Whirlpool WGFD295 Instruction Manual download pdf (Page 26)

Optional Accessories Wiring

If it is necessary for the installer to supply additional line voltage

wiring to the inside of the furnace, the wiring must conform to all

local codes, and have a minimum temperature rating of 105°C.

All line voltage wire splices must be made inside the furnace

junction box.

The integrated control module humidifier terminals (HUM) are

energized with 115 volts whenever the induced draft blower is

energized. The integrated control module electronic air cleaner

terminals (EAC) are energized with 115 volts whenever the

circulator blower is energized.

24-Volt Humidifier

A 5" (12.7 cm) long brown wire in the wire harness at the low-fire

pressure switch provides 24 VAC humidifier control. This wire is

powered any time the pressure switch is closed. To connect

24 VAC HUM, connect the 24 VAC line of the humidifier to the 5"

(12.7 cm) brown wire. The connection can be made by either

stripping the wire and using a wire connector or by using a

field-supplied quick connect terminal. The wiring must conform

to all local and national codes. Connect the COM side of the

humidifier to the C terminal on the furnace control board (or to

the COM side of the 24 VAC transformer).

NOTE: Do not connect 115-volt humidifier to these terminals.

GAS SUPPLY AND PIPING

The furnace rating plate includes the approved furnace gas input

rating and gas types. The furnace must be equipped to operate

on the type of gas applied. This includes any conversion kits

required for alternate fuels and/or high altitude.

Inlet gas supply pressures must be maintained within the ranges

specified in the Inlet Gas Supply Pressure chart. The supply

pressure must be constant and available with all other household

gas-fired appliances operating. The minimum gas supply

pressure must be maintained to avoid unreliable ignition. The

maximum must not be exceeded to keep the furnace from

overfiring.

High Altitude Derate

When this furnace is installed at high altitude, the appropriate

high-altitude orifice kit must be applied. This is required due to

the natural reduction in the density of both the gas fuel and

combustion air as altitude increases. The kit will provide the

proper design-certified input rate within the specified altitude

range.

High altitude kits are purchased according to the installation

altitude and usage of either Natural or propane gas. Contact your

distributor for a tabular listing of appropriate altitude ranges and

corresponding manufacturer’s high altitude (Natural, propane

gas, and/or pressure switch) kits.

NOTE: Do not derate the furnace by adjusting the manifold

pressure to a lower pressure than specified on the furnace rating

plate. The combination of the lower air density and a lower

manifold pressure will prohibit the burner orifice from drawing the

proper amount of air into the burner. This may cause incomplete

combustion, flashback and possible yellow tipping.

In some areas the gas supplier may artificially derate the gas in

an effort to compensate for the effects of altitude. If the gas is

artificially derated, the appropriate orifice size must be

determined based upon the Btu/ft

content of the derated gas

and the altitude. Refer to the National Fuel Gas Code, NFPA 54/

ANSI Z223.1, and information provided by the gas supplier to

determine the proper orifice size.

A different pressure switch may be required at high altitude

regardless of the Btu/ft

content of the fuel used. Contact your

distributor for a tabular listing of appropriate altitude ranges and

corresponding manufacturer’s pressure switch kits.

Propane Gas Conversion

This furnace is configured for Natural gas. The appropriate

manufacturer’s propane gas conversion kit must be applied for

propane gas installations. Refer to “Propane Gas and/or High

Altitude Installations” section for details.

Contact your distributor for a tabular listing of appropriate

manufacturer’s kits for propane gas and/or high-altitude

installations. The indicated kits must be used to ensure safe and

proper furnace operation. All conversions must be performed by

a qualified installer or service agency.

15-Circuit Connector

Integrated Control Module

Humidifier

Electronic

Air Cleaner

Goodman 61

To prevent unreliable operation or equipment damage,

the inlet gas supply pressure must be as specified on the

unit rating plate with all other household gas-fired

appliances operating.

CAUTION

Inlet Gas Supply Pressure

Natural gas 5.0" W.C. minimum; 10.0" W.C. maximum

Propane gas 11.0" W.C. minimum; 13.0" W.C. maximum

Goodman 52

Possible property damage, personal injury or death may

occur if the correct conversion kits are not installed. The

appropriate kits must be applied to ensure safe and proper

furnace operation. All conversions must be performed by

a qualified installer or service agency.

WARNING

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Whirlpool WGFD295 Instruction Manual Page 26

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