Installation Sheet

14 Page
-DIPswitch settings for Vent length-
-Exhaust vent (PVC and ABS vent)-
TheDirectVentIndoormodelscanbeconnectedwithPVCorABSventing(temperatureratedupto149
°F).However,themanufacturerrecommendsPVC(orABS)ventingcertifiedtoULCS636standards.
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
Pipe Cement/Primer
PVC ANSI/ASTM D2564
CPVC ANSI/ASTM F493
ABS ANSI/ASTM D2235
NOTE: Do NOT Use Cellular Foam Core Pipe
4" ventings
240 Indoor (T-H3J-DV)
340 Indoor (T-H3S-DV)
540 Indoor (T-H3-DV)
(Upper bank of DIPswitches)
Vent length
No. 6 : ON
No. 7 : OFF
No. 3 : ON
No. 4 : OFF
5 to 50 ft
(DEFAULT)
No. 6 : OFF
No. 7 : OFF
No. 3 : OFF
No. 4 : OFF
51 to 100 ft
OFF
ON
1 2 3 4 5 6 7 8
OFF
ON
1 2 3 4 5 6 7 8
OFF
ON
1 2 3 4 5 6 7 8 9 10
OFF
ON
1 2 3 4 5 6 7 8 9 10
3" ventings
240 Indoor (T-H3J-DV)
340 Indoor (T-H3S-DV)
540 Indoor (T-H3-DV)
(Upper bank of DIPswitches)
Vent length
No. 6 : ON
No. 7 : OFF
No. 3 : ON
No. 4 : OFF
5 to 20 ft
(DEFAULT)
No. 6 : OFF
No. 7 : OFF
No. 3 : OFF
No. 4 : OFF
21 to 40 ft
No. 6 : ON
No. 7 : ON
No. 3 : ON
No. 4 : ON
41 to 70 ft
OFF
ON
1 2 3 4 5 6 7 8
OFF
ON
1 2 3 4 5 6 7 8
OFF
ON
1 2 3 4 5 6 7 8 9 10
OFF
ON
1 2 3 4 5 6 7 8 9 10
OFF
ON
1 2 3 4 5 6 7 8
OFF
ON
1 2 3 4 5 6 7 8 9 10
Set DIPswitches shown in the table below depending on the vent length.