Sundez SDWW-100 Service manual

SUNDEZ
Ground source Heat Pump
Heating/Cooling Series
(Heating only Series)
Installation&Instruction Manual
(Brine/water)

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Content
Ⅰ .SUNDEZ ground source heat pump introduction
1. Characteristics.....................................................................................2
2. Model number nomenclature..............................................................3
3. Performance parameter table...............................................................4
4. Dimension and conformation.............................................................5
5. Electrical diagram................................................................................8
Ⅱ. Installation..............................................................................................11
1. Transport and position......................................................................11
2. Pipeline installation system notice....................................................12
3. Installation of the heat source system.............................................12
4. Installation of the heat consumer system........................................13
5. Electrical connection.........................................................................14
6. Commissioning..................................................................................15
7. Maintenance and cleaning...............................................................16
8. Water quality standards...................................................................16
9. Using monoethylene glycol..............................................................18
Ⅲ. Operation of controller..........................................................................19
1. User interface.....................................................................................19
2. Operation...........................................................................................19
3. Usual malfunctions............................................................................24
Ⅳ.Maintenance information.........................................................................26
Ⅴ.System planning.....................................................................................27
1. Basic knowledge...............................................................................28
2. System planning................................................................................30
INSTALLATION & INSTRUCTION MANUAL

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Ⅰ.Introduction on SUNDEZ ground source heat pump
1. Characteristics
●
●
High quality construction
Quiet operation
Sundez ground source heat pump is a heating system designed for operation as
brine/water or water/water heat pump. The heat pump extracts energy from the heat
source medium i.e. brine at a low temperature level. This extracted energy is then
transferred to the heating water at a higher level, enriched with the energy
transferred by the compressor. The underground heat can be transferred through
the horizontal or vertical underground loop system. The heating water can be heated
up to a flow temperature of 55 .℃
Cabinet--Standard unit fabrication consists of heavy gage galvanized sheet metal
cabinet construction that provides maximum strength. All exterior sheet metal
surfaces are powder-coated for maximum corrosion protection to ensure resilience
for long term vitality. Compact, stackable cabinets are designed to minimize
installation space.
Compressor--Standard high-efficiency scroll compressor design for all units.
Compressor isolating springs are specially selected for each compressor size.
Refrigerant/water circuit--Units have a sealed refrigerant circuit including scroll
compressor(S). Refrigerant circuits are provided with a standard thermostatic
expansion valve(TEV) for higher accuracy and performance. The condenser and
evaporator are brazed stainless steel SUS316# plate heat exchangers with the
highest heat exchanging efficiency, outstanding ability against high pressure and
lower water quality.
The whole unit is designed for quiet operation. Compressor isolating springs are
specially selected for each compressor size. The floating design of the compressor
support with rubber isolators which completely separate the compressor from the
cabinet, to minimize vibrations to the unit structure.
●Built-in Hydraulic module, easy installation(Optional)
Hydraulic module(flow switch, expansion tank, water pumps, 3 way solenoid valve is
built-in.
INSTALLATION & INSTRUCTION MANUAL

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2. Model Number Nomenclature
SD WW - 160 - S
100: 10.6KW
160: 16.6KW
260: 26.6KW
Manufacturer:
Power Supply:
S: 380V/3ph/50Hz
Omit: 220V/1ph/50Hz
Type:
Heating capacity:
WW: ground source
(water to water)
SD - SUNDEZ
INSTALLATION & INSTRUCTION MANUAL

