Service manual

SECTION 9: VENTING
19 of 33
SECTION 9: VENTING
9.1 Venting
This heater must be vented in accordance with the
rules contained in this manual and with the following
national codes and any state, provincial or local
codes which may apply:
United States: Refer to National Fuel Gas Code
NFPA 54/ANSI Z223.1 - latest revision.
Canada: Refer to Natural Gas and Propane
Installation Code CSA B149.1 - latest revision.
This section provides partial information about this
specification with regard to size and configuration for
venting requirements. See Page 20, Figure 18 and
Page 21, Figure 19. However, to provide assurance
of proper and safe operation, it is the responsibility of
the installer to make sure the installation is in strict
accordance with all local and national codes.
9.2 Venting the Pump
• The exhaust connection from the pump is 6" (15
cm) diameter.
• Connect the 6" (15 cm) pump boot (provided) to
the 6" (15 cm) flue pipe, using the 6" (15 cm)
band clamp provided.
• Venting from the pump may discharge either hori-
zontally or v
ertically. Horizontal discharge is
preferred. See Page 20, Figure 18. Vertical dis-
charge must be arranged as shown on Page 21,
Figure 19. Corrosion resistant pipe is required.
• Both horizontal and vertical venting must be sup-
ported by suitable hangers.
• Vent lengths are allowed as follows:
9.3 Vent Material Recomendations
Vent recommendations in order of preferred use:
1. Porcelain coated tubing 4" (10 cm) O.D. (P/N
9141030D)
2. Heat treated aluminized tubing 4" (10 cm) O.D.
(P/N 91409408)
Heat treated aluminized tubing 6" (15 cm) O.D.
(P/N E0009105)
3. Single wall flue pipe - minimum 26 ga.
(Not suitable for modulating and condensing
system designs.)
9.4 Horizontal Venting
If using vent lengths greater than 20' (6 m), conden-
sation will form in the vent pipe. Insulation and addi-
tional sealing measures will be required.
• Vent must exit building not less than 7' (2 m)
above grade when located adjacent to public
walk
ways.
• Vent must terminate at least 3' (1 m) above any
forced air inlet located within 10' (3 m).
• Vent must terminate at least 4' (1.2 m) below 4'
(1.2 m) horizontally from or 12" (30 cm) above any
door, window or gravity air inlet into building.
WARNING
Carbon Monoxide Hazard
Pump must be vented to the outside.
Heaters must be installed according to the
installation manual.
Failure to follow these instructions can result
in death or injury.
WARNING
Cut/Pinch Hazard
Wear protective gear during installation,
operation and service.
Edges are sharp.
Failure to follow these instructions can result
in injury.
VENT LENGTH VENT SIZE
Up To 10' (3 m) 6" (15 cm) vent - 1 elbow
Up To 25' (8 m) 7" (18 cm) vent - 3 elbow
Up To 50' (15 m) 8" (20 cm) vent - 3 elbow