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This formula can be used to calculate the correct setting for the adjustable heat anticipator:
Ammeter reading = Anticipator Setting.
No. of wire loops
Or in this case,
_2.5 A. = 0.25 A. (Anticipator Setting)
10
4. Adjust the position of the anticipator indicator to match the calculated ammeter setting. If a slightly
longer cycle is desired, the pointer should be moved to a higher setting. Slightly shorter cycles can be
achieved by moving to a lower setting.
5. Remove the meter jumper wire and reconnect the thermostat. Check the thermostat in the heating
mode for proper operation.
If a digital ammeter is used, read the current draw directly from meter. (Steps 1 through 3 are not
required.) The meter reading is the correct anticipator setting.
L. Blower Motor Speed Selection:
: Turn off the electrical power to the unit, before attempting to change supply air
blower speed wiring.
The furnace comes from the factory with the proper cooling speed selected and the heat rise set to
approximately 65°F on mid-fire.
The heat rise is determined by the nozzle size and the switch selection on the control board located in the
vestibule compartment.
For ECM systems, switches 1, 2 & 3 of switch block SW1 (the six switch red block) are used to select the
proper blower speed. Please refer to (figure 15 and table 18).