Rheem RS120-64BP Use & Care Manual page 29

6.6 100% Utility Power
consumed so that the tank lining is not. At a certain
point in the process, the anode rod is no longer
completely effective and the corrosive processes
begin to eat away at the tank's glass lining. In time the
Follow the instructions for the single tank system
solar storage tank, like any other gas or electric water
heater, will begin to leak. The process is not reversible
above. All three
and the tank must be replaced.
System temperatures and water quality affect the rate
ball valves above
at which the anode rod is consumed. In general, the
higher the average system temperature the faster the
the heaters (Nos.
rate of corrosion. By changing the anode rod after the
fifth year of system operation, and every three to five
24, 25 and 26)
years thereafter, it is possible to extend the life of the
solar storage tank. Periodic replacement of the anode
rod in your solar storage tank can significantly extend must have the
the tank life.
valve handles
9.3 The solar storage tank also should be flushed
annually to minimize sediment build-up on the bottom
placed in the hor-
of the tank. If you live in an area with high mineral
content in your water, flush the tank on a semi-annual
izontal position.
basis. Disconnect the power to the solar tank at the
circuit breaker or time switch (if present) before
See Figures 19c
flushing. Turn the controller to the off position.
100%
Open the flush valve on the bottom of the storage
tank (No. 15) and drain a sufficient volume of water
Power and 19d.
to eliminate the sediment. After the procedure is
complete make sure the tank is completely full of
water before restoring power to the thermostat and
heating element. Turn the controller to the "on"
7) ISOLATING
position.
THE MAJOR
9.4 If you live in a dusty climate it is a good idea to
wash off the dirt that settles on the collector glass
COMPONENTS
once a month. Clean glass allows the collector to
AND SYSTEM
Utility
100% UTILITY
maintain a high level of thermal performance.
9.5 Check the exterior pipe insulation annually and
patch or repair any exposed surfaces or degraded
areas. Repaint as necessary.
9.6 In the unusual instance of collector glass
breakage, the glass should be replaced immediately.
This will reduce the likelihood of water accumulating
inside the collector and deteriorating the insulation.
Contact your installation contractor.
9.7 If you detect a glycol or water leak, or the glycol
loop pressure drops unexpectedly, contact your
installation contractor immediately to diagnose the
problem and recharge the system.
9.8 If it's been a sunny day and you don't have hot
water, first make sure that the controller is set in the
automatic position. If the controller is properly set
and the pump has not been running, unplug the line
cord from the controller receptacle and plug the pump
directly into a nearby 115 volt outlet. If the pump does
not run it may need to be replaced. If the pump does
run when plugged directly into the wall outlet, the
problem may be located in the controller or one of the
10k ohm sensors. Contact your installation contractor
for service.
9.9 If you have a full tank of hot water before bed
and the solar storage tank is cold in the morning, the
check valve (No. 4) may not be seating correctly and
should be cleaned or replaced. Also make sure that
the circulating pump is not running after 6:00 p.m.
If the pump is running and the control indictor light
"Solar" #1 is on after 6:00 p.m., check both sensors to
fig.19c
POWER
VALVE POSITION DIA
2-TANK SYSTE
valv
ope
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The
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23)
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30)
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29