Haier CA0065EANR User manual

1
Service Manual
INVERTER MODULAR CHILLER
SYJS-11-2018 REVA Edition: 2018-11

1
CONTENTS
1. Nomenclature ........................................................................................................................................................ 1
2. Feature .................................................................................................................................................................. 1
2.1 Product feature.................................................................................................................................................... 1
2.2 High Efciency..................................................................................................................................................... 2
2.3 Easy Installation .................................................................................................................................................. 2
2.4 Comfort................................................................................................................................................................ 4
2.5 High Reliability..................................................................................................................................................... 5
3. Specication .......................................................................................................................................................... 7
4. Dimension.............................................................................................................................................................. 9
5. Refrigerant system diagram ................................................................................................................................ 10
6. Installation ........................................................................................................................................................... 11
6.1 Symbol precautions........................................................................................................................................... 11
6.2 Installation ......................................................................................................................................................... 13
6.3 Water pipe connection....................................................................................................................................... 16
6.4 Electrical Connection Precautions..................................................................................................................... 21
6.5 Debugging and running ..................................................................................................................................... 26
6.6 Regular inspection of the project....................................................................................................................... 27
6.7 Maintenance...................................................................................................................................................... 28
7. Controller Operation Instruction........................................................................................................................... 29
8. Wiring diagram .................................................................................................................................................... 40
9. PCB photo and address code setting.................................................................................................................. 41
10. Fault code.......................................................................................................................................................... 42
11. Trouble shooting ................................................................................................................................................ 44
12. Unit operating range and service condition ....................................................................................................... 46
12.1 Unit operating range........................................................................................................................................ 46
12.2 Unit operating conditions................................................................................................................................. 46
13. Technical parameters ........................................................................................................................................ 47
14. Sensor charistic................................................................................................................................................. 48
15. Appendixi table for manual updated information ............................................................................................... 49

1
1. Nomenclature
2. Feature
2.1 Product feature
Code Explanation for chiller
1 2 3 4 5 6 7 8 9 10
Chiller
system Compressor type
Capacity
(for
Centrifugal
chiller: Rt;
other: kW)
Product type Unit
character
Suitable
voltage Design number
C
Centrifugal chiller C 1 0 6 9
Heat
pump
R22 A Air
cooled A100-115V, 60Hz 1Fixed frequency A-G
Screw
chiller
Air
cooled
I
0 2 3 7 R407C B Water
cooled W220-240V, 50Hz 2Inverter H-Q
Water
cooled 0 0 1 2 R132 C Earth source
E
115-220V,
50/60Hz 3DC inverter R-Z
Earth
source R134A D 220-220V, 60Hz 4
Air-cooled
module chiller A R410A E 110V, 50- 60Hz 5
Light
chiller
Split-
packaged H
Cooling
only
R22 M 220V, 50-
60Hz 6
Single-
packaged R R407C N 127V, 60Hz 7
Water-cooled cabinet
chiller W R132 O 240V, 50Hz 8
Hydronic
system
Cassatte B R134A P 110-220V,
50/60Hz 9
Duct D R410A Q 330V, 50Hz A
Cabinet P 400V, 50Hz B
Wall
mounted S3300V, 50Hz C
6600V, 50Hz D
380-400V,
50Hz N
415V, 50Hz M
‘Y’ shape appearance
‘Y’ shape design is more fasion and increases the heat exchanger area.

2
2.2 High Efciency
2.3 Easy Installation
EC Fans
Driver Module
Condenser Coils
DC Inverter Rotary
1Compressor Motor
The unit adopts full DC inverter rotary
compressor, driven by high-efciency
permanent magnet DC motor to improve
the energy efciency greatly. The high-
efciency oil supply and oil separation
parts ensure the low friction, low noise,
stable and reliable operation of the
compressor.
Low sound power level EC fans,
together with high efciency DC inverter
motor,greatly reducing the power
consumption. Special 0-91Hz stepless
variable frequency speed regulation
ensures the stable and reliable operation
of the unit.
2
High efcient parts and unique design ensure the chiller high efciency COP up to 3.0.
Compact design, small footprint
‘Y’ shape design , small oor area, only 1.56m2,
28% footprint can be reduced.
Modular design, exible combination
The unit adopts modular design, and max.16 modules can be combined in each group, which can meet the load
demand of different buildings. The combination can be "full inverter units solution" or “inverter units and fixed
speed units solution”.
Full inverter units solution
【Inverter unit(main module)+N×inverter units(auxiliary modules)】
Inverter units and xed speed units solution
【Inverter unit(main module)+N×xed speed units(auxiliary modules)】
2185mm
1000mm 780mm
2000mm
area reduced
2.18m21.56m2

