老大)Manual for EVI Air Source Heat Pumps-2.cdr

EVI LOW AMBIENT
Air Source Heat Pump
Manual
Installation
Operation
Maintenance
Zhongshan Sundez Eco-energy Solution Co., Ltd.
www.sundez.cn
info@sundez.cn
INSTALLATION & OPERATION MANUAL
Contents
1. Features/Benefits..........................................................1
2. Notes/Precautions.........................................................2
3. Model Number Nomenclature.........................................3
4. Technical Data...............................................................4
4.1 Performance Data.......................................................4
4.2 Introduction on the System...........................................5
5. Dimension.....................................................................7
6. Installation....................................................................7
6.1 Transportation and Positioning.....................................7
6.2 Connect the Indoor and Outdoor Unit............................9
6.3 Install the Water Pipeline............................................12
6.4 Install Heat Consumer System....................................13
6.5 Electrical Connection.................................................14
6.6 Electrical Diagram......................................................15
7. Controller.....................................................................16
7.1 User Interface............................................................16
7.2 User Interface............................................................16
8. Maintenance and Trouble Shooting...............................22
8.1 Maintenance..............................................................22
8.2 Trouble Shooting........................................................23
8.3 Error Codes...............................................................25
9. Record for Maintenance & Trouble Shooting.................26
FEATURES/BENEFITS
1. Features/Benefits
Wide Application Ranges
Designed for offering central hot water for bigger houses, as well as commercial buildings
such as hotels, offices, schools, hospitals, apartments etc. The hot water outlet range is
wide from 20Deg C to 55Deg C, meeting demands for most hot water project. The
performance is at wide ambient temperature range from -25~40Deg C.
Assuring You Get Grants from Your Government
Designed for high efficiency performance over a lifetime of operation. The annual average
COP is up to 5.0. Efficiencies stated are in accordance with EN14511. The water pipes and
refrigerant pipes are well insulated to minimize the heat loss.
Durable and Long Life
High efficiency EVI scroll compressor for all units, with durable features against high
temperature and high pressure for long life. High efficiency plate heat exchanger for
high COP.
Strong Cabinet
Standard unit fabrication consists of heavy gage galvanized sheet metal cabinet
construction that provides maximum strength. All interior sheet metal surfaces are
powder-painted for maximum corrosion protection to ensure resilience for long term
vitality. Compact, stackable cabinets are designed to minimize installation space.
Full Consideration for Noise Control
Compressor rubber feet are specially selected for reducing vibration. Specially, compressor
sound jacket is designed for every unit. Well-balanced fans and fan motors, with the
motors, with the optimized fan holder, contributes to the low noise operation. The cabinet
inside is insulated to reduce noise transmission.
Reliable Design and Strict Quality Control
Standard safety features for the refrigerant circuit include high-pressure switch and
low-pressure switch to detect loss of refrigerant, as well as deficient water flow. Equipment
safety features include water loop temperature monitoring, voltage protection, water coil
freeze protection. All safety features are tested and run at the factory to assure proper
operation of all components and safety switches. All components are carefully designed
and selected for endurance, durability, and carefree day-to-day operation. Each unit is fully
tested in performance and safety before it is exported.
Simple Maintenance and Service ability
Full access for maintenance or service is provided from the maintenance panel, for better
flexibility in confined space. Easy removal of the control box from the unit provides access
to all refrigerant components. The refrigerant circuit is easily tested and serviced through
the use of high and low pressure ports integral to the refrigerant circuit.
1
NOTES/PRECAUTIONS
2. Notes/Precautions
■ The installation, commissioning and maintenance of the system should only be
done by qualified personnel with adequate knowledge of the relevant standards
and local regulations as well as experience with similar systems.
■ Please make sure the water flow is sufficient all the time.
■ All ground line connections must be prepared in accordance with relevant local
regulations.
■ To reduce the risk of electrical insulation faults, you first make the connection of
the protective conductor of the heat pump safe according to local regulations.
■ When installation, make sure that the inside wires are apart from hot or moving
parts [eg: compressor, fan] of the system to avoid damage to the wires.
■ For installation, make sure that the inside wires are apart from hot or moving
parts [eg: compressor, fan] of the system to avoid damage to the wires.