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3. Performance parameter table
INSTALLATION & INSTRUCTION MANUAL
Model SDWW-100 SDWW-160-S SDWW-260-S SDWW-320-S SDWW-500-S SDWW-600-S
Power Supply V/ph/Hz 220~240/1/50 380~400/3/50 380~400/3/50 380~400/3/50 380~400/3/50 380~400/3/50
Heating Capacity
(W7/W35) KW 10.6 16.6 26.6 33.2 53.2 62.4
Heating Power
Input (W7/W35) KW 2.9 4 5.9 7.9 12 14.3
Heating Capacity
(W7/W45) KW 10.2 16 25.6 32 51 61
Heating Power
Input (W7/W45) KW 3.3 4.5 6.7 8.8 13.4 16
Cooling Capacity
(W25/W7) KW 8.1 13.8 21 27.6 42 50
Cooling Power
Input (W25/W7) KW 2.7 3.6 5.57 7 11.4 13
Water Source
Flow Ton/hour 1.4 2.4 3.8 5 7.6 10
Air Condition
Water Flow Ton/hour 1.7 2.7 4.4 5.5 8.8 11
Air Condition
Water Pressure
Drop KPa 10 10 10 15 15 15
Compressor
Style Scroll Scroll Scroll Scroll Scroll Scroll
Compressor
Quantity pc 1 1 1 1 2 2
Refrigerant R410A R410A R410A R410A R410A R410A
Air
condition/Water
Source Pipe
Connection 1-1/4"F 1-1/4"F 1-1/2"F 1-1/2"F 2"F 2"F
Recommended
Buffer Tank L 200 200 200 200 300 300
Noise Level dBA 32 34 38 40 43 45
Water Source
Inlet Water
Temp.Range(He
ating) ℃-5 to +25 -5 to +25 -5 to +25 -5 to +25 -5 to +25 -5 to +25
Maximum Hot
Water Outlet
Temp.(Heating) ℃55 55 55 55 55 55
Cooling Start
Current A 65 35 55 35 55 64
Heating Start
Current A 68 41 60 41 60 69.5
Cooling Running
Current A 13 6 10.1 14.6 20.2 22.8
Heating Running
Current A 13.4 7.7 12.1 15.7 24.2 27.4
Net
Dimension(Dept
h*Width*Heigh) mm 690*620*1350 690*620*1350 690*620*1350 690*620*1350 1150*824*1204 1150*824*1204
Net Weight kg 100 130 250 280 330 350
Test condition: Cooling: W25/W7: Ground Source inlet Temp. 25℃, air condition water outlet 7℃.
Heating: W7/W35: Ground Source inlet Temp. 7℃, air condition water outlet 35℃

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4. Dimension and Conformation
Outer Case Dimension
Left-front View
DW
H
INSTALLATION & INSTRUCTION MANUAL
Model Dimension/D*W*H (mm)
SDWW-100-WR 703×611×1340
SDWW-160-SWR 703×611×1340
SDWW-260-SWR 703×611×1340
SDWW-320-SWR 703×611×1340
DW
Model
Dimension/D*W*
H(mm)
SDWW-500-S
1150X824X1204
SDWW-600-S
1150X824X1204
H

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INSTALLATION & INSTRUCTION MANUAL
70
46
Back View
Model: SDWW-100
SDWW-160-S
SDWW-260-S
SDWW-320-S
Model: SDWW-500-S
SDWW-600-S
Ground source
Ground source
Hot Water
Hot Water
Air Condition
Air Condition

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INSTALLATION & INSTRUCTION MANUAL
Air Con.water outlet
DN25 female
Air Con.water inlet
DN25 female
Ground source
outlet
Ground source inlet
For wire controller
For power cable
DN25 female
DN25 female
Specification of Water Connections
Model: SDWW-100
SDWW-160-S
SDWW-260-S
SDWW-320-S
Ground source
Ground source
Hot Water
Hot Water
Air Condition
Air Condition
Water Outlet
Water Inlet
Model: SDWW-500-S
SDWW-600-S

