7
reducing valve must be adjusted to the lowest working
pressure of the solar control components.
6. If installing the solar storage tank water heater in a
closed water system, install an expansion tank as
specified under “Closed System / Thermal Expansion.”
7. Install a shut off valve in the cold water inlet line. It
should be located close to the solar storage tank water
heater and be easily accessible. Know the location of
this valve and how to shut off the water to the heater.
8. Install a temperature and pressure relief valve and
discharge line in the opening marked “T & P RELIEF
VALVE”. Install as specified under “Temperature and
Pressure Relief Valve.”
9. After piping has been properly connected to the solar
storage tank water heater, open the nearest hot water
faucet and allow the tank to completely fill with water.
To purge the lines of any excess air and sediment,
keep the hot water faucet open for 3 minutes after a
constant flow of water is obtained. Close the faucet and
check all connections for leaks.
MIXING VALVE PLUMBING
AUXILIARY WATER HEATER
SOLAR STORAGE TANK
ELECTRIC ASSISTED
SOLAR STORAGE TANK
FIGURE 10
HOT
COLD
HOT
COLD
HOT
COLD
RECIRCULATION
RETURN
SPRING CHECK VALVE
COLD WATER SUPPLY
MIXING VALVE
MIXED HOT
WATER OUTLET
SPRING CHECK VALVE
COLD
WATER
SUPPLY
MIXING VALVE
MIXED HOT
WATER
OUTLET
SOLAR IN
(FROM COLLECTOR)
SOLAR OUT
(TO COLLECTOR)
SOLAR STORAGE W/AUXILLARY BACK-UP CONFIGURATION
SOLAR STORAGE CONFIGURATION
General Information
Please note the following:
DO NOT
install this solar storage tank water heater with
iron piping. The system should be installed only with new
piping that is suitable for potable (drinkable) water such as
copper, CPVC, or polybutylene. DO NOT use PVC water
piping.
DO NOT
use any pumps, valves, or
fi
ttings that are not
compatible with potable water.
DO NOT
use valves that may cause excessive restriction
to water
fl
ow. Use full
fl
ow ball or gate valves only.
DO NOT
use 50/50 tin-lead solder (or any lead based
solder) in potable water lines. Use 95/5 tin-antimony or
other equivalent material.
DO NOT
tamper with the thermostat, heating elements,
electrical connections, or temperature and pressure relief
valve. Tampering voids all warranties. Only quali
fi
ed
technicians should service these components.
DO NOT
use with piping that has been treated with
chromate’s, boiler seal, or other chemicals.
DO NOT
add any chemicals to the system piping which will
contaminate the potable water supply.