3
Modbus function
Standard ow switch
DC Inverter Rotary DC Inverter Rotary
Standard ow switch in the product, installer no need
to purchase ow switch.
MODBUS interface is reserved for units, which can be connected to building automation systems for centralized
control, easy to realize intelligent management and remote control.
485-232/485-USB Converter
Modbus

4
Precise temperature control
EXV adopts PID control, accurate control refrigerant distribution, outlet water temp. ±5% of the set temperature .
Quick start
With new inverter technology, quick start within 5s, maintain ultra high frequency operation within 1 hour to ensure
the room temperature can reach the set temperature as soon as possible.
2.4 Comfort
Temp.
Operation time
Start Cooling mode
Indoor
temp.
PID controlNormal control
Inverter
unit, Small
temperature
drop
Hot
Cold
±0.5℃
Comfort
Inverter
unit,Quick
cooling
Maximum capacity of hyper cooling and heating
Maximum capacity of normal cooling and heating
5sec
INVERTER

5
Quick start within 5s
Maintain ultra high frequency
operation within 1 hour
Quick start, hyper
cooling and heating
The system will record the operating state before
the power cut. When the power supply is restored,
the system will automatically return to the state
before the power cut without setting again.
Power cut memory function
Shell & tube heat exchanger
The new modular chiller adopts shell & tube heat
exchanger(65/100/130kW) avoid dirty plugging,
higher efciency and reliability.
2.5 High Reliability
Filter drier
Filter drier,absorb moisture in the system, avoid the
emergence of the "ice block"
Pressure sensor control
Through the pressure sensor real-time
monitoring, realize the system quickly, accurately
control, ensure the unit efcient and stable
operation
Three phase fan motor
Three phase fan motor,compared with one
phase fan motor low starting current, high
speed and more stable.

6
Backup operation function
The system has three modules, the actual operation of just two module, if one module malfunction another module
will start automatically according to the water temperature.
operation stop
operation malfunction stop
service
operation

7
3. Specication
Model CA0065EANR
Cooling(T1)
Cooling capacity kW 60
Power input kW 20
Running current A 38
Cooling(T3)
Cooling capacity kW 46
Power input kW 20.5
Running current A 38
Heating
Heating capacity kW 65
Power input kW 19.4
Running current A 36.8
COPR(T1) 3.00
COPR(T3) 2.24
COPH3.35
COPH
*3.85
Max.Power input kW 31.6
Max. running current A 60
Power supply 3N~/380V/50Hz/60Hz
Refrigerant throttle type Electronic expansion valve
Capacity control Stepless
Safety & functional protections
High/low Pressure Protection,Water Lackage
delay Protection, Freeze Protection,Overload
& Overheat Protection, Phase Loss, Phase
Sequence Protection
Compressor
Type Rotary
Quantity 2
Input power KW 9.5×2
Refrigerant
Type - R410a
Charge kg 6×2
Air side heat
exchanger
Type
(Slit n & efcient inner grooved copper tube)
Inner grooved copper pipe & hydrophilic
aluminum n coil
Fan power KW 0.8×2
Fan type Axial ow fan
Fan quantity 2

8
Note: 1.Specications are based on the following conditions:
• (T1) Cooling: chilled water inlet/outlet: 12°C/7°C, and outdoor ambient temp. 35°CDB;
• (T3) Cooling: chilled water inlet/outlet: 12°C7°C, and outdoor ambient temp. 46°CDB;
• Heating COPH : warm water inlet/outlet: 40°C/45°C, and outdoor ambient temp. 7°CDB/6°CWB;
• Heating COPH
*: warm water inlet/outlet: 30°C/35°C
• Water side fouling factor: 0.018m2•°C/kW;
• 1m away in open eld(sound pressure).
2.Due to our policy of innovation, some specications may be changed without notication.
Model CA0065EANR
Water side heat
exchanger
Type Shell and tube heat exchanger
Rated water ow m³/h 10.32
Inlet/outlet pipe R2''
Water dirt coefcient m2.°C/KW 0.018
Standard pressure Mpa 1.0
Water resistance kPa 45
Sound pressure level dB(A) 65
External dimension
Unit length mm 2060
Unit width mm 780
Unit height mm 2170
Package dimension
Unit length mm 2200
Unit width mm 830
Unit height mm 2270
Weight
Unit weight kg 700
Gross weight kg 715
Operation weight kg 750

9
4. Dimension
Unit Base Diagram
Water Outlet
Water Inlet
Draining Valve
Electric control cabinet
0001
527
1320
2170
Reference Position of Base
1.The foundation load is designed according to the weight of the unit during operation.
2.The foundation can be channel steel (designed by the user according to the unit size) or
concrete structure. The surface should be level to ensure the smooth ow of the unit.
3.Add 10~20mm rubber cushion between the unit and the foundation.
4.The unit and foundation can be xed with Φ16 or Φ18 foot bolts.