■ Anti-freezing measures must be well done to avoid damage to the water system
and the heat pump water heat exchanger.
■ Please make sure the lifting and transportation are safely done according to the
heat pump size and weight.
■ It is very dangerous work done at the facility without previously cutting off the
electricity from the main power source.
■ When installing the system, please ensure that no contaminants enter the water
cycle.
2
MODEL NUMBER NOMENCLATURE
3. Model Number Nomenclature
SD
AW - 125 - B -S-EVI
Enhanced Vapor Injection
Manufacturer
SD - Sundez
Power Supply
S - 3 phase
Omit - Single phase
Type
AW - air to water
WW - water to water
DC - DC inverter
WA- water to air
YC- swimming pool
Case Structure
A - vertical fan discharge
(monobloc)
B - horizontal fan discharge
(monobloc)
Nominal Compressor Power
075 - 3HP
125 - 5HP
250 - 10HP
3
TECHNICAL DATA
4. Technical Data
4.1. Performance Data
Model
Power Supply
Heating Capacity
Heating Power Input
Heating Capacity
Heating Power Input
Heating Capacity
V/ ph/ Hz
KWA7/ W35
KWA7/ W35
KWA7/ W45
KWA7/ W45
KWA-15/ W35
SDAW-075BEVI
220~240/ 1/ 50
11.8
3.1
11.7
3.3
7.3
SDAW-125BSEVI
380~400/ 3/ 50
17
3.7
16.5
4.15
11
SDAW-250BSEVI
380~400/ 3/ 50
34
7.4
33
8.3
22
Heating Power Input
KWA-15/ W35
3
4.38
8.76
7.6
3.4
68
13.4
1.7
Built-in
10
Scroll
1
R407C
1-1/ 4"F
11.5
4.79
41
7.7
2.7
Built-in
10
Scroll
1
R407C
1-1/ 4"F
23
9.58
41
15.7
5.6
Optional
15
Scroll
2
R407C
1-1/ 2"F
Heating Capacity
KWA-15/ W45
Heating Power Input
KWA-15/ W45
Heating Start Current
A
Heating Running Current
A
Water Flow Volume
Ton/ hour
Built-in Circulation Pump
Water Pressure Drop
KPa
Compressor Style
Compressor Quantity
pc
Refrigerant
Water Connection
Net Dimension(D*W*H)
Net Weight
Noise Level
Workable ambient
temperature
Maximum Hot Water
Outlet Temp.(Heating)
mm
kg
dBA
920*800*1590(outdoor) 920*800*1590(outdoor)
1200*900*1650
290*435*740(indoor) 290*435*740(indoor)
100(outdoor)
35(indoor)
130(outdoor)
40(indoor)
55(outdoor) 29(indoor) 55(outdoor)29(indoor)
280
58
℃
-25~35
-25~35
-25~35
℃
55
55
55
Test Condition: A7/ W35: Ambient Temp. DB/ WB 7/ 6DegC, Hot water outlet Temp. 35DegC.
4
INTRODUCTION ON THE SYSTEM
4.2 Introduction on the System
4.2.1 System Structure Diagram
Condenser
Sight glass Dry filter
Receiver
Solenoid Valve
Compressor
EEV
HX
TEV
Evaporator
5
INTRODUCTION ON THE SYSTEM
4.2.2 Components
Components
Scroll
Compressor
4-way-valve
Condenser
and HX heat
exchanger
2 way
thermostatic
expansion
valve
Evaporator
Fan
Photo
Features/Advantages
The EVI scroll compressor with R407C
system, favoring high heat capacity and
stable operation with low noise in
particularly low ambient temperature.
The reliable 4 way valve can avoid gas
mixing and unstable defrosting.
The stainless steel plate heat exchanger is
used by advantage of its large heat
exchanger area, high efficiency and low
water pressure drop.
The 2 way thermostatic expansion valve
ensures high efficiency for both heating and
defrosting.
The hydrophilic fin-tube heat exchanger has
big heat exchanging area and rational fin
distance, thus significantly improving heating
and defrosting efficiency.
The exterior motor fan, with 5 fan blades, is
strictly balanced. The 5 fan blades run
slower and make sure high air volume, thus
largely bringing down the noise.
