes" on page 25
NOTE
To display the last resolved error code, push the z button 1 time. Push the z
button again 4 times to return to normal mode.
NOTE
It is not possible to perform a test run if a forced operation from the outdoor unit is in progress. Should forced operation be started during a test run, the test run will be aborted.
Final check
Before switching on the unit, read following recommendations:
■
When the complete installation and all necessary settings have been carried out, close all front panels of the unit and refit the indoor unit cover.
■
The service panel of the switch box may only be opened by a licensed electrician for maintenance purposes.
M
AINTENANCE
In order to ensure optimal availability of the unit, a number of checks and inspections on the unit and the field wiring have to be carried out at regular intervals.
■
Before carrying out any maintenance or repair activity, always switch off the circuit breaker on the supply panel, remove the fuses or open the protection devices of the unit.
■
Make sure that before starting any maintenance or repair activity, also the power supply to the outdoor unit is switched off.
The described checks must be executed at least once a year.
1
Water pressure
Check if the water pressure is above 0.3 bar. If necessary add water.
2
Water filter
Clean the water filter.
3
Water pressure relief valve
Check for correct operation of the pressure relief valve by turning the red knob on the valve counter-clockwise:
■
If you do not hear a clacking sound, contact your local dealer.
■
In case the water keeps running out of the unit, close both the water inlet and outlet shut-off valves first and then contact your local dealer.
4
Pressure relief valve hose
Check that the pressure relief valve hose is positioned appropriately to drain the water.
If the (optional) drain pan kit is installed, make sure that the pressure relief valve hose end is positioned in the drain pan.
5
Backup heater vessel insulation cover
Check that the backup heater insulation cover is fastened tightly around the backup heater vessel.
6
Domestic hot water tank pressure relief valve (field supply)
Applies only to installations with a domestic hot water tank.
Check for correct operation of the pressure relief valve on the domestic hot water tank.
7
Domestic hot water tank booster heater
Applies only to installations with a domestic hot water tank.
It is advisable to remove lime buildup on the booster heater to extend its life span, especially in regions with hard water. To do so, drain the domestic hot water tank, remove the booster heater from the domestic hot water tank and immerse in a bucket (or similar) with lime-removing product for 24 hours.
8
Indoor unit switch box
■
Carry out a thorough visual inspection of the switch box and look for obvious defects such as loose connections or defective wiring.
■
Check for correct operation of contactors K1M, K3M and
K5M by use of an ohmmeter. All contacts of these contactors must be in open position.
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system
4PW48441-1B
Installation manual
23
T
ROUBLESHOOTING
This section provides useful information for diagnosing and correcting certain troubles which may occur in the unit.
General guidelines
Before starting the troubleshooting procedure, carry out a thorough visual inspection of the unit and look for obvious defects such as loose connections or defective wiring.
Before contacting your local dealer, read this chapter carefully, it will save you time and money.
When carrying out an inspection on the switch box of the unit, always make sure that the main switch of the unit is switched off.
When a safety device was activated, stop the unit and find out why the safety device was activated before resetting it. Under no circumstances safety devices may be bridged or changed to a value other than the factory setting. If the cause of the problem cannot be found, call your local dealer
.
If the pressure relief valve is not working correctly and is to be replaced, always reconnect the flexible hose attached to the pressure relief valve, to avoid water dripping out of the unit!
NOTE
For problems related to the optional solar kit for domestic water heating, refer to the troubleshooting in the installation manual of that kit.
General symptoms
Symptom 1: The unit is turned on (
y
LED is lit) but the unit is not heating or cooling as expected
P
OSSIBLE CAUSES
The temperature setting is not correct.
The water flow is too low.
C
ORRECTIVE ACTION
Check the controller set point.
The water volume in the installation is too low.
• Check that all shut off valves of the water circuit are completely open.
• Check if the water filter needs cleaning.
• Make sure there is no air in the system (purge air).
• Check on the manometer that there is sufficient water pressure. The water pressure must be >0.3 bar
(water is cold), >>0.3 bar (water is hot).
• Check that the pump speed setting is on the highest speed.
• Make sure that the expansion vessel is not broken.
• Check that the resistance in the water circuit is not too high for the pump (refer to
"Setting the pump speed" on page 16 ).
Make sure that the water volume in the installation is above the minimum required value (refer to
"Checking the water volume and expansion vessel pre-pressure" on page 10
).
Symptom 2: The unit is turned on but the compressor is not starting
(space heating or domestic water heating)
P
OSSIBLE CAUSES
The unit must start up out of its operation range (the water temperature is too low).
C
ORRECTIVE ACTION
In case of low water temperature, the system utilizes the backup heater to reach the minimum water temperature first (15°C).
• Check that the backup heater power supply is correct.
• Check that the backup heater thermal fuse is closed.
• Check that the backup heater thermal protector is not activated.
• Check that the backup heater contactors are not broken.
Symptom 3: Pump is making noise (cavitation)
OSSIBLE CAUSES
There is air in the system.