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5.Electrical Diagram
INSTALLATION & INSTRUCTION MANUAL
Model: SDWW-100
CD0643MB
CONTROLLER MODEL：
AD1AD2AD3AD4AD5
12V
GND
RD
TD
5687342
ON
1
DI1
B
A
TD
RD
GND
12V
DO11
220V/50HZ)
COMP.
MCU
M
KA2
KM1
*A2 *A1 *A1
*A2
L
N
FUSE
AC220V/5A
DO10DO9 DO7DO8 DO4DO3DO5DO6 DO1DO2
DI2 DI4 DI3 DI7 DI8 DI6 DI5 DI10 DI9 DI11 DI12
RS485
AD6AD7AD8
LED1LED2
JTPG
N N N
N L
COM
TB1
FUNCTION SET：
L
N
SIGN EXPLANATION：
KM
KA1
WIRE
CONTROLLER
MF
1/2
L
no
com
KA2
KA1-2
KA1
*A1 *A2
KM
A2
A1
no
com
MF
1/2
SR
C
*96
COM
FR1
*95
17
TB1
YLW
TB2
TB2
GROUND
SOURCE
PUMP
AIR
CONDITION
PUMP
RED BLU RED BLU
BLK
RED
WHI
BLU
COMP.1
4 way valve
ground source
pump
air condition
pump
BLU
BLU BLU BLU BLU
YLW
COMMON
TERMINAL
RED
BLU
DIP
double
system
single system
all heat
recovery
part heat recovery
electric heater
valid
electric heater
invalid
DHW valid
DHW invalid single
speed fan
commissioning
normal work
double
speed fan
YLW YLW YLW YLW YLW YLW YLW YLW YLW
3 PHASE PROTECTION
COMP. OVERLOAD
ELECTRIC HEATER OVERLOAD
LOW PRESSURE SWITCH
HIGH PRESSURE SWITCH
DHW FLOW SWITCH
GROUND SOURCE FLOW SWITCH
AIR CONDITION FLOW SWITCH
FAN INTERLOCK
FACTORY WIRE
USER WIRE
AIR CONSITION INLET WATER TEMP.
AIR CONSITION OUTLET WATER TEMP.
GROUND SOURCE INLET WATER TEMP.
GROUND SOURCE OUTLET WATER TEMP.
SIGN EXPLANATION SIGN EXPLANATION
CONTACTOR
TERMINAL
BOARD 1
RELAY
TERMINAL BOARD 2

INSTALLATION & INSTRUCTION MANUAL
Model: SDWW-160-S
SDWW-260-S
SDWW-320-S
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KM2
M
Ground
source
pump
Controller model：
Ground source inlet temp.
air con. inlet temp.
FR1
*22*2*4*6
KM1
*21*1*3*5
12V
GND
RD
TD
TVR
Common
terminal
B
A
TD
RD
GND
12V
phase protector
Comp. heat cable
contactor
heat relay
CCH
M
L1 L2 L3
COM ON
Explanation on signs:
Sign Explanation
KM1-4 FR1-2
TVR
CCH
fuse
FUSE
TB terminal block
KM2KM3
KM1
*A2 *A1 *A1
*A2 *A2
*A1
KM4
M
DHW pump
L
N
RS485
*2
*7
KT
*A2 *A1
*8 *6
KM4
N N N N N
L
N
L
12 3 4 5
COM 6 7 8
9
10 11 12
14 15
14
COM
*2*4*6 *1*3*5
*2*4*6 *1*3*5
*2*4*6 *1*3*5
Yellow
Green
Red
Blue
A
QF
QF breaker
Normal operation
mode
Debug mode
DHW disabled
heat pump
DHW enabled
Electric heater
Grade 1 enabled
Cooling only
DIP switch
Function setting:
KT time relay
KT
L1
L2 L3
N
21
Green
Brown
Blue
Red Brown Yellow
white
Yellow
Brown
Green
Yellow
Blue
Red
V
U W
Model Sign A(mm2)
Model table:
Wire diameter(see the model table)
A
Wire
controller
11 1312107 9863 54212 113118 10974 65321
DHW Inlet temp.
2 way valve
－A2
13Orange
fault output
Brown
Brown
Brown
Yellow
Orange
Green
Yellow
Red
Yellow
Red
Yellow
Pressure switch-Low
Pressure switch-High
DHW flow switch
air Con. flow switch
ground source flow
switch
indoor interlock switch
Sign Explanation
User wiring Factory wiring
Explanation: 1."*#" is the electric components number. Please do not mix with wire number.
2. Wire diameter not marked is 0.75 2.
KM3
Air Con.
Pump
M
4 way valve
Electric heater Grade 1 disabled
Electric heater Grade 2 enabled
Electric heater
Grade 2 disabled
air con. outlet temp.
Ground source outlet temp.
DHW outlet temp.
thermostati switch
Air Con. auxilary heater
overload
anti-freeze switch

