Trinity
│
Installation and Operation Instructions
Ti Series
14
Figure 3-9
Venting Below Grade
For installations that exit the wall below grade:
1.
Excavate site to a point below where the pipes are to
exit as shown.
2.
Ensure that the wall is fully sealed where the pipes
penetrate the wall.
3.
The Vent/Air-intake piping MUST be secured to the
side of the building above grade, as shown, to provide
rigidity.
4.
NTI Provides a mounting bracket PN. 82075 for
securing the exhaust pipes.
5.
Ensure that the Vent/Air-Intake clearances are
maintained, see Section 4.0 for details.
Figure 3-10
Outdoor Horizontal Venting
Vent piping outside the Building is permitted under the
following conditions:
1.
The maximum length outside the building is 20 feet [6.1
m]. Note that outdoor length must be included in the
overall vent length calculation.
2.
All normal termination clearances are maintained.
3.
The pipe is supported every 24” [610 mm].
4.
The exhaust and inlet are sloped back to the boiler ½”
elevation for every linear foot [13 mm for every linear
305 mm].
Figure 3-11
Existing Chimney Chase Way
It is permissible to use an existing chimney as a chase way to
run the Vent/Air-Intake piping as long as:
1.
The chimney is not being used by any other boiler.
2.
Flue gases don’t enter the vacant chimney.
3.
Only Trinity certified venting materials are used, see
Section 3.0.
4.
Vent lengths are within the maximums specified.
5.
The top of the chimney is capped and the Vent/Air-Inlet
pipes are flashed to prevent leakage into the vacant
chimney.
Air-Inlet
Existing
Chimney
(used as a
chase way)
Chimney
Cap
Exhaust Vent
Exhaust Vent Min.
18” [457 mm]
above air-inlet
Air-Inlet
Min. 12” [305 mm]
above roof and
snow level
Supports every
24” [610 mm]
12” [305 mm] plus snow
allowance above grade
Air-Inlet
Maximum of 20 ft
[6.1 m] is permitted
for piping outside a
building.
Apply
Warning
Plate
here
Exhaust
Vent
Gas Vent Directly Below
Keep Free of Obstructions
Exhaust Vent
Air-Inlet
Mounting
Bracket