6
DIMENSION
5 Dimension
Model
W
L
W
H
950
830
1600
SDAW-075-BEVI
SDAW-125-BSEVI
L
H
W
L
6 Installation
6.1. Transportation and positioning
6.1.1 Transportation
(1) To protect the equipment against damage, it must be transported vertically
inside its dedicated packaging. Storage and transport at temperature below
-20 Deg C and in excess of +50 Deg C is not permissible.
(2) The maximum acclivitous angle of heat pump must be less than 30 Deg C
when moving and installation.
6.1.2 Positioning
The heat pump is divided into 2 parts, outside unit and indoor unit.
Outdoor unit is designed for installation outdoor on a strong concrete base with
drainage around. There must be outlet for the refrigerant piping and the power
cables remained.
7
INSTALLATION
200mm
320mm
400mm
200mm
320mm
Refrigerant piping
and power cables
outlet direction
80mm
Refrigerant piping
and power cables
outlet hole from the casing
Front, Blower direction
Plan view of the concrete base
Remove the heat pump from its pallet with a hoist on the lift holes and position it on the
strong concrete base which should be at least 300mm in height.
Position the heat pump on the base
8
INSTALLATION
Indoor unit is designed to be installed indoor on the wall, dry position. It should
be considered about the length of the refrigerant copper pipes and the installation
distance of the indoor and outdoor unit.
Check the installation conditions:
• No risk from frost.
• Load-bearing wall.
• Vertical and solid wall as much as possible.
a quiet indoor unit operation on floating screeds, isolate the screed and
• For
the anti-vibration insulation from the surrounding of the installation location
•
•
of the indoor unit
The room must not be subject to a risk of explosion arising from dust, gases or
vapors. 1.5 meter above the ground, and service space in front of the indoor
.
unit
should have 1.5 to 2 meters.
When installing the heat pump in a boiler room together with other heating
equipment, ensure that the operation of other heating equipment will not be
impaired.
6.1.3 Condensation
Remove the back panel right under the evaporator and connect a drainage pipe
to the water pan connector in order to release the condensed water to the proper
place for drainage. There will be plenty of condensed water generated from the
evaporator, it must ensure the drainage pipe is without any obstacle.
6.2. Connect the indoor and outdoor unit
6.2.1 Refrigerant piping insulation and protection
As below picture shown, it must take the insulation treatment for the refrigerant
pipes and could use the 15mm to 20mm thickness PVC.
the two refrigerant copper pipes by insulation material separately in order
• toPack
organize the pipes easily by enswathing two pipes together, and should not
•
be forced tied too closely to prevent the frost caused by cold air.
The electricity cable can not contact with the refrigerant copper pipes.
Refrigerant copper pipe
Insulation material
Insulation material
Refrigerant copper pipe
Fig. Enswathing two refrigerant copper pipes
•
Arrange the refrigerant copper pipes between indoor and outdoor unit, and
make sure they are well protected if they are buried in the ground.
9
INSTALLATION
6.2.2 Connect the indoor and outdoor unit
(1) The specification of copper pipes as follows;
Copper pipe Spec.
Length
Refrigerant Inlet
φ19 mm
5 meters
Refrigerant Outlet
φ12.7mm
5 meters
(2) Refrigerant pipes connection
The length of copper pipe between the unit and the heat pump should be less
than 5 meters, and the height difference should less than 3 meters.
(3) Connect the pipes to the outdoor unit
1st Tank off the nut from the heat pump, expending the pipe
and connect it to the heat pump;
2nd Connect the pipe expending to the joints of the heat pump,
then screw the nut, the torque please refer to the picture.
Fig. The torque
3rd Screw on the nut step by step according to the torque as shown.
6.2.3 Leakage check
It is necessary to perform leakage check after finishing the refrigerant copper
pipes connection. Inject the nitrogen from the Refrigerant inlet until the pressure
is up to 3 Mpa, and then check the joints by the suds.
2.4 Vacuum and recharge refrigerant
The refrigerant has been charged into the refrigerant system in the factory. But
when finish the connection between the outdoor and indoor unit, it must be
vacuumed and recharged again.