INSTALLATION & INSTRUCTION MANUAL
Model: SDWW-500-S
KM4
Air Con.
pump
M
KM3
M
Ground
source
pump
CD0648AMB
Controller No.：
AD1AD2AD3AD4AD5
air con.inlet temp
FR1
*22*2 *4 *6
KM2
*21*1 *3 *5
12V
GND
RD
TD
5687342
ON
1
TVR
DI1
common terminal
BA
TD
RD
GND
12V
DO11
(380V/3N/50HZ)
phase protector
Comp.heater cable
contactor
heat relay
MCU
M
L1 L2 L3
P1 P2
explanation on signs:
sign explanation
KM1-5 FR1-2
TVR
CCH
fuse
FUSE
Factory wiring
explanationsign
TB terminal block
KM3 KM4KM1
*A2 *A1
(4A)
FUSE *A1
*A2 *A2
*A1
KM5
M
DHW pump
L
N
FUSE
AC220V/5A
DO10DO9 DO7DO8 DO4DO3DO5DO6 DO1DO2
DI2 DI4 DI3 DI7 DI8 DI6 DI5 DI10 DI9 DI11 DI12
RS485
AD6AD7AD8
LED1LED2
JTPG
*14
13
KT
*A2 *A1
9 5
KM5
N N N N N
L
N
L
1 2 3 4 5
COM 6 7 8
9
10 11
12
14 15
Explanation:
1,"*#"is the electric components number.
Please do not mix with wire number.
2,Wire diameter not marked is 0.752
COM
*2 *4 *6 *1 *3 *5
*2 *4 *6 *1 *3 *5
*2 *4 *6 *1 *3 *5
A 1.021.021.02
QF
QF breaker
Debug mode
heat pump
DHWenabl ed
El ect r i c heat er Gr ade1 enabl ed
5432
cool i ng onl y
1
OFF ON
DI P swi t ch
Funct i on Set t i ng：
KT time relay
KT
L1
L2 L3
N
r ed
br own
bl ue
r ed r ed
bl ack
yel l ow
bl ue
r ed
V
U W
Model Sign A(mm2)
Model table:
Wire diameter(see the model table)
A
wire
controller
11 1312107 9863 54212 113118 10974 65321
4 way valve 1
2 way valve
接KM5－A2
13
FR1
*22*2 *4 *6
KM1
*21*1 *3 *5
COMP.1
CCH
M
A
V
U W
*A2 *A1
N
KM2
16 17 r ed
r ed bl ack whi t e
CCH
N0
N
R S T
N
TB
r ed
r ed r ed
yel l ow
yel l ow yel l ow
yel l ow
yel l ow
yel l ow
yel l ow yel l ow
yel l ow yel l ow
r ed bl ack whi t e r ed bl ack whi t e r ed bl ack whi t e r ed bl ack whi t e
El ect r i c heat er Gr ade1 enabl ed
El ect r i c heat er Gr ade1 enabl ed
El ect r i c heat er Gr ade1 enabl ed DHWenabl ed Nor mal oper at i on
mode
COMP.2
air con.outlet temp
ground source inlet temp
ground source outlet temp
DHW inlet temp
DHW outlet temp
fault output
4 way valve 2
thermostati switch
air con.auxiliary
heater overload
anti-freeze switch
pressure switch-low 1
pressure switch-high 1
pressure switch-low 2
pressure switch-high 2
DHW flow switch
air con.flow switch
ground source flow
switch
indoor interlock switch
User wiring
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SDWW-600-S

