McQuay TANDEM ROTARY User manual

AIR COOLED CHILLER
(TANDEM ROTARY & R410A)
INSTALLATION MANUAL
Group: MINI CHILLER
Part Number: A08019025451
Date: MARCH 2004
IM-5ACC-0304-McQuay
© 2004 McQuay International

i
OUTLINES AND DIMENSIONS
5AC 030 CR
5AC 040 / 050 / 055 CR
406,5
79,4 80,6
15,0
85,0 70,5
70,0
36,5
281,5
50,0452,0
724,9
882,9
982,9
15,0 1029,0
300,0
WATER IN
ELECTRICAL
CABLE
WATER OUT
10,0 10,0
1051,6
1010,0
22,3 22,3
81,4 283,3 50,0
147,3
WATER
OUTLET
WATER
INLET
94,2
479,0
789,5

ii
This product is subjected to Waste of Electrical and Electronic Equipment Regulations (WEE
E
Regulations). The waste product shall be separately collected by specific collection and treatment centre
.
P
lease refer to local authorithy for these centres. This is only applicable to European Union countries
.
Ce produit est soumis
à
la r
à
é
r
r
é
é
é
lectriques e
t
é
é
é
ê
é
é
é
é
é
é
é
é
é
î
î
tre ces centres. Ceci
îî
est uniquement applicable aux pays de l'Union Euro
p
é
enne
.
Questo prodotto
è
soggetto alle disposizioni RAEE (Rifiuti di apparecchiature elettriche ed elettroniche)
.
à
à
locali. Questa disposizione
à
è
valida solamente i paes
i
d
el
l
’
U.
E
.
é
ctrico y Electr
ó
n
ico en materia d
e
ñ
ñ
á
í
fico
íí
de colecc
i
ó
solamente aplicable a los p
a
í
ses de la
U
n
i
ó
n
Europea
.
Dieses Produkt unterliegt den Bestimmungen zur Entsorgung von elektrischen und elektronische
n
G
er
ä
ä
ä
tes
ä
ä
ü
ü
ll bei Ihrer
ö
ü
ö
ä
ndiges Abfall-Amt. Dieser
ää
Hinweis gilt nur f
ü
f
f
rL
ä
ischen Union
.
П
р
оцес
с
у
тилизаци
и
д
анног
о
прод
у
кт
а
рег
у
лир
у
етс
я
п
р
авилам
и
п
о
у
тилизаци
и
отхо
д
о
в
и
(WEEE Re
g
ulations).
и
,
.
Э
т
и
п
р
авил
а
Ев
р
опейског
о
.
NOTICE

iii
ELECTRICAL WIRING DIAGRAM
PART NO : 5013 4 076380
MODEL : 5AC 030 CR
O/FC/H
HEAT OFF
COOL ON
LIVE
COM2
COM1
BOILER
W_PUMP
OUT_FAN2
4WV2
A_FREEZE
ALM_OUT
ALM_IN
4WV1
OUT_FAN1
AUX-H
12V
F02
F01
LP2
LP1
HP2
HP1
C02
C01
FLOW
PO
ALM
DE2
DE1
C/H
ON/OFF
WI
CN6 WO OA
CD1CD2 DF1DF2
N
STN
380-420/3PH-N/50Hz
RTB1
12V 12V N1 N1 N1 N1 1 2
P4WV
HTR AL
IN
AL
OUT
FL HP LP H
T
R
CS
R
COMP
1
FUSE
10A
5B
4B 1A
2A
TB3
OF IN
OF OUT
SWITCH
A
B
1
3
2
4
TB2
4WV
OF 1
CAP
5
7
6
8
R
E
L
A
Y
R1
1
3
2
4
5
7
6
8
R
E
L
A
Y
R2
C
R
R
COMP 1
CAP
SR
R
COMP 2
CAP
S
4
POWER RELAY
COMP 2
16
5
4
POWER RELAY
COMP 1
16
5
CS
R
COMP
2
LN
PUMP
CNL
OF 1
COMP DISCHARGE SENSOR (2)
COMP DISCHARGE SENSOR (1)
OUTDOOR AIR TEMP SENSOR
LEAVING WATER SENSOR
ENTERING WATER SENSOR
DEFROST SENSOR (1)

