Installation Checklist - A.O. Smith 300 Series Installation And Operating Manual

INSTALLATION CHECKLIST

Note: Use and complete this checklist before lighting the
heater. Correct any conditions that do not meet these
instructions.
Water Heater Location

Centrally located with the water piping system.
Located as close to gas piping and vent pipe system
as possible.

Located indoors and in a vertical position. Protected
from freezing temperatures.

Proper clearances from combustible surfaces main-
tained and not installed directly on a carpeted floor.

Provisions made to protect the area from water
damage. Metal drain pan installed and piped to an
adequate drain.

Installation area free of corrosive elements and flam-
mable material.

Sufficient room to service the water heater.
Gas Supply And Piping

Gas supply is the same type as listed on the water
heater data plate.

Gas line equipped with shut-off valve, union and
sediment trap.

Approved pipe joint compound used.

Adequate pipe size and of approved material.

Chloride-free soap and water solution or other
approved means used to check all connections and
fittings for possible gas leaks.
Vent Pipe System

Vent pipe and fittings of approved material.

Acceptable size, length and number of elbows on
exhaust vent system.

Installed in accordance with prevailing provisions
of local codes, or in the absence of such, the latest
edition of "National Fuel Gas Code", ANSI Z223.1/
NFPA 54.

Horizontal piping slopes at an upward pitch of 1/8"
rise per 5' away from the water heater.

Not obstructed in any way.

Means installed to collect, neutralize (if required) and
dispose of condensate.
100304526_2000545240 _Rev. 01
Vent Termination
Horizontal

12" min. above grade/snow level.

Away from corners, other vents, windows etc.
Vertical

Air Intake and Exhaust terminations 18" min. above
roof/snow level.
Water System Piping

Temperature and Pressure relief valve properly
installed with a discharge line run to an open drain
and protected from freezing.

All piping properly installed and free of leaks.

Heater completely filled with water.

Closed system pressure build-up precautions
installed.
Electrical Connections

Unit connected to a 120V electrical supply. A dedi-
cated circuit is preferred. Do not use a GFI outlet.

Proper polarity.

Water heater properly grounded.

Installed in accordance with prevailing provisions
of local codes, or in the absence of such, the latest
edition of "National Electrical Code" (NFPA 70).
After all actions on checklist are checked/
completed, read the Lighting Instructions and
proceed with lighting the heater.
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