10
5. Refrigerant system diagram
4WVA
●
1
Dry evaporator
V-type heat exchanger
INV
D
E
C
S
Gas liquid separtator
Electronic expansion valve
T
Oil
T
d A
T
e A1
T
e A2
T
ewo
T
ewi
T
s A
SV1
LPs
A
HPs
A
Capillary
Oil separator
T
e A1
T
e A2
Accumulator
Gas liquid separtator
Accumulator
B
INV
Electronic expansion
valve 4WVA1
Oil separator
Capillary
T
●
Oil
T
s
B
LPs
B
D
C
S E
SV1
HPs
B
T
d
B

11
6. Installation
6.1 Symbol precautions
Symbol description
Dear user,
For the better understanding of this Manual and the proper operation of the chiller, the marks and symbols used in
this Manual are described as follows:
It is likely to cause death, serious injury and other severe accidents if the user fails
to do as required.
It is possible for severe accident to occur.
WARNING
WARNING
CAUTION
■Installation and maintenance must be carried out by professionals experienced in this type of unit in accordance
with applicable local codes and rules on installation and maintenance. We are not liable for any unit damage or
casualty due to non-conformance with this requirement.
■The power supply must be switched off prior to maintenance and relocation of the unit; otherwise, personal
injury or death may be caused by electric shock. Do not touch such hot components as compressor and exhaust
pipe directly.
■When the water system contains water, control the startup and shutdown of the water pump via the water pump
output point on the unit controller; otherwise, the anti-freezing protection of the unit will not work, causing the
freezing crack to the heat exchanger. If the unit is to idle for a long time in winter, drain the water from the water
system via the drain valve to prevent the freezing crack of the heat exchanger, the water pipe and other parts on
water side. Furthermore, the water pump shall be power off to avoid starting up against frost without water.
■To prevent the heat exchanger on water side from being frozen due to foreign matters entered, a self-contained
water lter must be installed on the water return pipe of the unit (specic installation position is shown in water
system diagram).
■Dregs and dirt in the water pipe network including lter and heat exchanger may seriously damage the heat
exchanger and water pipe. Installers and users must ensure the quality of chilled water, not use anti-icing
mixtures containing salt and prevent the entry of air into the water system, because the salt and air can oxidize
and corrode steel parts inside the heat exchanger.
■When the unit is installed, it must be protected against wind and earthquakes as required. Otherwise, accidents
such as dumping or falling of the unit may occur.
■The xed foundation must have sufcient bearing capacity when the unit is installed. The base of the unit must
be xed on a solid foundation to prevent the unit from sinking or causing injury due to insufcient strength.
■Before repairing and transferring the machine, the power must be cut off, otherwise the electric shock will cause
injury and death. Do not directly touch high temperature components such as compressors and exhaust pipes.
■The installer and the user must ensure the quality of the chilled water. It is forbidden to use the salt anti-icing
mixture and no air is allowed to enter the water system.
■The unit is forbidden to be installed in places such as toilet exhaust, hospital operating room exhaust, sewer
treatment equipment, etc., where there is much dirt, oil, salt, and a large amount of sulfurized gas, which will
cause corrosion of the unit components.
■It is forbidden to use refrigerant or refrigerant oil other than those specied by the model. Failure to do so may
result in damage to the unit, resulting in a re or explosion.
■The installation location of the equipment should ensure that the drainage system is unblocked. Improper
drainage systems may cause poor drainage and cause equipment to get wet.
■The unit must be warmed up for two hours for the rst time. This is to protect the compressor. If the preheating
time is not met, the unit may report the oil preheating and the temperature barrier.
■The unit must be properly grounded. The grounding wire cannot be connected to the air pipe, water pipe,
lightning protection device, telephone line, and the wrong grounding method can cause a click accident.
■Do not touch the high temperature part of the compressor and refrigerant piping. Beware of burns.
■Prevent refrigerant leakage. Especially when the unit is installed indoors, there must be reliable measures to
prevent refrigerant leakage. In the event of a refrigerant leak, open the window in time to ventilate.
■The power must be turned off before repairing and moving the machine, otherwise the electric shock will cause
personal injury and death. Do not directly touch high temperature components such as compressors and exhaust
pipes.

