State GS6 75 URRBS - Manual (Page 7)

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you must take special precautions. In addition to using the lowest
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. Mixing valves are
available at plumbing supply or hardware stores. Consult a qualifi ed
installer or service agency. Follow mixing valve manufacturer’s
instructions for installation of the valves. Before changing the factory
setting on the thermostat, read the “Temperature Regulation” section
in this manual, see Figures 15 and 16.
FACTS TO CONSIDER ABOUT THE LOCATION
The water supply pressure should not exceed 80 psi (551.58 kPa).
If this occours, a pressure reducing valve with a bypass should be
installed in the cold water inlet line. This should be placed on the
supply to the entire house in order to maintain equal hot and cold
water pressures.
Carefully choose an indoor location for the new water heater, because
the placement is a very important consideration for the safety of the
occupants in the building and for the most economical use of the
appliance. This water heater is not for use in manufactured
(mobile) homes or outdoor installation.
Whether replacing an old water heater or putting the water heater
in a new location, the following critical points must be observed:
1. Select a location indoors as close as practical to the gas vent or
chimney to which the water heater vent is going to be connected,
and as centralized with the water piping system as possible.
2. Selected location must provide adequate clearances for servicing
and proper operation of the water heater.
Installation of the water heater must be accomplished in such a manner
that if the tank or any connections should leak, the fl ow will not cause
damage to the structure. For this reason, it is not advisable to install
the water heater in an attic or upper fl oor. When such locations cannot
be avoided, a suitable metal drain pan should be installed under the
water heater. Metal drain pans are available at your local hardware
store. Such a metal drain pan must have a minimum length and
width of at least 2” (51 mm) greater than the water heater dimensions
and must be piped to an adequate drain. The pan must not restrict
combustion air fl ow.
Water heater life depends upon water quality, water pressure and
the environment in which the water heater is installed. Water heaters
are sometimes installed in locations where leakage may result in
property damage, even with the use of a drain pan piped to a drain.
However, unanticipated damage can be reduced or prevented by
a leak detector or water shut-off device used in conjunction with a
piped drain pan. These devices are available from some plumbing
supply wholesalers and retailers, and detect and react to leakage
in various ways:
• Sensors mounted in the drain pan that trigger an alarm or turn off
the incoming water to the water heater when leakage is detected.
• Sensors mounted in the drain pan that turn off the water supply
to the entire home when water is detected in the drain pan.
• Water supply shut-off devices that activate based on the water
pressure differential between the cold water and hot water pipes
connected to the water heater.
• Devices that will turn off the gas supply to a gas water heater
while at the same time shutting off its water supply.
LOCATING THE NEW WATER HEATER
INSTALLATIONS IN AREAS WHERE FLAMMABLE LIQUIDS
(VAPORS) ARE LIKELY TO BE PRESENT OR STORED (GARAGES,
STORAGE AND UTILITY AREAS, ETC.): Flammable liquids (such as
gasoline, solvents, propane [LP or butane, etc.] and other substances
such as adhesives, etc.) emit fl ammable vapors which can be ignited
by a gas water heater’s pilot light or main burner. The resulting
fl ashback and fi re can cause death or serious burns to anyone in
the area, as well as property damage. If installation in such areas
is your only option, then the installation must be accomplished in a
way that the pilot fl ame and main burner fl ame are elevated from
the fl oor at least 18 inches. While this may reduce the chances of
fl ammable vapors, from a fl oor spill being ignited, gasoline and other
fl ammable substances should never be stored or used in the same
room or area containing a gas water heater or other open fl ame or
spark producing appliance. NOTE: Flammable vapors may be drawn
by air currents from other areas of the structure to the appliance.
Also, the water heater must be located and/or protected so it is not
subject to physical damage by a moving vehicle.