Start-Up & Operation - Quincy QGB Series Instruction Manual

Section V - Integrated Dryer (option)
Start-up & Operation
The non-cycling design of the refrigerated
dryer assures proper dew point control
at all load conditions. The refrigerant
compressor runs continuously when the
dryer is "ON". All dryers are installed
with fan cycling switch. These fans will
cycle with respect to the load changes,
ambient temperature fluctuations, and the
cleanliness of the condenser. Standard
units are designed to operate under the
following conditions:
1) Inlet Air Temperature - 100°F design
120°F maximum
2) Inlet Air Pressure - 100 PSIG design
175 PSIG maximum
3) Ambient Air Temperature - 40°F
minimum 110°F maximum
notiCe!
At temperatures above the 100°F
design, refrigeration capacity will
decrease. Operating air pressures
below the 100 PSIG design will reduce
system capacity.
Start-up Procedure
Air dryers with three-phase power supply
are equipped with a compressor crankcase
heater. This heater must be energized by
closing the disconnect switch or circuit
breaker a minimum of 6 to 10 hours before
start-up. Power to the air dryer can be left
on to energize the crankcase heater for
the off-cycle, during evening or weekend
shutdowns.
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STARTING THE DRYER WITHOUT
E N E R G I Z I N G T H E C R A N K C A S E
HEATER WILL CAUSE PREMATURE
FAILURES OF THE REFRIGERANT
COMPRESSOR. Failure to comply with
procedure of energizing crankcase
heater before start-up may void
warranty.
Operating Range & Control Settings
(R-134a refrigerant)
1) Suction Pressure: 25 to 33 PSIG
2) Discharge Pressure: 100 to 160 PSIG
3) Low Pressure Switch: CUT OUT: 20
PSIG CUT IN: 45 PSIG
4) High Pressure Switch: 250 PSIG
5) Fan Control: CUT OUT: 110 PSIG
CUT IN: 150 PSIG
Shutdown Procedure
Turn the power switch to the OFF position.
Contact factory before authorizing any
warranty refrigeration service on the air
dryer. Identify the dryer by model and
serial numbers when calling factory.
Quincy Compressor-QGB
Caution!
Caution!
™