Service and Maintenance
RT-SVX24J-EN 179
Fan Belt Adjustment
The supply fan belts and optional exhaust fan belts must
be inspected periodically to assure proper unit operation.
Replacement is necessary if the belts appear frayed or
worn. Units with dual belts require a matched set of belts
to ensure equal belt length.
When removing or installing the new belts, do not stretch
them over the sheaves. Loosen the belts using the belt
tension adjustment bolts on the motor mounting base.
Once the new belts are installed, using a Browning or
Gates tension gauge (or equivalent), see Figure 121,
adjust the belt tension as follows:
1. To determine the appropriate belt deflection:
a. Measure the center-to-center shaft distance (in
inches) between the fan
and motor sheaves.
b. Divide the distance measured in Step 1a by 64; the
resulting value represents the amount of belt
deflection that corresponds to the proper belt
tension.
Table 57. Grease Recommendation
Recommended Grease
for Fan Bearings
Recommended
Operating Range
Exxon Unirex #2
Mobil 532 -20 F to 250 F
Mobil SHC #220
Texaco Premium RB
Table 58. Air-Cooled Condenser—Refrigerant Coil Fin Data
Tons Coil Type
Coil Fin
Config. Tube Dia. Coil Rows Fins per foot
Coil Face
Area (sq. ft.) Tube Type
90
Evaporator Enhanced 1/2 3 168 73.75 Internally Finned
Hi-Cap Evap Enhanced 1/2 5 168 73.75 Internally Finned
Condenser Enhanced 25 mm 1 240 134 Microchannel
105
Evaporator
Internally
Finned
1/2 4 168 73.75 Internally Finned
Hi-Cap Evap
Internally
Finned
1/2 6 168 73.75 Internally Finned
Condenser Enhanced 25 mm 1 240 161 Microchannel
120
Evaporator
Internally
Finned
1/2 3 168 106.25 Internally Finned
Hi-Cap Evap
Internally
Finned
1/2 6 168 106.25 Internally Finned
Condenser Enhanced 18 mm 2 276 161 Microchannel
130
Evaporator
Internally
Finned
1/2 4 168 106.25 Internally Finned
Hi-Cap Evap
Internally
Finned
1/2 6 168 106.25 Internally Finned
Condenser Enhanced 18 mm 2 276 161 Microchannel
150
Evaporator
Internally
Finned
1/2 6 168 106.25 Internally Finned
Condenser Smooth 18 mm 2 276 161 Microchannel
WARNING
Hazardous Voltage w/Capacitors!
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. For variable frequency drives
or other energy storing components provided byTrane
or others, refer to the appropriate manufacturer’s
literature for allowable waiting periods for discharge of
capacitors.Verify with an appropriate voltmeter that all
capacitors have discharged. Failure to disconnect
power and discharge capacitors before servicing could
result in death or serious injury.
For additional information regarding the safe discharge
of capacitors, see PROD-SVB06A-EN
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