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Optional Free-Cooling
Note for installation
The maximum pressure of the Glycol side when unit is equipped with free cooling is 400 kPa for Glycol free option
or 600kPa for Direct free cooling except on evaporator side for glycol free 1000 kPa Refer to unit nameplate for rated
value.
Pump operation with Glycol free : it is requested to have a minimum water side pressure of 250 kPa to avoid
FWD
Power supply
cavitation.
Capacities
Glycol free option : To avoid component damage, a filter (1 mm mesh) must be supplied by the customer and
Cooling capacity on water (1)
Heating capacity on water (2)
installed at the unit inlet.
Fan motor
All Free-cooling units must be freeze-protected with at least 30% Ethylene Glycol in the cooling loop circuit which is
Fan power input (3)
Current amps (3)
the most convenient percentage in order to protect the unit against freezing.
Start-up amps
Protection coverage with 30% Ethylene Glycol:
Air flow
minimum
- Freezing point without burst effect = -13°C
nominal
- Freezing point with burst effect = -50°C.
maximum
Main coil
Water can be trapped in BPHE and specific care must be taken to remove it completly from BPHE during off mode.
Water entering/leaving connections
Electric heater (accessory for blower only)
IMPORTANT – WATER QUALITY
Electric power supply
Heating capacity
Glycol or brine must be carefully chosen with the help of a reputable water treatment specialist. The additional
Hot water coil (accessory for blower only)
materials to the evaporator circuit are made with Carbon Steel, Copper, Zinc, Synthetic rubber, Aluminum AA3102,
Heating capacity (4)
G2 filter (filter box accessory)
AA3003, and AA4045. Water should be free from foreign solid particules.
Quantity
All Submittal, lifting diagram, neoprene pads positioning and wiring diagrams have been supplied with chiller order.
Dimensions ( LxWxth)
G4 filter (filter box accessory)
Quantity
Dimensions ( LxWxth)
Free cooler by-pass valve adjustment
Condensate pump (accessory)
For intervention on free cooler by-pass valve it is recommended to consult the valve service literature.
Water flow - lift height
Not available for FWD30 and FWD45
For every new referencing of the motor end travel, an adaptation of the motor should be done by pushing button 2
Sound level (L/M/H speed)
To change the bypass percentage follows below procedure:
Sound pressure level (5)
Sound power level (5)
− No tuning is needed on free cooling valve which always stays on full opening/closure.
Unit dimensions
Width x Depth
− For bypass valve Belimo, minimum opening can be adjusted by pushing the release button (4) and by
Height
turning handle 5 to 50% opening for instance (45°)
Shipped unit dimensions
Width x Depth
Height
Weight
Colour
Recommended fuse size
Unit alone (aM/gI)
Unit with electric heater (gI)
(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
(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.
(5) A rectangular glass wool duct 1m50 long is placed on the blower.The measurement is taken in the room containing the blower unit.
Heat exchanger operating limits:
FWD:
*water temperature: max 100° C
*absolute service pressure: min 1 bar/max 11 bars
Accessories - Hot water coil:
*water temperature: min. +2° C/max. 100° C
*absolute service pressure: min 1 bar/max 11 bars
4
78
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)
12
20
230/1/50
8,3
15
11,9
18,9
2 x direct drive centrifugal
0,46
0,65
2,2
3,1
5,5
9,3
980
1400
1650
2300
1970
2600
ISO R7 rotating female
3/4"
1 1/2"
230/1/50 or 400/3/50
400/3/50
8
10
12
17,4
2
2
486x271x8
586x321x8
2
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
350
1133 x 754
1333 x 864
310
360
46
61
galvanised steel
8/16
8/16
40 (230V),3*16 (400V)
3*20
30
45
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
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
76
118
8/25
8/25
3*25
3*25
UNT-PRC002-GB
RLC-SVX19E-GB
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