CG-SVX027D-GB
20
4 UNT-PRC002-GB
Technical Data
FWD 08 12 20 30 45
Power supply (V/Ph/Hz) 230/1/50
Capacities
Cooling capacity on water (1) (kW) 5,2 8,3 15 18,8 30,1
Heating capacity on water (2) (kW) 6,3 11,9 18,9 20,9 38,2
Fan motor (type) 2 x direct drive centrifugal
Fan power input (3) (kW) 0,23 0,46 0,65 1,04 1,51
Current amps (3) (A) 1,1 2,2 3,1 4,7 5,5
Start-up amps (A) 3,2 5,5 9,3 14,1 16,5
Air flow
minimum (m
3
/h) 490 980 1400 1800 2700
nominal (m
3
/h) 820 1650 2300 3000 4500
maximum (m
3
/h) 980 1970 2600 3600 5400
Main coil
Water entering/leaving connections (type) ISO R7 rotating female
(Dia) 3/4" 3/4" 1 1/2" 1 1/2" 1 1/2"
Electric heater (accessory for blower only)
Electric power supply (V/Ph/Hz) 230/1/50 230/1/50 or 400/3/50 400/3/50 400/3/50 400/3/50
Heating capacity (kW) 2/4 8 10 12 12
Hot water coil (accessory for blower only)
Heating capacity (4) (kW) 6,3 12 17,4 22,4 34,5
G2 filter (filter box accessory)
Quantity 2 2 2 2 2
Dimensions ( LxWxth) (mm) 386x221x8 486x271x8 586x321x8 586*421*8 586*621*8
G4 filter (filter box accessory)
Quantity - 2 2 2 2
Dimensions ( LxWxth) (mm) - 486x264x48 586x314x48 586*414*48 586*614*48
Condensate pump (accessory) (type) Centrifugal
Water flow - lift height (l/h - mm) 24 - 500
Not available for FWD30 and FWD45
Sound level (L/M/H speed)
Sound pressure level (5) (dB(A)) 36/40/43 38/41/44 46/50/53 47/52/57 47/52/58
Sound power level (5) (dB(A)) 46/50/53 48/51/54 56/60/63 57/62/67 57/62/68
Unit dimensions
Width x Depth (mm) 890 x 600 1090 x 710 1290 x 820 1290 x 970 1290 x 1090
Height (mm) 250 300 350 450 650
Shipped unit dimensions
Width x Depth (mm) 933 x 644 1133 x 754 1333 x 864 1333 x 1008 1333*1133
Height (mm) 260 310 360 460 660
Weight (kg) 32 46 61 76 118
Colour galvanised steel
Recommended fuse size
Unit alone (aM/gI) (A) 8/16 8/16 8/16 8/25 8/25
Unit with electric heater (gI) (A) 16 (2kW),25 (4kW) 40 (230V),3*16 (400V) 3*20 3*25 3*25
(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
Installation – Mechanical
The minimum volume can be determined by using the
following formula:
Volume = Cooling capacity x Time x highest capacity step
(%) / Specific heat / Dead band
Minimum operating time = 120 seconds
Specific heat = 4.18 kJ / kg
Average Dead band = 3°C (or 2°C)
Note: To estimate the biggest step, it is usually
more reliable to make a selection at lower ambient
temperature where efficiency is higher and compressors
steps bigger. It is also essential to take into account the
brine specific heat, in case of the use of glycol.
Process applications will need more water volume to
minimize the water temperature fluctuation at part load.
Table 3 - Minimum water volumes for comfort applications
Unit Size Capacity (KW) Biggest Step (%)
Minimum Water
Volume (l) Dead
band = 2 °C
Minimum Water
Volume (l) Dead
band = 3 °C
15 42 50 301 201
17 48 57 393 262
20 58 50 416 278
23 65 56 522 348
26 74 50 531 354
30 82 50 589 392
36 94 33 445 297
39 107 33 507 338
45 123 33 583 388
35 96 33 455 303
40 114 25 409 273
46 126 28 506 338
52 143 25 513 342
60 160 25 574 383
Expansion tank (option)
The factory-installed expansion tank initial pressure
should be adjusted about 0.2 bar lower than the static
pressure of the circuit at the pump inlet. The expansion
tank volume has been selected for typical loop volume.
It is recommended to check the expansion tank volume
with the installation information.
The following data is required:
- C = Water capacity of the circuit
- e = Expansion coefficient (difference between max and
min water temperature, in operation or not)
- Pi = Initial pressure of the expansion tank
- Pf = Final pressure: Max is given by the pressure relief
valve
Minimum Volume of expansion tank = (C x e)/(1-Pi/Pf)
Expansion coefficient of water at various temperatures
°C e
0 0.00013
10 0.00027
20 0.00177
30 0.00435
40 0.00782
50 0.01210
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