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Maintenance
Refrigerant Piping
The compressor suction and discharge connections
and piping are copper clad steel for easy brazing. In
most instances, piping may be reused. If piping is not
FWD
reusable, order the correct service parts. Cut all tubing
Power supply
with a tubing cutter to prevent copper filings from
Capacities
Cooling capacity on water (1)
entering the system. Cut the tubing in a straight length
Heating capacity on water (2)
of pipe after the compressor connection has been
Fan motor
unsweated. The line can then be reinstalled using a slip
Fan power input (3)
coupling and brazing.
Current amps (3)
Start-up amps
Note: The compressor suction line configuration must
Air flow
not be changed in any way. Changing compressor
minimum
nominal
suction line configuration will compromise proper oil
maximum
return to the compressor(s).
Main coil
Water entering/leaving connections
Compressor Electrical Terminal Box
Electric heater (accessory for blower only)
Electric power supply
Be sure to protect the terminal box when unbrazing or
Heating capacity
brazing compressor refrigerant piping connections
Hot water coil (accessory for blower only)
Heating capacity (4)
G2 filter (filter box accessory)
Compressor Crankcase Heaters
Quantity
Dimensions ( LxWxth)
Compressor crankcase heaters must be energized
G4 filter (filter box accessory)
at least eight hours before starting the chiller. This is
Quantity
Dimensions ( LxWxth)
required to boil refrigerant out of the oil before startup.
Condensate pump (accessory)
Ambient temperature is not a factor and the crankcase
Water flow - lift height
heaters must always be energized prior to startup.
Not available for FWD30 and FWD45
Sound level (L/M/H speed)
Sound pressure level (5)
Condenser Maintenance
Sound power level (5)
Unit dimensions
Width x Depth
Condenser Coil Cleaning
Height
Clean the condenser coils at least once a year or
Shipped unit dimensions
more frequently if the unit is in a "dirty" environment.
Width x Depth
A clean condenser coil will help to maintain chiller
Height
Weight
operating efficiency. Follow the detergent manufacturer's
Colour
instructions to avoid damaging the condenser coils.
Recommended fuse size
Unit alone (aM/gI)
Black epoxy coil protection (option on heat pump units)
Unit with electric heater (gI)
It is recommended to clean the coils at unit start-up and
(1) Conditions: Water entering/leaving temperature: 7/12 °C, Air inlet temperature 27/19°C DB/WB - Nominal air flow
regularly to obtain optimum protection and life span of
(2) Conditions: Water entering/leaving temperature: 50/45 °C, Air inlet temperature 20°C DB - Nominal air flow
the condenser coils. To clean the condenser coils use a
(3) At high speed with nominal air flow.
(4) Water entering/leaving temperature 90/70 °C, air inlet temperature 20 °C DB, Nominal air flow.
soft brush and a sprayer such as a garden pump type or
(5) A rectangular glass wool duct 1m50 long is placed on the blower.The measurement is taken in the room containing the blower unit.
a high pressure type. A high quality detergent such as
Heat exchanger operating limits:
Trane Coil Cleaner is recommended.
FWD:
*water temperature: max 100° C
Note: If detergent mixture is strongly alkaline (pH value
*absolute service pressure: min 1 bar/max 11 bars
greater than 8 .5), an inhibitor must be added.
Accessories - Hot water coil:
*water temperature: min. +2° C/max. 100° C
*absolute service pressure: min 1 bar/max 11 bars
48
4
Technical Data
08
(V/Ph/Hz)
(kW)
5,2
(kW)
6,3
(type)
(kW)
0,23
(A)
1,1
(A)
3,2
(m
/h)
490
3
(m
/h)
820
3
(m
/h)
980
3
(type)
(Dia)
3/4"
(V/Ph/Hz)
230/1/50
(kW)
2/4
(kW)
6,3
2
(mm)
386x221x8
-
(mm)
-
(type)
(l/h - mm)
(dB(A))
36/40/43
(dB(A))
46/50/53
(mm)
890 x 600
(mm)
250
(mm)
933 x 644
(mm)
260
(kg)
32
(A)
8/16
(A)
16 (2kW),25 (4kW)
Evaporator Maintenance
The Trane Model CGAX liquid chiller uses a brazed plate
heat paddle (BPHE) evaporator with factory installed
flow switch that is positioned in the evaporator water
12
pipe. The evaporator inlet also includes a water strainer
230/1/50
that must be kept in place to keep debris out of the
8,3
evaporator.
11,9
18,9
Note: Strainer maintenance is critical to proper operation
2 x direct drive centrifugal
and reliability. Any particles larger than 1.6 mm entering
0,46
0,65
2,2
3,1
the BPHE evaporator may cause the evaporator to fail,
5,5
9,3
requiring replacement.
980
1400
1650
2300
Acceptable BPHE evaporator water flow rate is 1.4 to
1970
2600
4.2 l/ min per nominal unit kW capacity. To maintain
ISO R7 rotating female
12-7°C in/out chilled water temperatures, the nominal
3/4"
1 1/2"
water flow rate is 2.8 l/min per cooling kW. Minimum
water flow rate must be maintained to avoid laminar
230/1/50 or 400/3/50
400/3/50
8
flow, potential evaporator freezing, scaling and poor
temperature control. Maximum water flow is 6 m/s. Flow
12
17,4
rates greater than this will cause excessive erosion. The
2
BPHE evaporator is difficult to clean should it become
486x271x8
586x321x8
plugged with debris. Indications of a plugged BPHE
evaporator include "wet" suction due to lack of heat
2
exchange, loss of superheat control, discharge superheat
486x264x48
586x314x48
Centrifugal
less than 35°C, compressor oil dilution and/or starvation
24 - 500
and premature compressor failure.
Evaporator replacement
38/41/44
46/50/53
48/51/54
56/60/63
If the CGAX evaporator requires replacement, it is very
1090 x 710
1290 x 820
important that the new evaporator be replaced correctly
300
350
and with the correct refrigerant and water piping
1133 x 754
1333 x 864
connections. The refrigerant inlet/ liquid connection is at
310
360
the bottom of the evaporator and the refrigerant outlet/
46
suction connection is at the top of the evaporator and
galvanised steel
both are on the same side. Pay particular attention to
8/16
8/16
evaporators with dual circuits. Avoid cross-circuiting
40 (230V),3*16 (400V)
3*20
when installing the new evaporator.
20
30
45
15
18,8
30,1
20,9
38,2
1,04
1,51
4,7
5,5
14,1
16,5
1800
2700
3000
4500
3600
5400
1 1/2"
1 1/2"
400/3/50
400/3/50
10
12
12
22,4
34,5
2
2
586*421*8
586*621*8
2
2
586*414*48
586*614*48
47/52/57
47/52/58
57/62/67
57/62/68
1290 x 970
1290 x 1090
450
650
1333 x 1008
1333*1133
460
660
61
76
118
8/25
8/25
3*25
3*25
CG-SVX027D-GB
UNT-PRC002-GB
2
2
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