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These units are approved for residential applications. For
installation in a residential garage, these units must be
installed so that burners and ignition source are located no
less than 18" (457mm) above floor. Heater must be
located or protected to avoid physical damage by vehicles.
Refer to CAN/CGA-B149.1, current edition.
In a confined area, the heater must be installed in
accordance with the CAN/CGA-B149 Codes. Be sure to
check with local codes and ordinances for additional
requirements.
Unit Heater Installation
Unit is shipped ready for installation. Unit may be installed
as shown in Figure 1 or inverted 180° depending on
desired location as governed by clearances, vent
connection, air direction, gas supply, electrical supply and
service accessibility.
INSTALL UNIT HEATER
SUPPORT
RODS
MOUNTING
BRACKETS (2)
FIGURE 1
1-
If installing unit in an inverted position-
Remove and retain screws securing door and rotate
door 180°. Secure with retained screws. Rotate
louvers directing airflow as desired.
2- Choose location for mounting brackets.
3- Remove and retain three screws along top edge
(bottom edge when inverted) of front of unit.
4- Align screw holes on mounting bracket with holes
along top edge (either upright or inverted) of unit.
Secure one mounting bracket to front of unit with
retained screws. Secure other mounting bracket to
back of unit with screws provided in bag assembly
containing flue transition.
5- To support unit, secure mounting bracket to ceiling
joist or truss. Unit may also hang on rods as shown in
Figure 1.
Combustion and Ventilation Air
Adequate facilities for supplying air for combustion and
ventilation must be provided in accordance with the latest
edition of section 5.3, Air for Combustion and Ventilation,
of the National Fuel Gas Code, ANSI Z223.1, in the
U.S.A., CAN/CGA-B149 Installation Code in Canada, or
applicable provisions of local building codes.
All gas fired appliances require air to be used for the
combustion process. In many buildings today, there is a
negative indoor air pressure caused by exhaust fans, etc.
If sufficient quantities of combustion air are not available,
the heater or another appliance will operate in an
inefficient manner, resulting in incomplete combustion
which can result in the production of excessive carbon
monoxide.
CAUTION - Insufficient combustion air can cause
headaches, nausea, dizziness, asphyxiation or death.
If indoor air is to be used for combustion, it must be free of
the following substances or the life of the heat exchanger
will be adversely affected: chlorine, carbon tetrachloride,
cleaning solvent, halogen refrigerants, acids, cements and
glues, printing inks, fluorides, paint removers, varnishes,
or any other corrosives.
TABLE 2
MAXIMUM VENT LENGTHS
HORIZONTAL VENTS
No. of
Elbows
ft
m
1
25
7.6
2
20
6.1
3
15
4.6
4
10
3.0
5
5
1.5
Maximum length of vent connector not to exceed 30 ft (9.1 m).
