McQuay 4AC25CR / M4AC025CR Guide d'installation

Taper
Guide d'installation
AIR COOLED CHILLER
(C Series)
INSTALLATION MANUAL
Group: MINI CHILLER
Part Number: A08019025453
Date: JULY 2003
IM-ACC1&2-0703-McQuay
© 2003 McQuay International
English
4AC/AC 20/25/30 C/CR
4AC/AC 40/50/60 C/CR
1181,610,0 10,0
460,0
85,0 128,5
WATER
INLET
DRAINAGE
WATER
OUTLET
128,5
789,5
475,0
55,2
80,0 300,0
80,0
1181,6
460,0
85,0
128,5
15,0 15,0
300,079,7
20,0
80,3
1160,0
1409,4
878,8
WATER
INLET
DRAINAGE
WATER
OUTLET
OUTLINE AND DIMENSIONS
i
! Caution
Sharp edges and coil surfaces are potential locations which may cause
injury hazards. Avoid from being in contact with these places.
! Avertissement
Les bords coupants et les surfaces du refroidisseur tuulaire présentent
un risque de blessure. Mieux vaut éviter le contact avec ces endroits.
! Vorsicht
Scharfe Kanten und Wärmetauscherflächen stellen eine Gefahrenquelle dar.
Jeglicher Kontakt mit diesen Stellen ist zu vermeiden.
! Cautela
Per preservarsi da eventuali ferite, evitare di toccare gli spigoli affilali e la
superficie della serpentina.
! Осторожно
Острые края и поверхности змеевиков являются
потенциальными местами нанесения травм. Остерегайтесь
контакта с этими местами.
! Cuidado
Los Bordes afilados y la superficie del serpentín pueden producir lesiones.
Evite tocarlos.
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
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
ää
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
English
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
CD1 CD2 DF1DF2
N
COMP DISCHARGE SENSOR (1)
OUTDOOR AIR TEMP SENSOR
LEAVING WATER SENSOR
ENTERING WATER SENSOR
N/L2
220-240/1pH/50Hz
L/L1TB1
12V 12V 12V N1 N1 N1 1 2 O/F PUMPC/H
4WV
HTR
AL
IN
AL
OUT
LP HP FL
H
T
R
OF
OUT
OF
IN
TB3
L
N
C
OF
C
S
R
E
COMP.
L
N
E
PUMP
FUSE
10A
5B
4B 1A
2A
SWITCH
A
B
COMP
COMP
CAP
98
95
96
C O/L
TB2
OF
CAP
R
R
C
S
MODEL : 4AC / AC 20 C
PART NO : 50 13 4 066991
ELECTRICAL WIRING DIAGRAM
iii
CN6
N
WI WO OA
CD1 CD2 DF1 DF2
HEATOFF
COOLON
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
COMP DISCHARGE SENSOR (1)
OUTDOOR AIR TEMP SENSOR
LEAVING WATER SENSOR
ENTERING WATER SENSOR
N/L2
220-240/1pH/50Hz
L/L1TB1
12V 12V 12V N1 N1 N1 1 2 O/F PUMPC/H
4WV
HTR
AL
IN
AL
OUT
LP HP FL
H
T
R
OF
OUT
OF
IN
TB3
L
N
C
OF
C
S
R
E
COMP.
L
N
E
PUMP
FUSE
10A
5B
4B 1A
2A
SWITCH
A
B
COMP
COMP
CAP
98
95
96
C O/L
TB2
OF
CAP
R
R
C
S
MODEL : 4AC / AC 25 / 30 C
PART NO : 50 13 4 066992
iv
English
MODEL : 4AC / AC 40 / 50/ 60 C
PART NO : 50 13 4 076741
v
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
CO2
CO1
FLOW
PO
ALM
DE2
DE1
C/H
ON/OFF
WI
CN6
WO OA
CD1CD2 DF1 DF2
N
CA
B
OF 1
CAP
CA
B
OF 2
CAP
COMP DISCHARGE SENSOR (1)
OUTDOOR AIR TEMP SENSOR
LEAVING WATER SENSOR
ENTERING WATER SENSOR
S
380-415/3pH/50Hz
RTB1 T N
12V 12V 12V N1 N1 N1 N1 1
ON
OFF
COOL
HEAT
2 O/F C/H
4WV
HTR
AL
IN
AL
OUT
LP HP
FL
H
T
R
OF OUT
OF IN
TB3
TB2
L
N
C
OF 1
L
N
42 41
C
OF 2
U
V
W
E
COMP.
