Installing The New Water Heater; Required Ability; Inspect Shipment; General - A.O. Smith GDV Instruction Manual

REQUIRED ABILITY

INSTALLATION OR SERVICE OF THIS WATER HEATER
REQUIRES ABILITY EQUIVALENT TO THAT OF A LICENSED
TRADESMAN IN THE FIELD INVOLVED. PLUMBING, AIR
SUPPLY, VENTING AND GAS SUPPLY ARE REQUIRED.

INSPECT SHIPMENT

There may be hidden damage caused in transit. Check to be cer-
tain all parts of the venting system, as listed below, are present.
CAUTION!!! IF THERE ARE ANY DAMAGED PARTS, DO NOT
INSTALL THIS WATER HEATER. REPORT ANY SHORTAGE
TO YOUR DISTRIBUTOR OR DAMAGE TO YOUR CARRIER.

GENERAL

The installation must conform to these instructions and the lo-
cal code authority having jurisdiction. In the absence of local
codes, the installation must comply with the current edition of
the National Fuel Gas Code ANSI Z223.1/NFPA 54. The code is
available from the Canadian Standards Association, 8501 East
Pleasant Valley Road, Cleveland, OH 44131.

WATER PIPING

HOTTER WATER CAN SCALD:
Water heaters are intended to produce hot water. Water heated
to a temperature which will satisfy space heating, clothes wash-
ing, dish washing, cleaning and other sanitizing needs can scald
and permanently injure you upon contact. Some people are
more likely to be permanently injured by hot water than others.
These include the elderly, children, the infi rm, or physically/men-
tally handicapped. If anyone using hot water in your home fi ts
into one of these groups or if there is a local code or state law
requiring a certain temperature water at the hot water tap, then
you must take special precautions. In addition to using the low-
est possible temperature setting that satisfi es your hot water
needs, a means such as a *mixing valve, should be used at the
hot water taps used by these people or at the water heater, see
Figure 2. Valves for reducing point of use temperature by mixing
cold and hot water are also available:
Consult a Qualifi ed Installer or Service Agency. Follow manufac-
turer's instructions for installation of the valves. Before changing
the factory setting on the thermostat, read the "Temperature
Regulation" section in this manual.

INSTALLING THE NEW WATER HEATER

This water heater shall not be connected to any heating systems
or component(s) used with a non-potable water heating appli-
ance.
All piping components connected to this unit for space heating
applications shall be suitable for use with potable water.
Toxic chemicals, such as those used for boiler treatment shall
not be introduced into this system.
When the system requires water for space heating at tempera-
tures higher than required for domestic water purposes, a mixing
valve must be installed. Please refer to Figure 2 for suggested
piping arrangement.
Water supply systems may, because of such events as high line
pressure, frequent cut-offs, the effects of water hammer among
others, have installed devices such as pressure reducing valves,
check valves, back fl ow preventers, etc. to control these types of
problems. When these devices are not equipped with an internal
by-pass, and no other measures are taken, the devices cause
the water system to be closed.
As water is heated, it expands (thermal expansion). In a closed
system, the volume of water will grow. As the volume of water
grows, there will be a corresponding increase in water pressure
due to thermal expansion. Thermal expansion can cause pre-
mature tank failure (leakage). This type of failure is not covered
under the limited warranty. Thermal expansion can also cause
intermittent temperature-pressure relief valve operation: water
discharged from the valve due to excessive pressure build up.
The temperature-pressure relief valve is not intended for
the constant relief of thermal expansion. This condition is not
covered under the limited warranty.
A properly-sized thermal expansion tank should be installed
on all closed systems to control the harmful effects of thermal
expansion. Contact a plumbing service agency or your retail sup-
plier regarding the installation of a thermal expansion tank.
NOTE: To protect against untimely corrosion of hot and cold
water fi ttings, it is strongly recommended that di-electric
unions or couplings be installed on this water heater when
connected to copper pipe.
All gas piping must comply with local codes and ordinances or
with the current edition of the National Fuel Gas Code ANSI
Z223.1/NFPA 54 whichever applies. Copper and brass tubing
and fi ttings (except tin lined copper tubing) shall not be used.
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