Thermo Products CBD1-50N, CHB1-125N, CHB1-75N, CHB1-100N, CBD1-75N BLOWER MOTOR SPEED WIRING Figure

Models: CHB1-50N CBD1-50N CBD1-125N CBD1-100N CBD1-75N CHB1-100N CHB1-75N CHB1-125N

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4.BLOWER MOTOR SPEED WIRING

All installations and services must be performed by qualified service personnel.

Anticipators for the heating operation are of two types, pre-set and adjustable. Those that are pre-set will not have an adjustment scale and are generally marked accordingly.

4.BLOWER MOTOR SPEED WIRING

Figure 21

Manual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual backgroundManual background: TURN OFF THE ELECTRICAL POWER to the furnace before attempting to change blower speed wiring.

A.The furnace is factory wired to the ignition control with standard heating and cooling speeds.

When changing motor speeds, simply switch the needed speed to either the heating or cooling terminal as applicable on the module to obtain the desired CFM. The unused speeds should then be reconnected to the module in the “park” positions.

B.The optional blower delay switches on the W/R integrated control (figure 21) are used to determine the length of the heat delay-to-fan-on and delay –to-fan-off periods. The following tables show the time periods that will result from the various switch positions.

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Thermo Products CBD1-50N, CHB1-125N, CHB1-75N, CHB1-100N, CBD1-75N, CBD1-100N, CBD1-125N BLOWER MOTOR SPEED WIRING Figure