Installation and Service Manual

6-584.13
UNIT LOCATION
Location Recommendations
1. When locating the heater, consider general space and
heating requirements, availability of gas and electrical
supply, and proximity to vent locations.
2. When locating units, it is important to consider that the
combustion air and exhaust vent piping must be connected
to the outside atmosphere. Vent terminals should be located
adjacent to one another. Maximum equivalent vent lengths
are listed in “Section A - General Instruction - All Units” of the
venting instructions.
3. Be sure the structural support at the unit location site is
adequate to support the unit's weight. For proper operation
the unit must be installed in a level horizontal position.
4. Do not install units in locations where the flue products
can be drawn into the adjacent building openings such as
windows, fresh air intakes, etc.
5. Be sure that the minimum clearances to combustible
materials and recommended service clearances are
maintained. Units are designed for installation with the
minimum clearances as shown in Table 4.1.
Table 4.1 - Clearances
6. Do not install units in locations where gas ignition system is
exposed to water spray, rain, or dripping water.
7. Mounting height (measured from bottom of unit) at which unit
heaters are installed is critical. Refer to mounting height and
heat throw data on page 16 of this manual. The maximum
mounting height for any unit is that height above which the
unit will not deliver heated air to the floor.
Turning The Unit 180° (Model sizes 30-75 only)
All units are produced at the factory with left-side controls (when
looking at the unit). If the installation requires the controls to
be on the right side, all HDS/HDC heaters - with the exception
of the 100 and 125 - can be turned-over by following the
instructions below.
• By turning the unit 180° from the way it was received from
the factory, the sides become opposite but the front and
back remain in the same relative position. The bottom
panel now becomes the top panel and vice-versa.
• Remove the access panel, turn it 180°, and re-attach it to
the unit so that all the information labels can be read.
• Remove the spring-loaded deflector blades, turn them over,
replace, and adjust so they are open and in a position to
direct the heated air down to the floor.
UNIT LOCATION
4
DANGER
Appliances must not be installed where they may be exposed
to a potentially explosive or flammable atmosphere.
IMPORTANT
To prevent premature heat exchanger failure, do not locate
ANY gas-fired appliances in areas where corrosive vapors
(i.e. chlorinated, halogenated or acid) are present in the
atmosphere.
CAUTION
1. Clearances to combustible materials are critical. Be sure to
follow all listed requirements.
2. Low profile heaters are designed for use in heating
applications with ambient startup temperatures between
-40°F and 90°F, and ambient operating temperatures
between 40°F and 90°F.
3. Do not install unit outdoors.
4. In garages or other sections of aircraft hangars such
as offices and shops that communicate with areas used for
servicing or storage, keep the bottom of the unit at least
7' above the floor unless the unit is properly guarded.
In parking garages, the unit must be installed in accordance
with the standard for parking structures ANSI/NFPA
88A-latest edition, and in repair garages the standard for
repair garages NFPA 30A - latest edition (Formerly NFPA
88B). In Canada, installation of heaters in airplane
hangars must be in accordance with the requirements
of the enforcing authority, and in public garages in
accordance with the current CSA-B149 codes.
5. In aircraft hangars, keep the bottom of the unit at least 10'
from the highest surface of the wings or engine enclosure
of the highest aircraft housed in the hangars and in
accordance with the requirements of the enforcing authority
and/or NFPA 409-latest edition.
6. Installation of units in high humidity or salt water
atmospheres will cause accelerated corrosion, resulting in
a reduction of the normal life of the units.
Recommended Service
Clearance
HDS HDC HDS/HDC
Top and Boom 1" 6" 18"
Access Side 1" 6" 18"
Non
Access Side 1" 6" 18"
Rear 18" 18" 18"
Vent Connector 4" 4" 18"
Unit Side
Clearance to
Combusble Material