12
CAUTION
■No unit is allowed to be installed near such places that are dirty, oily, salty, exposed to a large amount of sulfur
gas and where the unit parts may be subjected to corrosion, such as toilet vent, operation room vent and
sewage treatment equipment.
■If the unit is operated below 0°C, it must be installed at a place at least 300 mm above the ground, so as to
avoid icing of unit base plate and to ensure the normal operation of the unit even though the snow reaches this
height; in addition, the unit shall be placed on a plane (with maximum deviation per meter of not more than 2 mm).
■It is forbidden to change the setting value of the safety protection device. Failure to do so may result in re,
explosion, etc.
■If the wire harness wiring sequence is connected incorrectly, component and controller damage will occur.
Please check the cable sequence before powering on to avoid controller damage.
■The unit must be warmed up for two hours for the rst time. This is to protect the compressor. If the preheating
time is not met, the unit may report the oil preheating and the temperature barrier.
■If the unit is running below 0 °C, it must be installed at least 300mm above the ground. This is to avoid the unit
chassis freezing, and to avoid the normal operation of the unit due to the thickness of the snow reaching this
height. It should be installed on a at surface (maximum deviation should not exceed 2mm per meter).
■Prepare protective equipment and installation tools. Protective equipment, including gloves, work clothes, etc.,
can prevent accidental personal injury.
■It is forbidden to use fuses that exceed normal capacity. Replacing a fuse with a wire or the like will be a safety
hazard or cause a re.
■It is forbidden to short-circuit the safety device and force the unit to start. This can result in damage to the unit,
re, explosions, etc.
■It is forbidden to use other uses beyond the scope of its unit design. This machine is not suitable for storing
food, animals, plants, art, etc., otherwise the quality of these items will be degraded.
■Before the unit is repaired and maintained, the unit must be stopped and the power supply must be cut off.
Otherwise, there will be consequences such as electric shock and accidental injury.
■When the unit is deactivated for a long time, the residual water inside the unit must be exhausted. If the unit is
out of service for a long time, the water pipe should be lled with preservatives or the remaining water in the pipe
should be removed. Otherwise, the unit components may be cracked and leaked.
■Do not place or hang any objects above the unit. Accidental injury can occur when an object is dumped or
dropped.
■It is forbidden to operate the unit with wet hands. Otherwise it will cause an electric shock.
■Do not touch the unit fan and other moving parts. Failure to do so may result in accidental injury.
■If the unit is running abnormally, you must cut off the power immediately and get in touch with the dealer
■Electrical installation must have dedicated lines and be installed by professional electricians. The electrical part
must be protected from moisture, otherwise it will cause electric shock, re and other accidents.
■The leakage protector must be set correctly. Leakage circuit breakers must be installed in accordance with
electrical codes, and incorrect installation may result in electric shock.
■The power cord should not be pulled too tightly. Doing so can break the cable and generate heat, which can
lead to re or other accidents.
■Do not touch sharp edges and heat exchanger fins. Sharp edges and heat exchanger fins are harmful and
should be avoided.
■It is forbidden to install the unit where it may leak ammable gases. If ammable gas leaks and accumulates
around the unit, explosions, res, etc. may occur.
■If the unit is installed in a hospital, telecommunications station or the like, take appropriate protective measures.
Inverters, self-contained generators, high-frequency medical equipment, and radio communication equipment may
cause the air conditioner to work abnormally or not.
■Be careful when handling the product. If the weight of the product exceeds 20KG, it cannot be handled by one
person. It should be assisted by special equipment.
■It is forbidden to directly control the operation and stop of the unit with the power switch and the electric gate.
Such erroneous operations can cause clicks or res.
Precautions for using R410A refrigerant
The system must be lled with liquid refrigerant. If a gaseous refrigerant is used to ll the system, the refrigerant
composition in the system will change and the performance of the unit may decrease.

