Roberts Gorden CoRayVac CRV-B-6 - Manual (Page 40)

CRV-S ERIES I NSTALLATION , O PERATION AND S ERVICE M ANUAL
34
9.2 General Venting Requirements Model EP-100,
EP-200 and EP-300 Series Pumps
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.
Any portion of vent pipe passing through a
combustible wall must have an approved thimble
to conform with the above listed codes.
Vent pipe must be sloped downward away from the
pump ¼'' every 10' (3 m).
The bottom of the vent or air intake terminal shall not
be located less than 1
' (0.3 m) above grade level.
The vent shall not terminate less than 7 ' (2.1 m)
above grade where located adjacent to public
walkways.
Vent terminal must be installed at a height sufficient
to prevent blockage by snow, and building materials
protected from degradation by flue gases.
Secure all joints with #8 x 3/8 sheet metal screws.
Seal all joints with high temperature silicone sealant.
Vent terminal must be beyond any combustible
overhang.
9.2.1 United States Requirements
Vent must terminate at least 3 ' (0.9 m) above any
forced air inlet located within 10 ' (3.1 m).
Vent must terminate at least 4 ' (1.2 m) below,
4 ' (1.2 m) horizontally from, or 1 ' (0.3 m) above any
door, operable window, or gravity air inlet into any
building.
9.2.2 Canadian Requirements
The vent shall not terminate within 6 ' (1.8 m) of a
mechanical air supply inlet to any building.
The vent shall not terminate within 3 ' (0.9 m) of a
window or door that can be opened in any building,
any non-mechanical air supply inlet to any building,
or of the combustion air inlet of any other appliance.
9.2.3 Vertical Venting
See Page 35, Figure 17 for recommended vertical
venting options.
9.2.4 Horizontal Venting
See Page 36, Figure 18 through Page 38, Figure 20
for recommended horizontal venting options.
9.2.5 Length Requirements
See Page 35, Figure 17 through Page 38, Figure 20
for recommended vent lengths and sizes.
Seal all pipe joints with high temperature silicone
sealant in the vent pipe. Insulation and additional
sealing measures will be required.
Optional heat exchanger lengths are considered as
vent length for length determination.
Subtract 15' (4.6 m) of maximum allowed vent or
outside air duct length per vent elbow if more than
three are used.
WARNING
Combustion by-products contain a chemical
known to the State of California to cause
cancer and birth defects or other
reproductive harm.