RT-SVX34C-EN 123
Maintenance
WARNING
Hazardous Pressures!
When using dry nitrogen cylinders for pressurizing units for leak testing, always provide a
pressure regulator on the cylinder to prevent excessively high unit pressures. Never pressurize
unit above the maximum recommended unit test pressure as specified in applicable unit
literature. Failure to properly regulate pressure could result in a violent explosion, which could
result in death or serious injury or equipment or property-only-damage.
• Open the main gas valve and apply power to the unit heating section; then initiate a "Heat" test
using the startup procedure described in "Verifying Proper Heater Operation".
• Verify that the ignition system operates properly.
Note: Typically, it is not necessary to clean the gas furnace. However, if cleaning does become
necessary, remove the burner plate from the front of the heat exchanger to access the drum.
Be sure to replace the existing gaskets with new ones before reinstalling the burner.
Coil Cleaning
Regular coil maintenance, including annual cleaning—enhances the unit’s operating efficiency by
minimizing:
• compressor head pressure and amperage draw;
• water carryover;
• fan brake horsepower; and,
• static pressure losses.
At least once each year—or more often if the unit is located in a “dirty” environment—clean the
evaporator, condenser, and reheat coils using the instructions outlined below. Be sure to follow
these instructions as closely as possible to avoid damaging the coils.
To clean refrigerant coils, use a soft brush and a sprayer. Contact the local Trane Parts Center for
appropriate detergents.
1. Remove enough panels from the unit to gain safe access to coils (for the 50 ton unit with the
3rd coil closest to the bulk-head, safe access can be gained by removal of the unit side panels).
WARNING
No Step Surface!
Do not walk on the sheet metal base. Walking on the base could cause the supporting metal to
collapse. Failure of the base could result in death or serious injury.
Note: Bridging between the main supports required before attempting to enter into the unit.
Bridging may consist of multiple 2 by 12 boards or sheet metal grating.
2. Straighten any bent coil fins with a fin comb.
3. Remove loose dirt and debris from both sides of the coil with a soft brush.
Table 69. Grease Recommendations
Recommended Grease Recommended Operating Range
Exxon Unirex #2
Mobil 532 -20 F to 250 F
Mobil SHC #220
Texaco Premium RB
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