Trane ReliaTel Diagnostic Manual page 92

ReliaTel Hot Surface Ignition Control (12.5 - 50 Ton 1 Stage, 2 Stage, and Modulating Gas Heat)
Modulating heat units utilize a variable speed combustion blower motor that enables the motor to
operate at the necessary speed required to provide the amount of heat required to satisfy the
current heating load of the building. The table below can be used to help determine the output rpm
of the combustion blower motor.
Table 36. Modulating Heat Voltage Ranges
92
DC Volts Approx. RPM
2.0 950
3.5 1680
5.0 2410
6.5 3140
9.0 3870
10.5 4600
Approx. Rate (MBH)
350 heater/390 heater
70/80
126/142
182/204
238/266
294/328
350/390
RT-SVD03G-EN