Water pressure at pump inlet is too low.
P C
ORRECTIVE ACTION
Purge air.
• Check on the manometer that there is sufficient water pressure. The water pressure must be >0.3 bar
(water is cold), >>0.3 bar (water is hot).
• Check that the manometer is not broken.
• Check that the expansion vessel is not broken.
• Check that the setting of the prepressure of the expansion vessel is correct (refer to
"Setting the prepressure of the expansion vessel" on page 11
).
Symptom 4: The water pressure relief valve opens
P
OSSIBLE CAUSES
The expansion vessel is broken.
The water volume in the installation is too high.
C
ORRECTIVE ACTION
Replace the expansion vessel.
Make sure that the water volume in the installation is under the maximum allowed value (refer to
"Checking the water volume and expansion vessel pre-pressure" on page 10 ).
Symptom 5: The water pressure relief valve leaks
P
OSSIBLE CAUSES
Dirt is blocking the water pressure relief valve outlet.
C
ORRECTIVE ACTION
Check for correct operation of the pressure relief valve by turning the red knob on the valve counter clockwise:
• If you do not hear a clacking sound, contact your local dealer.
• In case the water keeps running out of the unit, close both the water inlet and outlet shut-off valves first and then contact your local dealer.
Symptom 6: The user interface displays "
n
" when pressing certain buttons
P
OSSIBLE CAUSES
The current permission level is set to a level that prevents using the pressed button.
C
ORRECTIVE ACTION
Change the "user permission level"
field setting ([0-00], see "Field settings" on page 16 .
Symptom 7: Space heating capacity shortage at low outdoor temperatures
P
OSSIBLE CAUSES
Backup heater operation is not activated.
C
ORRECTIVE ACTION
Check that the "backup heater operation status" field setting [4-00] is turned on, see
Check whether or not the thermal protector of the backup heater has been activated (refer to
Main components , "Backup heater thermal protector" on page 6
for location of the reset button).
Check whether or not the thermal fuse of the backup heater is blown
(refer to
,
"Backup heater thermal fuse" on page 6 for location of the reset
button).
Symptom 8: Unexpected backup heater operation
P
OSSIBLE CAUSES
Entering water temperature is too low and leaving water temperature
>25°C.
Too frequent use of the backup heater during heating operation or domestic water heating.
C
ORRECTIVE ACTION
Increase the water flow.
The water volume in the cicuit is too low.
Installation manual
24
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system
4PW48441-1B
Error codes
When a safety device is activated, the user interface LED will be flashing, and an error code will be displayed.
A list of all errors and corrective actions can be found in the table below.
Reset the safety by turning the unit OFF and back ON.
Instruction to turn the unit OFF
User interface mode
(heating/cooling
=
)
Domestic water heating mode (
w
)
ON
ON
ON
OFF
OFF
OFF
ON
OFF
Push the
y
button
Push the
v
button
1 time
1 time
1 time
—
—
—
1 time
—
In case this procedure for resetting the safety is not successful, contact your local dealer.
Error code Failure cause
80
81
Inlet water temperature thermistor failure (inlet water thermistor broken)
Outlet water temperature thermistor failure (outlet water temperature sensor broken)
89
7H
Water heat exchanger freeze-up failure (due to water flow too low)
Water heat exchanger freeze-up failure (due to refrigerant shortage)
Flow failure (water flow too low or no water flow at all, minimum required water flow is 12 l/min)
8H
A1
A5
Outlet water temperature of indoor unit too high (>65°C)
Indoor unit PCB defective
Too low (during cooling operation) or too high (during heating operation) refrigerant temperature (measured by R3T)
Corrective action
Contact your local dealer.
Contact your local dealer.
Refer to error code
7H
.
Contact your local dealer.
• Check that all shut off valves of the water circuit are completely open.
• Check if the water filter needs
• cleaning.
Check that the unit is operating within its operating range (refer to
"Technical specifications" on page 26 ).
• Also refer to
• Make sure there is no air in the system (purge air).
• Check on the manometer that there is sufficient water pressure. The water pressure must be >0.3 bar (water is cold),
>>0.3 bar (water is hot).
• Check that the pump speed setting is on the highest speed.
• Make sure that the expansion vessel is not broken.
• Check that the resistance in the water circuit is not too high for the pump (refer to
"Setting the pump speed" on page 16
).
• If this error occurs at defrost operation (during space heating or domestic water heating), make sure that the backup heater power supply is wired correctly and that fuses are not blown.
• Check that the pump fuse (FU2) and PCB fuse (FU1) are not blown.
• Check that the contactor of the electric backup heater is not short circuited.
• Check that the outlet water thermistor is giving the correct read out.
Contact your local dealer.
Contact your local dealer.