1 st Unscrew the screw cap of the Refrigerant inlet on the heat pump, and connect
the multiplex manometer to the check valve.
2 nd Connect the vacuum pump to the multiplex manometer, then switch to vacuum
the whole refrigerant system. Make sure the absolute pressure is less than 70Pa
and vacuum for 60minutes.
3 rd When vacuuming has finished, charge the refrigerant into the refrigerant
system on the check valve.
10
INSTALLATION
Heat Pump
Outdoor Unit Indoor Unit
Low pressure
manometer
High pressure
manometer
Vacuum pump
Multiplex
manometer
Refrigerant outlet
Soft connection pipe
Refrigerant inlet
Fig. Vacuum the refrigerant system
Heat Pump
Outdoor Unit Indoor Unit
Low pressure
manometer
High pressure
manometer
Refrigerant
tank
Multiplex
manometer
Soft connection pipe
Refrigerant outlet
Refrigerant inlet
Fig. Recharge the refrigerant
11
INSTALLATION
6.2.5 Debug the indoor refrigerant system
When finish the connection, please release a little refrigerant from the
• Refrigerant
outlet, or use the vacuum pump to vacuum the system, until the
pressure is below 70Pa.
the system has been vacuumed, please open the Refrigerant inlet and
• Once
the Refrigerant outlet until the pressure is balanced, and then check the joints
with suds.
6.2.6 Connect communication cable
2 pairs of aviation connector are used for the
communication cable between the outdoor
and indoor unit. These aviation connectors
the sensors, water valve and water pump to
the control pcb.
Fig. Aviation Connector
6.3 Install the water pipeline
and overflow pipe should be installed near the gutter or the sinkhole
• forDrainage
efficient condensed water drainage. Discharge valve is necessary on the
drainage pipe.
•
Service valve needs to be installed before the magnet-valves on the system
pipeline for further inspection.
•
•
The pressure of the water outlet should be between 0.3Mpa and 0.6Mpa.
•
In winter, heat preservation may need to be carried out for the water supply
valve and the stop valve of the system (according to local ambient temperature)
for avoiding icing of the water supply pipe and the valves.
•
Keep the water pipes straight and the pipeline allocation reasonable. Reduce
pipe turnings as many as possible to reduce water resistance.
•
•
Prevent the pipeline and the connectors from water leakage.
•
Telescopic issue of the pipeline between heat pump unit and water tank
should be considered if plastic pipeline such as PPR pipe and ABS.
The water pressure bearing capability of each part of the piping system should
be tested after installation is finished. Drainage should be done to create a
clean interior system.
Measures of heat preservation for the hot water pipeline need to be conducted
after assuring no water leakage.
12
INSTALLATION
6.4 Install the heat consumer system
6.4.1 Install the heat consumer system (heating circuit) in accordance with current
technical guidelines. For safety equipment on the heating system, consult page 2
of DIN4751 or local regulations.
Prior to connecting the heat pump, check the heating system for leaks, flush it
thoroughly, fill and carefully vent it.
When filling the system with heating water, observe VDI2035, sheet 1, or local
regulations.
In particular, this means:
During the service life of the system, the local of the fill and top-up water must
• not
exceed 3 times the nominal volume of the heating system.
• The total alkaline earths in the water must be ‹3.0 mol/m .
• The total water hardness must be ‹3.0 mol/L.
the water, if the above conditions can not be satisfied, Generally soften
• Soften
the heating water, if the specific system volume › 20L/kw output (e.g. system
3
with buffer cylinder).
Check the correct connection of heating flow and return. The reduction of structure
-borne vibrations on the water side requires the installation of flexible pressure
hoses. Fit the thermal insulation in accordance with local regulations appertaining
heating system.
6.4.2 Buffer tank ( cylinder )
A buffer tank is recommended to ensure trouble-free for heat pump operation.
The buffer tank provides hydraulic separation of the volume flow in the heat pump
circuit and the heating circuit, The flow rate in the indoor unit remains constant if,
for example, the flow rate in the heating circuit is reduced by thermostatic valves.
Model
Recommended
buffer tank
SDAW-075BEVI
200L
SDAW-125BSEVI
SDAW-250BSEVI
200L
200L
6.4.3 Heat meter
Observe the additional pressure drop when installing heat meter on the heating
circuit.The sieves inside the heat meters are easily blocked by the dirt particles
in the heating circuit, further increasing the pressure drop.