Ⅱ. Installation
1. Transport and positioning
1.1 Transport
1.2 Positioning
The room where the heat pump is to be installed must meet the
following conditions:
No risk from frost.
Load-bearing floor.
Horizontal, level and solid floor as much as possible.
To protect the equipment against damage, it must be transported vertically inside
its dedicated packaging. Storage and transport at temperature below -20℃ and
in excess of +50℃ are not permissible.
The heat pump is designed for installation indoor, dry position.
(1). Remove the heat pump from its pallet and position it where required.
(2). Checking installation conditions:
For a quiet heat pump operation on floating screeds, isolate the screed and the
anti-vibration insulation from the surrounding of the installation location of the
heat pump.
The room must not be subject to a risk of explosions arising from dust, gases or
vapors.
The floor area of the installation room must be at least 3 square meters, and the
room must provide a volume of 6m3(minimum).
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.
The use of surface water or saline
water is not permitted.
Operation of a water-water heat
pump is not permitted with water
whose condition exceeds any of the
above limits(Up or down).
INSTALLATION & INSTRUCTION MANUAL
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2. Pipeline installation system notice
3. Installation of the heat source system
2.1. The water quality requirements: it should be noted the water quality problems,
furring and other impurity will have great impact to the normal operation of the
system. Therefore, the circulating water should go thought pre-filtration before inflow
to the system, and be soften. Please see”water requirements” chapter.
2.2. Please use pipe pincer to clamp the unit pipes, and then use another to fasten
the connection. Do not use a pipe pincer clamp to unit with fasten connection directly,
otherwise the pipes would damaged due to excessive torque, resulting in pipe crack
and leakage.
2.3. Circulation pump should be installed at the heat pump inlet. The expansion tank
should be installed at the entrance of circulation pump. Filters should be installed at
the circulation heat pump water inlet to avoid sundries blocking heat exchangers.
2.4. Water treatment to avoid damage to heat exchangers if the water quality is poor.
2.5.Air vent must be installed in the piping system to improve water system operating
efficiency.
2.6. Water flow switch must be set up in the water pipes, and be wired to the heat
pump controller system.
2.7. The water pipe construction and design must have anti-freeze, to prevent
damage to the heat pump. Ethylene glycol and propanol can be added in the water as
antifreeze.
2.8. In order to avoid the pipe to freeze when the het pump has a long downtime in
winter, the water should be discharged out from the piping system.
2.9. All pipes should be well insulated with thermal insulation, to reduce heat loss at
the most extent and keep high efficiency.
2.10. The inside of all water pipes must be cleaned before they are installed into the
water system.
2.11. The heat pump does not apply to open-water systems. Pollution of recycled
water would cause damage to the unit.
3.1. Required water quality
Frequent problems with the operation of ground source heat pumps are as follows:
(1). Erosion on the evaporator and the water feed pipes,
(2). Sludge deposits or blockage inside the evaporator and feed pipes.
(3). Blockage of the return well.
To prevent these problems, the quality of the water used as heat source water must
meet the following condition:
INSTALLATION & INSTRUCTION MANUAL
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(1). The water must not contain particles that cause sediment.
(2). The following limits regarding water scale must be maintained to prevent the
evaporator and the pipelines suffering from sludge deposits and blockage.
3.2. Never use surface water or saline water.
3.3. Circulation pump
Size the circulation pump of the heat source system in accordance with the system-
specific conditions, i.e. take the nominal flow rate and pressure drop (see
specification) , and heigh difference between the heat pump and the water tank into
consideration.
Connect the power wire and communication wire with control board correctly
according to the drawing diagram of control main board.
3.4. Water temperature
(1). The heat pump can work with water inlet temperature down to +7℃ in the well. If
such temperature is possible, for example after snow has melted, water of lower
temperature lower than 4℃ must not constantly be supplied to return wells.
(2). The closed underground loop can be as low as -5℃ with the heat pump. Please
add anti-freeze (glycol) according to the lowest water temperature, pressure drop
and corrosion condition.
3.5. Filter
Install the dirt filter in the well pipes to prevent the coming-up sand etc from blocking
the evaporator.
Install appropriate pre-filters and settlement basins if there is higher level of solid
particles transported in the well water. The evaporator can be flushed after removing
the connections fittings.
3.6. Connection
Connect the heat source circuit with flexible pressure hoses between heat pump and
water pipes, to prevent the transmission of noise.
3.7. Checking the flow rate
(Do it during heat pump commissioning)
Measure the flow volume and return temperature of the heat source. Determine the
temperature differential by measuring the temperature below the thermal insulation
on both flow and return pipes of the heat pump.
At temperature below 4℃ , the heat pump will enter anti-freeze mode.
Please check the heat source inlet temperature on the controller.
4. Installation of the heat consumer system
4.1 Install the heat consumer system(heating circuit) in accordance with current
technical guidelines and local regulations.
Prior to connect the heat pump, check the heating system for leakage, flush it
thoroughly, fill and carefully vent it.
Pay attention to the following when filling the system with heating water:
(1).During the service life of the system, the total of the fill and top-up water must not
exceed three times of the nominal volume of the heating system.
(2).The total alkaline earths in the water must be < 3.0 mol/m3.
(3). The total water hardness must be < 3 mmol/L,and
(4). Soften the water, if the above conditions can not be satisfied.
INSTALLATION & INSTRUCTION MANUAL

