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3
Operation
After all installation procedures have been completed, and
all water piping to the energy source and power connections
have been double checked, the unit is ready for operation.
The following Startup Procedure focuses on the storage tank.
Check the Installation and Operation Manual of the hot water
source for additional startup and shutdown procedures.
Startup procedure
1.
Assure that all manual shutoff valves are closed.
2.
Slowly open the manual shutoff valve on the cold water
supply line and the valves in the hot water source
recirculation piping. Check to assure that there are not
leaks at the valve or any joints. Allow the tank to fill with
water. As the tank is filling, hold the relief valve
open to allow air to bleed out of the tank. Hot water
faucets at the highest location in the building should also
be opened. This will speed the filling process. Make sure
the tank is full of water and free of air.
3.
Open the manual shutoff valves.
4.
Turn on the recirculation pump between the water heater
and the tank.
After the power to the pump is turned on verify that the
pump is working. If the pump is an oil lubricated unit,
verify proper oiling.
Heated water presents situations that
WARNING
can be very dangerous because of the
high temperatures and pressures. Use
common sense and follow all accepted
and recommended procedures when
performing installation, operation, and
maintenance procedures to avoid possible
injury or death.
5.
Follow the Startup procedure for the water heater to
initiate a call for heat. Adjust the operating temperature
control to the desired operating temperature and set the
safety high limit.
6.
As the unit is heating the water, carefully re-inspect water
recirculation piping and the tank hot water outlet for
signs of leakage.
7.
As the unit approaches the desired operating
temperature, adjust the temperature controls.
8.
After the unit has reached operating temperature,
re-inspect all joints for signs of leakage. In addition,
check all gauges and controls to verify that the water
temperature
and
specifications.
9.
The unit is now ready for normal operation.
8
pressure
are
within
®
Shutdown procedure
1.
Turn off all power to the circulating pump and the hot
water source controls.
2.
Close all valves in the system in the following order:
• the hot water outlet line;
• the recirculation water piping
3.
Relieve the pressure where possible.
4.
After the system has cooled, drain the unit by opening
the tank drain valve and holding the relief valve
in the open position. This will prevent the formation of
a vacuum and increase the drainage flow.
5.
Proceed with the required maintenance or repairs.
6.
After performing the required maintenance or repairs,
return the unit to operation by following the Startup
Procedure.
design
Installation and Operation Manual
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