Corporate Office: 724.584.5500
Instant Access 24/7 (Parts and Service): 800.458.1960
Parts and Service
:
814.437.6861
35
Oil Charge Determination
The chiller is factory charged with the amount of oil
required by the chiller only and not the total system.
The amount of oil required is dependent upon the
amount of refrigerant added to the system for the
field-installed piping. Use the following to determine
the amount of oil needed for the system.
Pints of Oil = Pounds of refrigerant added to the
system / 100
Check the oil level after the chiller has run for 15
minutes.
Setting Condenser Fan Controls
Depending on the number of condenser fans
present there will be different fan cycling pressure
control setting requirements. It is important that
these settings be correct in order to maintain proper
capacity control and operation of the system. Each
refrigerant circuit has a separate head-pressure
control circuit. Refer to Table 12 for the proper
pressure settings.
Table 12 - Condenser Fan Pressure Settings (psig)
Stage
Number
Setting
Number of Fan Stages
1
2
3
4
5
6
Stage 1
Max Speed 410 410 410 410 410 410
Min Speed 320 320 320 320 320 320
Stage 2
Fan On
365 365 365 365 365
Fan Off
330 330 330 330 330
Stage 3
Fan On
375 375 375 375
Fan Off
340 340 340 340
Stage 4
Fan On
385 385 385
Fan Off
350 350 350
Stage 5
Fan On
395 395
Fan Off
360 360
Stage 6
405
370
Note: Dual circuit condensers have two separate head-pressure
controls circuits.