user manual

HDG Series Air Handler INSTALLATION INSTRUCTIONS Heat Controller, Inc.

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 re resulting in property damage, personal injury or death.

EXCEPTION: Manufactured housing installations are approved only with documentation by a

recognized inspection authority that veries that the installation has been made in compliance

with the instructions and all warnings have been observed.

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

ammable 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.

When used in cooling applications, excessive sweating may occur when unit is installed in an

unconditioned space. This can result in property damage.

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 overow

of the coil drain pan or a stoppage in the primary condensate drain piping.

The rst 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 exible air ducts located in it. If exible 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 oor

base, if not, it must be connected to the unit supply duct exposed to the supply air opening from the

downow unit. Exposing combustible (non-metal) material to the supply opening of a downow unit

can cause a re resulting in property damage, personal injury or death.

Exception warning to downow:

Installations on concrete oor slab with supply air plenum and ductwork completely encased

must be not less than 2 inches of concrete (See NFPA 90A).

Warning

Notice

Warning