Adv Adjustment; Start-Up; Shutdown - Ingersoll-Rand DXR Series Operator's Instruction Manual

Press and hold the TIME ADJUST button. Release the
button when the display reads the desired time. The se-
lected time will be locked into memory.

ADV Adjustment

To minimize air losses, the ADV timer should be ad-
justed to open the drain port just long enough to dis-
charge accumulated condensate. Set the timer so that
only air discharges at the end of the open period. Rec-
ommended initial settings are a 3-second drain opening
and a 3-minute drain closed time (cycle). The separator
or filter bowl is likely to fill with water if the drain cy-
cle is too long. If liquid discharges as the port is closing,
set the timer for a shorter cycle or a longer opening.

START-UP

Follow the procedure below to start your dryer. Failure
to follow the prescribed start-up procedure will invali-
date the warranty. If problems arise during start-up, call
your local distributor.
Before you start the dryer:
1. Turn off the dryer ON/OFF switch.
2. Verify the main electrical supply voltage matches
the voltage specified on the dryer data plate.
3. Turn on the main electrical power to the dryer.
The crankcase heater is wired to be on when power
is supplied to the dryer. The crankcase heater
must be warmed up for 4 hours before starting
the dryer. This warm-up heats the compressor
oil and boils off liquid refrigerant to prevent
damage to the compressor.
During the warm-up period:
• Do not turn the dryer switch on.
• Compressed air may flow through the dryer dur-
ing warm-up but drain valves will not be func-
tional.
After the main electrical power to the dryer has
been on for 4 hours, the dryer may be started.
To start the dryer:
1. Turn the power switch to ON. The refrigerant com-
pressor will turn on. The monitor will turn on and
the CHECK OPERATING CONDITIONS indica-
tor may turn on. If the dryer does not start in this
way, call your local distributor.
2. Confirm that condensate is discharging from the
automatic drain valves and that the condensate
lines from the automatic drain valve discharge into
1-8
a collection tank or an environmentally-approved
disposal system.
3. Check ADV timing. See Automatic Drain Valve
section for ADV adjustment procedure.
4. Check customer-supplied circuit breakers or fuses.
Reset or replace as required.
5. Check proper connection and support of com-
pressed air lines to the dryer; check bypass valving
system, if installed.
6. Ensure adequate ventilation for air-cooled dryers.
7. For water-cooled models, verify the water supply is
connected to the water regulating valve on the con-
denser. Confirm that the cooling water supply
meets the required flow and temperature (see Table
1).
8. Confirm that the inlet air temperature, pressure and
airflow to the dryer meet the specified requirements
(see Tables 8 and 9).
9. After 30 minutes of operation, check the CHECK
OPERATING CONDITIONS indicator. If this in-
dicator is lit, turn the dryer off and call your local
distributor.
10. If the CHECK OPERATING CONDITIONS indi-
cator has turned off after 30 minutes of operation,
check the following temperatures on the System
Operation Monitor:
• Refrigerant discharge (head) temperature should
be within the range of 140°F to 220°F.
• Refrigerant suction temperature should be within
the range of 32°F to 55°F.
If either temperature is out of range, see the Field
Service Guide for correction.
The dryer is designed to run continuously. Let the dryer
run even when the demand for compressed air is inter-
rupted; the dryer will not freeze up. If the supply power has
been turned off for more than four hours, supply power to
the dryer; warm up the crankcase heater (if applicable) for
4 hours before starting the dryer to vaporize any accumu-
lated liquid refrigerant from the compressor oil.

SHUTDOWN

When the dryer must be shut down for maintenance or
other reasons, use the following procedures.
If electrical repairs must be made:
1. Turn off the power switch.
2. Disconnect the main power supply.
DXR Series Dryers (Bulletin 553)