Use and Care Manual

LP-436 Rev. 5.2.18
10
DO NOT modify the ue damper / drafthood assembly in any way.
DO NOT turn on the electrical power to the water heater until the
ue damper / drafthood assembly is installed. Failure to follow these
instructions can result in property damage, personal injury, or death.
When installing the water heater, make sure the location allows clear
viewing of the ue damper. When the damper is in the open position,
the paddle is perpendicular to the water heater. The ue damper must
be in an open position when the water heater’s burners are operating.
To install the ue damper/drafthood assembly, use the following
instructions and secure all pieces with the provided sheet metal
screws. See Figure 9.
1. Remove the ue damper/drafthood assembly from its
packaging.
2. Center the assembly over the ue collector outlet.
3. Rotate the assembly so that the wire connector on the water
heater can plug into the ue damper motor connector.
4. Use the wire connector to secure the assembly to the ue
connector.
5. Install the ue damper support leg on the assembly.
6. Secure the assembly to the top of the water heater.
7. Plug the wire connector on the water heater into the ue
damper motor connector.
Figure 9 - Flue Damper / Drafthood Assembly
2. Venting System
The venting system must be attached to the drafthood to connect the
water heater to the gas vent or chimney. The vent pipe connecting
the water heater must be of the same size as the drafthood outlet. It is
highly recommended to install this water heater on a 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 ow 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 10.
• 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, conned space, or
any oor.
• The vent piping must be accessible for inspection, cleaning,
and replacement.
Figure 10 - Power Vent Kit Installation
3. Optional Side Wall Power Vent Kits
This water heater is approved for installation with a TjernlundTM side
wall power vent kit. See Figure 10. This kit can be installed as part of
a new installation or retrotted onto an existing installation. The kit
consists of a power venter and vent termination assembly. See Table
5 and Figure 12. 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 Tables 5 and 6. Make sure that
the water heater is located so all vent terminal clearances will be
respected. See Figure 11. 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.
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.