9
This valve must be marked with the maximum set
pressure not to exceed the marked maximum working
pressure of the solar storage tank water heater. Install
the valve into an opening provided and marked for this
purpose in the solar storage tank water heater, and
orient it or provide tubing so that any discharge from the
valve exits only within 6 inches above, or at any distance
below, the structural
fl
oor, and does not contact any
live electrical part. The discharge opening must not be
blocked or reduced in size under any circumstance.
Important:
Only a new temperature and pressure relief
valve should be used with your solar storage tank water
heater. Do not use an old or existing valve as it may be
damaged or not adequate for the working pressure of
the new solar storage tank water heater. Do not place
any valve between the relief valve and the tank.
The Temperature & Pressure Relief Valve:
• Must not be in contact with any electrical part.
• Must be connected to an adequate discharge line.
• Must not be rated higher than the working pressure
shown on the data plate of the solar storage tank
water heater.
The Discharge Line:
• Must not be smaller than the pipe size of the relief
valve or have any reducing coupling installed in
the discharge line.
• Must not be capped, blocked, plugged or contain
any valve between the relief valve and the end of the
discharge line.
• Must terminate a maximum of six inches above
a
fl
oor drain or external to the building. In cold
climates, it is recommended that the discharge
pipe be terminated at an adequate drain inside the
building.
• Must be capable of withstanding 250°F (121°C)
without distortion.
• Must be installed to allow complete drainage of both
the valve and discharge line.
Installation Check List
Solar storage tank water heater
Location
• Centrally located with the water piping system.
• Located indoors and in a vertical position. Protected
from freezing temperatures.
• Provisions made to protect the area from water
damage. Suitable drain pan installed and piped to an
adequate drain.
• Suf
fi
cient room to service the solar storage tank water
heater.
Water System Piping
• Temperature and pressure relief valve properly
installed with a discharge line run to an open drain and
protected from freezing.
• All piping properly installed and free of leaks.
• Heater
completely
fi
lled with water. (See Figure 2)
• Closed system pressure buildup precautions installed.
• Mixing valve installed per manufacturer’s instructions.
Electrical Connections
• Wiring and connections comply with all applicable
codes.
• Solar storage tank water heater and electrical supply
are properly grounded.
• Proper overload fuse or circuit breaker protection
installed.
