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Periodic Maintenance
Overview
This section describes preventative maintenance
procedures and intervals. Use a periodic maintenance
program to ensure optimal performance and efficiency
FWD
of the units. An important aspect of the chiller
Power supply
Capacities
maintenance program is the regular completion of the
Cooling capacity on water (1)
"Operating Log " . When filled out properly the completed
Heating capacity on water (2)
logs can be reviewed to identify any developing trends in
Fan motor
the chiller's operating conditions.
Fan power input (3)
Current amps (3)
Start-up amps
Weekly Maintenance and Checks
Air flow
minimum
After the unit has operated for approximately 30 minutes
nominal
maximum
and the system has stabilized, check the operating
Main coil
conditions and complete the procedures below:
Water entering/leaving connections
• Log the chiller.
Electric heater (accessory for blower only)
• Check evaporator and condenser pressures with gauges
Electric power supply
Heating capacity
and compare to the reading on the Clear Language
Hot water coil (accessory for blower only)
Display. Pressure readings should fall within the
Heating capacity (4)
following ranges specified in the Operating Conditions.
G2 filter (filter box accessory)
Quantity
Dimensions ( LxWxth)
G4 filter (filter box accessory)
Quantity
Dimensions ( LxWxth)
Table 4 – Operating Conditions at Full Load R1234ze
Condensate pump (accessory)
Water flow - lift height
Description
Not available for FWD30 and FWD45
Sound level (L/M/H speed)
Evaporator pressure
Sound pressure level (5)
Sound power level (5)
Condensing pressure
Unit dimensions
Width x Depth
Discharge superheat
Height
Subcooling
Shipped unit dimensions
Width x Depth
Height
Weight
Colour
All conditions stated above are based on the unit running
Recommended fuse size
fully loaded, running at conditions indicated above. If full
Unit alone (aM/gI)
Unit with electric heater (gI)
load conditions can not be met, refer to note below to
trim the refrigerant charge
(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
Note: entering condenser water: 30°C and entering
(3) At high speed with nominal air flow.
evaporator water: 12°C.
(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
38
Technical Data
NOTE: Optimum condenser pressure is dependent on
condenser water temperature, and should equal the
saturation pressure of the refrigerant at a temperature 1
to 3°C above that of leaving condenser water at full load.
08
Monthly Maintenance and Checks
(V/Ph/Hz)
(kW)
5,2
• Review operating log.
(kW)
6,3
• Clean all water strainers in both the chilled and
(type)
(kW)
0,23
condensing water piping systems.
(A)
1,1
• Measure the oil filter pressure drop. Replace oil filter if
(A)
3,2
required. Refer to "Service Procedures " .
(m
/h)
490
3
• Measure and log the subcooling and superheat.
(m
/h)
820
3
(m
/h)
980
3
• If operating conditions indicate a refrigerant shortage,
leak check the unit using soap bubbles.
(type)
(Dia)
3/4"
• Repair all leaks.
• Trim refrigerant charge until the unit operates in the
(V/Ph/Hz)
230/1/50
(kW)
2/4
conditions listed in the note below.
(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
Condition
3.5 bar
38/41/44
46/50/53
48/51/54
56/60/63
9.4 bar
1090 x 710
1290 x 820
3K
300
350
5K
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-SVX023A
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