RLC-SVX023A
32
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
Oil Management System
Oil Separator
The oil separator consists of a vertical tube, joined
at the top by the refrigerant discharge line from the
compressor. This causes the refrigerant to swirl in the
tube and throws the oil to the outside, where it collects
on the walls and flows to the bottom. The compressed
refrigerant vapor, stripped of oil droplets, exits out
the top of the oil separator and is discharged into the
condenser.
Oil that collects in the bottom of the oil separator at
condensing pressure during compressor operation;
therefore, oil is constantly moving to lower pressure
areas.
Oil Flow Protection
Oil flow and quality is proven through a combination of a
number of sensors, most notably a pressure transducer.
If for any reason oil flow is obstructed because of a
plugged oil filter, closed service valve, faulty master
solenoid, or other source, the oil pressure transducer will
read an excessively high pressure drop in the oil system
(relative to the total system pressure) and shut down
the chiller.
To ensure the required system differential pressure
is adequate to move oil to the compressor, the Tracer
UC800 attempts to both control a minimum system
differential pressure as well as monitor it. Based
on readings from pressure transducers in both the
evaporator and condenser. Once the minimum is met,
the EXV will return to normal liquid level control (see
the paragraph on “Cycle Description”). If the differential
is significantly lower than required, the unit will trip
and initiate appropriate diagnostics and would enforce
a compressor “cool down” period. To ensure proper
lubrication and minimize refrigerant condensation in the
oil sump, heaters are mounted on the bottom of the oil
sump. An auxiliary contact of the compressor starter,
energizes these heaters during the compressor off cycle
to maintain a proper elevation of the oil temperature.
The heater element is continuously energized while the
compressor is off and does not cycle on temperature.
Oil Filter
All chillers are equipped with replaceable-element oil
filters. Each removes any impurities that could foul
the compressor internal oil supply galleries. This also
prevents excessive wear of compressor rotor and
bearing surfaces and promotes long bearing life. Refer
to maintenance section for recommended filter element
replacement intervals.
Compressor Rotor Oil Supply
Oil flowing through this circuit enters the compressor
rotor housing. From there it is injected along the rotors
to seal clearance spaces around the rotors and lubricate
the contact line between the male and female rotors.
Lubricant Recovery
Despite the high efficiency of the oil separators, a small
percentage of oil will get past them, move through the
condenser, and eventually end up in the evaporator. This
oil must be recovered and returned to the oil separator.
The function of oil return is accomplished by the BPHE
that will push the oil with the evaporated refrigerant
through the suction line to the compressor.
Oil Cooler
The oil cooler is a brazed plate heat exchanger designed
to transfer 3.5 kW of heat from the oil to the suction
side of the system. Subcooled liquid is the cooling
source. The oil cooler is required on units running at
high condensing or low suction temperatures. The high
discharge temperatures in these applications increase
oil temperatures above the recommended limits for
adequate lubrication and reduce the viscosity of the oil.
Operating Principles Mechanical
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