TK-540P Installation Manual

15 Page
-Exhaust vent (ABS, PVC, CPVC, or polypropylene vent)-
The Indoor models can be vented with ABS, PVC, CPVC, or polypropylene (temperature rated up to
149°F).VentmaterialcertifiedtoULCS636standardsisrecommendedintheUSA.InCanada,plastic
ventingmustbecertifiedtoULCS636standards.
• Themaximumlengthofexhaustventpipingmustnotexceed70ft.(21.3m)for3”venting,which
dependsontheelevationwherethewaterheaterisinstalled,and100ft.(30.5m)for4”venting
(deducting5ft.(1.5m) foreachelbowusedintheventingsystem).Donotusemorethan5
elbows. See the table below.
• Whenthehorizontalventrunexceeds5ft.(1.5m),supporttheventrunat3ft.(0.9m)intervals
with overhead hangers.
Installaon
Installaon Manual
Item Material United States Canada
Exhaust pipe and
Fittings
Schedule 40 PVC ANSI/ASTMD1785
ULCS636Certified
Materials Only
PVC-DWV ANSI/ASTMD2665
Schedule 40 CPVC ANSI/ASTMF441
Schedule 40 ABS-DWV ANSI/ASTMD2661
Polypropylene UL-1738
Pipe Cement/Primer
PVC ANSI/ASTMD2564
CPVC ANSI/ASTMF493
ABS ANSI/ASTMD2235
NOTE: Do NOT Use Cellular Foam Core Pipe
Diameter Max. No. of Elbows Max. Vertical and Horizontal (Total) Vent Length
3in.(76mm) 5 70ft.(21.3m)
4in.(102mm) 5 100ft.(30.5m)
*For each elbow added, deduct 5 ft. (1.5 m) from max. vent length.
No. of Elbows
Max. Vertical or Horizontal (Total) Vent Length
3" venting 4" venting
0 to 3,000 ft 3,001 to 6,000 ft 6,001 to 10,100 ft 0 to 10,100 ft
0 70ft.(21.3m) 40ft.(12.2m) 25ft.(7.6m) 100ft.(30.5m)
1 65ft.(19.8m) 35ft.(10.7m) 20ft.(6.1m) 95ft.(29.0m)
2 60ft.(18.3m) 30ft.(9.1m) 15ft.(4.6m) 90ft.(27.4m)
3 55ft.(16.8m) 25ft.(7.6m) 10ft.(3.0m) 85ft.(25.9m)
4 50ft.(15.2m) 20ft.(6.1m) N/A 80ft.(24.4m)
5 45ft.(13.7m) N/A N/A 75ft.(22.9m)
Excludes vent terminators, termination elbows, or rain caps.
Fordetailsontheventconnection,refertop.16andp.17.