Maintenance - Deltech SPX FLOW Manual

MCGUIRE AIR COMPRESSORS INC

MAINTENANCE

The dryers require little maintenance for satisfactory opera-
tion. Good dryer performance can be expected if the following
routine maintenance steps are taken.
Dismantling or working on any component of the
compressed air system under pressure may cause equipment
failure and serious personal injury. Before dismantling any part
of the dryer or compressed air system, completely vent the
internal pressure to the atmosphere.
General
For continued good performance of your refrigerated dryer,
all refrigeration system maintenance should be performed by
a competent refrigeration mechanic.
NOTE: Before corrective maintenance is done during the war-
ranty period, call your local distributor and proceed according to
instructions. Refer to the warranty for limits of your coverage.
Daily Maintenance
Check the operation of the automatic drain valve at least once
daily. See the Field Service Guide for remedies to drain valve
malfunctions. See the AUTOMATIC DRAIN VALVE section for drain
valve adjustment.
Monthly Maintenance
For air-cooled models, it is recommended to inspect the con-
denser coils monthly. If necessary, remove dirt or other particles
with compressed air from an OSHA-approved air nozzle that
limits its discharge pressure to 30 psig (2.1 kgf / cm²).
For water-cooled models, clean strainer monthly, more often
if required. Shut off water, remove small plug to relieve pres-
sure, then remove large plug to remove strainer. Clean strainer
and replace.
Electronic Drain Valve Disassembly and Servicing
The valve body is attached to the valve strainer which is attached
to the heat exchanger vessel.
Do not disassemble drain valve timer or attempt
to repair electrical parts. Replace timer if defective.
The drain valve discharge condensate through a full-port drain
opening. The valve body may need to be cleaned under condi-
tions of gross particulate contamination.
To disassemble the drain valve body for cleaning and other
maintenance:
1. Turn power switch off.
2. Disconnect main power supply to dryer.
3. Depressurize unit.
4. Lock out and tag power supply in accordance with OSHA
requirements.
If power supply is not connected and unit is not
depressurized before disassembly, serious personal injury and
valve damage may result.
MCGUIRE AIR COMPRESSORS INC
5. Removes hoses that connect the drain valve to the drain
discharge fitting and remove the valve from the drain valve
strainer.
6. Remove screw and washer from front of the drain valve.
7. Remove the power supply connector and gasket (with the
timer assembly if attached) from the solenoid coil housing.
Do not damage or lose the gasket.
8. Remove coil fixing nut from top of solenoid coil housing.
9. Lift solenoid coil housing off solenoid core in valve body.
10. Unscrew solenoid core from valve body.
Once the drain valve is disassembled, the following maintenance
can be performed.
1. Inspect internal parts of valve body; clean or replace as
required.
NOTE: Replace solenoid valve if component damage is
observed.
2. Remove debris from valve body.
3. Wipe solenoid core components with a clean cloth or blow
out debris with compressed air from an OSHA-approved air
nozzle that limits its discharge pressure to 30 psig.
4. Check that the plunger assembly is clean and moves freely
in housing.
5. If timer is attached to valve body, check electrical continuity
across timer assembly.
To reassemble the drain valve, reverse the sequence of
the preceding steps. After the drain valve is reassembled,
connect the main power supply to the dryer.
When the dryer is returned to service, check the drain
valve for air or condensate leaks; tighten connections as
required to correct leaks. Check the drain cycle; adjust
the timer according to the procedure in the drain valve
adjustment section.
1-888-229-9999
1-888-229-9999
5