R90 - 160N / R90 - 160I / R90 - 160NE / R90 - 160IE
http://www.ingersollrandproducts.com
9
10.0 MAINTENANCE
High Airend Temperature Sensor checking procedure
It is recommended that the discharge temperature sensor
(2ATT) is checked regularly as follows:
Aircooled machines
Stop the cooling blower by opening the blower / fan mo-
tor circuit breaker.
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.
Motor cowl cleaning
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 (For VSD only)
Ensure compressor is electrically isolated for at least
15 minutes before commencing any maintenance
work.
Unclip the front grill of the drive box filter.
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 tube from the fitting located on the bottom
of the moisture separator.
Remove the bowl of the moisture trap, clean and
replace.
Package Pre-Filter (is washable with mild detergent)
To remove Pre-Filter element:-
Unlatch the two 1/4 turn latches and open intake
panel (panel is hinged)
Remove the Six (6) wing nuts
Remove filter grill
Pull out filter element
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To Install Pre-Filter element:-
Center element over package intake opening
Push filter over grill studs so that studs poke through
the filter media
Install filter grill
Install Six (6) wing nuts
Close intake panel and latch
No Loss Drain Trap (where fitted) Check / Cleaning
It is recommended to check the no loss drain trap
daily to insure that condensate is draining from
the moisture seperator system. To check for correct
function, press the test button on the unit and listen
for condensate / air passing through the drain. If
the drain is clogged, replace the no loss drain valve
service module. The service module consists of the
lower portion of the drain trap and is not servicable.
Additionally, it is recommended to replace the
service module every 8000 hours or once per year,
whichever comes first.
Fluid and Vibration Monitoring
Ingersoll Rand
recommends incorporating predictive
maintenance, specifically the use of coolant and vibration
analysis, into all Preventative Maintenance programs.
Predictive Maintenance is designed to increase system
reliability and prevent costly downtime. Through the
use of sophisticated diagnostic tools, including fluid,
vibration, and optional air analysis,
Ingersoll Rand
Certified Service Technicians can identify and correct
potential problems BEFORE they can cause expensive
unscheduled downtime.
How does predictive analysis work? By establishing an
initial baseline for normal operation, and then regularly
monitoring fluid and vibration conditions, any sudden
deviation or significant increase from this baseline can
be identified and investigated to pinpoint the cause.
More quickly diagnosing potential problems can directly
save money by preventing costly failures and reducing
or eliminating downtime. In addition, regular condition
monitoring also helps to maximize the time between
expensive preventative maintenance intervals, such as
component rebuilds and coolant changes.
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