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Generally soften the heating water, if the specific system volume > 20L/KW output
(e.g. system with buffer tank).
Check the correct connection of heating flow. 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 on heating systems.
4.2. Buffer tank
A buffer tank is recommended to ensure stable heat pump operation. The buffer tank
provides hydraulic separation of the volume flow in the heat pump circuit and the
heating circuit.
4.3. Circulation pump
Size the circulation pump on the heating side taking the condenser pressure drop
and the pipeline pressure drop into consideration. Make sure the nominal flow rate of
the heat pump under all operating conditions of the heating system by installing an
overflow valve.
4.4. Heat meter
Observe the additional pressure drop when installing heat meters on the heating
side. The sieve inside the heat meters are easily blocked by dirt particles in the
heating circuit, further increasing the pressure drop.
4.5. Oxygen diffusion
Steel components, such as radiators and pipes, can corrode if plastic under floor
heating system pipes, which are permeable to oxygen, are used.
The product of corrosion, i.e. rusty sludge, can settle inside the heat pump
evaporator and can lead to output loss through a reduction of cross-section or in a
heat pump shutdown triggered by the high pressure limiter.
So, we advise to avoid open heating system or the installation of steel pipes
conjunction with plastic pipes in underfloor heating systems, which are permeable to
oxygen.
4.6 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 local
regulations.
5. Electrical Connection
5.1 The power for the heat pump should be independent. Do not share with other
electrical power.
5.2. The ground line of the power must be connected correctly to prevent creepage
accident.
5.3. Shunt wire and main wire: the safe current of the smallest diameter of shunt wire
is 1.5 times as much as the heat pump running current. The safe current of the
smallest diameter of main wire is 1.5 times as much as heat pump running current.
INSTALLATION & INSTRUCTION MANUAL

