Installing The New Water Heater; Water Piping - A.O. Smith Residential Power Vent Gas Water Heaters with Hot Surface Ignition Instruction Manual

Installing the New Water Heater

Water Piping

WARNING
HOTTER WATER CAN SCALD: Water heaters are intend-
ed to produce hot water. Water heated to a temperature
which will satisfy clothes washing, dish washing, and
other sanitizing needs can scald and permanently injure
you upon contact. Some people are more likely to be per-
manently injured by hot water than others. These include
the elderly, children, the infirm, or physically/mentally
handicapped. If anyone using hot water in your home fits
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 lowest possible temperature setting
that satisfies your hot water needs, some type of temper-
ing device, 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. Follow manufacturers instructions for
installation of the valves. Before changing the factory set-
ting on the thermostat, read the "Temperature
Regulation" section in this manual.
This water heater shall not be connected to any heating
systems or component(s) used with a non-potable water
heating appliance.
If a water heater is installed in a closed water supply sys-
tem; such as one having a back-flow preventer, check
valve, water meter with a check valve, etc... in the cold
water supply; means shall be provided to control thermal
expansion. Contact the water supplier or plumbing con-
tractor on how to control this situation.
NOTE: To protect against untimely corrosion of hot and
cold water fittings, it is strongly recommended that dielec-
tric unions or couplings be installed on this water heater
when connected to copper pipe.
The illustration shows the attachment of the water piping to
the water heater. The water heater is equipped with
water connections for 40 and 50 gallon models and 1 inch
water connections for 75 gallon models.
NOTE: If using copper tubing, solder tubing to an adapter
before attaching the adapter to the cold water inlet con-
nection. Do not solder the cold water supply line directly
to the cold water inlet or it will harm the dip tube.
NOTE: This water heater is insulated to minimize heat loss
from the tank. Further reduction in heat loss can be
accomplished by insulating the hot water lines from the
water heater.
VENT TO
OUTDOORS
HOT OUTLET
TO HOUSE
DISCHARGE PIPE
(Do not cap or plug)
PROVIDE A 6" AIR
GAP BETWEEN THE
END OF THE
DISCHARGE PIPE
AND DRAIN
/ inch
3
4
11
SHUTOFF
VALVE
TEMPERATURE-
PRESSURE RELIEF
GAS SUPPLY
COLD INLET
WATER LINE
VALVE