Rheem GAS BOOSTED SOLAR WATER HEATER - Manual (Page 44)

COMMISSIONING
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17. Add water to top up the level of the closed circuit fluid in the heat exchanger if required.
To add water to the closed circuit fluid:
ƒ If not already removed, disconnect the drain line and remove the spring clip from the solar
circuit relief valve at the top of the solar storage tank and remove the valve
(refer to step 5 ) .
Warning: The solar circuit may be under pressure. Take care when removing the solar
circuit relief valve, as a sudden discharge of pressurised hot air may be experienced. This
discharge will create a sharp sound of air being released.
ƒ Place a funnel in the relief valve fitting.
ƒ Add water slowly through the funnel until the level of fluid in the hose is at the desired level as
marked on the solar storage tank.
Note: It may be necessary to undo the compression nut on the solar hot pipe at the top of the
solar storage tank and loosen the pipe work from the fitting to assist the flow of water into the
closed circuit through the funnel.
ƒ Remove the funnel from the relief valve fitting.
ƒ Position the solar hot pipe correctly in its fitting and tighten the compression nut if this has been
loosened.
18. Drain closed circuit fluid from the heat exchanger if required.
To drain closed circuit fluid:
ƒ If not already removed, disconnect the drain line and remove the spring clip from the solar
circuit relief valve at the top of the solar storage tank and remove the valve
(refer to step 5 ) .
Warning: The solar circuit may be under pressure. Take care when removing the solar
circuit relief valve, as a sudden discharge of pressurised hot air may be experienced. This
discharge will create a sharp sound of air being released.
ƒ Place the end of the solar fluid hose into a graduated volumetric container and drain closed
circuit fluid until the level of fluid in the hose is at the desired level as marked on the solar
storage tank.
It may be necessary to drain off the closed circuit fluid in small amounts, raising the hose back
to the top of the solar storage tank and noting the level of the closed circuit fluid in the clear
hose each time, so as not to drain below the desired level.
Note: The closed circuit fluid contains food grade additives (rust inhibitor, anti-freeze agent,
colour) and is harmless to the environment. However, it is good practice to recover any excess
fluid and remove from site.
ƒ Re-affix the hose to the same location on the side of the solar storage tank.
19. If water has been added to or closed circuit fluid has been drained from the heat exchanger,
recommence this procedure from step 9.