iv
MODEL : 5AC 040 / 050 / 055 CR
PART NO : 5013 4 076381
STN
380-420/3PH-N/50Hz
RTB1
O/FC/H
HEAT OFF
COOL ON
LIVE
COM2
COM1
BOILER
W_PUMP
OUT_FAN2
4WV2
A_FREEZE
ALM_OUT
ALM_IN
4WV1
OUT_FAN1
AUX-H
12V
F02
F01
LP2
LP1
HP2
HP1
C02
C01
FLOW
PO
ALM
DE2
DE1
C/H
ON/OFF
WI
CN6 WO OA
CD1CD2 DF1DF2
N
COMP DISCHARGE SENSOR (2)
COMP DISCHARGE SENSOR (1)
OUTDOOR AIR TEMP SENSOR
LEAVING WATER SENSOR
ENTERING WATER SENSOR
12V 12V N1 N1 N1 N1 1 2
P4WV
HTR AL
IN
AL
OUT
FL HP LP
H
T
R
CS
R
FUSE
10A
5B
4B 1A
2A TB3
OF IN
OF OUT
41
SWITCH
A
B
OF 2
CAP
1
3
2
4
DEFROST SENSOR (1)
TB2
4WV
OF 1
CAP
A
B
5
7
6
8
R
E
L
A
Y
R1
1
3
2
4
5
7
6
8
R
E
L
A
Y
R2
C
R
R
COMP 1
CAP
SR
R
COMP 2
CAP
S
4
POWER RELAY
COMP 2
16
5
4
POWER RELAY
COMP 1
16
5
C
CS
R
LN
PUMP
COMP
2
COMP
1
LNC
OF 1
LNC
OF 2

v
Figure 1
HANGER
HANGING BELT
577,0
577,0
Figure 2

vi
500 500
500
1500
Figure 3
Figure 4
Figure 5
AIR FLOW
AIR FLOW
AIR FLOW
MIN 500
500 1000 1000 500
1500
AIR FLOW
AIR FLOW
AIR FLOW
AIR FLOW
AIR FLOW
AIR FLOW
AIR FLOW
50 50
100
MIN 500

vii
UNIT INSTALLATION
5AC 030 CR
Figure 6a
Figure 6b
5AC 040 / 050 / 055 CR

viii
P
Figure 7
5AC 030 CR
5AC 040 / 050 / 055 CR
PRESSURE GAUGE
GATE
VALVE
GATE
VALVE
BALANCING
VALVE
THERMOMETER
FLEXIBLE
GATE VALVE (LOWER
POSITION FOR DRAINAGE)
AIRVENT (INSTALL
HIGHEST POSITION)
FAN COIL UNIT/AIR HANDLING UNIT
GATE
VALVE
THERMOMETER
GATE VALVE GATE VALVE
BALANCING
VALVE
STRAINER
CHECK
VALVE
MAKE UP
VALVE
BYPASS VALVE
(DIFFER ENT PRESSURE TYPE)
P
PRESSURE GAUGE
GATE
VALVE
GATE
VALVE
BALANCING
VALVE
THERMOMETER
FLEXIBLE
GATE VALVE (LOWER
POSITION FOR DRAINAGE)
AIRVENT (INSTALL
HIGHEST POSITION)
FAN COIL UNIT/AIR HANDLING UNIT
GATE
VALVE
THERMOMETER
GATE VALVE GATE VALVE
BALANCING
VALVE
STRAINER
CHECK
VALVE
MAKE UP
VALVE
BYPASS VALVE
(DIFFER ENT PRESSURE TYPE)
!!
!!
!CAUTION
• Improper handling of unit during installation could result in leaks, electrical shock or unit malfunction.
• Contact your dealer for reinstallation or dismantling of unit.
• Do not introduce foreign objects such as fingers, sticks etc. into the air inlet and air outlet.
• Do not climb or place objects on top of mini chiller.

ix
Figure 8 5AC 030 CR
WATER / REFRIGERANT WATER / REFRIGERANT CIRCUIT DIAGRAM
5AC 040 / 050 CR
Figure 9
4WV
FILTER
DRIER
OIL
RETURN
TUBE
COMPRESSOR 1
CHECK
VALVE
OIL
RETURN
TUBE
TWIN TUBE
JOINT
LIQUID RECEIVER
COMPRESSOR 2
BPHE
WATER
OUT
WATER
IN
EXPANSION
TANK
4WV
EXPANSION TANK
FILTER
DRIER
OIL
RETURN
TUBE
COMPRESSOR 1
CHECK
VALVE
OIL
RETURN
TUBE
TWIN TUBE
JOINT
COMPRESSOR 2
BPHE
WATER OUT
WATER IN
PUMP
PUMP
WATER / REFRIWATER / REFRIGERANT CIRCUIT DIAGRAM
CHARGE
COMPENSATOR
TXV
TXV
SUB -
ACCUMU-
LATOR

