Startup Procedure; Shut-Down Procedure - Gardner Denver GSRN Series Instruction Manual

STARTUP PROCEDURE

GSRN-20A through GSRN-200A
Energize the refrigeration compressor by placing the "on/off" dryer switch with indicating light to the "on (I)"
position. The refrigerant compressor and fan motor will begin to operate. The suction/analyzer gauge will
fall to a range of 28-35 PSIG. If the suction/analyzer gauge is not in the specified range, contact your local
distributor.
REQUIRE AN 8 HOUR CRANK CASE WARMUP PRIOR TO STARTUP
To prevent equipment damage the unit must have primary power applied with the "on/off"
switch in the "OFF (0)" position for no less than 8 hours. This energizes the crank case heater
to allow any liquid refrigerant in the crankcase to be vaporized prior to startup. Energizing
the dryer prior to crank case heating can "wash away" compressor lubricants and will cause
premature compressor failure.
GSRN-250A through GSRN-2250A
Energize the refrigeration compressor by placing the "on/off" dryer switch with indicating light to the "on (I)"
position. The refrigerant compressor and fan motor will begin to operate. The suction/analyzer gauge will
fall to an upper (RF) orange pie range of 73-82 PSIG and the discharge gauge will raise to a range of 190
to 382 PSIG. These units are equipped with condenser fan cycle controls and operate independent of the
compressor. Each fan is controlled via a refrigeration discharge pressure switch (260-200 PSIG) for single
fan units and (290-240 PSIG) for two fan units. If the suction/analyzer or discharge gauge is not in the
specified range, contact your local distributor.
GSRN-100W through GSRN-200W
The water-cooled series GSRN-100W through GSRN-200W utilizes a city or tower fluid supply. The unit is
supplied with a water-regulating valve at the outlet of the refrigeration condenser. This valve modulates
water flow to maintain a stable refrigerant discharge pressure of 125-145 PSIG. If the refrigeration
discharge pressure maintains a pressure above or below this setting, adjustments will be required to the
water-regulating valve. Contact your local distributor.
GSRN-250W through GSRN-2250W
The water-cooled series GSRN-250W through GSRN-2250W utilizes a city or tower fluid supply. The unit
is supplied with a water-regulating valve at the outlet of the refrigeration condenser. This valve modulates
water flow to maintain a stable refrigerant discharge pressure of 250-275 PSIG. If the refrigeration
discharge pressure maintains a pressure above or below this setting, adjustments will be required to the
water-regulating valve. Contact your local distributor.
SHUT DOWN PROCEDURE
When the dryer is to be shut down for service, maintenance, or other reasons switch the dryer off by placing
the "on/off" dryer switch with indicating light to the "OFF (0)" position. If service or maintenance is required
disconnect and lockout the main power supply, isolate and depressurize the internal compressed air
pressure to atmosphere prior to commencement of any work.
If the shutdown resulted in loss of main power interruption, repeat start up procedure so crank
case heater has time to raise the crank case temperature.
GSRN-250-2250 or any 3-Phase powered unit
GSRN10-2250A-SM
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