Hatco pmg-60m-0705(7) User Manual
Form No. PMG-60M-0705
9
INSTALLATION
Pressure And Temperature Relief Valves
For protection against excessive pressures and
temperatures in the booster heater, install
temperature and pressure protective equipment by
local codes. Hatco supplies valves constructed with
brass working parts and heat resistant silicone seat
discs for all booster heater models.
For protection against excessive pressures and
temperatures in the booster heater, install
temperature and pressure protective equipment by
local codes. Hatco supplies valves constructed with
brass working parts and heat resistant silicone seat
discs for all booster heater models.
WARNING
Valves supplied by Hatco are designed for
high temperature commercial operation. Do
not substitute Hatco valves with valves
designed for domestic water heaters.
high temperature commercial operation. Do
not substitute Hatco valves with valves
designed for domestic water heaters.
Temperature/pressure protective equipment
should not be less than a combination
temperature/pressure relief valve certified by a
nationally recognized testing laboratory that
maintains periodic inspection of the
production of this equipment and meets the
requirements for Relief Valves and Automatic
Shutoff Devices for Hot Water Supply
Systems, ANSI Z21.22*CSA
should not be less than a combination
temperature/pressure relief valve certified by a
nationally recognized testing laboratory that
maintains periodic inspection of the
production of this equipment and meets the
requirements for Relief Valves and Automatic
Shutoff Devices for Hot Water Supply
Systems, ANSI Z21.22*CSA
4.4. The
temperature/pressure relief valve must be
marked with a minimum set pressure not to
exceed the marked maximum working
pressure of the booster heater.
marked with a minimum set pressure not to
exceed the marked maximum working
pressure of the booster heater.
CAUTION
Do not use an anti-siphon or check valve on
the incoming water line.
the incoming water line.
CAUTION
FOR INSTALLING PRESSURE AND
TEMPERATURE RELIEF VALVES IN
ACCORDANCE WITH ANSI Z21.22*CSA 4.4.
Combination pressure and temperature relief
valves with extension thermostats must be
installed so that the temperature-sensing
element is immersed in the water within the
top 6" (152 mm) of the tank. They must be
installed either in the hot outlet service line or
directly in a tank tapping. Combination
pressure and temperature relief valves that do
not have extension elements must be mounted
directly in a tank tapping located within the top
6" (152 mm) of the tank, and shall be
adequately insulated and located so as to
assure isolation from flue gas heat or other
ambient conditions that are not indicative of
stored water temperature. TO AVOID WATER
DAMAGE OR SCALDING DUE TO VALVE
OPERATION, DRAIN PIPE MUST BE
CONNECTED TO VALVE OUTLET AND RUN TO
A SAFE PLACE OF DISPOSAL. Drain pipe
must be as short as possible and be the same
size as the valve discharge connection
throughout its entire length. Drain line must
pitch downward from the valve and terminate
at least 6" (152 mm) above the floor drain
where any discharge will be clearly visible.
The drain line shall terminate plain, not
threaded, with a material serviceable for
temperatures up to 250°F (121°C) or greater.
Excessive length, over 15' (4.57 m), or use of
more than two elbows can cause a restriction
and reduce the discharge capacity of the
valve. No shut-off valve shall be installed
between the relief valve and tank, or in the
drain line. Valve lever must be tripped
periodically to ensure that waterways are
clear. This device is designated for emergency
safety relief and shall not be used as an
operating control. The valves are set to relieve
at 150 pounds pressure or when water
temperature reaches 210°F (99°C). Read tag on
valve for additional information.
TEMPERATURE RELIEF VALVES IN
ACCORDANCE WITH ANSI Z21.22*CSA 4.4.
Combination pressure and temperature relief
valves with extension thermostats must be
installed so that the temperature-sensing
element is immersed in the water within the
top 6" (152 mm) of the tank. They must be
installed either in the hot outlet service line or
directly in a tank tapping. Combination
pressure and temperature relief valves that do
not have extension elements must be mounted
directly in a tank tapping located within the top
6" (152 mm) of the tank, and shall be
adequately insulated and located so as to
assure isolation from flue gas heat or other
ambient conditions that are not indicative of
stored water temperature. TO AVOID WATER
DAMAGE OR SCALDING DUE TO VALVE
OPERATION, DRAIN PIPE MUST BE
CONNECTED TO VALVE OUTLET AND RUN TO
A SAFE PLACE OF DISPOSAL. Drain pipe
must be as short as possible and be the same
size as the valve discharge connection
throughout its entire length. Drain line must
pitch downward from the valve and terminate
at least 6" (152 mm) above the floor drain
where any discharge will be clearly visible.
The drain line shall terminate plain, not
threaded, with a material serviceable for
temperatures up to 250°F (121°C) or greater.
Excessive length, over 15' (4.57 m), or use of
more than two elbows can cause a restriction
and reduce the discharge capacity of the
valve. No shut-off valve shall be installed
between the relief valve and tank, or in the
drain line. Valve lever must be tripped
periodically to ensure that waterways are
clear. This device is designated for emergency
safety relief and shall not be used as an
operating control. The valves are set to relieve
at 150 pounds pressure or when water
temperature reaches 210°F (99°C). Read tag on
valve for additional information.