9.3 Flushing the Storage Tank
The solar storage tank also should be flushed annually
to minimize sediment buildup on the bottom of the
tank. If you live in an area with high mineral content in
your water, flush the tank on a semi-annual basis. Dis-
connect the power to the solar tank at the circuit
breaker or time switch (if present) before flushing. Set
the SunEarth control to the ‘OFF’ position. In a two
tank system it is not necessary to disconnect the power
to the electric water heater in order to flush the solar
tank.
Open the flush valve on the bottom of the storage tank
and drain a sufficient volume of water 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. Set the
SunEarth control to the
‘AUTO’
position.
9.4 Cleaning the Collector Glass
If you live in a dusty climate it is beneficial to wash off
the dirt that settles on the collector glass once a
month. Clean glass allows the collector to maintain a
high level of thermal performance.
9.5 Maintaining Pipe Insulation
Check the exterior pipe insulation annually and patch
or repair any exposed surfaces or degraded areas. Re-
pair as necessary with manufacturer’s recommended
jacket or coating or a high quality exterior latex paint.
9.6 Glass Replacement
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 installa-
tion contractor to change the glass.
9.7 Leaks
If you detect a water leak in the solar loop piping or
tank plumbing, contact your installation contractor to
service and refill the system.
9.8 Pump Not Circulating
If it’s been a sunny day and you don’t have hot water,
first make sure that the controller is set in the auto-
matic 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 tempera-
ture sensors. Contact your installation contractor for
service.
9.9 Night Time Heat Loss
If you have a full tank of hot water before bed and the
solar storage tank is cold in the morning make sure
that the circulating pump is not running at night. If the
pump is running and the controller displays questiona-
ble temperatures at the collector or tank (i.e. 180ºF
tank and 45ºF collector), check both sensors using a
resistance meter to see if they are correctly calibrated.
If you find a defective sensor replace it immediately.
9.10 Auxiliary Electric Element not Operating
If the weather is poor and the auxiliary heating ele-
ment will not fire, the bright red reset button on the
thermostat may have to be depressed to be reset. Sin-
gle tank systems have one heating element and ther-
mostat. Double tank systems with conventional elec-
tric water heaters have two heating elements and ther-
mostats.
DANGER: NEVER REMOVE THE PROTECTIVE AC-
CESS 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 immediately when you reconnect the circuit break-
er. 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. After the circuit breaker has been turned off,
remove the access plate in the storage tank and de-
press the red reset button on the thermostat. If it
clicks when depressed the heating element should fire
immediately when you reconnect the circuit breaker. If
the reset button does not click and you do not have hot
water after one hour, the heating element or thermo-
stat may be defective. Contact you installation contrac-
tor for service.
10) SYSTEM COMPONENTS PARTS
See Figures 11, 12 and 13 for the location of the spe-
cific component numbered below.
1. SunEarth Solar Collector(s):
Absorbs the sun’s
heat energy and transfers this heat to the heat ex-
change fluid (water) circulating through the collector.
2. Collector Sensor (T1):
Wired to the control.
Works in conjunction with the tank sensor to automati-
cally turn your circulating pump on and off at preset
temperature differentials.
3. Tank Sensor (T2):
Wired to your controller. Works
in conjunction with the collector sensor to turn your
circulating pump on and off at preset temperature dif-
ferentials.
4. Tank Outlet Sensor (T3) - Optional:
Wired to
your controller, this sensor shows the temperature of
the hot water leaving the solar storage tank. This sen-
sor is for information purposes only, it does not affect
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