Whirlpool WGFD293 Instruction Manual download pdf (Page 24)

115-Volt Line Connections

Before proceeding with electrical connections, ensure that the

supply voltage, frequency and phase correspond to that

specified on the unit rating plate. Power supply to the furnace

must be NEC Class 1, and must comply with all applicable

codes. The furnace must be electrically grounded in accordance

with local codes or, in their absence, with the latest edition of The

National Electric Code, ANSI NFPA 70 and/or The Canadian

Electric Code CSA C22.1.

Use a separate fused-branch electrical circuit containing properly

sized wire, and fuse or circuit breaker. The fuse or circuit breaker

must be sized in accordance with the maximum overcurrent

protection specified on the unit rating plate. An electrical

disconnect must be provided at the furnace location.

Connect hot, neutral and ground wires as shown in the wiring

diagram located on the unit’s blower door. For direct vent

applications, the cabinet opening to the junction box must be

sealed air tight using either an UL Listed/CSA approved bushing

such as Heyco Liquid Tight or by applying non-reactive UL

Listed/CSA approved sealant to bushing.

Line polarity must be observed when making field connections.

Line voltage connections can be made through either the right or

left side panel. The furnace is shipped configured for a left side

(right side for counterflows) electrical connection with the

junction box located inside the burner compartment. To make

electrical connections through the opposite side of the furnace,

the junction box must be relocated to the other side of the burner

compartment prior to making electrical connections. To relocate

the junction box, follow the steps shown in “Junction Box

Relocation.”

NOTE: Wire routing must not to interfere with circulator blower

operation, filter removal, or routine maintenance.

Junction Box Relocation

Line voltage connections can be made through either the right or

left side panel. The furnace is shipped configured for a left side

electrical connection. To make electrical connections through the

opposite side of the furnace, the junction box must be relocated

to the left side prior to making electrical connections. To relocate

the junction box, perform the following steps.

1. Remove the burner compartment door.

2. Remove and save the 2 screws securing the junction box to

the side panel.

3. Relocate junction box and associated plugs and grommets to

opposite side panel.

4. Secure with screws removed in Step 2.

To ensure proper unit grounding, the ground wire should run from

the furnace ground screw located inside the furnace junction box

all the way back to the electrical panel.

NOTE: Do not use gas piping as an electrical ground.

To confirm proper unit grounding, turn off the electrical power

and perform the following check.

1. Measure the resistance between the neutral (white)

connection and one of the burners.

2. Resistance should measure 10 ohms or less.

This furnace is equipped with a blower door interlock switch

which interrupts the unit voltage when the blower door is opened

for servicing.

NOTE: Do not defeat this switch.

24-Volt Thermostat Wiring

As a 2-stage furnace, the furnace integrated control module

provides terminals for both W1 and W2, and Y1 and Y2

thermostat connections. This allows the furnace to support the

following system applications: 2-stage heating only, 2-stage

heating with single-stage cooling and 2-stage heating with

2-stage cooling. Refer to the following thermostat wiring

diagrams for proper connections to the integrated control

module.

Low voltage connections can be made through either the right or

left side panel. Thermostat wiring entrance holes are located in

the blower compartment. The following illustration shows the

connections for a heat/cool system.

This furnace is equipped with a 40 VA transformer to facilitate use

with most cooling equipment. Consult the wiring diagram located

on the blower compartment door for further details of 115-Volt

and 24-Volt wiring.

Edges of sheet metal holes may be sharp. Use gloves as

a precaution when removing hole plugs.

WARNING

To prevent personal injury or death due to electric shock,

disconnect electrical power before installing or servicing

this unit.

WARNING

HIGH VOLTAGE!

WARNING

To avoid the risk of injury, electrical shock

or death, the furnace must be electrically

grounded in accordance with local codes or

in their absence, with the latest edition of the

National Electric Code (NEC).

WARNING

To avoid the risk of injury, electrical shock or death, the

furnace must be electrically grounded in accordance with

local codes or, in their absence, with the latest edition of the

National Electric Code (NEC).

Wire routing must not interfere with circulator blower

operation, filter removal or routine maintenance. A removable

plug connector is provided with the control to make

thermostat wire connections. This plug may be removed to

allow wire connections to be made to the plug and then

replaced. It is STRONGLY recommended that multiple wires

into a single terminal be twisted together prior to inserting

into the plug connector. Failure to do so may result in

intermittent operation.

IMPORTANT NOTE

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Whirlpool WGFD293 Instruction Manual Page 24

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