NTI Trinity TX Series Installation And Operation Manual page 15

Tx I&O Manual
Vent/Air-inlet Pipe Material
Table 4-2 Approved Vent and Air-inlet Pipe Material
1
Items Materials
PVC - DWV
PVC Schedule 40
Vent Piping
CPVC Schedule 40
and Fittings
Stainless Steel (SS)
Polypropylene (PP)
PVC
Pipe Cement
CPVC
Primers
PVC / CPVC
Notes:
1
Refer to Table 4-3 for Allowable Vent and Air-inlet Pipe Sizes and Lengths.
2
PVC venting (exhaust and air-inlet) is not permitted within the Closet/alcove of a Closet/alcove installation.
3
The Air-inlet does not require high temperature pipe material; ABS and PVC Foam Core piping is acceptable. Check
applicable local codes for acceptable materials.
4
ULC S636 PVC is approved for flue gas temperatures up to 149
applications. High temperature applications requiring boiler supply water temperatures greater than 140
use ULC S636 CPVC, PP or SS exhaust venting.
The use of cellular core PVC (ASTM F891), cellular core CPVC, or Radel®
(polyphenolsulfone) in the exhaust venting system is prohibited. Failure to follow these
instructions may result in property damage, personal injury or death.
Covering non-metallic vent pipe and fittings with thermal insulation is prohibited. Failure
to follow these instructions may result in property damage, personal injury or death.
Vent/Air-inlet Pipe Length Determination
Use Table 4-3 to determine the maximum pipe length that can be used. The table calculates 90º elbows, and 45º
elbows at 5 equivalent feet each.
Example: When using 3" pipe, a Tx151 boiler can be installed with 150 equivalent feet of air-inlet piping and
150 equivalent feet of exhaust-vent piping. See Table 4-3 for more details.
Table 4-3 Allowable Vent and Air-inlet Pipe Size and Lengths
Pipe
Model No.
Size
2" 1
Tx51-151 (C)
3"
3"
Tx200 (C)
Note:
1
See WARNING below.
PVC Exhaust Venting – When using 2" PVC venting, the first seven (7) equivalent feet
of exhaust venting must be approved 2" CPVC or 3" PVC; see exceptions in Table 4-2.
Venting System Standards
2, 3
United States
ANSI/ASTM D2265
ANSI/ASTM D1785
ANSI/ASTM F441
UL-1738
-
ANSI/ASTM D2564
ANSI/ASTM F493
ANSI/ASTM F656
Length
Gas
(ft)
1
100 95
NG /
150 145 140
LP
100 95
4
Canada
In Canada, all exhaust
vent material must be
ULC S636 approved.
See Note 4 below for
appropriate temperature
applications.
o o
F (65 C) and must only be used for low temperature
Number of Elbows (90's or 45's) and Equivalent Feet
2 3 4 5
90 85 80 75
135 130 125
90 85 80 75
│General Venting
All Vent and Air-Inlet
materials installed on gas
fired appliances in CAN/US
must meet the specifications
provided in this Table.
Failure to comply could
result in fire, serious injury
or death.
o o
F (60 C) must
6 7 8 9
70 65 60 55
120 115 110 105
70 65 60 55
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