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system
4PW48441-1B
Error code Failure cause
AA
Booster heater thermal protector is open (applies only to installations with a domestic hot water tank)
Secondary thermal protector is open (applies only to units with a
EKHWSU domestic hot water tank installed)
Backup heater thermal protector is open
C0
C4
E1
E3
E4
E5
E7
E9
EC
F3
H9
HC
Corrective action
Reset the thermal protector
Reset the thermal protector
Reset the thermal protector by pressing the reset button (refer to
for location of the reset button)
Contact your local dealer.
Check the reset button of the thermal protector.
If both the thermal protector and the controller are reset, but the
AA
error code persists, the backup heater thermal fuse has blown.
Flow switch failure (flow switch remains closed while pump is stopped)
Check that the flow switch is not clogged with dirt.
Heat exchanger thermistor failure (heat exchanger temperature sensor broken)
Outdoor unit PCB defective
Fan lock failure (fan is locked)
Contact your local dealer.
Contact your local dealer.
Abnormal high pressure Check that the unit is operating within its operating range (refer to
"Technical specifications" on page 26
).
Contact your local dealer.
Actuation of low pressure sensor Check that the unit is operating within its operating range (refer to
"Technical specifications" on page 26
).
Contact your local dealer.
Overload activation of compressor
Check that the unit is operating within its operating range (refer to
"Technical specifications" on page 26
).
Contact your local dealer.
Check if the fan is not obstructed by dirt. If the fan is not obstructed, contact your local dealer.
Contact your local dealer.
Malfunction of electronic expansion valve
Domestic hot water temperature too high (>89°C)
Too high discharge temperature
(e.g. due to outdoor coil blockage)
Outdoor temperature thermistor failure (outdoor thermistor is broken)
Domestic hot water tank thermistor failure
• Check that the contactor of the electric booster heater is not short circuited.
• Check that the domestic hot water thermistor is giving the correct read out.
Clean the outdoor coil. If the coil is clean, contact your local dealer.
Contact your local dealer.
Contact your local dealer.
J1
J3
J5
J6
J7
J8
L4
L5
L8
L9
LC
P1
Malfunction of pressure sensor Contact your local dealer.
Discharge pipe thermistor failure Contact your local dealer.
Contact your local dealer.
Suction pipe outdoor unit thermistor failure
Aircoil thermistor frost detection failure
Contact your local dealer.
Contact your local dealer.
Aircoil thermistor mean temperature failure
Liquid pipe outdoor unit thermistor failure
Electric component failure
Electric component failure
Electric component failure
Contact your local dealer.
Contact your local dealer.
Contact your local dealer.
Electric component failure
Electric component failure
PCB failure
Contact your local dealer.
Contact your local dealer.
Contact your local dealer.
Contact your local dealer.
Installation manual
25
Error code Failure cause
P4
PJ
U0
Electric component failure
Failure of capacity setting
Refrigerant failure (due to refrigerant leak)
U2
U4
U5
U7
UA
Main circuit voltage failure
Communication failure
Communication failure
Communication failure
Communication failure
Corrective action
Contact your local dealer.
Contact your local dealer.
Contact your local dealer.
Contact your local dealer.
Contact your local dealer.
Contact your local dealer.
Contact your local dealer.
Contact your local dealer.
T
ECHNICAL SPECIFICATIONS
General
Nominal capacity
• cooling
• heating
Dimensions H x W x D
Weight
• machine weight
• operation weight
Connections
• water inlet/outlet
• water drain
• refrigerant liquid side
• refrigerant gas side
Expansion vessel
• volume
• maximum working pressure (MWP)
Pump
• type
• no. of speed
Sound pressure level
(a)
Internal water volume
Pressure relief valve water circuit
Operation range - water side
• heating
• cooling
Operation range - air side
• heating
• cooling
• domestic hot water by heat pump
(a) At 1 m in front of the unit (free field condition)
Electrical specifications
Standard unit (power supply via outdoor unit)
• power supply
• nominal running current
Backup heater
• power supply
• maximum running current
Installation manual
26
Heating/cooling models (EKHBX)
Refer to the Technical Data
Refer to the Technical Data
922 x 502 x 361
Heating only models (EKHBH)
922 x 502 x 361
50 kg
65 kg
G1 (male) hose nipple
Ø6.4 mm (1/4 inch)
Ø15.9 mm (5/8 inch)
10 l
3 bar
50 kg
65 kg
G1 (male) hose nipple
Ø6.4 mm (1/4 inch)
Ø15.9 mm (5/8 inch)
10 l
3 bar water cooled
3
28 dBA
5.5 l
3 bar
+25~+50°C
+5~+22°C
–20~+25°C
+10~+43°C
–15~+35°C water cooled
3
28 dBA
5.5 l
3 bar
+25~+50°C
—
–20~+25°C
—
–15~+35°C
Heating/cooling models (EKHBX) Heating only models (EKHBH)
230 V 50 Hz 1P
See outdoor unit installation manual
See
"Connection of the backup heater power supply" on page 13
See
"Connection of the backup heater power supply" on page 13
EKHBH/XE008AA3V3
Indoor unit for air to water heat pump system
4PW48441-1B
4PW48441-1B
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