x
Figure 11
5AC 055 CR
Figure 10
4WV
FILTER
DRIER
OIL
RETURN
TUBE
COMPRESSOR 1
CHECK
VALVE
OIL
RETURN
TUBE
TWIN TUBE
JOINT
LIQUID RECEIVER
COMPRESSOR 2
BPHE
WATER
OUT
WATER
IN
EXPANSION
TANK
PUMP
WATER / REFRIWATER / REFRIGERANT CIRCUIT DIAGRAM
TXV
SUB -
ACCUMU-
LATOR
TB1 R S T
Power supply 380 ~ 420V / 3Ph-N / 50Hz
5AC 030 / 040 / 050 / 055 CR
AC TERMINAL BOX
ISOLATOR
FUSE
E
L1 L2
N
L3 N

xi
Figure 13
Figure 12
15 Nm
TB3
Power supply 380 ~ 420V / 3Ph-N / 50Hz
Remove this wire
when doing wiring
for fan speed
controller
OF IN OF OUT
OF IN OF OUT
Wiring for fan
speed controller
(FSC) FSC
TB3
TO (PCB)
OUT_FAN1
TO (A) OF_1
CAPACITOR
L1 N
TB1 RSTN
L2 L3
5AC 030 / 040 / 050 / 055 CR

xii
Figure 14
5AC 040 / 050 / 055 CR5AC 030 CR

English
This manual provides the procedures of installation to ensure a safe and good standard of operation for the
chiller.
Special adjustments may be necessary to suit local requirements.
Before using the chiller, please read this instruction manual carefully and keep it for future reference.
INSTALLATION MANUAL
AIR COOLED CHILLER
MODEL
Part No.: A08019025451
HEAT PUMP
R410A
5AC030CR / M5AC030CR
5AC040CR / M5AC040CR
5AC050CR / M5AC050CR
5AC055CR / M5AC055CR
IM-5ACC-0304 (1)-McQuay
!!
!!
!WARNING
• Installation and maintenance should be performed by qualified person who are familiar with local code and
regulation, and experienced with this type of appliance.

1-1
- Recommended Fuse And Cable Sizes page 3
- Isolator Switch Field Installation page 4
- Fan Speed Controller (Optional) page 4
- Refrigerant Circuit page 4
-
Special Precautions When Dealing With R410A Unit page 4
- Control Operation Guide page 5
- Servicing And Maintenance page 6
- Troubleshooting page 7
!!
!!
!CAUTION
Please take note of the following important points when installing.
• Do not install the unit where leakage of flammable gas may occur.
If gas leaks and accumulates around the unit, it may cause fire ignition.
• Do not overcharge the unit.
This unit is factory pre-charged. Overcharge will cause over-current or damage to the compressor.
• Sharp edges and aluminium fin coil surface are potential which may cause injury hazards.
Avoid from being in contact with these locations.
INDEX
- Outline And Dimensions page i
- Electrical Wiring Diagram page iii
- Unit Installation page vii
- Transportation page 1
- Installation Location page 1
- Physical Data page 2
- Water Piping and Fitting page 2
- Electrical And Wiring page 3
- Electrical Data page 3
TRANSPORTATION
• Use spreader bars or forklift to lift the unit to avoid damage to the panels. Figure 1 provides the dimensions of the crate for
lifting. Avoid violent movements. Do not remove crate until it is at its final location.
• If necessary, use crane for unit above 11kW. Check that the hanger belts are able to support the unit. Refer to the weight
of the unit given for assistance.
• Ensure that the hanger belts are not touching the coil, top panel and front panel. Use hoisting bracket (provided along with
this manual) as shown in Figure 2. Lift the unit slightly to make sure it is balanced before placing it in location. Never
swing or roll the unit.
INSTALLATION LOCATION
• Installation work should be done by the authorized dealer or qualified contractor. Never install the unit yourself.
• Make sure there is sufficient space for airflow around the unit.
• Anti-vibration mounts should be installed to prevent vibration and noise from the unit.
• When installing the unit on the ground, make sure the selected site is not subject to flooding.
• There should be sufficient space allocated for ventilation, servicing and maintenance when installing the unit. Refer to
figure 3 and 4 for proper location.