U
V
W
E
PUMP
FUSE
10A
5B
4B 1A
2A
SWITCH
31
81
71
NRST
PHASE
PROTECTOR
32
COMP PUMP
98
95
96
C O/L
98
95
96
P O/L
MODEL : 4AC / AC 20 CR
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
N
CN6
WI WOOA
CD1 CD2 DF1DF2
COMP DISCHARGE SENSOR (1)
OUTDOOR AIR TEMP SENSOR
LEAVING WATER SENSOR
ENTERING WATER SENSOR
N/L2
220-240/1pH/50Hz
L/L1TB1
12V 12V 12V N1 N1 N1 1 2 O/F PUMPC/H
HEATOFF
COOLON
4WV
HTR
AL
IN
AL
OUT
LP HP FL
H
T
R
OF
OUT
OF
IN
TB3
L
N
C
OF
C
S
R
E
COMP.
L
N
E
PUMP
FUSE
10A
5B
4B 1A
2A
SWITCH
A
B
COMP
COMP
CAP
98
95
96
C O/L
1
3
2
4
DEFROST SENSOR (1)
TB2
4WV
OF
CAP
R
R
5
7
6
8
R
E
L
A
Y
1
3
2
4
5
7
6
8
R
E
L
A
Y
R1
R2
C
S
PART NO : 50 13 4 066985
vi
English
MODEL : 4AC / AC 25 / 30 CR
PART NO : 50 13 4 066986
HEATOFF
COOLON
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
WOOA
CD1CD2DF1DF2
N
COMP DISCHARGE SENSOR (1)
OUTDOOR AIR TEMP SENSOR
LEAVING WATER SENSOR
ENTERING WATER SENSOR
N/L2
220-240/1pH/50Hz
L/L1TB1
12V 12V 12V N1 N1 N1 1 2 O/F PUMPC/H
4WV
HTR
AL
IN
AL
OUT
LP HP FL
H
T
R
OF
OUT
OF
IN
TB3
L
N
C
OF
C
S
R
E
COMP.
L
N
E
PUMP
FUSE
10A
5B
4B 1A
2A
SWITCH
A
B
COMP
COMP
CAP
98
95
96
C O/L
1
3
2
4
DEFROST SENSOR (1)
TB2
4WV
OF
CAP
R
R
5
7
6
8
R
E
L
A
Y
1
3
2
4
5
7
6
8
R
E
L
A
Y
R1
R2
C
S
vii
MODEL : 4AC / AC 40/ 50/ 60 CR
PART NO : 50 13 4 076742
HEATOFF
COOLON
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
N
C
A
B
OF 1
CAP
C
A
B
OF 2
CAP
COMP DISCHARGE SENSOR (1)
OUTDOOR AIR TEMP SENSOR
LEAVING WATER SENSOR
ENTERING WATER SENSOR
S
380-415/3pH/50Hz
RTB1 T N
12VTB2 12V 12V N1 N1 N1 N1 1 2 O/F C/H
4WV
HTR
AL
IN
AL
OUT
LP HP FL 4WV
OF OUT
OF IN
TB3
L
45 44
N
C
OF 1
L
N
C
OF 2
U
V
W
E
COMP.
