Ingersoll Rand DXR Serie Manual De Instrucciones página 16

PROBLEM SYMPTOM(S)
Water
Refrigerant discharge
downstream of
temperature higher than
dryer
250°F.
(Continued).
Inlet air temperature
lower than 40°F.
High pressure Excessive airflow (may
drop across also cause water down-
dryer. stream of dryer).
Dryer icing up.
High pressure Intermediate air
drop across temperature below
dryer. 32°F.
Intermediate air
temperature too high.
Frosting of compressor
or no cooling.
Refrigerant suction
High suction
temperature too high.
temperature.
Refrigerant discharge
temperature higher than
220°F. Refrigerant suc-
tion temperature higher
than 65°F.
Intermediate
air High suction
temperature temperature.
too high.
Valve continuously
venting.
No
condensate
Valve not cycling
from automatic
drain valve.
No response when test
button is pushed
Digital display Display blank
not working
Drain not working or
drain cycling fast
1-14
POSSIBLE CAUSE
1. Condenser fouled or clogged.
2. Fan motor inoperative (air-cooled
condensers only).
3. Incorrect fan cycling switch set-
ting (air-cooled condensers only).
4. Inlet air temperature too high.
5. High ambient temperature.
6. Incorrect water valve adjustment
(water-cooled condensers only).
Low ambient temperature.
Dryer improperly sized.
Suction temperature lower than
32°F.
Dryer icing up.
1. Loss of refrigerant charge. Re-
frigerant compressor cycles on low
pressure control.
2. Refrigerant filter/dryer plugged
up.
Water in refrigeration system. Leak
in chiller or water-cooled con-
denser.
1. Loss of refrigerant charge. Re-
frigerant compressor cycles on low
pressure control.
2. Refrigerant filter/dryer plugged
up.
1. Clogged diaphragm.
2. Short in electrical component.
1. No electrical power.
2. Timer malfunction.
3. Solenoid coil malfunction.
4. Clogged ports.
1. No electrical power.
2. Timer malfunction.
Temporary loss of power
REMEDY
1. Clean or replace condenser.
2. Replace fan motor.
3. Consult your local distributor.
4. Check temperature of inlet air. Reduce to
design conditions.
5. Ventilate area.
6. Adjust water valve to 210 psig. To de-
crease the pressure, turn the slotted square
extension on the water regulating valve (at
the compressor inlet) clockwise, increasing
the water flow. To increase the pressure,
turn the extension counterclockwise.
Turn off dryer until ambient temperature ex-
ceeds required pressure dew point.
Check airflow and dryer capacity (see Table
8). Reduce airflow or resize and replace
dryer.
Adjust HGBV clockwise to raise to 33°F. By-
pass the dryer while adjusting.
1. Adjust operating conditions to meet siz-
ing conditions.
2. Adjust HGBV to raise suction temperature
to the level listed in the Refrigerant Flow
section.
1. Locate leak. Repair and recharge.
2. Replace filter/dryer.
Locate leak. Repair leak or replace chiller or
condenser.
1. Locate leak. Repair and recharge.
2. Replace filter/dryer.
1. Clean diaphragm.
2. Check and replace connector or timer as-
sembly.
1. Check and correct power supply and
connections.
2. Replace timer assembly.
3. Replace solenoid coil.
4. Clean ports. Clean strainer (if equipped)
1. Check and correct power supply and
connections.
2. Replace timer assembly.
Stop unit for 10 minutes; then restart.
DXR Series Dryers (Bulletin 553)