York GF8, G8C service manual Description 50-125 MBH Input Models, Description 150 MBH Input Models

035-19992-001 Rev. A (0404)

7.NEVER…Store flammable materials of any kind near your fur-

nace. Gasoline, solvents, and other volatile liquids should be stored only in approved containers outside your home. These materials vaporize easily and are extremely dangerous.

8.NEVER…Store cleaning materials near your furnace. Materials such as bleaches, detergents, powdered cleansers, etc., can cause corrosion of the heat exchangers.

9.NEVER…Use the area around your furnace as a storage area for items which could block the normal flow of air. This flow of air is required for ventilation of the various furnace components.

FIRE OR EXPLOSION HAZARD

This furnace is designed and approved for use with Nat- ural Gas and (LP) Propane Gas ONLY. DO NOT BURN ANY LIQUID FUEL OR SOLID FUEL IN THIS FURNACE.

Burning any unapproved fuel will result in damage to the furnace heat exchanger, which could result in Fire, Per- sonal Injury, and/or Property Damage.

DESCRIPTION (50-125 MBH INPUT MODELS)

This furnace can be installed in the upflow, downflow, or horizontal left or right position. Figure 2 shows a typical model in the downflow posi- tion and Figure 1 shows a typical model in the upflow position. The fur- nace may also lie on either side in a horizontal position. The furnace is equipped with an induced-draft vent blower and atmospheric burners. Combustion air is taken from the space or area in which the furnace is installed and drawn into the burners through the louvers in the front panel. Flue gas is drawn from the heat exchanger by the vent blower and discharged through the flue pipe to the outside atmosphere.

This is a forced air furnace. The furnace circulating air blower draws cool air from the house, passes it over the hot furnace heat exchanger and circulates the warmed air through the ductwork to the house.

The furnace is equipped with the controls necessary for proper opera- tion. The various components referred to in this manual and on the fur- nace nameplate are identified in Figures 1, 2 & 3.

VENT

FURNACE

CONTROLVENT PIPE TRANSITION

BLOWER
DOOR
SWITCH	3” DIAMETER
	VENT PIPE
ROLL-OUT
SWITCHES
BURNERS	ROLL-OUT
HOT
	SWITCH
SURFACE
IGNITOR
GAS
VALVE	VENT
PRESSURE	BLOWER
SWITCH

FIGURE 2: Component Locations - Downflow (50 - 125 MBH Models)

DESCRIPTION (150 MBH INPUT MODELS)

This furnace can be installed in the upflow or horizontal left or right posi- tion. Figure 3 shows the 150 MBH input model. The furnace may also lie on either side in a horizontal position. This furnace is not approved to be installed in a downflow application. The furnace is equipped with an induced-draft vent blower and atmospheric burners. Combustion air is taken from the space or area in which the furnace is installed and drawn into the burners through the louvers in the front panel. Flue gas is drawn from the heat exchanger by the vent blower and discharged through the flue pipe to the outside atmosphere.

This is a forced air furnace. The furnace circulating air blower draws cool air from the house, passes it over the hot furnace heat exchanger and circulates the warmed air through the ductwork to the house.

The furnace is equipped with the controls necessary for proper opera- tion. The various components referred to in this manual and on the fur- nace nameplate are identified in Figure 3.

VENT BLOWER

DIRT

LEG

ROLL-OUT

SWITCH

PRESSURE

SWITCH

GAS

VALVE

HOT

SURFACE

IGNITOR

BURNERS

ROLL-OUT

SWITCHES

BLOWER

DOOR

SWITCH

FURNACE

CONTROL

VENT	PRESSURE
	SWITCH
BLOWER
	GAS
	VALVE
ROLL-OUT	HOT
SWITCH	SURFACE
	IGNITOR
	BURNERS
ROLL-OUT	BLOWER
SWITCHES	DOOR
	SWITCH
	FURNACE
	CONTROL

FIGURE 3: Component Locations - Upflow (150 MBH Models)

FIGURE 1: Component Locations - Upflow (50 - 125 MBH Models)

2 Unitary Products Group