Sterling TC - Manual (Page 7)

7
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.
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!
Refer to Figures 3A and 3B for suspension of units.
Figure 3A - Heater Mounting*
*All hanging hardware and wood is not included with the unit (To
be fi eld supplied).
Figure 3B - Heater Suspension
INSTALLATION (continued)
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
confi ned space. When buildings are so tight that normal
infi ltration 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 fl ow. The distance between the fl ue 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.
Make certain that the lifting
methods used to lift the heater and the method
of suspension used in the fi eld 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!
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.
D2788A
D4804