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5.4. Running power:
1).allow voltage range: rated voltage ± 10%.
2).allow the frequency range: rated frequency ± 2%.
3).allow the three-phase unbalance voltage: ± 2.25%.
4).allow the three-phase unbalance current: ± 5%.
5.5. The electrical wire of power to unit should be laid in accordance with
construction regulations and standards, and have good insulation.
5.6.Electrical parameters on unit nameplate as the standard operation parameters,
selection of power, transformers, magnetic contactor, non-fuse switches, wiring
should consider the worst working conditions. Wiring in strict accordance with the
documents and notes of unit.
6. Commissioning
6.1.Check unit power supply ground lead.
6.2.Check the air condition circulatory system and ground-source side circulatory
system is filled with water, pipeline exclude air, and the water valve is in the open
position.
6.3.Check the pipeline valve is placed in the correct position.
6.4.Check the power supply voltage is correct.
6.5. Water pump and pipe commissioning：change the jump 5 of main control board
of “FUNCTION SETTING” into ON, and press the key of “ON/OFF” on controller, you
can start to debug water pump and pipe system. Check if the rotation direction of
water pump is right, if the water flow switch work right, and exhaust all air from pipe.
6.6. Running commissioning: change the jump 5 of “FUNCTION SETTING” into OFF,
and press the key of “ON/OFF” on controller to start the heat pump, and record the
temperature of ground water inlet/outlet and temperature of heating water
inlet/outlet, and confirm if they meets the requirement. Normal difference between
Brine inlet and Brine outlet is 3-7 degree, normal difference between heating inlet
and heating outlet is also around 3-7 degree.
6.7.Soft starter
The soft boot relay in single-phase heat pump can reduce the starting current, about
0.5 times, in order to reduce the impact of the power grid, avoiding start from
excessive current worry .
6.8.Attention!
(1)Frequently boot compressor will have an impact on the life of the compressor, the
compressor can be stopped after running 90 seconds, restart more than 180
seconds!
(2)Strong advice: Do not start and stop frequently. Do not cut unit power directly!
(3).Don’t cut off the power when the system is taken out of use. This retains the
safety functions designed to protect the system (e.g. anti-freezed protection)
(4).Drain the water side of the equipment, if the heat pump is taken out of use at a
location subject to a risk of frost.
INSTALLATION & INSTRUCTION MANUAL

