John Wood Commercial - AJWSC - Manual (Page 17)

INSTALLATION CHECKLIST
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Water Heater Location
1. Centrally located with the water piping system.
Located as close to the gas piping and vent pipe
system as possible.
2. Located indoors and in a vertical position.
Protected from freezing temperatures.
3. Proper clearances from combustible surfaces
maintained and not installed directly on a carpet-
ed floor.
4. Sufficient room to service the water heater.
5. Provisions made to protect the area from water
damage. Properly sized drain pan installed and
piped to an adequate drain.
6. Installation area free of corrosive elements and
flammable materials.
Gas Supply and Piping
1. Gas supply is the same type as listed on the
water heater data plate.
2. Gas line equipped with full opening shut-off
valve, union and drip leg.
3. Approved pipe joint compound used.
4. Adequate pipe size and of approved material.
5. Chloride-free soap and water solution or other
approved means used to check all connections
and fittings for possible gas leaks.
6. Rating tag of flexible gas connector (if used),
matches or exceeds the input of the water heater.
Vent Pipe System
1. Vent pipe and fittings of approved material.
2. Acceptable size, length, and number of elbows
on exhaust outlet pipe.
3. Installed in accordance with prevailing provisions
of local codes, or in the absence of such, the lat-
est edition of “Natural Gas and Propane
Installation Code” CAN/CSA-B149.1 (Canada),
or “National Fuel Gas Code” ANSI Z223.1
(NFPA 54) (U.S.A.).
4. Vent connectors securely fastened with screws
and supported properly to maintain 152mm (6 in.)
clearance.
5. Drafthood and damper properly installed.
6. Drafthood or vent pipe not obstructed in any way.
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Vent Termination
Vertical
1. Vertical gas vents terminated with a listed cap or
other roof assembly and installed according to
their manufacturer’s instructions.
Water System Piping
1. Temperature and pressure relief valve properly
installed with a discharge line run to an open
drain and protected from freezing.
2. All piping properly installed and free of leaks.
3. Water heater completely filled with water.
4. A properly sized expansion tank installed on
closed system.
5. A tempering valve installed as per the manufac-
turer’s instructions.
Electrical Connections
1. Unit “hard-wired” to a dedicated 120V power sup-
ply.
2. Proper polarity.
3. Water heater properly grounded.
4. Installed in accordance with prevailing provisions
of local codes, or in the absence of such, the lat-
est edition of “Canadian Electrical Code
(CAN/CSA C22.1), Part I” (Canada) or
“National Electrical Code” (NFPA 70)”
(U.S.A.).
If the answer to all of the questions
above is “Yes”, proceed with lighting
the heater.