Table of Contents
Advertisement
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
FWD
Power supply
A two-pole, hermetic, squirrel-cage induction motor
Capacities
directly drives the compressor rotors. The motor is
Cooling capacity on water (1)
cooled by suction vapor drawn from the evaporator
Heating capacity on water (2)
Fan motor
and entering the end of the motor housing through
Fan power input (3)
the suction line.
Current amps (3)
Compressor Rotors
Start-up amps
Air flow
Each chiller uses a semi-hermetic, direct-drive Helical-
minimum
nominal
Rotary type compressor. Excluding the bearings, each
maximum
compressor has only 3 moving parts: 2 rotors - "male"
Main coil
and "female" - provide compression, and a slide valve
Water entering/leaving connections
that controls capacity. The male rotor is attached to, and
Electric heater (accessory for blower only)
driven by, the motor, and the female rotor is, in turn,
Electric power supply
driven by the male rotor. Separately housed bearing
Heating capacity
sets are provided at each end of both rotors. Female and
Hot water coil (accessory for blower only)
Heating capacity (4)
male unloader piston moves along the respective rotor.
G2 filter (filter box accessory)
The helical-rotary compressor is a positive displacement
Quantity
device. Refrigerant from the evaporator is drawn into
Dimensions ( LxWxth)
G4 filter (filter box accessory)
the suction opening at the end of the motor section.
Quantity
The gas is drawn through a suction strainer across
Dimensions ( LxWxth)
the motor, cooling it, and then into the rotor section.
Condensate pump (accessory)
Water flow - lift height
It is then compressed and discharged directly into the
Not available for FWD30 and FWD45
discharge line.
Sound level (L/M/H speed)
There is no physical contact between the rotors and
Sound pressure level (5)
Sound power level (5)
compressor housing. Oil is injected through adequate
Unit dimensions
ports, coating both rotors and the compressor housing
Width x Depth
interior. Although this oil does provide rotor lubrication,
Height
Shipped unit dimensions
its primary purpose is to seal the clearance spaces
Width x Depth
between the rotors and compressor housing. A positive
Height
seal between these internal parts enhances compressor
Weight
Colour
efficiency by limiting leakage between the high pressure
Recommended fuse size
and low pressure cavities.
Unit alone (aM/gI)
Capacity control is accomplished by means of male and
Unit with electric heater (gI)
female unloader piston.
(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
30
Technical Data
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
08
(V/Ph/Hz)
This loading/unloading schema is a general figure, it
could be different in case of sudden modifications of
(kW)
5,2
(kW)
6,3
the operating data. Also it has not to be considered as a
(type)
starting/stopping mode.
(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
Above 71.1°C condenser saturated temperature in order
(kW)
2/4
to allow sufficient motor cooling there is no possibility to
decrease frequency below
(kW)
6,3
- 50Hz for sizes 050 to 090
2
- 60Hz for sizes 100 and 110
(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
230/1/50
8,3
11,9
2 x direct drive centrifugal
0,46
2,2
5,5
Slide Valve
980
1650
Loading
1970
Unloading
ISO R7 rotating female
3/4"
230/1/50 or 400/3/50
400/3/50
8
12
2
486x271x8
586x321x8
2
486x264x48
586x314x48
Centrifugal
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
AFD
30 Hz
50 Hz
1400
1800
60%
100%
2300
3000
Capacity
Capacity
2600
3600
60%
100%
Capacity
Capacity
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
24 - 500
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-SVX023A
45
30,1
38,2
1,51
5,5
16,5
2700
4500
5400
1 1/2"
12
34,5
2
2
650
660
118
8/25
3*25
Hide quick links:
Advertisement
Table of Contents
