HTP CG300N65 User Manual
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LP-436 REV. 3.21.14
separate venting system from other appliances. In some installations, proper venting may require the use of a larger diameter vent pipe
and/or combined venting with other appliances. Consult the vent tables in the ANSI Z223.1/NFPA 54 in the United States, of CAN/CSA
B149.1 National Gas and Propane Installation Code, in Canada, to correctly size the vent pipe.
When connecting the vent pipe to the water heater, the following instructions must be followed:
Install the vent pipe in such a way as to avoid any unnecessary bends that could create resistance to the flow of combustion
gases.
The length of the horizontal vent pipe must not exceed 75% of the vertical vent pipe height and never exceed 20’ (6.1 m).
All horizontal runs must have a minimum rise of ¼” (21 mm/m) per foot of run. See Figure 7.
All joints must be securely fastened with sheet metal screws or other approved means.
All single wall vent piping must maintain a minimum of 6” (15.2 cm) of clearance from combustible materials.
Venting systems made with single wall piping cannot pass through any attic, inside wall, crawl space, confined space, or any
floor.
The vent piping must be accessible for inspection, cleaning, and replacement.
Optional Side Wall Power Vent Kits
When using an optional power vent kit, the power venter must be properly secured against the outside wall. Failure to properly secure
the power venter can result in exhaust gas leak, property damage, personal injury, or death.
This water heater is approved for installation with a Tjernlund
TM
side wall power vent kit. See Figure 7. This kit can be installed as part
of a new installation or retrofitted onto an existing installation. The kit consists of a power venter and vent termination assembly. See
Table 2 and Figure 9. Vent piping is not included. Before beginning the installation of the power vent kit, make sure that it is the
appropriate kit for your model water heater. See Table 2. Make sure that the water heater is located so all vent terminal clearances will
be respected. See Figure 8.
Maximum equivalent vent pipe length is 50’ for each model. For complete instructions on the side wall vent
kit installation, consult the manual that comes with the kit.