Hatco IMPERIAL "S" User Manual
Form No. EBOOSTERM-0406
19
INSTALLATION
WARNING
To assure proper operation and avoid a possible
unsafe condition, the booster heater must be
installed in a horizontal position with the base
parallel to the floor and the inlet connection at
the lowest point.
unsafe condition, the booster heater must be
installed in a horizontal position with the base
parallel to the floor and the inlet connection at
the lowest point.
WARNING
This product contains fiberglass, a product
known to the state of California to cause cancer,
birth defects or other reproductive harm.
known to the state of California to cause cancer,
birth defects or other reproductive harm.
PRESSURE AND TEMPERATURE
RELIEF VALVES
RELIEF VALVES
For protection against excessive pressures and
temperatures in the booster heater, install
temperature and pressure protective equipment
required by local codes. Hatco supplies temperature
and pressure relief valves constructed with brass
working parts and heat resistant silicone seat discs
for all booster heater models.
temperatures in the booster heater, install
temperature and pressure protective equipment
required by local codes. Hatco supplies temperature
and pressure relief 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.
temperature commercial operation. Do not
substitute Hatco valves with valves designed for
domestic water heaters.
WARNING
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-
1979. The temperature/pressure relief valve
must be marked with a minimum set pressure
not to exceed the marked hydrostatic test
pressure of the booster heater as noted on the
unit specifications.
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-
1979. The temperature/pressure relief valve
must be marked with a minimum set pressure
not to exceed the marked hydrostatic test
pressure of the booster heater as noted on the
unit specifications.
WARNING
FOR INSTALLING PRESSURE AND
TEMPERATURE RELIEF VALVES IN
ACCORDANCE WITH AMERICAN NATIONAL
STD. Z21.22-1979. 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 the 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. Discharge line
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 must
terminate between 1-1/2" (38 mm) and 6"
(152 mm) above the floor drain where any
discharge will be clearly visible. The drain line
shall terminate plain, not threaded, with material
serviceable for temperatures up to 250°F (121°C)
or greater. Excessive length, over 30' (9144 mm),
or use of more than four 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
assure 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 psi (1034 kPa) or when
water temperature reaches 210°F (99°C). Read
tag on valve for additional information.
TEMPERATURE RELIEF VALVES IN
ACCORDANCE WITH AMERICAN NATIONAL
STD. Z21.22-1979. 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 the 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. Discharge line
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 must
terminate between 1-1/2" (38 mm) and 6"
(152 mm) above the floor drain where any
discharge will be clearly visible. The drain line
shall terminate plain, not threaded, with material
serviceable for temperatures up to 250°F (121°C)
or greater. Excessive length, over 30' (9144 mm),
or use of more than four 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
assure 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 psi (1034 kPa) or when
water temperature reaches 210°F (99°C). Read
tag on valve for additional information.