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7. Cleaning
(1). Evaporator
In case well water sediment settles inside the evaporator, where it can form a
sludge, clean the evaporator by flushing it via its connectors (heat source inlet and
outlet).
(2). Condenser
In case of heat pump faults (e.g. high pressure limiter trips) through deposits of
corrosion products (rust sludge) inside the condenser, only dissolving them by
means of solvents used by our customer service will remove this problem.
(3). Dirt filter
After heat pump runs for 24 hours, the filter of water pump inlet must be clean；
Clean the dirt filter regularly, subject to the level of contamination of the well water.
Where heat meters are installed, frequently clean their sieves, which block easily.
8.Water quality standards
Unit fault caused by poor water quality can be broadly divided into: Corrosion
(condenser pipe broke down), scale (high-voltage accidents), and algae mud
(micro-organisms). Unit fault is serious particularly caused by poor ground water
quality, so no using groundwater absolutely. The problem of poor water quality listed
as follows:
8.1.Corrosion: Corrosion of metal will cause water leakage. If corrosion occurs in
the internal condenser, then cooling pipe will be cankered, The cooling pipes, even
the entire condenser need to be replaced. Besides, corrosion would lead to system
high pressure protection. Corrosion may be caused by several reasons.
A. Poor water quality can canker metal, the standard of water quality shown in the
table below.
B. Even if the water quality is good, it would will also canker metal once corrosion
happen.
C. The faster the flow rate, the sooner the metal corrosion, so cooling water must
follow the standard.
D. If the sand or dust entered into the cooling pipe, which accumulated will
accelerate corrosion.
E. Algal mud will also accelerate corrosion.
8.2.Scale: The scale on the inner surface which in the cooling pipe, not only
impede heat conduction directly, but also reduced the cooling water, high-pressure
switch stop finally. In addition, the scale will make condenser and cooling pipe
cankered, even pinhole. Scale may be caused by following reasons:
A. cooling water containing CaCO , SiO , Fe and other elements, after the cooling
3 2
water circulate a long time, the water evaporate, the concentration gradually
increased, exceeded solubility, elements deposit on the wall.
B. corrosion products remain in the tube.
C. algae mud flow into the tube by water.
D. sand and dust mix in the tube.
8.3.Algal mud: algae mud formed under the following conditions, food, proper
temperature, oxygen and sunlight (sunlight sometimes do not need), when the
cooling tower have suitable conditions for the formation of these microorganisms,
pipeline will be blocked or cankered quickly.
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Circulating cooling water treatment mainly to resolve the water scale, corrosion,
fouling and microbiological. Specifically, control of corrosion rate is less than 0.125
2
(mm / a); year dirt coefficient 0.00017 ~ 0.00052m • K / W, the anaerobic bacteria
3
per milliliter of water is less than 10 . In order to achieve the above requirements, it is
necessary to add appropriate scale inhibitors to prevent scaling, add corrosion
inhibitor to prevent corrosion, add peeling biocide to eliminate microorganisms.
However, the situation is not very simple, because the impact are many factors, such
as added water quality, recycled water concentration multiple, recycling water
quality, flow rate, structure and materials of heat exchanger, process fluid leakage
and water temperature, every factory is different. Therefore, the circulating cooling
water treatment prescription is not the same.
2 +
First, to control the content of Ca , decrease it to make the water soften. The
following four methods for users to have a reference:
1. Ion exchange resin method
2. Scale Inhibitor
3. Corrosion inhibitor
4. Biocide
8.4.Water quality standards
Direction
Item (ppm)Cooling
water
standard
(1)
corrosion scale
6.0~8.0 6.0~8.0 ○ ○
○
cl-○
SO4
-- ○
○ ○
Alkali
CaCO
3
○
Basic
factor
Full
hardness
○
S-- ○
NH4
+○
Proposed
factor (3)
SiO2○
Feed
water
standard
PH(25 )℃
conductivity ppm <200
<200
<200
<100
<500(4)
<50
<50
<0.3 <1.0(2)
<0.1
<50
<30 <30
<200
ppm
ppm
ppm
ppm
ppm
ppm
ppm
ppm
Unknown
Unknown
Unknown
Unknown
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Note:
(1) Cooling water means water through the condenser, whether through one or
cycle.
(2) Use of plastic pipe, the value is less than 0.5ppm.
(3) Proposed factor, although knowing that a great impact on water quality, but no
real evidence,
it adopted the "Proposal".
(4) Use of anti-rust, the value allowed to 1,000 ppm.
(5) When the water quality does not comply with the above table, it is necessary to
add water treatment equipment, to ensure that unit can operate normally.
According to relevant information: water PH <6.5, hardness of <50mg / L, have a
corrosive effect on copper; carbon dioxide> 50mg / L, high solubility and hardness of
groundwater will canker copper. Therefore, recommends that customers should pay
attention to water quality standards
9. Using monoethylene glycol
Correction
factor
0 .60
0 .70
0 . 80
0 . 90
1.00
1.2 0
1.30
1.40
1.1 0
1.50
10 2 0 30 40
Conten t of monoethy le ne gly co l %
（ ）
Pressur e drop c ur ve
Wa t er fl ow c urve
Cooling curve
Mass
concentration
Solidification
temperature
Mass
concentration
Solidification
temperature
Mass
concentration
Solidification
temperature
4.6 -2 -10
-13
-15
-17
35
38.8
42.6
46.4
-21
-26
-29
-33
-4
-5
-7
19.8
23.6
27.4
31.2
8.4
12.2
16
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Ⅲ. Operation of controller
2.Operation
1. Button AUTO reset function
In setting or enquiry stage, 90 seconds after without button operation, the
controller quits setting/enquiry and reset to normal display stage. All data
would not be carried out.
2. start and shut off
(1). when stop, press “ON/OFF” to start the heat pump;
(2). when running, press “ON/OFF” to shut off the heat pump;
(3). no display of temperature and mode on controller when stop;
(4). when running, the controller displays the current temperature of cooling water
3. Memory for power cut-off
All parameter would be automatically saved without affect by power cut-off. The
heat pump can be set as off, or as reset by to previous working stage after power on
again.
4. Mode and temperature setting
(1). Heating
Press “ MODE”, set the mode to “HEATING”(the heating light will be on), and
press “ △ ” or “▽ ” to set the temperature of heating flow, appropriate
temperature of heating flow is 35~45℃.
(2). Cooling
Press “MODE”, set the mode to “COOLING”(the cooling light will be on), and
press “△” or “▽” to set the temperature of heating flow, appropriate temperature
of cooling flow water is 7~25℃.
1. User Interface
INSTALLATION & INSTRUCTION MANUAL