13
INSTALLATION
6.4.4 Oxygen diffusion
Steel components, such as radiator ans pipes, can corrode if plastic under floor
heating system pipes, which are permeable to oxygen, are used.
The product of corrosion, for example, rusty sludge, can settle inside the heat
exchanger and can result in output loss through a reduction of cross-section or
in a heat pump shutdown triggered by the high pressure limiter.
Therefore it is advisable to avoid open heating system or the installation of steel
pipes in conjunction with plastic pipes in under floor heating systems, which are
permeable to oxygen.
6.4.5 Scaling
Water quality, operating conditions and the water volume are decisive factors to
the extent of scaling, To prevent damage to valves, heat exchanger and heating
elements check the water condition and assess it in accordance with VDI2035
( or local regulations ).
6.5. Electrical connection
Notify your local power supply company of the electrical connection.
Only qualified electricians must carry out the installation in accordance with these
instructions.
Before any work, isolate the equipment from the power supply at the control panel.
Observe VED0100 ( or local regulations ) and the regulations of your local power
supply company. The heat pump must be able to be separated from the main power
supply by an additional isolator, which disconnects all poles with at least 3mm
contact separation. For this purpose, use contactors, mains isolators, fuses, and
so on, on site.
Terminals are located inside the control board, The terminals become accessible
by opening the front panel right under the blower.
Installation Example for Reference
Heat Pump
Outdoor Unit
Indoor Unit
Refrigerant Pipes
14
INSTALLATION
6.6 Electric Diagram
4 way valve
Hot water switch
2nd Grade(blue)
H.P. switch
to display panel
L.P. switch
Interlock
connection
Tank temp.
Spare
Use
Expansion valve 2
Expansion valve 1
Tank temp.
Fan 2
TB
HX-1 inlet water temp.
HX-2 inlet water temp.
Fan 1
Coil1 Temp.
Coil2 Temp.
4 way
valve
HX-1 Outlet water temp.
HX-2 Outlet water temp.
Pipe
electric
Heater
Spare use
Pump
TB terminal board
Circuit breaker
TB
QF
Thermal relay
FR1
Comp.heat cable
CCH
KM1-3
Explanation
Symbol
Comp.
W
V
FR1
*2
*1
L1
L2
L3
N
QF
KM1
U
*4
*3
M
*5
*6 *22
*21
CCH
A
Symbol Explanation
A2
Symbol Explanation :
Fan
M
KM3
KM2
to
Contactor
Pump
M
2nd Grade(yellow)
TB
C
B
A
Tank heater
User wire
Ambient temp.
Comp.1
Factory wire
Exhaust temp.2
Explanation:
1、"*#" is the series number of components,
please do not mix up it with the wire number
Exhaust temp.1
Comp.2
15
C O N TCONTROLLER
ROLLER
7 Controller
7.1 User Interface
LCD screen & Touchable key-board
Logo readout
(Set in factory)
Water level
Unlock,
power on/off
Operating
Adding function
Heating mode
Minus function,
forced
defrosting/coolin
Water temp.,
error code,
data readout
Check,
data/code
On-line
readout
Timing log in/out,
clock setting
Timing/clock readout
Lock key
7.2 Operation
When it is powered on, buzz sound is made by the buzzer setting, and then the
screen is activated with glimmer light on; at this time the key board on the
touch screen is not available until it is unlocked.
7.2.1 Un-lock Key:
Touch the “ON/OFF” key for more than 3 seconds and do not remove your hand
until “DO--”sound can be heard; then the screen become of high-light,
meanwhile, key board is unlocked (no lock sign appears on the screen).
▲ In 60 seconds no action on the key-board, the screen is automatically locked
(Lock sign appears on the screen).
16
CONTROLLER
CONTROLLER
7.2.2 Power On/Off:
Touch the “ON/OFF” key by finger to power on/off the machine.
7.2.3 Temperature setting of water tank:
Touch the “Up”, then the symbol “temp. setting” is flickering and showing the temp. of the
water tank. Touch” Up” again to raise the temp. In the same way, touch “Down” twice to
lower the temp. (Temp. setting range: 20~L4℃; temp. of the water tank: 30~99℃; 60℃ is
factory value..
