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10
GAS-FIRED HEATER Installation Manual
PART 3: PREPARE MUNCHKIN CONTENDER LOCATION
(CONTINUED)
D. RESIDENTIAL GARAGE INSTALLATION
Precautions
Take the following special precautions when
installing the Munchkin Contender in a residen-
tial garage. If the heater is located in a residen-
tial garage, per ANSI Z223.1, paragraph 5.1.9:
• Mount the heater with a minimum of 18
inches above the floor of the garage to the
bottom of the heater to ensure the burner
and ignition devices will be no less than 18
inches above the floor.
• Locate or protect the heater so it cannot be
damaged by a moving vehicle.
E. EXHAUST VENT AND INTAKE AIR VENT
The Munchkin Contender requires a special vent
system, designed for pressurized venting.
Munchkin Contenders are rated ANSI Z21.10.3
Category IV (pressurized vent, likely to con-
dense in the vent).
You must also install air intake piping from outside
to the heater flue adaptor. The resultant installa-
tion is categorized as direct vent (sealed combus-
tion). Note: To prevent combustion air con-
tamination see Table 3-2 in this section
when considering exhaust vent and intake
air vent termination.
Intake and exhaust must terminate near each
other and may be vented vertically through the
roof or out a side wall. The intake and exhuast
venting methods are detailed in the Venting
Section. Do not attempt to install the Munchkin
Contender Heater using any other means. Be
sure to locate the heater such that the air intake
and exhaust vent piping can be routed through
the building and properly terminated. The air
intake and exhaust vent piping lengths, routing
and termination method must all comply with the
methods and limits given in the Venting section.
F. PREVENT COMBUSTION AIR CONTAMINATION
Install intake air piping for the Munchkin
Contender as described in the Venting section.
Do not terminate exhaust in locations that can
allow contamination of intake air.
WARNING
The space must be provided with combus-
tion/ventilation air openings correctly sized for
all other appliances located in the same space as
the Munchkin Contender heater. The heater
cover must be securely fastened to the heater to
prevent heater from drawing air from inside the
heater room. This is particularly important if the
heater is located in the same room as other ap-
pliances. Failure to comply with the above warn-
ings could result in severe personal injury, death
or substantial property damage.
WARNING
You must pipe outside air to the heater air
intake. Ensure that the intake air will not
contain any of the contaminants below.
Contaminated air will damage the heater,
resulting in possible severe personal injury,
death or substantial property damage. For
example, do not pipe intake air vent near a
swimming pool. Also avoid areas subject to
exhaust fumes from laundry facilities. These
areas will always contain contaminants.
Products to avoid
Spray cans containing fluorocarbons
Permanent wave solutions
Chlorinated waxes/cleaners
Chlorine-based swimming pool chemicals
Calcium chloride used for thawing
Sodium chloride used for water softening
Refrigerant leaks
Paint or varnish removers
Hydrochloric acid/muriatic acid
Cements and glues
Antistatic fabric softeners used in clothes dryers
Chlorine-type bleaches, detergents, and cleaning
solvents found in household laundry rooms
Adhesives used to fasten building products and
other similar products
Areas likely to have contaminants
Dry cleaning/laundry areas and establishments
Swimming pools
Metal fabrication plants
Beauty shops
Refrigeration repair shops
Photo processing plants
Auto body shops
Plastic manufacturing plants
Furniture refinishing areas and establishments
New building construction
Remodeling areas
Garages and workshops
Table 3-2: Corrosive contaminants and sources