4
Important
Should overheating occur, or the gas supply fail
to shut off, shut off the manual gas valve to the
unit before shutting off the electrical supply.
FIGURE 1
FIGURE 2
FIGURE 3
AIR FILTERS
It is the user’s responsibility to check the condition of
the air filters on at least a monthly basis when the unit is
in use and to clean or replace whenever it is necessary.
Permanent Type Filter (usually foam type) are washable.
Use a solution of soapy water, followed by a rinse in
clear water and then dried by tapping the frame against a
solid object.
Never operate the unit without proper filters in place.
Never substitute a throwaway (fiberglass) for a perma-
nent (foam) type.
Return air filter size is 20 x 30 x 1 (throwaway) and is
serviceable from the left side of the unit as shown in
Figure 2.
Fresh air filter size is 4 x 26 x 1/2 and is a permanent
type filter, refer to Figure 2 for service location.
AIR CONDITIONING START UP
PROCEDURE CRANKCASE HEATERS
Single and three phase models have an insertion well-
type heater located in the lower section of the compres-
sor housing. This is a self-regulating type heater that
draws only enough power to maintain the compressor at
a safe temperature.
Some form of crankcase heat is essential to prevent
liquid refrigerant from migrating to the compressor,
causing oil pump out on compressor start-up and
possible valve failure due to compressing a liquid.
The decal in Figure 4 is affixed to all outdoor units
detailing start-up procedures. This is very important.
Please read carefully.
FIGURE 4
Warning
Never store or use flammable liquids or vapors
near or on your unit. These include gasoline,
kerosene, cigarette lighter fluid, cleaning fluids,
solvents, paint thinners or painting compounds.
Flammable vapors can travel great distances
before igniting. Flammables could cause fires or
explosions and result in damage, injury or death.
Warning
Never store or use anything near or on your unit
that can produce vapors that are corrosive to gas-
fired appliances. Vapors from products containing
chlorines, fluorines, bromines and iodines can
cause vent system or heat exchanger failure.
Examples of such products are spray or aerosol
containers, detergents, bleaches, cat litter, waxes,
adhesives, solvents and other cleaning compounds.
Vent system or heat exchanger failure could cause
nausea, asphyxiation or fire, resulting in damage.
CLEARANCES
There are certain minimum installation clearances from
the unit cabinet and sheet metal plenum attached to the
unit to any combustible materials. These clearances for
each model are shown on the unit rating plate (located
on the right side) and are the responsibility of the
installer during the installation of the appliance.
It is the user’s responsibility to make sure these clear-
ances are always maintained thereafter. Additionally, a
minimum of 30 inches for serviceability is required from
the right side of all models.
COMBUSTION AND VENTILATING AIR
It is the responsibility of the user to assure that the
important flow of combustion and ventilating air is not
obstructed from reaching the unit.
Do not block or obstruct air openings on the unit.
LIGHTING AND SHUTDOWN
INSTRUCTIONS
Refer to Figure 3 for general location of components
referenced in the following “Lighting and Shutdown
Instructions.” These components are located behind the
“Burner Access Door”.