U
V
W
E
PUMP
FUSE
10A
5B
4B 1A
2A
SWITCH
31
32
COMP PUMP
98
95
96
C O/L
98
95
96
P O/L
DEFROST SENSOR (1)
1R
E
L
A
Y
3
2
4
5
R1
R
E
L
A
Y
R2
7
6
8
1
3
2
4
5
7
6
8
H
T
R
CN6
WI WO OA
CD1 CD2 DF1
DF2
81
71
NRST
PHASE
PROTECTOR
viii
English
ix
ISOLATOR DIAGRAMS
TB1 L/L1 N/L2
N
L1
Power supply 230V / 1Ph-N / 50Hz
4AC/AC20/25/30 C/CR
AC TERMINAL BOX
ISOLATOR
E
FUSE
TB1 R S T N
NL1 L2
L3
Power supply 400V / 3Ph-N / 50Hz
4AC/AC40/50/60 C/CR
AC TERMINAL BOX
ISOLATOR
E
FUSE
x
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.: A08019025453
COOLING ONLY
R22
AC20C / MAC020C
AC25C / MAC025C
AC30C / MAC030C
AC40C / MAC040C
AC50C / MAC050C
AC60C / MAC060C
R407C
4AC20C / M4AC020C
4AC25C / M4AC025C
4AC30C / M4AC030C
4AC40C / M4AC040C
4AC50C / M4AC050C
4AC60C / M4AC060C
HEAT PUMP
R22
AC20CR / MAC020CR
AC25CR / MAC025CR
AC30CR / MAC030CR
AC40CR / MAC040CR
AC50CR / MAC050CR
AC60CR / MAC060CR
R407C
4AC20CR / M4AC020CR
4AC25CR / M4AC025CR
4AC30CR / M4AC030CR
4AC40CR / M4AC040CR
4AC50CR / M4AC050CR
4AC60CR / M4AC060CR
IM-ACC1&2-0703 (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 8
- Water Piping System Setup page 11
- Refrigerant Circuit page 11
-
Special Precautions When Dealing With R407C Unit
page 11
- Control Operation Guide page 12
- Servicing And Maintenance page 13
- Troubleshooting page 14
- Fan Speed Controller (Optional) page 15
- Isolator Switch Field Installation page 15
!!
!!
! 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-ii
- Electrical Wiring Diagram page iii-viii
- Isolator Diagram page ix-x
- Transportation page 1
- Installation Location page 2
- Unit Installation page 4
- Physical Data page 5
- Water Piping and Fitting page 7
- Electrical And Wiring page 7
- Electrical Data page 8
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 in the specification manual for assistance.
Ensure that the hanger belts are not touching the coil, top panel and front panel. Use hosting bracket (provided along with
this manual) as shown in Figure 2. Lift the unit slightly to make sure it is balance before placing it in location. Never swing
or roll the unit.
Figure 1
577
577
1-2
English
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. The discharged air should be directed outside using a duct
should the unit be installed in a plant room.
Vibration isolator should be provided 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 the
following figures for proper location.
500 500
500
1500
Figure 3: For single unit installation
AIR FLOW
AIR FLOW
AIR FLOW
MIN 500
Figure 2
HANGER
HANGING BELT
1-3
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.)
Figure 5: For floor installation
Note: All units are in mm unless specified.
500
1000
1000 500
1500
Figure 4: For multiple unit installation
AIR FLOW
AIR FLOW
AIR FLOW
AIR FLOW
AIR FLOW
AIR FLOW
AIR FLOW
MIN 500
50 50
100
1-4
English
4AC/AC 020/025/030 C/CR
UNIT INSTALLATION
!!
!!
! 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.
4AC/AC 040/050/060 C/CR
1-5
PHYSICAL DATA
Note: For cooling nominal values are based on 12°C / 7°C entering / leaving evaporator water temperature, 35°C air ambient temperature.
