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PLEASE NOTE: SH22 IS FOR OUTDOOR PERMANENT INSTALLATIONS ONLY AND SH22I IS FOR INDOOR PERMANENT INSTALLATIONS ONLY. THIS MANUAL
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Indoor Location
• Installation distances may vary by local code. It is the installer’s responsibility to verify
installation requirements.
• Make sure before installation that the gas type you will use is the same type on the data
plate.
• The water heater unit should be installed by professionals. Improper installation may
cause failure or dangerous conditions such as gas leaking or explosion.
• Water heater cannot be installed in an UN-VENTED bathroom, bedroom, basement, living
room, closet, outdoor, stairway or an exit area. If installed in an exit area, it must be at
least 16.5 ft. or more away from the exit.
• Vent pipe should extend from the wall at least 2”. The terminal must be at least 1.64 ft.
away from obstruction and must be well vented.
• Vent pipe should slope 3° downward, to avoid condensing water and protect from rain
entering.
• Vent pipe should avoid direct, strong wind because the downdraft will cause malfunction.
• The water heater should be installed far from any blockage, and with plenty of enough
space for installation and maintenance. Adequate clearances for servicing must be
provided.
• The water heater should not be installed in the same room with a gas stove .
• When determining the floor clearance, a clearance of 12 inches must be maintained
between the vent pipe and combustible material. A side wall clearance of 10 inches and a
top clearance of 16 inches must be maintained.
• The vent pipe can be up to 32 ft. in length with one elbow.
• The vent pipe should be installed with a flame retardant wall thimble. Owner must refer to
vent manufacturer’s instructions and specifications. Z-Flex information can be found at
www.novaflex.com, please refer to page 31 for additional links. Installation guidelines for
venting provided by NovaFlex, who is solely responsible for venting installation accuracy.
• The power socket connecting the water heater should be grounded properly with a GFCI
circuit protector.
• The water heater should not be located in an area where leakage of the heat exchanger
or connections will result in damage to the area adjacent to it or to lower floors of the
structure.When such areas cannot be avoided it is recommended that a suitable catch
pan, adequately drained, must be installed under the water heater. The pan must not
restrict combustion airflow.
• The water heater should be installed as close as practical to the vent termination to
minimize vent length and the number of elbows required for venting.
• A gas fired water heater or any other appliance should not be installed in a space where
liquids which give off flammable vapors are to be used or stored. Such liquids include
gasoline, LPG (butane or propane), paint or adhesives and their thinners, solvents or
removers.
• The water heater should be installed far from heat sources, flammable and dangerous
materials. Because of natural air movement in a room or other enclosed space, flammable
vapors can be carried some distance from where their liquids are being used or stored. The
open flame of the water heater’s main burner can ignite these vapors causing an explosion
or fire which may result in severe burns, death or property damage.
Installing the SH22i Water Heater
