INSTALLATION #2
Extending the hot air duct from the furnace into the existing plenum will help direct the flow of air from the furnace as well as the flow in the existing furnace. Ducting entering the existing plenum at an angle (approximately 45 degrees) will facilitate air flow from the furnace while diverting air from the existing furnace.
INSTALLATION #3
The baffle on this system should be made the full width of the furnace plenum in order to properly direct the air into the distribution ducts.
THE PLENUM OPENINGS DIFFER BETWEEN THE 1602 AND 1802
MODEL 1602 - 13” x 18” Rectangular MODEL 1802 - 18” x 18” Rectangular
RETURN AIR IS VERY IMPORTANT
When installing a Clayton Furnace, return air MUST BE in- corporated into the system. Return air can be provided by installing a separate duct system or by tying into the cold air return of an existing gas or oil furnace. The cold air return duct can be connected to the furnace with ei- ther a factory manufactured U. S. Stove filter box, model UFB908 or an equivalent fabricated from sheet metal.
When installing a cold air return, the minimum size shall be a 16” x 20” or equivalent (320 sq. in.) in order to insure proper furnace performance. Failure to provide return air ducts of the specified size will void your warranty.
A filter should be installed in the cold air return. Furnace fil- ters should be checked and cleaned/replaced regularly.
If return air is not provided, the warm air distributed into your home will be restricted and the efficiency of the furnace is decreased. Without a return air system, warm air will be drawn into your basement, unnecessarily heat- ing unused areas of the home. In extreme cases, if your basement or utility room is fairly airtight, the blowers on the furnace could depressurize the room and pull toxic flue gases from the furnace, a gas water heater, or gas furnace. The fumes could then be distributed throughout the house.
NEGATIVE |
PRESSURE IN |
BASEMENT |
COMBUSTION AIR
All fires need air (specifically oxygen) to burn. Furnaces, fireplaces, and wood burning furnaces need enough oxy- gen for complete combustion of their fuels. The incom- plete combustion that takes place when a furnace is “air starved” causes carbon monoxide (CO) to be formed in quantities that can be dangerous inside a well sealed house. Having a source of combustion air from outside the home will prevent “air starvation” of the furnace. A simple positive air supply can be constructed using dryer vent and a modified termination.
USSC | 5 |
