Whirlpool WGFD295 Instruction Manual download pdf (Page 39)

■ R and W1 (or R and W1/W2) thermostat contacts open,

completing the call for heat.

■ Gas control valve closes, extinguishing flame.

■ Induced draft blower is de-energized following a 15-second

post purge. Humidifier terminal is de-energized.

■ Circulator blower continues running for the selected heat-off

delay period (90, 120, 150 or 180 seconds). The speed run

during this period depends on the last heat call provided by

the thermostat. If the last call for heat was a call for low heat,

the air circulator motor will run on low heat speed for the

duration of the heat-off delay period (90, 120, 150 or

180 seconds). If the last call for heat was a call for high heat,

the air circulating motor will run on the high heating speed for

30 seconds and then switch to the low-heating speed for the

balance of the heat-off delay period (60, 90, 120 or

150 seconds).

■ Circulator blower and electronic air cleaner terminals are de-

energized.

■ Circulator blower ramps down to Off during the 30 seconds

following the heat-off delay period.

■ Furnace awaits next call from thermostat.

Cooling Mode

The normal operational sequence in cooling mode is as follows:

■ R and Y1/G or Y2/G thermostat contacts close, initiating a

call for cool.

■ Integrated control module performs safety circuit checks.

■ Outdoor fan and compressor are energized to their

appropriate speeds.

■ Circulator blower is energized on the appropriate cool speed

at the level and time determined by the selected ramping

profile. Electronic air cleaner terminals are energized with

circulator blower.

■ Furnace circulator blower and outdoor cooling unit run their

appropriate speed; Integrated control module monitors safety

circuits continuously.

■ R and Y1/G or Y2/G thermostat contacts open, completing

the call for cool.

■ Outdoor fan and compressor are de-energized.

■ Circulator blower continues running during a cool-off delay

period. The Off delay time and airflow level are determined by

the selected ramping profile.

■ Electronic air cleaner terminal and circulator blower are

de-energized.

■ Furnace awaits next call from thermostat.

Fan Only Mode

The normal operational sequence in fan only mode is as follows:

■ R and G thermostat contacts close, initiating a call for fan.

■ Integrated control module performs safety circuit checks.

■ Circulator blower is energized on continuous fan speed (30%

of the furnace’s maximum airflow capability) following a

5-second delay. Electronic air cleaner terminal is energized.

■ Circulator blower runs; integrated control module monitors

safety circuits continuously.

■ R and G thermostat contacts open, completing the call for

fan.

■ Electronic air cleaner terminal and circulator blower are

de-energized.

■ Furnace awaits next call from thermostat.

Operational Checks

Burner Flame

The burner flames should be inspected with the burner

compartment door installed. Flames should be stable, soft and

blue (dust may cause orange tips but must not be yellow). The

flames must extend directly outward from the burner without

curling, floating or lifting off. Flames must not impinge on the

sides of the heat exchanger firing tubes.

Burner Flame

Check the burner flames for good adjustment, a stable, soft and

blue flame that is not curling, floating or lifting off.

SAFETY CIRCUIT DESCRIPTION

General

A number of circuits are employed to ensure proper furnace

operation. These circuits serve to control any potential safety

hazards and serve as inputs in the monitoring and diagnosis of

abnormal function. These circuits are continuously monitored

during furnace operation by the integrated control module.

Integrated Control Module

The integrated control module is an electronic device which, if a

potential safety concern is detected, will take the necessary

precautions and provide diagnostic information through an LED.

Primary Limit Control

The primary limit control is located on the partition panel and

monitors heat exchanger compartment temperatures. It is a

normally closed (electrically), automatic reset, temperature-

activated sensor. The limit guards against overheating as a result

of insufficient conditioned air passing over the heat exchanger.

Auxiliary Limit Controls

The auxiliary limit controls are located on or near the circulator

blower and monitors blower compartment temperatures. They

are normally-closed (electrically), manual-reset sensors. These

limits guard against overheating as a result of insufficient

conditioned air passing over the heat exchanger.

Rollout Limit Controls

The rollout limit controls are mounted on the burner/manifold

assembly and monitor the burner flame. They are normally-

closed (electrically), manual-reset sensors. These limits guard

against burner flames not being properly drawn into the heat

exchanger.

1 2 ... 34 35 36 37 38 39 40 41 42 43 44 ... 51 52

Comments to this Manuals

No comments

Whirlpool WGFD295 Instruction Manual Page 39

Comments to this Manuals

Related products and manuals for Water heaters & boilers Whirlpool WGFD295