Whirlpool WGFD293 Instruction Manual download pdf (Page 25)

Thermostat Wiring Diagram—Single-Stage Thermostat

Application

NOTE: To apply a single-stage heating thermostat, the

thermostat selector switch on the integrated control module must

be set on single-stage.

Thermostat Wiring Diagram—2-Stage Heating with

Single-Stage Cooling

Thermostat Wiring Diagram—2-Stage Heating with

2-Stage Cooling

A single-stage thermostat with only one heating stage may be

used to control this furnace. The application of a single-stage

thermostat does not offer true thermostat-driven 2-stage

operation, but provides a timed transition from low to high fire.

The furnace will run on low stage for a fixed period of time before

stepping up to high stage to satisfy the thermostat’s call for heat.

The delay period prior to stepping up can be set at either a fixed

5-minute transition time or a load based variable time between

1 and 12 minutes (Auto transition). If the Auto transition mode is

selected, the control averages the cycle times of the previous

3 cycles and uses the average to determine the time to transition

from low stage to high stage.

To use a single-stage thermostat:

1. Turn off power to the furnace.

2. Move the thermostat selection DIP switch to the Off

(single-stage) position.

3. Set the desired transition time by setting the Stage Delay DIP

switch to On for Auto transition, or Off for 5-minute transition

time.

4. Turn on power. Refer to the following illustration.

24-Volt Dehumidistat Wiring

The optional usage of a dehumidistat allows the furnace’s

circulator blower to operate at a slightly lower speed (82% of

desired speed) during a combined thermostat call for cooling and

dehumidistat call for dehumidification. This can be done through

an independent dehumidistat or through a thermostat’s DEHUM

terminal (if available). This lower blower speed enhances

dehumidification of the conditioned air as it passes through the

AC coil. For proper function, a dehumidistat applied to this

furnace must operate on 24 VAC and utilize a switch which opens

on humidity rise.

To install/connect a dehumidistat:

1. Turn off power to furnace.

2. Secure the dehumidistat neutral wire (typically the white lead)

to the terminal marked DEHUM on the furnace integrated

control module.

3. Secure the dehumidistat hot wire (typically the black lead) to

the terminal marked R on the furnace integrated control

module.

4. Secure the dehumidistat ground wire (typically the green lead)

to the ground screw on the furnace junction box.

NOTE: Ground wire may not be present on all dehumidistats.

5. Turn on power to furnace.

To enable the dehumidify function on the integrated control

module, set the dehumidification DEHUM DIP switch from Off to

On.

Once the switch is set, the dehumidify function is enabled during

a combination call for cooling (T-Stat) and dehumidification

(DEHUM-Stat).

A. Thermostat—single-stage heating

and single-stage cooling

B. Furnace integrated control module

C. Dehumidistat (optional)

D. Remote condensing unit

(single-stage cooling)

A. Thermostat—2-stage heating and

single-stage cooling

B. Furnace integrated control module

C. Dehumidistat (optional)

D. Remote condensing unit

(single-stage cooling)

A. Thermostat—2-stage heating and

2-stage cooling

B. Furnace integrated control module

C. Dehumidistat (optional)

D. Remote condensing unit

(2-stage cooling)

Y C

NEU

Y C

NEU

W1 W2

NEU

Thermostat

Stage Delay

Heat OFF Delay

DIP Switches

ON OFF

DEHUM

Unused

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Whirlpool WGFD293 Instruction Manual Page 25

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