Owner’s Manual – Solar Water Heaters
21
H3165 029664 Rev. B
Filling the Solar Collectors:
1. Fill the storage tank as described on
page 20.
2. Using a flat-bladed screwdriver, open the
solar collector drain pipe ball valve.
3. Wait until water is relieved to waste
through the solar collector drain pipe.
CAUTION:
This water may be hot.
4. Using a flat-bladed screwdriver, close the
solar collector drain pipe ball valve.
5. Using a flat-bladed screwdriver, open the
solar return socket ball valve.
Draining the Solar Collectors:
1. Open a hot water tap and allow
the water to run for at least five
minutes. (This will assist to reduce
the temperature of the water in the solar
collectors).
2. Turn off the water heater as
described on page 20.
3. Gently operate the easing lever on
the Pressure & Temperature Relief (PTR)
Valve to release the pressure
in the water heater.
4. Using a flat-bladed screwdriver,
close the solar return socket ball
valve and open the solar collector drain
pipe ball valve.
5. Loosen the DN15 compression
fitting on the outlet of the pump.
6. Wait for the water to drain out of the solar
collectors through the drain
pipe and out of the solar flow pipe.
7. Retighten the DN15 compression fitting
on the outlet of the pump.
8. Using a flat-bladed screwdriver,
close the solar collector drain pipe ball
valve and open the solar return socket
ball valve.
Flushing the Solar Collectors:
It is recommended that flushing is carried out
early in the morning before the sun starts to
heat the collectors. Flushing the collectors
later in the day can result in the discharge
of very hot water or steam from the solar
collector drain pipe.
1. Open a hot water tap and allow the water
to run for at least five minutes.
2. Using a flat-bladed screwdriver, close the
solar return socket ball valve.
3. Using a flat-bladed screwdriver, open the
solar collector drain pipe ball valve.
4. Wait for the water to run clear from the
solar collector drain pipe.
5. Using a flat-bladed screwdriver, close the
solar collector drain pipe ball valve and
open the solar return socket ball valve.
Fill, Flush and Drain
– Solar Collectors
