Disassembling The Unit; Refrigerant Leaks In The Refrigeration Circuit; Refrigerant Charging; Characteristics Of Refrigerant R134A - Ingersoll-Rand IRN 20HP Operation And Maintenance Manual

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MAINTENANCE
1. Stop compressor, lock and tag out machine.

DISASSEMBLING THE UNIT

The unit has been designed and constructed to guarantee continuous
operation.
The long service life of some components such as the fan and
compressor depends on good maintenance.
The unit must only be disassembled by a refrigerant specialist.
Refrigerant liquid, refrigeration components and lubricating oil inside
the refrigeration circuit must be recovered in compliance with current
norms in the country where the machine is installed.
RECYCLING DISASSEMBLY
Frame and panels
Heat exchanger (cooler)
Pipes
Insulation
Compressor
Condenser
Refrigerant
Valve
en
Steel / epoxy resin polyester
Stainless steel
Copper
Gum synthetic
Steel / copper / aluminium / oil
Aluminium
R134a
Steel

REFRIGERANT LEAKS IN THE REFRIGERATION CIRCUIT

The unit is despatched in perfect working order, already charged.
Refrigerant leaks may be identified by tripping of the refrigeration
overload protector .
IF A LEAK IS DETECTED IN THE REFRIGERANT CIRCUIT, SEEK
TECHNICAL ASSISTANCE.

REFRIGERANT CHARGING

THIS OPERATION MUST ONLY BE PERFORMED BY A
REFRIGERANT SPECIALIST.
WHEN REPAIRING THE REFRIGERANT CIRCUIT, COLLECT ALL
THE REFRIGERANT IN A CONTAINER AND DISPOSE OF IT IN
THE APPROPRIATE MANNER.

CHARACTERISTICS OF REFRIGERANT R134A

In normal temperature and pressure conditions the above refrigerant
is a colorless, class A1/A1 gas with TVL value of 1000ppm (ASHRAE
classification).
If a refrigerant leak occurs, thoroughly air the room before commencing
work.
TROUBLESHOOTING
TROUBLE CAUSE
Solenoid 1. Debris in solenoid
condensate valve prevents
valve will not diaphragm from
close. seating.
2. Short in electrical
component.
Drain timer will 1. No electrical
not operate. supply.
2. Timer malfunction
3. Clogged port.
4 Solenoid valve
malfunction.
5. Clogged strainer.
MAINTENANCE
Periodically clean the screen inside the valve to keep the drain
functioning at maximum capacity. To do this, perform the following
steps:
1. Close the strainer ball valve completely to isolate it from the air
receiver tank.
2. Press the TEST button on the timer to vent the pressure remaining
in the valve. Repeat until all pressure is removed.
CAUTION! High pressure air can cause injury from flying debris.
Ensure the strainer ball valve is completely closed and pressure
is released from the valve prior to cleaning.
3. Remove the plug from the strainer with a suitable wrench. If you hear
air escaping from the cleaning port, STOP IMMEDIATELY and repeat
steps I and 2.
4. Remove the stainless steel filter screen and clean it. Remove any
debris that may be in the strainer body before replacing the filter screen.
5. Replace plug and tighten with wrench.
6. When putting the Electric Drain Valve back into service, press the
TEST button to confirm proper function.
ACTION
1. Remove solenoid
valve, disassemble,
clean and reassemble.
2. Check and replace
power cord or timer as
needed.
1. Apply power.
2. Replace timer.
3. Clean valve.
4. Replace solenoid
valve.
5. Clean strainer.
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