Rheem RS120-64BP Use & Care Manual page 19

The installation of all horizontal and vertical pip-
ing may not reduce the performance or rating of
fig.13
COLLECTOR
supplies to deliver hot water to your fixtures at a safe,
controlled temperature.
WARNING: SCALDING CAN OCCUR
!
WITHIN FIVE SECONDS WHEN WATER
TEMPERATURES APPROACH 140ºF. THE
MIXING VALVE SHOULD BE ADJUSTED BY
YOUR CONTRACTOR TO PROVIDE WATER
TO YOUR FIXTURES AT NO MORE THAN
120ºF.
The 3/4" cold water supply line to the solar storage
tank must be insulated with minimum 7/8" X 1/2"
pipe insulation to a minimum distance of 5' behind the
storage tank, or to the wall if closer than 5'.
4.9 Tank Sensor Placement
Figure 18 details the proper placement of the solar
storage tank sensor. Make sure the sensor is secured
to the threaded stud on the storage tank with a 10-24
stainless steel nut.
SENSOR
Thoroughly weatherize the wire connections in
accordance with the roof sensor detail above. Replace
the fiberglass insulation batting and close the access
cover.
A properly licensed contractor must make the 230
volt electrical connection to the water heater or solar
storage tank and the electronic time switch (Optional
No. 33). If your solar contractor is not allowed by
law to make these connections consult a licensed
electrician.
Never activate the circuit breaker controlling the
electrical heating element until the solar storage tank
is completely filled with water. This will prevent "dry
firing" of the heating element. The electrical heating
element will be destroyed almost instantaneously if
not completely submerged in water when activated.
Make sure the water heater circuit breaker is off until
the solar storage tank is completely filled.
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