Trane Gas Unit Heaters 维护手册
Installation: Piping
28
GTND-SVX01B-EN
•
Unit sizes 150–400: Insulate single wall vent pipe
exposed to cold air or running through unheated
areas.
exposed to cold air or running through unheated
areas.
Unit Sizes 30–120 Only: Vertically Vented
Unit Heaters (Category III)
Unit Heaters (Category III)
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, 4” (102 mm). All heaters must
be vented with a single or double wall pipe listed for
positive pressure vent systems.
on the gas unit heater, 4” (102 mm). All heaters must
be vented with a single or double wall pipe listed for
positive pressure vent systems.
2. Each unit must have an individual vent pipe and vent
terminal. Unit MUST NOT be connected to other vent
systems or to a chimney.
systems or to a chimney.
3. Category III units are limited to a maximum of 40 feet
(12.19 m) equivalent length of vent pipe. Equivalent
length is the total length of straight sections PLUS
5 feet (1.5 m) for each 90° elbow and 2.5 feet (0.75 m)
for each 45° elbow.
length is the total length of straight sections PLUS
5 feet (1.5 m) for each 90° elbow and 2.5 feet (0.75 m)
for each 45° elbow.
4. The top of the vent pipe should extend at least 2 feet
(0.61 m) above the highest point on the roof.
Consideration should be made for anticipated snow
depth. Install an Amerivent Americap or Metalbestos
vent cap over the vent opening. Slope horizontal runs
upward from the gas unit heater at least 1/4-inch per
foot (21 mm/m) minimum. Horizontal portions of the
venting system shall be supported at minimum
intervals of 4 feet (1.2 m); in Canada, support at 3 feet
(1 m) minimum intervals: see
Consideration should be made for anticipated snow
depth. Install an Amerivent Americap or Metalbestos
vent cap over the vent opening. Slope horizontal runs
upward from the gas unit heater at least 1/4-inch per
foot (21 mm/m) minimum. Horizontal portions of the
venting system shall be supported at minimum
intervals of 4 feet (1.2 m); in Canada, support at 3 feet
(1 m) minimum intervals: see
, and
.
5. Seal all vent pipe joints and seams to prevent leakage.
Use General Electric RTV-108, Dow-Corning RTV-732,
or equivalent silicone sealant with a temperature
or equivalent silicone sealant with a temperature
Figure 23.
Unit sizes 30–120: Horizontal venting
requirements using single wall vent pipe
(Category III)
requirements using single wall vent pipe
(Category III)
Figure 24.
Unit sizes 30–120: Horizontal venting
requirements using double wall vent pipe
(Category III)
requirements using double wall vent pipe
(Category III)
Figure 25.
Unit sizes 30–120: Type B draft hood
connector
connector
Figure 26.
Unit sizes 150–400: Horizontally-vented
tubular unit heater (Category III)
tubular unit heater (Category III)
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.