Temp. setting signal is flashing.
Set temp. of the water tank.
7.2.4 Data Setting:
Touch the “Setting” key, then checking mode comes.
Temp. checked.
Checking code.
Under checking mode.
17
C O N CONTROLLER
TROLLER
Touch the “Setting” Key, checking code A1~A9; Er are available. For single
system unit, touch “Setting” key twice to log out of the checking mode; for
double system unit, touch “Setting” key twice, checking code b1~b9 are
available, touch again to log out of the checking mode.
Domestic Unit
Single System Unit
Double System Unit
A1-Coil Temp .
A1-Coil Temp.
A1-Coil Temp. 1
b1-Coil Temp. 2
A2-Sunction Gas Temp.
A2-Sunction Gas Temp.
A2-Sunction Gas Temp. 1
b2-Sunction Gas Temp. 2
A3-Exhaust Gas Temp.
A3-Exhaust Gas Temp.
A3-Exhaust Gas Temp. 1
b3-Exhaust Gas Temp. 2
A4-Ambient Temp.
A4-Ambient Temp.
A4-Ambient Temp. 1
b4-Ambient Temp.
A5-00
A5-Water Outlet Temp.
A5-Water Outlet Temp. 1
b5-Water Outlet Temp. 2
A6-00
A6-Water Inlet Temp.
A6-Water Inlet Temp.
b6-Water Inlet Temp.
A7-00
A7-00
A7-00
b7-00
A8-00
A8-Compressor Current
A8-Compressor Current 1
b8-Compressor Current 2
A9-Opening of
Expansion valve
A9-Opening of
Expansion valve
A9-Opening of Expansion
valve 1
b9-Opening of Expansion
valve 2
Er-Error code
Er-Error code
Er-Error code
Er-Error code
7.2.5 Timing Setting:
Touch the “Timer” key to set the time of power on/off or water supply.
Power-on Time Setting:
Set “hour”: Once the power-on time setting mode is available, “hour” can be
set at once.
Set “minute”: touch “Timer” key twice.
Power-off Time Setting:
Set “hour”: Once the power-off time setting mode is available, “hour” can be
set at once.
Set “minute”, touch “Timer” four times continuously.
After first-time-mode (first power on/off time) setting, touching “Timer” Key
refers to second-time-mode (2nd power on/off time) setting.
After all time setting is completed, touch “Timer” key to log out. Patterns of
power on/off time appear on the screen after quitting all time mode setting.
18
CONTROLLER
Timer mode.
Set time is flashing. (Adjusted
by “Up” and “Down” keys)
Timer setting.
Time mode for power on/off:
01—power on/off time setting
02—power on/off time setting
Time mode for hot water supply:
03—water pump on/off time
setting
04—water pump on/off time
setting
Timed Power On/Off set.
▲How to cancel timing:
Keep touching “Timer” key for over 3 seconds till “DO---” sound is heard;
then time setting is canceled.
19
CONTROLLER
CONTROLLER
7.2.6 Clock Time Setting:
Under the condition of no time setting mode, keep touching “Timer” key for
more than 8 seconds till “DO---“ sound is heard, then clock time setting
comes.
Set “hour”:
Once the clock time setting mode is available,
“hour” can be set at once.
Set “minute”:
Touch “Timer” once.
Log out the clock time setting: touch “Timer” twice.
Clock time is flashing (Adjusted by “Up” and
“Down” keys).
Under clock time setting mode.
7.2.7 Time-limited Code Setting:
Keep touching “ Setting” key for more than 3 seconds till “DO---“ sound is
heard, then data setting comes. Keep touching “Setting” key again for more
than 8 seconds till “DO---“ sound is heard, then release your finger, timelimited code setting comes.
Code (Adjusted by “Up” and “Down” keys).
Code No.
Code setting mode.
20
CONTROLLER
Time-limited Code Setting:
C1: When in time-limited code setting mode, C1 can be set.
C2: C2 is set by touching “Setting” key again…
Code Setting Notes:
1) The code is made of 5 groups of numbers: C1, C2, C3, C4, C5,
among which there are 0~99 adjustable for C1, C2, C3, and C4; 0~15
adjustable for C5.
