Sears 153.33645 - Manual (Page 14)

Installation Instructions (cont’d)
Venting (cont’d) Gas Piping
All vent gases must be completely vented to the outdoors of the
structure (dwelling). Install only the draft hood provided with
the new water heater and no other draft hood.
Vent pipes must be secured at each joint with sheet metal
screws.
TO
CHIMNEY
MIN, /, INCH
RISE PER LINEAR
FOOT
VENT PIPE INSTALLATION
AWARNINC
Make sure the gas supplied is the same type listed on the
model rating plate. The inlet gas pressure must not exceed
14 inches water column 'A pound per square Inch (3.5kPa).
The minimum inlet gas pressure listed on the model rating
plate is for the purpose of input adjustment.
AWARNÎNG
If the gas control valve is subjected to pressures exceeding 'A
pound per square inch (3JkPa), the damage to the gas con­
trol valve could result in a fire or explosion from leaking gas.
There must be a minimum of 6" clearance between single wall
vent pipe and any combustible material. Fill and seal any clear­
ance between single wall vent pipe and combustible material
■with mortar mix, cement, or other noncombiistibie substance.
For other than single wall, follow vent pipe manufacturer’s clear­
ance specifications. To insure a tight fit of the vent pipe in a
brick chimney, seal around the vent pipe with mortar mix
cement.
AWARNING
Failure to have required clearances between vent piping and
combustible material will result in a fire hazard.
AWARNING
Be sure vent pipe is properly connected to prevent escape of
dangerous flue gases which could cause deadly asphyxiation.
AWARNING
Chemical vapor corrosion of the flue and vent system may
occur if air for combustion contains certain chemical vapors.
Spray can propellants, cleaning solvents, refrigerator and air
conditioner refrigerants, swimming pool chemicals, calcium
and sodium chloride, waxes, bleach, and process chemicals are
typical compounds which are potentially corrosive.
AWARNING
If the main gas line shutoff serving all gas appliances is used,
also turn “OFF” the gas at each appliance. Leave all gas appli­
ances shut off until the water heater installation is complete.
A gas line of sufficient size must he run to the water heater.
Consult the latest edition of National Fuel Gas Code ANSI
Z223.1, also referred to as NFPA54 and the gas company con^
ceming pipe size.
There must ber
• A readily accessible manual shut off valve in the gas supply line
serving the water heater, and
• A drip leg (sediment trap) ahead of the gas control valve to help
prevent dlit and foreign materials from entering the gas control
valve.
• A flexible gas connector or a ground joint union between the
shutoff valve and control valve to permit servicing of the unit.
Be sure to check all the gas piping for leaks before lighting the
water hearer. Use a soapy water solution, not a match or open
flame. Rinse off soapy solution and wipe dry.
Standard Models are for instaUation up to 3,300 feet above sea
level.
High Altitude Models are for installation from 3,300 to 5,500
feet above sea level.
If a standard model is instaUed above 3,300 feet or a high altitude
model is installed above 5,500 feet, the input raring must be
reduced at the rate of 4 percent for each 1,000 feet above sea level.
Contact your local Scars Service Center or gas utility for further
information.
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