1-2
English
Note: For cooling nominal values are based on 12°C / 7°C entering / leaving evaporator water temperature, 35°C air ambient temperature.
• Unit subjects to floor installation must be placed on a concrete slab. The slab must have thickness of 100mm and 50mm
wider and longer than the footprint of the unit (Figure 5). Place the concrete slab a distant from building to prevent
vibration and noise.
• In the case of heatpump operation with an outdoor temperature below 0°C, the unit must be installed at least 300mm above
ground level. This is necessary to prevent ice from accumulating on the frame and to permit proper operation in the event
of heavy snowfalls.
• The unit must be leveled on both axes. (Tolerance is less than 2mm per meter.)
WATER PIPING AND FITTING
• All water pipe must be adequately insulated to prevent capacity losses and condensation.
• Install a 40 to 60-mesh strainer to ensure good water quality.
• Water pipes recommended are black steel pipe and copper pipe.
• During installation, the piping of the unit should be clamped before rotating the installation pipe to reduce the moment
induce on the piping.
• Users are recommended to install the pipes and accessories as shown in Figure 7.
• An air vent must be installed at the highest position, while a drainage plug at the lowest position of the water circuit. After
the leak test (0.6MPa), open the air vent to release any air trapped in the water circuit.
• Run the clean water through the water inlet and operate the pump to drain out the dirty water. Clean the strainer after
running the pump for 30 minutes.
• Fill up the water circuit after connecting the pipes and equipment. Check water leakage at all connections and joints. Do
not start the unit when the system is leaking.
• To optimize the capacity of the system, ensure that the system is free of air bubbles. The air trapped in the system would
make the system unbalanced.
Table A : R410A - Heatpump Unit
Model 5AC030CR 5AC040CR 5AC050CR 5AC055CR
Nominal cooling capacity kW 7.85 10.98 13.76 14.64
Nominal heating capacity kW 9.53 11.95 14.93 16.11
Capacity control 0 ~ 50 ~ 100% 0 ~ 40 ~ 60 ~ 100% 0 ~ 50 ~ 100%
Operating Weight kg 125.1 165.1 166.5 173.3
Refrigerant charge R410A kg 2.2 3.55 4.20 4.30
Compressor 2 Rotary Compressors
Control system LCD Electronic Control
Sound Pressure Level dB (A) 58 60 60 60
Refrigerant - water heat exchanger Brazed Plate Heat Exchanger
Water connections (BSP) inches 1 1 1 1
Maximum water pressure kPa 1000 1000 1000 1000
Hydronic circuit
Pump Horizontal Multistage End-Suction
Available pressure (Cooling/Heating) kPa 90/76 100/89 79/64 74/57
Water inlet connection hose inches 1 1 1 1
Water outlet connection hose inches 1 1 1 1
Drain tap coupling (BSPT) inches 1/2 1/2 1/2 1/2
Refrigerant - air heat exchanger
Tube diameter mm 9.52 9.52 9.52 9.52
No. of rows 2 2 2 2
Tubes/row 30 54 54 54
Fin spacing mm 1.59 1.59 1.59 1.59
O/D Fan
Diameter / Number mm 457/1 457/2 457/2 457/2
Nominal air flow m3/min 62.3 62.3 62.3 62.3
Nominal fan speed r/min 920 920 920 920
PHYSICAL DATA