C1, C2, C3 and C4 belong to the code, while C5 is of system time-limited
month code. (▲Notice: as C5=0, time-limited function is unactivated; as
soon as C5=1~15 is set, system will be power-off in 1~15 months,
including period when heat pump is on suspension. Error code 11E on
screen.)
2) ① If the set code C1~C4 is different from last time's setting, code
setting mode is log out after setting. ② If the code is definitely the same
with last time’s setting, then time-limited new code setting mode comes.
C1~C4 is re-displayed. ③ If the original code is wanted to be retained,
the “Setting” key is needed to be touched continuously till C5 is
displayed. To touch the “Setting” key again after C5 setting refers to
successful re-setting and log-out
.
7.2.8 Forced Defrosting:
When system is power on and compressor is running, touch “Down” key
for more than 8 seconds till “DO---“ sound is heard, then defrosting
function is activated. Forced defrosting function is not log out until coil
temperature or defrosting time is achieved.
7.2.9 Water Cooling Function:
When system is power on, touch “Up” key for more than 8 seconds till
“DO---“ sound is heard, then water cooling function is activated.
Meanwhile, water temperature could be set from 5~30℃.Under cooling
mode, touch “Up” key again for more than 8 seconds till “DO---“ sound
is heard, it is shifted into heating mode.
21
MAINTENANCE
8. Maintenance and Trouble Shooting
8.1 Maintenance
• The heat pump water heater is an advanced equipment with high automization. The
reliability and operation life of the heat pump can be guaranteed and even increased by
regular inspection and effective maintenance.
• The external water filter should be cleaned regularly to ensure the cleanness of the water in
the system and avoid damage caused by blockage in the filter.
• All protective settings in the unit have been set before ex-factory. Users must not adjust it
when the heat pump unit is in use.
• Regular inspection is required for the power source and the wiring connection of the electric
system. Loose wiring connection and electric components should be repaired in time.
• The water supply system, relief valve of the water tank, water level control device and air
discharge device need to be checked regularly in case of low circulation water volume
caused by air entering the system, to ensure enough capacity and reliability of the heat
pump unit.
• Check the water pump and the valves on the pipes if they work well, and make sure there
is no leakage from connectors.
• Keep the surrounding of the heat pump dry, clean and ventilated. Regularly clean the
evaporator to keep high heat exchanging efficiency.
• Check the inside pipe connectors and refrigerant service port is dirty with oil. Make sure
there is no refrigerant leakage.
• Before stopping the heat pump for long time, drain out all water in the pipes, and shut off
the power supply, and put it into a shield. Full inspection of the system is required before
next operation.
• Users should call the installer or the seller every time when there is an error on the heat
pump controller.
• Clean the condenser with phosphoric acid of 15% consistence under temperature of 50~
60℃. Run the circulation pump for 3 hours, and then flush with fresh water for 3 times.
When installing the pipes, add a 3 way valve on the pipes and closed on outlet of it, for
cleaning use. Corrosive washing liquid is forbidden to clean the condenser.
• Clean the inside of the water tank after being used for a period (usually two months;
according to local water quality.)
22
TROUBLE SHOOTING
8.2 Trouble Shooting
Users should contact with the professional maintenance staff when there is a problem with
the heat pump. The following table may be helpful for maintenance technicians for
troubleshooting.
Malfunction
Heat pump unit is out
of operation
Possible Problems
Disposing Methods
1. Power source fault.
2. Loose connection of power
wire.
3. Power fuse burnt out.
4. Low water level switch is not
switched on.
1. Cut off the power source and
check.
2. check the power wire
connection.
3. Check the fuse and change it.
4. Supply water until the water
level switch is on.
Water pump is running 1. Lack of water in the system. 1. Fill water into the water
but no water circulation 2. Air exists in the water system. supply system.
or much noise made by 3. Some valves are not open
2. Discharge air from the water
water pump.
system.
4. The water filters is blocked.
3. Open all the valves in the
system.
4. Clean the water filter.
Low heating capacity
1. Lack of refrigerant.
2. Bad water system heat
preservation.
3. Low evaporator heat
transferring.
