Rheem 52S160 Service Instructions Manual page 27

Removing or Replacing a Solar Collector (Procedure 3)
Water under pressure and at temperatures up to 150ºC may be present in
the collector/s. Isolate water supply and relieve pressure through a hot tap
or the temperature and pressure relief valve prior to opening the collector
pipe work. Wear protective clothing to prevent scalding or burns.
NOTE: if replacing CBA/CBT/SCT/SBT collectors, go to page 30.
1. Drain the water heater. Refer to procedure 1, page 26.
2. Disconnect the hot or cold pipe at the collector and disconnect from the Sunstat valve
or water heater depending on which collector requires replacement. (Note: on a single
collector array it will be necessary to remove both pipes.) Remove the hot or cold pipe
or both to a safe location.
NOTE: It is strongly recommended that the hot or cold pipe or both be removed
from the collector. This will prevent damage to the tank in the event the pipes are
knocked, and remove the risk of tripping over the pipes during collector removal
and replacement.
3. Remove the inter-connectors at the top and bottom of the collector (if fitted).
4. Remove the screws retaining the collector to the angle bracket, disconnect the
retaining strap at the top of the collector, slide the collector out and remove to ground
level.
5. Reassemble in reverse order of above.
6. Once reassembly is complete, close the T&PR valve and restore the water supply and
open all the hot taps in the premises to allow air to be expelled from the pipe work. As
the water runs freely from each tap, close it.
7. Restore the power supply to the electric booster circuit.
Heating Unit (Procedure 4)
1. Drain the water heater. Refer to procedure 1, page 26.
2. Remove the access cover and disconnect the wiring between the terminal block,
thermostat and heating unit and unclip the thermostat.
3. Remove the two screws retaining the thermostat clamp.
4. Loosen the two lower screws slightly. When water is below the heating unit level, refit
the cold pipe to the collector and fit the spring clip into place.
5. Remove the two lower screws and withdraw the heating unit carefully making sure the
loop does not catch and open up inside the cylinder.
6. Clean around the cylinder fitting, fit gasket to replacement heating unit and insert into
water heater. Note: Curve of heating unit to be horizontal.
7. Replace screws and thermostat clamp, and then tighten.
8. Close T&PR valve, restore the cold water supply and purge air through hot taps.
9. Check heating unit for leaks.
10. Refit thermostat and reconnect the wiring as per the circuit diagram.
11. Refit the access cover.
12. Restore power supply to electric booster circuit.
TM005 Rheem Solar Hiline Service Instructions REV D
D.O.I 20/02/2009
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27
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