507768-02B
Page 33 of 56
Issue 1904
Exhaust through Crawl Space Vent Option
All 33” condensing gas furnaces (92%+) are now approved
to be vented down through a crawl space. Ensure a vent
pipe drain kit, 51W18 (USA) or 15Z70 (Canada), is used as
directed through the floor joists and into the crawl space.
See the following figures.
Consult the vent tables for vent lengths and approved
materials.
2” or 3”
Sanitary Tee
1/2” PVC
Drain Stub
Drain Trap
Assembly
Rubber Boot (51W18)
Drain Plug (15Z70)
Clamp
(51W18 Only)
From
Furnace
To Vent
Termination
Drain Trap
(assembled)
Figure 49.
Kit 51W18 (USA) / 15Z70 (Canada) Parts
Identification and Assembly
Exhaust from
Furnace
To Termination
Exhaust from
Furnace
To Termination
* Kit 51W18 is shown.
Figure 50. Crawl Space Vent Pipe Drain Trap
Assembled Incorrectly
Figure 51.
Upflow or Downflow Furnace with Exhaust through Crawl Space
KIT 51W18 (USA)
Basement Floor
To Termination
1/2” PVC to
Code-Approved
Drain
24” max.
Downflow Furnace
Exhaust
KIT 15Z70 (Canada)
* Kit 51W18 is shown.
NOTE:
Upflow furnaces exhaust from the left side. All dimensions shown are typical for upflow or downflow furnaces.
NOTE:
All horizontal runs of exhaust pipe must slope back toward the kit a minimum of 1/4” (6mm) for each 12” (305mm) to ensure drainage.
Содержание BG961UHE
Страница 3: ...507768 02B Page 3 of 56 Issue 1904 Figure 1 Parts Arrangement ...
Страница 22: ...507768 02B Page 22 of 56 Issue 1904 Figure 25 Figure 26 ...
Страница 37: ...507768 02B Page 37 of 56 Issue 1904 Figure 59 Trap Drain Assembly Using 1 2 PVC or 3 4 PVC ...
Страница 43: ...507768 02B Page 43 of 56 Issue 1904 Figure 67 Typical Wiring Diagram ...