Rheem Solar Hiline 52D180 Owner's Manual And Installation Instructions page 51

After the solar storage tank has been drained or flushed:

Disconnect the hose from the cold water inlet and reconnect the cold water pipe work.

Open the cold water isolation valve to the water heater fully, check fittings for leaks and switch on the
power.
FLUSHING THE SOLAR COLLECTORS

From the bottom and top ends of the solar collectors, unscrew and remove the end plugs.
Connect a hose to each of these two collector connections. Let the other end of the hoses go to a drain.

Open the cold water isolation valve to the water heater.

Allow water to flow from the solar collectors until it is clear of any sediment.

When satisfied the solar collectors are flushed, close the cold water isolation valve to the water heater,
remove the hoses and reconnect all fittings to their original location.

Open the cold water isolation valve to the water heater fully, check fittings for leaks and switch on the
power.
DRAINING THE SOLAR COLLECTORS

From the bottom end of the solar collectors, unscrew and remove the end plug.
Connect a hose to the collector connection. Let the other end of the hose go to a drain.

From the top end of the solar collectors, unscrew and remove the end plug.
This will let air into the collector and allow the water to drain through the hose.

When satisfied the solar collectors are drained, remove the hose and reconnect all fittings to their original
location.

Open the cold water isolation valve to the water heater fully, check fittings for leaks and switch on the
power.
It is recommended to flush the solar storage tank and solar collectors every five years. This will assist in
keeping the solar collectors, solar cold pipe and solar hot pipe clear of sediment.
DRAINING AND FLUSHING THE WATER HEATER
51