General; Routine Maintenance; Troubleshooting Introduction - Sullair ES-8 Operator's Manual And Parts List

10.1 GENERAL

As you proceed in reading this section, it will be
easy to see that Maintenance Program for the dryer
is quite minimal. The use of service indicators will
alert you when service maintenance is required.
Checks on the dryer on a regular basis will help in-
sure that all items are functioning properly.

10.2 ROUTINE MAINTENANCE

Check automatic condensate traps on a regular
basis to insure that they are operating properly or
the emulsion will back up into the compressed air
system. Proper drain trap and valve maintenance
is the owners responsibility and is not covered by
the warranty.
The condenser fins may need to be periodically
cleaned to remove dust, lint, etc., to assure efficient
heat transfer. High head pressure or a visual check
will determine the need for cleaning.
Check the gauge readings periodically for good
10.4 TROUBLESHOOTING -- DRYER
SYMPTOM
UNIT DOES NOT RUN
HEAD PRESSURE TOO HIGH
AND TROUBLESHOOTING
system operation.
10.3 TROUBLESHOOTING INTRODUCTION (DRY-
ER)
Before working on the refrigerant system, read the
Safety Section 1.3 pertaining to pressure.
The dryer consists of three basic systems: Air, Re-
frigerant, and Electrical. An air leak at 100 psig (6.9
bar) will provide an audible signal indicating where
there is a problem; R---22 has no color or odor,
therefore a small refrigerant leak is difficult to find.
However, it can be detected by a bubble test, halide
torch (with a flame which changes from red---
orange to blue on contact with refrigerant) or an
electrical detector.
The electrical system consists of transformers,
starters, switches, relays, etc. The use of a volt ---
ohm meter or similar equipment is required for
checking continuity, amperage and voltage.
PROBABLE CAUSE
No Line Voltage
Improperly Wired
Breaker Fuse or Tripped Circuit
Breaker
Refrigerant Overcharge
Condenser Fouled and Dirty
Defective Fan Control Switch
Defective Fan Motor
Dryer Location Too Hot
(high ambient)
Compressed Air Leaks to Refrigerant
DRYER MAINTENANCE
REMEDY
Follow wiring diagram and check voltage from
compressor terminal to the power source to find
where the circuit was interrupted.
Inspect electrical components such as switches,
controls, motors, transformers, etc.
The supply power voltage, frequency and phase
must coincide with unit's nameplate.
Check wiring against wiring diagram and tighten
any loose connection.
Check for amperage draw of unit.
Excess refrigerant; check unit's nameplate for total
system refrigerant charge.
Refrigerant overcharge may cause system not to
perform properly and efficiently.
Dismantle and clean condenser.
Clogged fins in air--- cooled condenser will reduce
heat transfer efficiently. Fins should be periodically
checked and cleaned.
Fan control cuts in at 215 psig (14.8 bar) and cuts
out at 170 psig (11.7 bar). Replace.
Replace.
Cool ambient or relocate the unit (see Section 4.2
Mounting of Integral Compressor/Dryer).
Evacuate, repair leak and recharge with refrigerant.
System.
Repair or replace evaporator.
Section 10
39