A.O. Smith 186589-004, Instruction Manual

Page: 6 / 31

6
FIGURE 2
MIXING VALVE USAGE
This appliance has been design certi fi ed as complying with
American National Standard/CSA Standard for water heaters
and is considered suitable for:
Water (Potable) Heating and Space Heating: All models are
considered suitable for water (potable) heating and space heat-
ing.
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, 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 in
fi rm, or physically/mentally
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 requir-
ing a certain temperature water at the hot water tap, then you
must take special precautions. In addition to using the lowest
possible temperature setting that satis
fi 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. Mix-
ing valves are available at plumbing supply or hardware stores.
Consult a Quali
fi 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.
DRAIN VALVE
TEMPERED POTABLE WATER
TEMPERATURE-PRESSURE
RELIEF VALVE
TO SUITABLE DRAIN
NON-TEMPERED WATER RETURN
COLD WATER INLET
DISCHARGE PIPE
(DO NOT CAP
OR PLUG)
DRAIN PAN
GAS SUPPLY
NON-TEMPERED WATER SUPPLY
SUGGESTED PIPING
ARRANGEMENT FOR
TOP CONNECTIONS
SHUT-OFF VALVE
NON-SCALD
TEMPERING VALVE
(*ALSO CALLED MIXING VALVE)
6” MAXIMUM
AIR GAP
CERTAIN MODELS ARE EQUIPPED WITH
SIDE PLUMBING CONNECTIONS FOR
SPACE HEATING.