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Chilled Water Piping Recommendations
Water Treatment
In the evaporator the following material are in contact
with water:
• Water boxes are made of cast iron (GJL250 EN-code)
FWD
Power supply
• Tube plates are made of steel (P265GH code)
Capacities
• Tubes are made of copper
Cooling capacity on water (1)
Heating capacity on water (2)
• Turbulators when present in evaporator tubes are
Fan motor
made of phosphorous brass.
Fan power input (3)
Current amps (3)
When the unit is supplied with hydraulic module, the
Start-up amps
following additional materials are in contact with water:
Air flow
minimum
• Pump frame and connections are made of cast iron
nominal
• Water pipes are made of iron
maximum
Main coil
• Pipe sealings are made of EPDM rubber (ethylene
Water entering/leaving connections
propylene diene monomer rubber)
Electric heater (accessory for blower only)
• Pump sealings are made of silicon carbide
Electric power supply
• Strainer is made of stainless steel
Heating capacity
Hot water coil (accessory for blower only)
Heating capacity (4)
Notice!
G2 filter (filter box accessory)
Quantity
Dirt, scale, products of corrosion, and other foreign
Dimensions ( LxWxth)
material will adversely affect heat transfer between the
G4 filter (filter box accessory)
water and system components. Foreign matter in the
Quantity
chilled-water system can also increase pressure drop
Dimensions ( LxWxth)
and consequently, reduce water flow. Proper water
Condensate pump (accessory)
treatment must be determined locally, depending on the
Water flow - lift height
Not available for FWD30 and FWD45
type of system and local water characteristics.
Sound level (L/M/H speed)
Sound pressure level (5)
Neither salt nor brackish water is recommended for use
Sound power level (5)
Unit dimensions
in Trane air-cooled chillers. Use of either will lead to an
Width x Depth
unpredictably shorter life cycle. Trane encourages the
Height
employment of a reputable water treatment specialist,
Shipped unit dimensions
familiar with local water conditions, to assist in this
Width x Depth
Height
determination and in the establishment of a proper water
Weight
treatment program.
Colour
Recommended fuse size
Unit alone (aM/gI)
CAUTION! If using an acidic commercial flushing
Unit with electric heater (gI)
solution, construct a temporary bypass around the
unit to prevent damage to internal components of
(1) Conditions: Water entering/leaving temperature: 7/12 °C, Air inlet temperature 27/19°C DB/WB - Nominal air flow
(2) Conditions: Water entering/leaving temperature: 50/45 °C, Air inlet temperature 20°C DB - Nominal air flow
the evaporator. Trane assumes no responsibility for
(3) At high speed with nominal air flow.
equipment failures which results from untreated or
(4) Water entering/leaving temperature 90/70 °C, air inlet temperature 20 °C DB, Nominal air flow.
(5) A rectangular glass wool duct 1m50 long is placed on the blower.The measurement is taken in the room containing the blower unit.
improperly treated water or saline or brackish water.
If calcium chloride is used for water treatment, an
Heat exchanger operating limits:
FWD:
applicable corrosion inhibitor must also be used. Failure
*water temperature: max 100° C
to do so may result in damage to system components.
*absolute service pressure: min 1 bar/max 11 bars
Do not use untreated or improperly treated water.
Accessories - Hot water coil:
Equipment damage may occur.
*water temperature: min. +2° C/max. 100° C
*absolute service pressure: min 1 bar/max 11 bars
4
100
Technical Data
Notice: Coil Damage!
Failure to follow instructions below could result in
freecooling coil freeze. For units with free-cooling option,
introduction of uninhibited water into the system is not
recommended, as it could lead to internal corrosion and
08
risk of coil freeze. To avoid free-cooling coil damage:
(V/Ph/Hz)
• If the building loop needs to be charged with water for
(kW)
5,2
(kW)
6,3
(type)
(kW)
0,23
(A)
1,1
• Completely drain any water inadvertently introduced
(A)
3,2
(m
/h)
490
3
(m
/h)
820
3
• If water was introduced for hydronic testing, and was
(m
/h)
980
3
(type)
(Dia)
3/4"
(V/Ph/Hz)
230/1/50
Evaporator Piping
(kW)
2/4
(kW)
6,3
Evaporator water connections are grooved.
Thoroughly flush all water piping to the unit before
2
making the final piping connections to the unit.
(mm)
386x221x8
Components and layout will vary slightly, depending on
-
the location of connections and the water sources (see
(mm)
-
figure Typical RTAF water piping figure).
(type)
(l/h - mm)
An air vent is located on top of the evaporator at the
chiller water outlet. Be sure to provide additional air
(dB(A))
36/40/43
vents at the highest points in the piping to remove air
(dB(A))
46/50/53
from the chilled water system. Install necessary pressure
(mm)
890 x 600
gauges to monitor the entering and leaving chilled water
(mm)
250
pressure.
(mm)
933 x 644
(mm)
260
Provide shut off valves in lines to the gauges to isolate
(kg)
32
them from the system when they are not in use. Use
rubber vibration eliminators to prevent vibration
transmission through the water lines.
(A)
8/16
(A)
16 (2kW),25 (4kW)
If desired, install thermometers in the lines to monitor
entering and leaving water line to control water flow
balance. Install shutoff valves on both the entering and
leaving water lines so that the evaporator can be isolated
for service.
CAUTION! The chilled-water connections to the
evaporator are to be "grooved pipe" type connections.
Do not attempt to weld these connections, because the
heat generated from welding can cause microscopic
and macroscopic fractures on the cast iron water boxes
that can lead to premature failure of the water box. An
optional grooved pipe stub and coupling is available for
welding on flanges.
To prevent damage to chilled-water components, do not
allow evaporator pressure (maximum working pressure)
to exceed 10 Bar. The maximum service pressure
depends on free cooling type and potential pump
package option. The value of max service pressure is
indicated on unit nameplate.
A pipe strainer must be installed in the entering water
line. Failure to do so can allow waterborne debris to
enter the evaporator.
12
230/1/50
8,3
testing purposes, isolate free-cooling coils by closing
11,9
free-cooling service shut-off valve and modulating
2 x direct drive centrifugal
valve.
0,46
2,2
5,5
into the system, and replace with glycol fluid as
required for the free-cooling system.
980
1650
1970
not immediately replaced with glycol solution, a glycol
ISO R7 rotating female
(freeze inhibitor) solution must be introduced to the
3/4"
free-cooling system/coils for any long term storage.
230/1/50 or 400/3/50
400/3/50
8
12
2
486x271x8
586x321x8
2
486x264x48
586x314x48
Centrifugal
24 - 500
38/41/44
46/50/53
48/51/54
56/60/63
1090 x 710
1290 x 820
300
1133 x 754
1333 x 864
310
46
galvanised steel
8/16
40 (230V),3*16 (400V)
20
30
15
18,8
18,9
20,9
0,65
1,04
3,1
4,7
9,3
14,1
1400
1800
2300
3000
2600
3600
1 1/2"
1 1/2"
1 1/2"
400/3/50
400/3/50
10
12
17,4
22,4
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
350
450
1333 x 1008
1333*1133
360
460
61
76
8/16
8/25
3*20
3*25
UNT-PRC002-GB
RLC-SVX19G-GB
45
30,1
38,2
1,51
5,5
16,5
2700
4500
5400
12
34,5
2
2
650
660
118
8/25
3*25
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