4. Low water flow volume.
1. leakage hunting and fix it,
discharge all the refrigerant
and inject the right amount.
2. improve the heat
preservation.
3. Wash the evaporator.
4. Clean the water filter.
Heavy frosting, low
heating capacity
1. The evaporator is too dirty
2. Defrost sensor fault.
3. The 4 way valve can not
change direction.
4. Over long defrosting
duration.
1. Wash the evaporator.
2. Change a new defrost sensor.
3. Check the solenoid if it is
energized.
4. Change the temperature for
entering defrost and the
duration.
High noise of
compressor
1. Liquid refrigerant into the
compressor.
2. Interior component of the
compressor is faulty.
1. Check if the thermostatic
expansion valve is faulty.
2. Change the compressor.
23
TROUBLE SHOOTING
Compressor is out
of operation
1. Power source fault.
2. Compressor AC conttactor
damaged.
3. Loosen wire connection.
4. Over-heat protection.
5. Over-high water temp.
6. Low water flow volume.
1. Check the power source and
change faulty components.
2. Change the contractor.
3. Check every wire connection of
compressor.
4. Check refrigerant leakage.
5. Bring down the water temp.
set value.
6. Clean the filter and check if
there is air inside the water
system.
Fan is out of
operation
1. Fan motor wire loosen.
2. Fan motor burnt.
3. Fan AC contractor fault.
1. Check every wire of the fan
connection.
2. change the motor.
3. change the AC contractor.
Low water flow
volume protection
1. Circulation pump fault.
1. Check the operation of the
2. Circulation pump is too small. circulation pump and fix it.
2. Change a bigger pump.
3. Water filter blockage.
4. Flow volume control device 3. Wash the water filter.
4. Adjust or change the flow
restore.
volume control device.
1. Low water flow volume.
1. Check the circulation pump,
Over-high
2. Thermostatic expansion
and the water filter.
compressor
valve openings is not correct, 2. Check and adjust the openings,
discharge pressure
blocked.
or directly change the expansion
valve.
Over-low
compressor
suction pressure
1. Not enough refrigerant.
1. Check refrigerant leakage.
2. Over-big pressure drop
2. Check and adjust the expansion
through the heat exchanger.
valve openings.
Shortage of oil in
compressor
Shortage of lubricant oil
Thermostatic
throttle valve can
not start
1. The switch for it is not open. 1. Inspect the power source of the
solenoid valve.
2. Low water pressure,
2. Check if there is blockage in the
over-small water pipe
pipes, and add boosting pump
diameter, over-long pipe
when necessary.
Find out the suitable kind of oil for
the compressor and inject some
amount.
24
ERROR CODES
8.3 Error Codes
Error Code
Error Description
Error
Error Description
01E
Wrong phase
16E
Coil temp. sensor error
02E
Default phase
18E
Exhaust gas temp. sensor error
03E
Water flow switch error
21E
Ambient air temp. sensor error
05E
High pressure error
22E
Returning water temp. sensor
error
06E
Low pressure error
25E
Water level switch error
09E
Communication error
27E
Outlet water temp. sensor error
11E
Time-limited error
28E
Suction gas temp. sensor error
12E
Exhaust gas temp. is too
high
31E
Water pressure switch error
15E
Water tank temp. sensor
error
35E
Compressor current error
IMPORTANT REMARK:
If a malfunction can not be resolved immediately, in order to analyze the problem
itself, we will need to know the message(error code) that is displayed on the
controller, as well as the values for the settings and for status of the heat pump
(ambient temperature, water inlet/outlet temperature and system coil
temperature) just before the failure or, if this is impossible, just after it. Please
keep this information at hand when calling customer service.
25
RECORD FOR MAINTENANCE & TROUBLE SHOOTING
9 Record for Maintenance & Trouble Shooting
Maintenance Record
1. Date:
Content:
2. Date:
Content:
3. Date:
Content:
Trouble-shooting Record
1. Time:
Problem:
Solution:
2. Time:
Problem:
Solution:
3. Time:
Problem:
Solution:
26
Thank You for
Choosing
Zhongshan Sundez Eco-energy Solution Co., Ltd.
www.sundez.cn
info@sundez.cn
Download PDF