Table A-1 : R407C - Cooling Only
Model 4AC20C 4AC25C 4AC30C 4AC40C 4AC50C 4AC60C
Nominal cooling capacity kW 6.15 6.74 7.91 11.72 14.65 15.24
Operating Weight kg 115.5 122.5 128 195 196.4 203.2
Refrigerant charge R407C kg 1.13 1.85 1.65 3.40 3.35 3.45
Compressor 1 Rotary comp 1 Scroll compressor
Control system LCD Electronic Control
Refrigerant - water heat exchanger Brazed Plate Heat Exchanger
Water connections (BSP) inches 111111
Maximum water pressure kPa 1000 1000 1000 1000 1000 1000
Hydronic circuit
Pump High Head Circulator Horizontal Multistage End-Suction
Available pressure kPa 72.94 98.58 89.27 91.70 67.51 70.32
Water inlet connection (BSPT) inches 111111
Water outlet connection (BSPT) inches 111111
Drain tap coupling (BSPT) inches 1/2 1/2 1/2 1/2 1/2 1/2
Closed expansion tank water volume litre 222555
Refrigerant - air heat exchanger
Tube diameter mm 9.52 9.52 9.52 9.52 9.52 9.52
No. of rows 122222
Tubes/row 30 30 30 54 54 54
Fin spacing mm
1.27 1.59 1.59 1.59 1.59 1.59
O/D Fan
Diameter inches 18 18 18 18/2 18/2 18/2
No. of blades 555555
Air flow (high speed) m
3
/min 62.3 62.3 62.3 62.3 62.3 62.3
Fan speed (high speed) r/min 910 920 920 920 920 920
Table A-2 : R22 - Cooling Only
Model AC20C AC25C AC30C AC40C AC50C AC60C
Nominal cooling capacity kW 5.28 6.89 8.06 11.72 14.65 15.53
Operating Weight kg 115.5 122.5 128 195 196.4 203.2
Refrigerant charge R22 kg 1.13 1.80 1.56 2.68 3.10 3.10
Compressor 1 Rotary comp 1 Scroll compressor
Control system LCD Electronic Control
Refrigerant - water heat exchanger Brazed Plate Heat Exchanger
Water connections (BSP) inches 111111
Maximum water pressure kPa 1000 1000 1000 1000 1000 1000
Hydronic circuit
Pump High Head Circulator Horizontal Multistage End-Suction
Available pressure kPa 83.55 97.39 88.08 91.70 67.51 65.98
Water inlet connection (BSPT) inches 111111
Water outlet connection (BSPT) inches 111111
Drain tap coupling (BSPT) inches 1/2 1/2 1/2 1/2 1/2 1/2
Closed expansion tank water volume litre 222555
Refrigerant - air heat exchanger
Tube diameter mm 9.52 9.52 9.52 9.52 9.52 9.52
No. of rows 122222
Tubes/row 30 30 30 54 54 54
Fin spacing mm
1.27 1.59 1.59 1.59 1.59 1.59
O/D Fan
Diameter inches 18 18 18 18/2 18/2 18/2
No. of blades 555555
Air flow (high speed) m
3
/min 62.3 62.3 62.3 62.3 62.3 62.3
Fan speed (high speed) r/min 910 920 920 920 920 920
1-6
English
Note: For cooling nominal values are based on 12°C / 7°C entering / leaving evaporator water temperature, 35°C air ambient temperature.
For heating nominal values are based on 40°C / 45°C entering / leaving evaporator water temperature, 7°C/6°C (DB/WB) air ambient temperature.
