8
10.)
Install the vent screens provided into
both the inlet and exhaust
vent terminal elbows.
The screen must be on the outside of the last elbow. Install the screen into the female opening of
the elbow. Then cut a small piece of pipe to sandwich the screen into the elbow. NOTE be sure
that the small piece of pipe cut, does not extend past the end of the elbow. Two screens are
provided in the package.
11.)
It is extremely important that the intake and exhaust piping be
adapted to 3” immediately at the boiler using the appropriate adaptors.
Use a 3” to 2” adaptor on the exhaust and a 3” to 1½” adaptor at the inlet.
12.)
All interior vent pipe shall be supported every 24”
3.4 DETERMINING VENT LENGTHS
Use the following chart to determine the
maximum amount of vent pipe that can be
used. This chart calculates, sweep and 45º
elbows, and 90º elbows at 5 equivalent feet.
IMPORTANT:
•
The length of one vent pipe (intake or exhaust) may not exceed the length of the other vent
pipe by more then 20 equivalent feet.
•
The three 90
°
elbows of the exterior vent piping (two outlet, and one inlet) do not have to
be included, as they are taken into consideration in the vent calculations.
•
2” venting cannot be used.
•
For Propane Gas (LP) maximum vent length cannot exceed 50 equivalent feet.
Warning
Combustion air that contains chloride,
fluoride, bromine, or iodine can cause
corrosion of the heat exchanger,
voiding your warranty.
Air Inlet
3” to 1½”
adaptor
Exhaust
3” to 2” adaptor
It is recommended that two
elbows be used, so that the
slope of the horizontal
exhaust vent (1/4” per foot)
does not affect the vertical
plumb of the pipe connected
to the boiler.
Pipe
Gas
Max. Equiv.
Model
size
Type
Length
1
2
3
4
5
6
7
8
9
3"
Natural
105
100 95
90
85
80
75
70
65
60
3"
LP
50
45
40
35
30
25
20
15
10
5
Number of Elbows or 45's
Ti150 &
Ti200
