Installation and Maintenance Manual

9GBNE-SVX001A-EN
AIR FOR COMBUSTION: The unit heater shall be
installed in a location in which the facilities for ventilation
permit satisfactory combustion of gas, proper venting, and
the maintenance of ambient temperature at safe limits under
normal conditions of use. The unit heater shall be located in
such a manner as not to interfere with proper circulation of
air within the confined space. When buildings are so tight
that normal infiltration does not meet air requirements,
outside air shall be introduced per Sections 1.3.4.2 and
1.3.4.3 of ANSI Z223.1 for combustion requirements. A
permanent opening or openings having a total free area of
not less than one square inch per 5,000 BTU/Hr (1.5 kW) of
total input rating of all appliances within the space shall be
provided.
NOTICE: Unit Heater sizing should be based on heat loss
calculations where the unit heater output equals or exceeds
heat loss.
CLEARANCES: Each Gas Unit Heater shall be located with
respect to building construction and other equipment so
as to permit access to the Unit Heater. Clearance between
vertical walls and the vertical sides of the Unit Heater shall
be no less than 6" (152mm). To ensure access to the control
box, a minimum of 18" (457mm) is required for the control
box side. A minimum clearance of 6" (152mm) must be
maintained between the top of the Unit Heater and the
ceiling. The bottom of the Unit Heater must be no less than
12" (305mm) from any combustible. The distance between
rear of unit and vertical wall should be no less than 18"
to maintain inlet air flow. The distance between the flue
collector and any combustible must be no less than 6"
(152mm). Also see AIR FOR COMBUSTION and VENTING
sections.
NOTICE: Increasing the clearance distances may be
necessary if there is a possibility of distortion or
discoloration of adjacent materials.
Installation (continued)
CAUTION
Unit Heaters must be hung level from side to side and from
front to back, see Figure 3A and 3B. Failure to do so will result in
poor performance and/or premature failure of the unit.
WARNING
Make sure that the structure to which the unit heater is to be
mounted is capable of safely supporting its weight. Under no
circumstances must the gas lines, the venting system or the
electrical conduit be used to support the heater; or should
any other objects (i.e. ladder, person) lean against the heater
gas lines, venting system or the electrical conduit for support.
Failure to heed these warnings may result in property damage,
personal injury, or death.
WARNING
Make certain that the lifting methods used to lift the heater and
the method of suspension used in the field installation of the
heater are capable of uniformly supporting the weight of the
heater at all times. Failure to heed this warning may result in
property damage or personal injury!
WARNING
Ensure that all hardware used in the suspension of each unit heater
is more than adequate for the job. Failure to do so may result in
extensive property damage, severe personal injury, or death!
D2788A
D4804
Figure 3A - Heater Mounting*
* All hanging hardware and wood is not included with the unit
(To be field supplied).
Refer to Figures 3A and 3B for suspension of units.
Figure 3B - Heater Suspension