Fan Belt Adjustment - Trane IntelliPak 1 with Symbio 800 Installation, Operation And Maintenance Manual

Service and Maintenance
Tonnage
20 (All), 25 (Std)
25 (High & eFlex)
30 (Std)
30 (High & eFlex)
40 (All)
50, 55 (Std)
50, 55 (High & eFlex)
60, 70 (Std)
60, 70 (High & eFlex), 75 (All)
90 (Std)
90 (High)
105 (Std)
115, 130 (Std)

Fan Belt Adjustment

The supply 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 installing new belts, do not
stretch them over the sheaves; instead, loosen the
adjustable motor-mounting base.
Once the new belts are installed, adjust the belt tension
using a Browning or Gates tension gauge (or equivalent)
illustrated in Figure 112, p. 134.
Figure 112. Typical belt tension gauge
Deflection = Belt Span (in.)
64
Deflection = Belt Span (mm)
152
134
Evaporator Coil
Rows/Fin
Size (ft 2 )
Series
20.3 4 / 168
25.5 5 / 168
32.5 5 / 168
38 4/ 168
43 6 / 168
4 / 148
59.3
6 / 148
59.3 5 / 148
59.3 6 / 148
Force Scale
Small
O-Ring
Span Scale
Large
O-Ring
Tube Diameter /
Size (ft
Surface
1/2" / Enhanced 58
3/8" / Enhanced 58
3/8" / Enhanced 116
1/2" / Enhanced 116
3/8" / Enhanced 136
1/2" / Enhanced 152
1/2" / Enhanced 152
1/2" / Enhanced 152
Hazardous Voltage w/Capacitors!
Failure to disconnect power and discharge capacitors
before servicing could result in death or serious
injury.
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 by
Trane or others, refer to the appropriate
manufacturer's literature for allowable waiting periods
for discharge of capacitors. Verify with a CAT III or IV
voltmeter rated per NFPA 70E that all capacitors have
discharged.
1. To determine the appropriate belt deflection:
a. Measure the center-to-center distance, in inches,
between the fan sheave and the motor sheave.
b. Divide the distance measured in Step 1a by 64; the
resulting value represents the amount of belt
deflection for the proper belt tension.
2. Set the large O-ring on the belt tension gauge at the
deflection value determined in Step 1b.
3. Set the small O-ring at zero on the force scale of the
gauge.
4. Place the large end of the gauge on the belt at the
center of the belt span. Depress the gauge plunger until
the large O-ring is even with the of the second belt or
even with a straightedge placed across the sheaves.
5. Remove the tension gauge from the belt. Notice that
Condenser Coil
2 )
Rows / Fin Series
1 / 252
2 / 252
1 / 252
2 / 252
1 / 252
1 / 252
2 / 252
1 / 252
2 / 252
2 / 276
2 / 276
2 / 276
WARNING
RT-SVX072D-EN
Type
Microchannel
Microchannel
Microchannel
Microchannel
Microchannel
Microchannel
Microchannel
Microchannel
Microchannel
Microchannel
Microchannel
Microchannel
Microchannel