12
GMND-SVX01B-EN
Installation: Mechanical
Note:
Furnace sizing should be based on heat loss
calculations where the furnace output equals or
exceeds heat loss.
Aircraft Hangers.
Separated Combustion must be
installed in aircraft hangars as follows: in aircraft hangars,
duct furnaces must be at least 10 feet (3.0 m) above the
upper surface of wings or engine enclosures of the highest
aircraft to be stored in the hangar, and 8 feet (2.4 m) above
the floor in shops, offices and other sections of the hangar
where aircraft are not stored or housed. In Canada,
installation is suitable in aircraft hangars when acceptable
to the enforcing authorities.
Public Garages.
In repair garages, duct furnaces must
be installed in a detached building or room separate from
repair areas as specified in the latest edition of NFPA 88B,
Repair Garages.
In parking structures, duct furnaces must be installed so
that the burner flames are located a minimum of 18 inches
(457 mm) above the floor or protected by a partition not
less than 18 inches (457 mm) high. Refer to the latest
edition of NFPA 88A, Parking Structures.
In Canada, installation must be in accordance with the
latest edition of CGA B149 “Installation Codes for Gas
Burning Appliances and Equipment.”
Clearances
Note:
Increasing the clearance distances may be
necessary if there is a possibility of distortion or
discoloration of adjacent materials.
Maintain adequate clearances around air openings into
combustion chamber:
NOTICE:
Equipment Damage!
Do not install duct furnaces in corrosive or flammable
atmospheres! Premature failure of, or severe damage to
the unit could result! Avoid locations where extreme
drafts can affect burner operation. Duct furnaces must
not be installed in locations where air for combustion
would contain chlorinated, halogenated or acidic
vapors. If located in such an environment, premature
failure of the unit could occur!
NOTICE:
Maintain Minimum Thermostat Setting!
Separated Combustion Duct Furnaces 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 duct furnaces
are operated to maintain lower than 50°F (10°C), hot
flue gases are cooled inside the heat exchanger to a
point where water 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 duct furnace
onto the floor surface. Additional duct furnaces should
be installed if a minimum 50°F (10°C) thermostat
setting cannot be maintained. Failure to follow these
recommendations could result in equipment or
property damage.
WARNING
Overheating or Flooding Could Cause Fire
or Explosion!
Overheating or flooding (where any part of the duct
furnace has been under water) could result in fire or
explosion. Should overheating occur, or the gas supply
fails to shut off, shut off the manual gas valve to the
duct furnace before shutting off the electrical supply.
Do not use the duct furnace if any part has been under
water. Immediately call a qualified service technician to
inspect the duct furnace and replace any gas control
which has been underwater. Failure to follow these
recommendations could result in death or serious
injury.
WARNING
Hazardous Gases and Flammable Vapors!
Exposure to hazardous gases from fuel substances
have been shown to cause cancer, birth defects or other
reproductive harm. Improper installation, adjustment,
alteration, service or use of this product could cause
flammable mixtures. To avoid hazardous gases and
flammable vapors follow proper installation and set up
of this product and all warnings as provided in this
manual. Failure to follow all instructions could result in
death or serious injury.
WARNING
Combustible Materials!
Maintain proper clearance between the unit heat
exchanger, vent surfaces, and combustible materials.
Refer to unit nameplate and installation instructions for
proper clearances. Improper clearances could result in a
fire hazard. Failure to maintain proper clearances could
result in death or serious injury or property damage.
Table 3.
Minimum clearances
Sides
18” (457 mm)
Top
6” (152 mm)
Bottom
25” (635 mm)
Flue
6” (152 mm)
Note:
When the clearances required for accessibility are greater than the
minimum required safety clearances, the accessibility clearances
take precedence.