Table A-3 : R407C - Heatpump
Model 4AC20CR 4AC25CR 4AC30CR 4AC40CR 4AC50CR 4AC60CR
Nominal cooling capacity kW 4.98 6.45 7.33 11.72 13.48 14.95
Nominal heating capacity kW 5.86 7.47 9.53 13.19 14.95 17.58
Operating Weight kg 115.5 122.5 128.0 195.0 196.4 203.2
Refrigerant charge R407C kg 1.50 1.75 1.60 3.00 3.45 4.00
Compressor 1 Rotary comp 1 Scroll compressor
Control system LCD Electronic Control
Refrigerant - water heat exchanger Brazed Plate Heat Exchanger
Water connections (BSP) inches 111111
Maximum water pressure kPa 1000 1000 1000 1000 1000 1000
Hydronic circuit
Pump High Head Circulator Horizontal Multistage End-Suction
Available pressure (Cooling / Heating) kPa 87.21/76.47 100.89/92.77 93.89/76.38 91.70/74.54 82.15/63.75 74.67/35.27
Water inlet connection (BSPT) inches 111111
Water outlet connection (BSPT) inches 111111
Drain tap coupling (BSPT) inches 1/2 1/2 1/2 1/2 1/2 1/2
Closed expansion tank water volume litre 222555
Refrigerant - air heat exchanger
Tube diameter mm 9.52 9.52 9.52 9.52 9.52 9.52
No. of rows 122222
Tubes/row 30 30 30 54 54 54
Fin spacing mm
1.27 1.59 1.59 1.59 1.59 1.59
O/D Fan
Diameter inches 18 18 18 18/2 18/2 18/2
No. of blades 555555
Air flow (high speed) m
3
/min 62.3 62.3 62.3 62.3 62.3 62.3
Fan speed (high speed) r/min 910 920 920 920 920 920
Table A-4 : R22 - Heatpump
Model AC20CR AC25CR AC30CR AC40CR AC50CR AC60CR
Nominal cooling capacity kW 5.28 6.74 8.06 11.72 13.48 15.53
Nominal heating capacity kW 6.45 7.33 9.23 12.60 15.24 17.29
Operating Weight kg 115.5 122.5 128.0 195.0 196.4 203.2
Refrigerant charge R22 kg 1.55 1.93 1.75 3.00 3.65 4.00
Compressor 1 Rotary comp 1 Scroll compressor
Control system LCD Electronic Control
Refrigerant - water heat exchanger Brazed Plate Heat Exchanger
Water connections (BSP) inches 111111
Maximum water pressure kPa 1000 1000 1000 1000 1000 1000
Hydronic circuit
Pump High Head Circulator Horizontal Multistage End-Suction
Available pressure (Cooling / Heating) kPa 83.55/69.27 98.58/93.89 88.08/78.76 91.70/81.42 82.15/60.12 65.98/39.62
Water inlet connection (BSPT) inches 111111
Water outlet connection (BSPT) inches 111111
Drain tap coupling (BSPT) inches 1/2 1/2 1/2 1/2 1/2 1/2
Closed expansion tank water volume litre 222555
Refrigerant - air heat exchanger
Tube diameter mm 9.52 9.52 9.52 9.52 9.52 9.52
No. of rows 122222
Tubes/row 30 30 30 54 54 54
Fin spacing mm
1.27 1.59 1.59 1.59 1.59 1.59
O/D Fan
Diameter inches 18 18 18 18/2 18/2 18/2
No. of blades 555555
Air flow (high speed) m
3
/min 62.3 62.3 62.3 62.3 62.3 62.3
Fan speed (high speed) r/min 910 920 920 920 920 920
1-7
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 6.
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.
!!
!!
! 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.
P
P
4AC/AC 20/25/30 C/CR
4AC/AC 40/50/60 C/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
Figure 6
THERMOMETER
GATE VALVE
GATE VALVE
BALANCING
VALVE
STRAINER
CHECK
VALVE
MAKE UP
VALVE
BYPASS VALVE
(DIFFER ENT PRESSURE TYPE)
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)
ELECTRICAL AND WIRING
Refer to the wiring diagram provided on the unit when making electrical wiring.
Do not ground any electrical equipment to the water piping.
Install an external isolator switch (if it is not provided) to prevent electrical shock.
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McQuay 4AC25CR / M4AC025CR Guide d'installation

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Guide d'installation