Heat Controller HDG48, HDG60, HDG30, HDG24, HDG42, HDG36 Exception warning to downflow

HDG Series Air Handler INSTALLATION INSTRUCTIONS Heat Controller, Inc.

Warning

Do not install this unit in manufactured (mobile) homes. Improper installation is more likely in manufactured housing due to ductwork material, size, location and arrangement. Installations in manufactured housing can cause fire resulting in property damage, personal injury or death.

EXCEPTION: Manufactured housing installations are approved only with documentation by a recognized inspection authority that verifies that the installation has been made in compliance with the instructions and all warnings have been observed.

Warning

Duct leaks can create an unbalanced system and draw pollutants such as direct, dust, fumes and odors into the home causing property damage. Fumes and odors from toxic, volatile or flammable chemicals, as well as automobile exhaust and carbon monoxide (CO), can be drawn into the living space through leaking ducts and unbalanced duct systems causing personal injury or death (see Figure 1).

•If air-moving equipment or ductwork is located in garages or off-garage storage areas, all joints, seams, and openings in the equipment and duct must be sealed to limit the migration of toxic fumes and odors including carbon monoxide from migrating into the living space.

•If air-moving equipment or ductwork is located in spaces containing fuel burning appliances such as water heaters or boilers, all joints, seams and openings in the equipment and duct must be sealed to prevent depressurization of the space and possible migration of combustion byproducts including carbon monoxide into the living space.

Notice

When used in cooling applications, excessive sweating may occur when unit is installed in an unconditioned space. This can result in property damage.

Notice

In compliance with recognized codes, it is recommended that an auxiliary drain pan be installed under all evaporator coils or units containing evaporator coils that are located in any area of a structure where damage to the building or building contents may occur as a result of an overflow of the coil drain pan or a stoppage in the primary condensate drain piping.

Warning

The first 36 inches of supply air plenum and ductwork must be constructed of sheet metal as required by NFPA 90B. The supply air plenum or duct must have a solid sheet metal bottom directly under the unit with no openings, registers or flexible air ducts located in it. If flexible supply air ducts are used they may be located only in the vertical walls of rectangular plenum, a minimum of 6 inches from the solid bottom. Metal plenum of duct may be connected to the combustible floor base, if not, it must be connected to the unit supply duct exposed to the supply air opening from the downflow unit. Exposing combustible (non-metal) material to the supply opening of a downflow unit can cause a fire resulting in property damage, personal injury or death.

Exception warning to downflow:

Installations on concrete floor slab with supply air plenum and ductwork completely encased must be not less than 2 inches of concrete (See NFPA 90A).

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