Fan Belt Adjustment - Trane IntelliPak SAHL Series Installation, Operation And Maintenance Manual

Table 64. Refrigerant coil fin data (continued)
Evaporator Coil
Size Rows/Fin
Tonnage (ft2) Series
60 43 6/168
70 43 6/168
75 43 6/168
90 Std 59.3 4/148
90 Hi Cap 59.3 6/148
90 Hi EER 59.3 6/148
105 Hi Cap 59.3 5/148
115 Std Cap 59.3 6/148
130 Std Cap 59.3 6/148

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)
illustrated below; adjust the belt tension as follows;
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing. Follow proper
lockout/tagout procedures to ensure the power can not be inadvertently energized. Failure to
disconnect power before servicing could result in death or serious injury.
1. To determine the appropriate belt deflection;
2. Set the large O-ring on the belt tension gauge at the
3. Set the small O-ring at zero on the force scale of the
4. Place the large end of the gauge at the center of the
RT-SVX36G-EN
Tube Diameter/
Surface
3/8"/Enhanced
3/8"/Enhanced
3/8"/Enhanced
1/2 / Enhanced
1/2 / Enhanced
1/2 / Enhanced
1/2 / Enhanced
1/2 / Enhanced
1/2 / Enhanced
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.
deflection value determined in Step 1b.
gauge plunger.
belt span; then depress the gauge plunger until the
large O-ring is even with the top of the next belt—
-or even with a straightedge placed across the fan
and motor sheaves. Refer to
Aluminum Fins
Size Rows/Fin Tube Diameter/
(ft2) Series Surface
136 3/252 5/16/Enhanced
136 3/252 5/16/Enhanced
136 3/252 5/16/Enhanced
152 3/144 3/8 Smooth
152 3/144 3/8 Smooth
152 4/144 3/8 Smooth
152 4/144 3/8 Smooth
152 4/144 3/8 Smooth
152 4/144 3/8 Smooth
WARNING
Figure 91.
Maintenance
Condenser Coil
Copper Fins
Rows/Fin Tube Diameter/
Series Surface
3/156 5/16/Enhanced
4/156 5/16/Enhanced
4/156 5/16/Enhanced
NA
NA
NA
NA
NA
NA
Figure 90. Browing (or gates)
tension gauge
NA
NA
NA
NA
NA
NA
177