13
Selection Installation Position
■For the better cooling (heating), the installation position of the chiller unit shall be selected as per the followings:
■The unit shall be installed at a place where the hot air exhausted by the unit is not sucked back, that exhausted
by other unit is not sucked and sufcient space is reserved for the unit maintenance.
■Exhaust and suction channels of the chiller unit shall be free of any barrier that will block the air ow.
■The unit is installed at a well ventilated place to improve the heat exchange.
■The installation position shall have enough strength to withstand the unit weight and the vibration
during operation.
■The unit shall not be installed at a place that is dirty, oily, salty and exposed to a large amount of sulfur gas.
■The chiller unit shall not be installed at such place where ammable gas may leak. Because the ammable gas
leaked and accumulated around the unit may lead to explosion.
■The chiller unit shall not be installed at such a place exposed to strong wind or typhoon or accumulated
rainwater and snow. If possible, auxiliary equipment for preventing rainwater, snow and direct sunshine may be
provided.
■The unit base shall be made of concrete or support. Full consideration must be given to oor strength, drainage
(water is drained from the unit during operation) and pipe and wire route in the base construction. If the base is
not strong enough, the unit may fall down, causing unit damage or personal injury.
■The chiller unit shall be rmly fastened with anchor bolts to prevent falling down due to earthquake or strong
wind In order to withstand strong wind and earthquake, the unit must be positioned properly and can not be
installed at such a place exposed to strong wind.
■Depending on installation conditions, vibration may be transferred to tted parts, and base plates and walls may
produce vibration and noise. Therefore, proper vibration protections
(e.g. setting shock pad, dumper bracket, etc.) shall be provided.
■Edges and corners must be positioned correctly. The improper installation may lead to instability, resulting in
bending of mounting feet. Any improper installation may cause the falling down of the unit, leading to
personal injury.
■Pre-installation Preparation
■Cargo inspection
All units are rmly bolted on wood trays, subject to ex-factory inspection and lled with accurate amount of
R410a refrigerant and refrigeration oil for the unit operation. Upon the receipt, you shall carefully inspect cargoes
for any damage during transport and conrm all ordered parts and accessories are delivered.
You shall inform delivery man of any damage immediately. And you shall inform problem to us other than
appearance damage immediately.
■Handling
You shall handle the unit by a forklift or crane. If a crane
is used, the top and side panel of the unit shall be protected
by appropriate spacers (as shown in the gure). During the
handling, the unit shall be kept horizontal and not be inclined
for more than 30°, and the unit damage due to violations shall
be avoided.
■Disassembly
Place the unit at a desired position, cut binding tapes, remove
the external crate, unscrew bolts and remove the wood base
from the unit bottom.
Spacer
Spacer
<30°, Lifting rope
(two pieces)
6.2 Installation

14
1. Diagram of installation space for single chiller unit (Unit:mm)
Installation Space
>48°
>300
>1000
Guiding device
2. Diagram of installation space for multiple chiller units (Unit:mm)
>450
>450
>450
>450
>450
>1500
>1500

15
3. Diagram of arrangement of multiple chiller units (Unit:mm)
Cut-off height of
top ventilation
>3000
Space between
units and wall>450
Space between
units and
wall>1000
Space
between
units >450
Space
between
units >450
Space
between
units >450
Space
between
units >900
Space
between
units >900
Space
between
units >900
Unit
height

16
6.3 Water pipe connection
■Water Pipe Connection
1. External water pipe system must be equipped with exible joints, water lter, electronic cleaner, check valve,
drain valve, exhaust valve, shutoff valve, expansion tank, etc.. The expansion tank shall be located at 1-1.5 m
above the highest point of the system; the exhaust valve shall be set between the highest point of the system
and the expansion tank, and insulations shall be arranged between the tank and the pipe.
2. Water supply system must be a water pump with appropriate ow and head to ensure the normal water supply
to the unit. The circulating water must be softened water.
3. A water lter must be installed in front of the inlet pipe of the unit, and the self-contained water lter also must
be installed.
4. The connection between the water pump and the unit and between the water pump and the water pipe shall be
realized through exible joints; in addition, the pipe and the water pump shall be supported separately, so as to
not apply any force on the unit.
5. Flushing and heating of water pipe shall be carried out prior to the connection between the pipe and the unit.
6. The drain valve on the outlet pipe is self-contained; manual or automatic exhaust valve shall be set at the
highest point of the water circulation system; for the normal operation of the unit, the valve handle must be
removed, so that the valve is not adjusted.
7. Water quality control
Industrial water used as hot water is not likely to produce scale; while, well water or river water may produce
a lot of scale, sand and other sediments. So, before owing into the hot water system, the water must be
ltrated and softened by water softening equipment. If sand or mud deposits in evaporator, the ow of hot
water will be blocked, resulting in freezing; so relevant water values such as PH, electric conductivity, chloride
ion concentration, sulfur ion concentration shall be analyzed beforehand. Quality criteria of the water for the unit
are shown as follows:
Item Criteria Impact factor
Standard
PH 7.5-9.0 ○/□
Electric conductivity ≤200 uv/ppm (25°) ○/□
Chloride ion ≤50 ppm □
Sulfate ion ≤50 ppm □
Total iron content ≤0.3 ppm □
Alkali ion ≤50 ppm □
Total hardness ≤50 ppm □
Reference
Sulfur ion N/A □
Ammonia ion N/A □
Silicon ≤30 ppm ○
Note: ○ Standing for scale, □ standing for corrosion

