RLC-SVX023A
30
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
Operating Principles Mechanical
Compressors
The compressor used by the chiller consists of 3 distinct
sections: the motor, the rotors and the bearing housing.
Compressor Motor
A two-pole, hermetic, squirrel-cage induction motor
directly drives the compressor rotors. The motor is
cooled by suction vapor drawn from the evaporator
and entering the end of the motor housing through
the suction line.
Compressor Rotors
Each chiller uses a semi-hermetic, direct-drive Helical-
Rotary type compressor. Excluding the bearings, each
compressor has only 3 moving parts: 2 rotors - “male”
and “female” - provide compression, and a slide valve
that controls capacity. The male rotor is attached to, and
driven by, the motor, and the female rotor is, in turn,
driven by the male rotor. Separately housed bearing
sets are provided at each end of both rotors. Female and
male unloader piston moves along the respective rotor.
The helical-rotary compressor is a positive displacement
device. Refrigerant from the evaporator is drawn into
the suction opening at the end of the motor section.
The gas is drawn through a suction strainer across
the motor, cooling it, and then into the rotor section.
It is then compressed and discharged directly into the
discharge line.
There is no physical contact between the rotors and
compressor housing. Oil is injected through adequate
ports, coating both rotors and the compressor housing
interior. Although this oil does provide rotor lubrication,
its primary purpose is to seal the clearance spaces
between the rotors and compressor housing. A positive
seal between these internal parts enhances compressor
efficiency by limiting leakage between the high pressure
and low pressure cavities.
Capacity control is accomplished by means of male and
female unloader piston.
Slide Valve movement
Slide valve operates coordinated with AFD. Tracer UC800
algorithm controls the compressor capacity with higher
slide valve capacity and lower AFD frequency to get
higher efficiency
This loading/unloading schema is a general figure, it
could be different in case of sudden modifications of
the operating data. Also it has not to be considered as a
starting/stopping mode.
Loading
Slide Valve
AFD
30 Hz
50 Hz
60%
Capacity
100%
Capacity
Unloading
60%
Capacity
100%
Capacity
Above 71.1°C condenser saturated temperature in order
to allow sufficient motor cooling there is no possibility to
decrease frequency below
- 50Hz for sizes 050 to 090
- 60Hz for sizes 100 and 110
