HP (Hewlett-Packard) 422690 I Furnace user guide

Electrical wiring must conform with local building codes or in the absence of local codes, with the current National

Electrical Code, ANSI/NFPA 70 or current Canadian

Electrical Code, CSA C22.1.

Level furnace from front to back and from left to right within

1/4 inch. Furnace must be installed level for proper condensate drainage.

Furnace will not operate if condensate does not drain.



You may install this upflow furnace in an alcove, attic, basement, closet, garage or utility room. Do not install furnace in an area subject to freezing temperatures.

This furnace operates best when return-air temperature is between 55F and 80F. Do not install furnace in a location subject to continuous higher or lower temperatures.

Continuous operation outside of this range may shorten furnace life.

WARNING: Do not install furnace in any other position other than upflow. Doing so could cause heat exchanger blockage and damage to heat exchanger.

Select a location that meets all requirements described in this manual for the following:

Minimum Clearances

Combustion and Ventilation Air

Duct System

Gas Piping

Electrical Wiring

Locate furnace as near to the center of the air distribution system as possible.

Installers Information Manual

Install furnace so all electrical components are protected

from water.

When furnace is located within the heated space, exhaust fans can adversely affect its operation. Exhaust fans in kitchen, bathrooms, clothes dryers or anywhere within heated space, increase combustion air requirements of non-direct vented furnaces. This is because exhaust fans reduce the amount of combustion air available to the furnace. A fireplace also reduces amount of combustion

Sufficient air must be provided to ensure there will not be a negative pressure in furnace room or space. In addition, there must be a positive seal between fu rnace and return air duct to avoid pulling air from burner area.

When a cooling unit is installed with this fu rnace, the furnace must be installed parallel with or on the upstream side of the cooling unit to avoid condensation in furnace heat exchanger. With a parallel flow arrangement, the dampers or other means used to control flow of air must be adequate to prevent chilled air from entering the furnace and, if manually operated, must be provided with a means to prevent operation of either unit unless damper is in the full heat or cool position.

When furnace is in a residential garage, it must be installed so that pilot and main burners are located no less than 18 inches above the floor. Also, furnace should be protected from physical damage by vehicles.

When furnace is in a public garage, airplane hanger, or other building having hazardous atmosphere, install unit in accordance with recommended good practice requirements of the National Fire Protection Association, Inc. Consult local code authorities for additional location requirements.

See Figure 1 for furnace dimensions and clearances.