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115-Volt Line Connections; Junction Box Relocation; 24-Volt Thermostat Wiring - Whirlpool WGFD293 Installation Instructions Manual

93% and 95% 2-stage variable speed gas furnace
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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

WARNING
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!
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).
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.
24
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.
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).
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

IMPORTANT NOTE
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.
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.

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