1-3
Model 5AC030CR 5AC040CR 5AC050CR 5AC055CR
Voltage Range ** 380 ~ 420V /3Ph /50Hz + N + !
Recommended Fuse * A 25 29 33 36
Power Supply Cable Size * mm2 10 10 10 10
Number of Conductor 3 3 3 3
Interconnection Cable Size * mm2 1.5 1.5 1.5 1.5
!!
!!
!CAUTION
• Do not allow water to remain in the water pipes if the unit is not operating for a long period.
Water must be drained out if the unit is not running during winter. Failing to do so would cause the pipe to crack.
• Do not drink the chilled water in the unit.
ELECTRICALAND WIRING
• Refer to the wiring diagram provided on the unit when making electrical wiring. See page iii / iv.
ELECTRICAL DATA
Table B : ( R410A - Heatpump )
Model 5AC030CR 5AC040CR 5AC050CR 5AC055CR
Power Supply V-ph-Hz 400 / 3 /50 400 / 3 /50 400 / 3 /50 400 / 3 /50
Voltage range V 380 ~ 420 380 ~ 420 380 ~ 420 380 ~ 420
Nominal Power Input (Cooling/Heating) kW 3.7 / 3.6 4.3 / 4.5 5.1 / 5.1 5.3 / 5.4
Nominal Current Input (Cooling/Heating) A 5.6 / 5.5 6.8 / 7.0 7.7 / 7.8 8.3 / 8.5
Maximum Continous Current (Comp 1/2) A 12.5 / 12.5 12.5 / 18.3 15.4 / 19.4 19.4 / 19.4
Full Load Current (Comp 1/2) A 35.2 / 35.2 35.2 / 67.0 58.0 / 68.0 68.0 / 68.0
Pump Power Input (Cooling/Heating) W 199 / 214 312 / 322 339 / 347 345 / 353
RECOMMENDED FUSE AND CABLE SIZES
IMPORTANT : * The figures shown in the table are for information purpose only. They should be checked and selected to
comply with the local/national codes of regulations. This is also subjected to the type of installation and
conductors used.
** The appropriate voltage range should be checked with label data on the unit.
!!
!!
!CAUTION
• All field wiring must be installed in accordance with the national wiring regulation.
• All the terminals and connections must be tightened. Improper connection and fastenings could cause electric shock,
short circuit and fire.
• Ensure that the rated voltage of the unit corresponds to that of the name plate before commencing wiring work
according to the wiring diagram.
• The unit must be GROUNDED to prevent possible hazards due to insulation failure. Do not ground any electrical
equipment to the water piping.
• All electrical wiring must not touch the refrigerant piping, compressor, pump, fan motor or any moving parts of
the fan motors.
• Do not operate the chiller with wet hands. It would result in electric shock.
• Do not use fuse of different amperage than stated. Using wire etc. to replace a fuse could cause equipment damage
or fire.
• Neutral wire size must be 3 times larger than the incoming live wire size.

1-4
English
REFRIGERANT CIRCUIT
• All chiller units are pre-charged with R410A refrigerant.
SPECIAL PRECAUTIONS WHEN DEALING WITH R410A UNIT
• R410A is a near azeotrope refrigerant blend of hydro fluorocarbon (HFC) which is environmental friendly. It has Zero
Ozone Depletion Potential (ODP=0) and this conforms to Montreal Protocol regulations. It has no flame propagation and
a low toxic refrigerant (rated as A1 by ARI). R410A is a mixture of R32 (50%) and R125 (50%).
• POE oil is used as lubricant for R410A compressor, which is different from the mineral oil used for R22 compressor.
During installation or servicing, extra precaution must be taken not to expose the R410A system too long to moist air.
Residual POE oil in the piping and components can absorb moisture from the air.
• Refrigerant R410A is more easily affected by dust of moisture compared with R22, make sure to temporarily cover the
ends of the tubing prior to installation.
• No additional charge of compressor oil only is permitted.
• No refrigerant other than R410A is permitted.
• Tools designed specifically for R410A only.
i) Manifold gauge and charging hose
ii) Gas leak detector
iii) Refrigerant cylinder/charging cylinder
iv) Vacuum pump c/w adaptor
v) Flare tools
vi) Refrigerant recovery machine
!!
!!
!CAUTION
• R410A must be charged as liquid. Usually R410A cylinder is equipped with a dip-pipe for liquid withdrawal.
If there is no dip-pipe, the cylinder should be inverted so as to withdraw liquid R410A from the valve.
• Do not top-up when servicing leak, as this will reduce the unit performance. Vacuum the unit thoroughly and then
charge the unit with fresh R410A according to the amount recommended in the specification.
• Do not touch the compressor or refrigerant piping when the chiller is running. If necessary wear protective gloves.
Operation of the mini chillers without any fan speed control is limited to an ambient temperature of 17°C. With the fan speed
control, the units are able to operate down to -5°C.
The fan speed controller does not come as a standard item in the mini chiller units. It is field-installed.
All mini chillers will have a 1/4" access valve provided for along the liquid line of the refrigerant circuit. This valve is for
direct pressure connection to the fan speed controller.
To install the fan speed controller, screw in the female adaptor to the 1/4" access valve. Use a pair of spanners to tighten
properly (max. torque 15 Nm). See Fig. 12. Ensure there is no leakage at the joint.
Wire the fan speed controller to the terminal blocks. See Fig. 13.
FAN SPEED CONTROLLER (OPTIONAL)
ISOLATOR SWITCH FIELD INSTALLATION
The isolator switch does not come as standard item with the units. It is advisable to have it field installed. The isolator switch
must be capable of making, carrying and breaking currents under normal circuit condition. It must be ofAC23A duty and fully
compliant to IEC: 947-3.
For isolator switch selection, check the starting and running consumption specified in the Table B. Be sure to connect a ground
wire from incoming power supply, either direct to the terminal box panel or use an auxillary ground terminal in the isolator
switch. To install an isolator switch, wire it to the terminal block as shown in Figure 11.

