7
Page
INSTALLATION
GENERAL
1.
Follow all local codes, or in the absence of local codes, follow the current edition of the National Fuel
Gas Code: ANSI Z223.1/NFPA 54 in the USA or B149.1 Natural Gas and Propane Installation Code in
Canada.
2.
All gas water heaters require careful and correct installation to ensure safe and efficient operation.
This manual must be followed exactly. Read the “Safety Guidelines” section.
3.
The manifold gas pressure is preset at the factory. It is computer controlled and should not need
adjustment.
4.
Maintain proper space for servicing. Install the unit so that it can be connected or removed easily.
Refer to the "Clearances" section on p. 9 for proper clearances.
5.
The water heater must be installed in a location where the proper amount of combustible air will be
available to it at all times without obstructions.
6.
Electrical service to the water heater requires a means of disconnection. This will allow power to the
water heater to be shut off for servicing and safety purposes.
7.
Do not install the unit where the exhaust vent is pointing into any opening in a building or where the
noise may disturb your neighbors. Ensure that the vent termination meets the minimum distance
requirements set by code, including minimum clearances from doorways or openings. (Refer to pp.23
to 25.)
8.
Carefully plan the installation location of the heater and vent terminations. Contaminants such as
aerosols, lint, and fine powders (including flour) can clog the air intake and reduce the operation of the
fan. This, in turn, can cause improper combustion and reduce the life of the water heater. Regularly
ensure that the area around the water heater, vent termination, and air intake is free of dust, debris,
and other contaminants. In environments with a high level of contaminants (laundry facilities, hair
salons, pet salons, chemical plants, commercial kitchens, etc.), direct venting is required.
9.
For 110U Indoor, 310U Indoor, and 510U Indoor models:
•
If the water heater is used as a direct-vent appliance, the unit requires a 3 in. (76 mm)
combustible air supply pipe. The intake pipe must be sealed airtight. Refer to "VENTING
INSTRUCTIONS" on p.13 for more detail.
•
Terminating the venting through a sidewall is recommended for the direct-vent system.
•
Running the exhaust vent and the intake pipe parallel is recommended.
•
Terminating the exhaust and intake on the same wall/surface is recommended. Terminating in
the same pressure zone allows for pressure balancing, which prevents nuisance shutdowns.
•
Only install the water heater in a heated area where below freezing temperatures cannot occur.
The warranty does not cover damage caused by freezing.
•
The water heater must be securely mounted to a wall or other suitable structure.
10.
The 110U Outdoor, 310U Outdoor, and 510U Outdoor models are only to be installed outdoors and
only in an area with mild, temperate climates. The Outdoor model shall be wall mounted, mounted
on a stand, or installed in an approved recess box. Locate the Outdoor model in a open, unroofed area
and maintain the minimum clearances. (Refer to p.11.)
Installation
Installation Manual
