Trane Gas Unit Heaters Wartungshandbuch
Installation: Piping
26
GTND-SVX01B-EN
All Unit Sizes: Horizontally Vented Unit
Heaters (Category III)
Heaters (Category III)
Unit sizes 150–400: Horizontal venting arrangements are
designed to be used with single wall vent pipe. Horizontal
venting arrangements must terminate external to the
building using either single wall or double wall (Type B)
vent. If single wall vent pipe is used, it must be constructed
of 26-gauge galvanized steel or a material of equivalent
durability and corrosion resistance for the vent system.
For installations in Canada, use corrosion-resistant and
gas-tight, listed vent pipe conforming with local building
codes, or in the absence of local building codes, with
current CSA-B149.1, “Installation Codes for Natural Gas
Burning Appliances and Equipment” or CSA-B149.2,
“Installation Codes for Propane Gas Burning Appliances
and Equipment”. Refer to
designed to be used with single wall vent pipe. Horizontal
venting arrangements must terminate external to the
building using either single wall or double wall (Type B)
vent. If single wall vent pipe is used, it must be constructed
of 26-gauge galvanized steel or a material of equivalent
durability and corrosion resistance for the vent system.
For installations in Canada, use corrosion-resistant and
gas-tight, listed vent pipe conforming with local building
codes, or in the absence of local building codes, with
current CSA-B149.1, “Installation Codes for Natural Gas
Burning Appliances and Equipment” or CSA-B149.2,
“Installation Codes for Propane Gas Burning Appliances
and Equipment”. Refer to
and
for special installation requirements
regarding these venting conditions.
Observe the following precautions when venting the unit:
1.
Use flue pipe of the same size as the flue connection(s)
on the gas unit heater:
on the gas unit heater:
Figure 22.
All unit sizes: Vertical venting (Category I)
Unit sizes 30–120: 1” (25.4 mm) minimum
distance from pipe to ceiling
Unit sizes 150–400: 6” (152 mm)
minimum distance from pipe to ceiling
2 feet Min.
(0.61 m Min.)
5 feet Min.
1.52 m Min.
Approved Vent Terminal
Use Insulated Stack Outdoors
Thimble
Roof
1/4” Min.
(6 mm)*
1 foot
(305 mm)*
10 feet Max. (3.05 m)
(Not to exceed 75% of Vertical
Flue Height)
*1/4” per foot (21 mm per m)
WARNING
Carbon Monoxide!
Never operate unit heaters without combustion air and
flue gas piping in place. Each unit heater MUST have its
own combustion air system and MUST NOT be
connected to other vent systems or to a chimney. Your
venting system must not be blocked by any snow,
snow drifts, or any foreign matter. Inspect your venting
system to ensure adequate ventilation exists at all
times! Failure to follow these recommendations could
result in death or serious injury.
flue gas piping in place. Each unit heater MUST have its
own combustion air system and MUST NOT be
connected to other vent systems or to a chimney. Your
venting system must not be blocked by any snow,
snow drifts, or any foreign matter. Inspect your venting
system to ensure adequate ventilation exists at all
times! Failure to follow these recommendations could
result in death or serious injury.
WARNING
Risk of Carbon Monoxide Poisoning with
Type B Vent!
Type B Vent!
Unit sizes 150–400: Do not use a Type B (double wall)
vent internally within the building on power vented
units! Type B vent does not seal well under positive
pressure and could result in exhaust fume leaks. Failure
to follow these recommendations could result in death
or serious injury.
vent internally within the building on power vented
units! Type B vent does not seal well under positive
pressure and could result in exhaust fume leaks. Failure
to follow these recommendations could result in death
or serious injury.
Unit sizes 150–400: If double wall venting (other than
Type B; see preceding warning) is used, components
which are UL-Listed and approved for Category III
positive pressure venting systems MUST be used.
Type B; see preceding warning) is used, components
which are UL-Listed and approved for Category III
positive pressure venting systems MUST be used.
Table 7.
All unit sizes: Vent systems termination
clearance requirements
clearance requirements
Structure
Minimum for
Termination Locations
Termination Locations
Door, window or any gravity vent inlet
4 feet below
4 feet horizontally
1 foot above
Forced air inlet within 10 feet
3 feet above
Adjoining building or parapet
6 feet
Adjacent public walkways
7 feet above grade