Trane Gas Unit Heaters Wartungshandbuch
7
GBNE-SVX001A-EN
Installation
Since the unit is equipped with an automatic gas ignition
system, the unit heater must be installed such that the gas
ignition control system is not directly exposed to water spray,
rain or dripping water.
system, the unit heater must be installed such that the gas
ignition control system is not directly exposed to water spray,
rain or dripping water.
NOTICE: Location of unit heaters is related directly to the
selection of sizes. Basic rules are as follows:
selection of sizes. Basic rules are as follows:
MOUNTING HEIGHT: Unit Heaters equipped with standard
fan guards must be installed at a minimum of 8' (2.4m) above
the floor, measured to the bottom of the unit. For mounting
heights above 8', see Table 2 to compare unit height to heat
throw distance.
fan guards must be installed at a minimum of 8' (2.4m) above
the floor, measured to the bottom of the unit. For mounting
heights above 8', see Table 2 to compare unit height to heat
throw distance.
AIRCRAFT HANGARS: Unit Heaters must be installed in
aircraft hangars as follows: In aircraft hangars, unit heaters
must be at least 10' (3.0m) above the upper surface of wings
or engine enclosures of the highest aircraft to be stored in
the hangar, and 8' (2.4m) above the floor in shops, offices
and other sections of the hangar where aircraft are not stored
or housed. Refer to current ANSI/NFPA No. 409, Aircraft
Hangars. In Canada, installation is suitable in aircraft hangars
when acceptable to the enforcing authorities.
aircraft hangars as follows: In aircraft hangars, unit heaters
must be at least 10' (3.0m) above the upper surface of wings
or engine enclosures of the highest aircraft to be stored in
the hangar, and 8' (2.4m) above the floor in shops, offices
and other sections of the hangar where aircraft are not stored
or housed. Refer to current ANSI/NFPA No. 409, Aircraft
Hangars. In Canada, installation is suitable in aircraft hangars
when acceptable to the enforcing authorities.
PUBLIC GARAGES: In repair garages, unit heaters must be
located at least 8' (2.4m) above the floor. Refer to the latest
edition of NFPA 88B, Repair Garages.
located at least 8' (2.4m) above the floor. Refer to the latest
edition of NFPA 88B, Repair Garages.
In Canada, installation must be in accordance to the latest
edition of CSA B149 “Installation Codes for Gas Burning
Appliances and Equipment.”
edition of CSA B149 “Installation Codes for Gas Burning
Appliances and Equipment.”
AIR DISTRIBUTION: Direct air towards areas of maximum
heat loss. When multiple heaters are involved, circulation
of air around the perimeter is recommended where heated
air flows along exposed walls. Satisfactory results can also
be obtained where multiple heaters are located toward the
center of the area with heated air directed toward the outside
walls. Be careful to avoid all obstacles and obstructions
which could impede the warm air distribution patterns. Heat
throw distances are presented in Table 2.
heat loss. When multiple heaters are involved, circulation
of air around the perimeter is recommended where heated
air flows along exposed walls. Satisfactory results can also
be obtained where multiple heaters are located toward the
center of the area with heated air directed toward the outside
walls. Be careful to avoid all obstacles and obstructions
which could impede the warm air distribution patterns. Heat
throw distances are presented in Table 2.
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 flue 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 floor surface. Additional
unit heaters should be installed if a minimum 50°F (10°C)
thermostat setting cannot be maintained.
than 50°F (10°C), hot flue gases are cooled inside the heat
exchanger to a point where water vapor (a flue 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 floor surface. Additional
unit heaters should be installed if a minimum 50°F (10°C)
thermostat setting cannot be maintained.
WARNING
Do not install unit heaters in corrosive of flammable atmospheres!
Premature failure of, or severe damage to the unit will result!
WARNING
Avoid locations where extreme drafts can affect burner opera-
tion. Unit heaters 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 will occur!
Figure 2 - Dimensional Drawing - Tubular Blower Unit Heater
Rear View
Side View
Front View
D8931B
32 1/2
A
33
L
(Discharge
Opening)
M
B
Gas Valve
Electrical Control Panel
Flue
C
G
(Discharge
Opening)
P
1 1/8
E
H
D
F
D8931B