17
WARNING
Never connect unclean pipe to the unit!
■If the unit is to idle for a long time, the water in the water system shall be drained to prevent the plate heat
exchanger being iced.
■If the unit is to idle for a short time, the power-off is not allowed, because the unit has automatic anti-freezing
function. When the temperature in the outlet pipe is very low, the unit will automatically operate for a period to
maintain the temperature of the water system and prevent the water pipe from being frozen, so the unit must be
energized in winter. If the unit is not used in winter, drain the water from the water system or ll such
anti-freezing mixture as ethylene glycol and glycerol into the water system.
■The water lter must be installed correctly; otherwise, the unit may be damaged. Additionally, the water lter
shall be regularly inspected for any blockage due to dirt.
■Schematic diagram of water system
■Multi-unit module combined water system installation schematic
Symbol Description
Check valve
Automatic exhaust valve
Water filter
Stop valve
Thermometer
Pressure gauge
Water pump
Flexible connection
Expansion tank
Electronic water processor
3-way valve
2-way valve
Symbol Description
Fan coil
Fan coil
Fan coil
an coil
Heater

18
■Overall Nozzle Dimensions during Module Combination (Maximum 16 modules combined)
Basic requirements
The chilled water pipelines may be connected as per relevant procedure when the unit is installed in place. Such
pipelines shall be free from any foreign matter, and must conform to local piping regulations and rules.
1. Before unit operation, thoroughly ush all chilled water pipelines to ensure that they are free from any foreign
matter. Note: Do not ush any foreign matter into the evaporator.
2. Water must ow into the heat exchanger via the inlet. The opposite water direction through he heat exchanger
may degrade the unit performance, and give rise to fault in ow switch.
3. The water pump installed in the water pipeline system is equipped with a starter, and directly pumps water
into the heat exchanger of the water system.
4. Tubing and connectors must not be mounted on the unit but independently supported.
5. The nozzles and connectors of the heat exchanger shall be easily disassembled for operation, cleaning and
inspection over the evaporator nozzle.
6. The evaporator is provided with a 40-mesh lter, which must be installed at the water inlet of the unit and
insulated (see the above diagram).
7. The heat exchanger ports and the site pipelines shall be exibly connected to reduce vibration transmitted to
buildings.
8. To facilitate troubleshooting, a thermometer or pressure gauge shall be installed on the water inlet and outlet
pipelines. Pressure or temperature instrument are not provided with the unit and are at users’ own expenses.
9. Drain ports shall be arranged at all low points of the water system to ensure that water in the evaporator
and the system is completely discharged; exhaust valves shall be arranged at all high points to vent air in the
pipelines. The exhaust valves and drain ports are not insulated for easy troubleshooting.
10. All water pipelines in the system exposed to frost shall be thermally insulated.
11. Outdoor chilled water pipelines shall be covered with an auxiliary heating tape and insulated with 20 mm thick
thermal insulation material, so as to avoid frozen or ruptured pipelines due to low temperature. The power supply
of the heating tape shall be equipped with a separate fuse.
12. Where the ambient temperature is below 0°C, or the unit is to idle for a long time, please discharge water
from the unit through the water outlet pipeline connected with the plate heat exchanger of the unit. If no water
discharge is required for the unit in winter, do not cut off the power supply. The fan coil in the water system must
be provided with a 3-way valve to ensure that the water system is smoothly circulated after the winterizing water
pump is started.
Number of modules 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Overall nozzle
dimensions (mm) 65 80 100 125 150 200 250
The bypass pipes and stop valves of water inlet and outlet pipelines shown in the above diagram must be
installed to facilitate cleaning of other systems outside of the water pipeline prior to the unit commissioning.
During maintenance, the water pipelines of the heat exchanger may be cut off without interference to other heat
exchangers.
CAUTION