Water Piping - Mixing Valve Usage; Mixing Valves - A.O. Smith 300 Series Installation And Operating Manual

WATER PIPING - MIXING VALVE USAGE

Mixing Valves

DANGER
HOT
HOT
BURN
Water heated to a temperature which satisfies space
heating, clothes washing, dish washing, and other
sanitizing needs can scald and cause permanent injury
upon contact. Short repeated heating cycles caused by
small hot-water uses can cause a temperature increase of
the hot water by 20F° higher than the heater's temperature
settings.
TEMPERED
POTABLE WATER
MIXING
VALVE *
TEMPERATURE-
PRESSURE
RELIEF VALVE
DISCHARGE
PIPE (DO
NOT CAP OR
PLUG)
DRAIN
VALVE
* (MUST BE INSTALLED BELOW TOP OF WATER HEATER AS PER
MANUFACTURER'S RECOMMENDATIONS)
MASSACHUSETTS: INSTALL A VACUUM RELIEF IN COLD WATER LINE
PER SECTION 19 MGL 142.
Figure 7.
100304526_2000545240 _Rev. 01
Water temperature over
125°F can cause severe
burns instantly resulting in
severe injury or death.
Children, the elderly and the
disabled are at highest risk
of scald injury.
Feel water before bathing or
showering.
Temperature limiting valves
are available.
Read instruction manual for
safe temperature setting.
SUGGESTED PIPING ARRANGEMENT
FOR SIDE CONNECTIONS
SHUT-
OFF
VALVE
COLD-WATER
INLET
CERTAIN
MODELS ARE
EQUIPPED WITH
SIDE PLUMBING
CONNECTIONS FOR
SPACE HEATING.
THE HOT AND
COLD FITTING
ASSEMBLIES (PART
# 100108524) CAN
BE ORDERED
THROUGH THE
MANUFACTURER
METAL DRAIN
PAN 1.75" MAX.
DEPTH. AT LEAST 2"
GREATER THAN THE
DIAMETER OF THE
WATER HEATER.
6" MAX. AIR
GAP*
www.hotwater .com
This appliance has been design certified as complying with
ANSI/CSA Standard for water heaters and are considered
suitable for combination Water (Potable) Heating and
Space Heating but not space heating only applications.
The water supply pressure should not exceed 80 psi. If this
occurs, 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.
TEMPERED
POTABLE
WATER
NON-TEMPERED
WATER SUPPLY
SUGGESTED PIPING
ARRANGEMENT FOR
TOP CONNECTIONS
TEMPERATURE-
PRESSURE
RELIEF VALVE
DISCHARGE
PIPE (DO NOT
CAP OR PLUG)
DRAIN
VALVE
* (MUST BE INSTALLED BELOW TOP OF WATER HEATER AS PER
MANUFACTURER'S RECOMMENDATIONS)
MASSACHUSETTS: INSTALL A VACUUM RELIEF IN COLD WATER LINE
PER SECTION 19 MGL 142.
Figure 8.
TEMPERED
POTABLE WATER
NON-
TEMPERED
WATER
SUPPLY
TO HOT
OUTLET
* (MUST BE INSTALLED BELOW TOP OF WATER HEATER
AS PER MANUFACTURER'S RECOMMENDATIONS)
Figure 9.
SHUT-
OFF
VALVE
COLD-WATER
INLET
NON-TEMPERED
WATER RETURN
MIXING VALVE *
METAL DRAIN
PAN 1.75"
MAX. DEPTH.
AT LEAST 2"
GREATER
THAN THE
DIAMETER OF
THE WATER
HEATER.
6" MAX. AIR
GAP*
SHUT-OFF
VALVE
MIXING
COLD-WATER
VALVE *
SUPPLY
NON-TEMPERED
WATER RETURN
TO COLD
INLET
11