Ingersoll-Rand NIRVANA IRN75-160K-2S - Manual (Page 91)

IRN37 - 160K - CC & IRN50 - 200H & IRN75 - 160K - 2S & IRN - 100 - 200H - 2S & IRN 250 - 300H - 2S
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10.0 MAINTENANCE
Watercooled machines
Shut off the cooling water.
The machine should trip at 109° C (228° F).
CAUTION
Under no circumstances should these discharge
temperatures be exceeded. If the machine fails to
trip A FAULT EXISTS. Investigate immediately.
Separator tank scavenge check valve/orifice
Disconnect tubing at each end of check valve/
screen/ orifice assembly.
Check orifice and clean if required. Use suitable tool
and remove orifice from its housing. Be careful not to
damage flared end of fitting or O−ring.Wash housing
in safety solvent and blow dry.
Press the check valve/orifice into fitting block.
Assemble the check valve/orifice assembly to the
tubing lines.The fitting must be re−installed with the
check valve on the upstream side of the orifice as
indicated by the flow arrow.
Blower / fan Motor Bearing Maintenance
(Stored units)
Prior to placing a unit in storage for extended
intervals, rotate the blower motor several revolutions
by hand in the direction of rotation.
On N75 − 160, N250 − 300H aircooled units, whilst
rotating the motor, pump grease into the bearing
until grease is seen at the relief port.
Thereafter rotate the motor as described above
every three months until such time as the unit is
placed in service.
If the storage time is to exceed a total of nine (9)
months duration, the compressor must be ordered
for long term storage.
Motor cowl cleaning N75−160 units only
Ensure compressor is electrically isolated for at least
15 minutes before commencing any maintenance
work.
Remove panels from the compressor.
Using a clean dry cloth, remove dust from the
surface of the motor cowl and ensure all ventilation
slots are free of obstructions.
Replace panels to the compressor.
Drive Box Filter Removal / Replacement
Ensure compressor is electrically isolated for at least
15 minutes before commencing any maintenance
work.
Unclip the front grill of the drive box filter.
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Remove the filter pad from the housing and replace
with a new filter pad from Ingersoll Rand.
Replace front grill to the drive box filter.
Moisture Separator Check / Cleaning
Ensure compressor is electrically isolated for at least
15 minutes, before commencing any maintenance
work.
Isolate the compressor from the system and fully
discharge the compressed air within the unit.
Remove plastic tube from the fitting located on the
bottom of the moisture separator.
Remove the bowl of the moisture trap, clean and
replace.
Condensate (Moisture) Drain Valve / Trap
Ensure compressor is electrically isolated for 15
minutes and all pressure is relieved from system.
Remove all pipes going to and from the valve (or
trap).
Disconnect any electrical cables to the valve (or trap).
Determine the type of condensate drain device and
continue in the appropriate section below:−
Timed Solenoid Drain Valves (where fitted) Check /
Cleaning
Remove the central nut and then the electrical coil.
Remove screws holding bonnet of valve and carefully
split the valve. Clean and inspect all internal parts.
Similarly check and clean the ball valve and needle
valve.
Replace any defective parts as identified in parts
manual.
Re−assemble and later, with machine running, check
that condensate and air is expelled at frequency
and duration set into the INTELLISYS controller (see
section 9.6).
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