Lenox ML180UHE installation instructions Heat FAN-OFF Time in Seconds, No Jumper

			HEAT FAN-OFF TIME IN SECONDS
					NO JUMPER
	To adjust fan−off timing, reposition jumper across pins to
					achieve desired setting.
60 Second				90 Second				120 Second				180 Second
off Time				off Time					off Time				off Time
60	90	120	180	60	90	120	180	60	90	120	180	60	90	120	180

FIGURE 36

Thermostat Heat Anticipation

Set the heat anticipator setting (if adjustable) according to the amp draw listed on the wiring diagram that is attached to the unit.

Constant Torque Motor

ML180UHE units are equipped with a constant torque ECM motor. It has a DC motor coupled to an electronic control module both contained in the same motor housing. The mo- tor is programmed to provide constant torque at each of the five selectable speeds. The motor has five speed taps. Each tap requires 24 volts to energize.

Input Voltage Requirements

The circuit is designed to be operated with AC voltage. A voltage of 12 to 33VAC is required to energize the motor. Expected current draw will be less than 20mA.

Blower Speeds

Follow the steps below to change the blower speeds. 1 − Turn off electrical power to furnace.

2 − Remove blower access panel.

3 − Disconnect existing speed tap at integrated control speed terminal.

NOTE − Termination of any unused motor leads must be insulated.

4 − Place unused blower speed tap on integrated control PARK" terminal or insulate.

5 − Refer to blower speed selection chart on unit wiring dia- gram for desired heating or cooling speed. See Blower performance data beginning on the next page.

6 − Connect selected speed tap at integrated control speed terminal.

7 − Resecure blower access panel.

8 − Turn on electrical power to furnace.

9 − Recheck temperature rise. Electronic Ignition

The integrated control has an added feature of an internal Watchguard control. The feature serves as an automatic re- set device for integrated control lockout caused by ignition failure. This type of lockout is usually due to low gas line pressure. After one hour of continuous thermostat demand for heat, the Watchguard will re−set and remake thermostat demand to the furnace and automatically reset the inte- grated control to begin the ignition sequence.

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