MAHLE RTI TC640 - Manual (Page 14)

RTI Technologies, Inc.
September 15, 1997 Page 13
SCHEDULED MAINTENANCE
BEFORE EACH USE...
Check the oil level in the Compressor DAILY before using.
The Oil Level Sight Tube is visible through a cut-out in the left side of the
black Compressor Cover at the bottom of the TC640. The oil level should be
no higher than half way up in the nylon tube.
Add oil to the Compressor as follows:
1. Determine the correct amount of oil to add: Add 4.7cc of oil per 1mm
increase in level.
2. Turn both High and Low Side Gauges to OFF.
3. Press the top (ON) of the switch marked RECOVER/RECYCLE.
4. Add oil to Compressor through the capped fitting below the Oil Drain
Valve on the rear of the TC640. Use a standard oil injecting device or
simply attach one end of a charging hose to the port and the other end
dipped into the oil being added.
NOTE: Use ISO 100 (500 sus viscosity) mineral based refrigerant oil.
5. Press the bottom (OFF) of the switch marked RECOVER/RECYCLE and allow
unit to sit for a few minutes before attempting to read the oil level in the
nylon tube.
MONTHLY...
Clean the Condenser to maintain high efficiency performance of the TC640.
Disconnect power and remove the Compressor Compartment Cover and blow
compressed air through the cooling fins of the Condenser to remove any
debris.
Do not bend the fins on the Condenser coil. Air flow will be restricted and
cause damage to the TC640. Replace the Compressor Compartment Cover before
applying power to the TC640.
FILTER MAINTENANCE
Two Combo Filters are installed on the rear of the TC640.
Both Filters must be changed when oil is added to the compressor OR at least
once a year.