1-5
1. Handset location
The handset is located in the terminal box behind the service panel.
2. LED Display (microprocessor board)
The keypad LED will light up when the unit is powered up.
The LCD will light up when the unit is turned on.
3. LCD display (controller handset)
During normal operations, the LCD can display the entering water temperature, the leaving water temperature, the enter-
ing water setpoint temperature, compressor on or off status and outdoor air temperature. When malfunctioning occurred,
the LCD would blink. The display would show the faulty parameter and the date and time of the occurrence.
4. Controller functioning specification
There is a 3 minute delay for the compressor and fan motor to restart (default setting).
CONTROL OPERATION GUIDE
The unit is equipped with a microprocessor controller board. The microprocessor controller is provided to give temperature
control for the system by accurately measuring and controlling the water entering and water leaving temperature. The tem-
perature setting in the unit is preset in the factory. It is not recommended to change the setting unless necessary. A wired
controller handset is connected to the microprocessor board. Every parameter setting and reading can be observed from the
LCD of the handset.
!!
!!
!CAUTION
• Use the controller handset to switch on / off the unit. Do not plug off the main power supply directly, it would cause
the unit to breakdown.
• Do not change the settings of the safety devices.
• Installation
When fastening the LCD panel to the bracket,
Step 1 Step 2
Hook the LCD panel
from the top first
Push to fasten the LCD
panel to the bracket

1-6
English
1. A 3V DC battery is supplied with the LCD. It is used to ensure that the LCD displays real time once the timer is set.
2. The LCD is wired to the main board via CN8 connection. (This is factory installed)
If the wiring between the LCD and PCB must be longer, an alternative is used. Use a 4-core wire of the desired length and
connect this wire between the terminal block CN2 on the LCD to the terminal block CN5 on the PCB. Ensure that the
correct wire terminals are connected.
3. Networking between chillers can be carried out. Connect the wire as shown
• Servicing
Servicing or maintenance of these units must be carried out by experienced personnel with specific training in refrigeration.
Repeatedly check the safety devices and continuous cycling of control components. These items must be analyzed and
corrected before being reset.
The simple design of the refrigeration circuit totally eliminates potential problems during normal unit operation. No mainte-
nance work is needed on the refrigeration circuit as long as the unit is operating normally.
Ease of maintenance has been taken into consideration during the design stage such that the unit is easily accessible from the
service panels. The electrical components are especially easy to access since it is located in the terminal box in the front
service panel (Figure 14).
Under normal circumstances, these chillers required only a check and cleaning of air intake through the coil surface. These
can be done monthly or quarterly depending on the surrounding where the units are installed.
When the surrounding is very oily or dusty, then the coils must be regularly cleaned by a qualified air condition service
technician to ensure sufficient cooling capacity and efficient unit operation. The normal life span might be shortened if no
proper service is provided.
• Maintenance
For consistent performance and durability, always conduct proper and regular maintenance to the unit.
For prolong period of operation time, the heat exchanger will become dirty impairing its effectiveness and reducing the
performance of the units. Consult your local dealer about the cleaning of the heat exchanger.
No major maintenance or servicing is needed for the internal water circuit in the unit except the water pump failure. It is
advisable to conduct regular check on the filter and change the water filter if it is dirty or choked.
Always check the water level in the system in order to protect the moving components in the hydraulic kit from over heating
and excessive wear.
SERVICING AND MAINTENANCE
When removing the LCD panel from the bracket,
Step 1 Step 2
Remove the LCD panel
from the bottom part first
with help of a screw driver
Remove the
LCD panel
Factory installed
Alternative wiring between LCD panel and PCB
For networking only
A
A
A
B
B
B12V
12V
12V
GND
GND
GND
JP13
CN8
CN2
CN5
Main Board Unit 00
LCD Panel
PCB Unit 01