Lennox International Inc Elite Series Gas Furnace On-BoardLinks and Diagnostic Push Button Figure

Accessory Terminals

One line voltage “ACC” 1/4” spade terminal is provided on the furnace integrated control. See figure 65 for integrated

control configuration. This terminal is energized when the indoor blower is operating. Any accessory rated up to one amp can be connected to this terminal with the neutral leg of the circuit being connected to one of the provided neutral

terminals. If an accessory rated at greater than one amp is connected to this terminal, it is necessary to use an exter­ nal relay.

An unpowered, normally open (dry) set of contacts with a 1/4” spade terminal “HUM” are provided for humidifier con­

nections and may be connected to 24V or 120V. Any hu­ midifier rated up to one amp can be connected to these ter­ minals. In 120V humidifier applications the neutral leg of the circuit can be connected to one of the provided neutral terminals. This terminal is energized in the heating mode.

Install the room thermostat according to the instructions provided with the thermostat. See figure 64 for thermostat designations. If the furnace is being matched with a heat pump, refer to the FM21 installation instruction or appropri­ ate dual fuel thermostat instructions.

Indoor Blower Speeds

1 - When the thermostat is set to “FAN ON,” the indoor blower will run continuously on the field selectable fan speed (“LOW HEAT” is default) when there is no cool­ ing or heating demand.

2 - When the EL296UHE is running in the heating mode, the indoor blower will run on the 'LOW HEAT” or “HIGH HEAT” speed per demand.

3 - When there is a cooling demand, the indoor blower will run on the “LOW COOL” or “HIGH COOL” speed per demand.

Generator Use - Voltage Requirements

The following requirements must be kept in mind when specifying a generator for use with this equipment:

DThe furnace requires 120 volts + 10% (Range: 108 volts to 132 volts).

DThe furnace operates at 60 Hz + 5% (Range: 57 Hz to 63 Hz).

DThe furnace integrated control requires both polarity and proper ground. Both polarity and proper grounding should be checked before attempting to operate the furnace on either permanent or temporary power.

DGenerator should have a wave form distortion of less than 5% THD (total harmonic distortion).

On-Board Links and Diagnostic Push Button (Figure 65)

WARNING

Carefully review all configuration information pro­ vided. Failure to properly set DIP switches, jumpers and on-board links can result in improper operation!

On-Board Link W914 Dehum

On-board link W914, is a clippable connection between ter­ minals R and DS on the integrated control. W914 must be cut when the furnace is installed with a thermostat which features humidity control. If the link is not cut, terminal “DS” will remain energized not allowing the blower to reduce to low cool speed upon a call for dehumidification.

On-Board Link W951 Heat Pump (R to O)

On-board link W951 is a clippable connection between ter­ minals R and O on the integrated control. W951 must be cut when the furnace is installed in applications which include a heat pump unit and a thermostat which features dual fuel use. If the link is left intact, terminal “O” will remain ener­ gized eliminating the HEAT MODE in the heat pump.

On-Board Link W915 2 Stage Compr (Y1 to Y2)

On-board link W915 is a clippable connection between ter­ minals Y1 and Y2 on the integrated control. W915 must be cut if two-stage cooling will be used. If the Y1 to Y2 link is not cut the outdoor unit will operate in second-stage cool­ ing only.

Diagnostic Push Button

The diagnostic push button is located adjacent to the seven-segment diagnostic LED. This button is used to en­ able the Error Code Recall “E” mode and the Flame Signal “F” mode. Press the button and hold it to cycle through a menu of options. Every five seconds a new menu item will be displayed. When the button is released, the displayed item will be selected. Once all items in the menu have been displayed, the menu resumes from the beginning until the button is released.

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