Parts - Rheem RS120-64BP Use & Care Manual

see that they calibrate to 10K ohm resistance at 77°F.
If you find a defective sensor replace it immediately.
Note that in a two tank system nighttime heat loss will
be harder to detect, especially if you are operating in
the solar preheat mode. Check the line thermometers
(No. 3) in the collector loop piping to detect night
thermosiphoning.
9.10 If the weather is poor and the auxiliary heating
element will not fire, the bright red reset button on
the thermostat may have to be depressed to be reset.
Single tank systems have one heating element and
thermostat. Double tank systems with conventional
electric water heaters have two heating elements and
thermostats (see fig 17, No. 29).
Never remove the protective access plate on the
exterior of the solar storage tank or conventional
water heater without disconnecting the 230 volt power
supply at the circuit breaker.
After the circuit breaker has been turned off, remove
the access plate on the storage tank or water heater
and depress the red reset button on the thermostat. If it
clicks when depressed the heating element should fire
30
VALVE POSITION DIAGRAM
2-TANK SYSTEM
30) directly above the heater to
position.
immediately when you reconnect the circuit breaker.
It the reset button does not click and you do not
have hot water after one hour, the heating element or
thermostat may be defective. Contact your installation
contractor for service.
In two tank systems the conventional electric water
heater will be wired for electrical back-up. The solar
tank will serve solely as a storage tank and will not be
wired.
10) Rheem SYSTEM COMPONENT PARTS
See Figures 16 and 17 for the location of the specific
components numbered below.
1) Rheem Solar Collector(s): Absorbs the sun's heat
energy and transfers this heat to the HTF circulating
through the collector. (Provided)
2) Collector Sensor: Wired to the system controller.
Works in conjunction with the tank sensor to
automatically turn your circulating pump on and off at
preset temperature differentials. (Provided)
fig.19d
8)
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