INSTALLATION
(continued)
6
The installation is to be adjusted to obtain an air
throughput within the range specified on the rating
plate.
Unit heaters should not be installed to maintain low
temperatures and/or freeze protection of buildings.
A minimum of 50°F (10°C) thermostat setting must
be maintained.
If unit heaters are operated to maintain
lower than 50¡F (10¡C), hot flue gases are cooled
inside the heat exchanger to a point where water
vapor (a ß ue gas by-product) condenses onto the heat
exchanger walls. The result is a mildly corrosive acid that
prematurely corrodes the aluminized heat exchanger and
can actually drip water down from the unit heater onto
ß oor surface. Additional unit heaters should be installed
if a minimum 50¡F (10¡C) thermostat setting cannot be
maintained.
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
conÞ ned space. When buildings are so tight that normal
inÞ 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 walls and the vertical sides of the Unit Heater
shall be no less than 18 inches (457mm). A minimum
clearance of 6 inches (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 inches
(305mm) from any combustible. However, in order to
insure access to the burner compartment, a minimum
distance of 21 inches (533mm) is required. The distance
between the flue collector and any combustible must
be no less than 6 inches (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 structure
to which the heater is to be mounted is capable
of safely supporting its weight. Under no
circumstances must the gas lines, 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 electrical conduit for support. Failure
to heed these warnings may result in property
damage, personal injury or death.
Unit heaters must be hung level from
side to side and from front to back; see Figures
1 through 4. Failure to do so will result in poor
performance and or premature failure of the unit.
Insure that all hardware used in
the suspension or 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 1 through 4, and dimensional data
per Table 1 for suspension of units.
Figure 3 - Heater Mounting*
*All hanging hardware and wood is not included with the unit
(To be fi eld supplied).
Figure 4 - Heater Mounting 100/400 MBTU Sizes
Unit Sizes
Содержание M)
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