92 RT-SVD03G-EN
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
DC Volts Approx. RPM
Approx. Rate (MBH)
350 heater/390 heater
2.0 950 70/80
3.5 1680 126/142
5.0 2410 182/204
6.5 3140 238/266
9.0 3870 294/328
10.5 4600 350/390
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