Owner’s Manual – Solar Water Heaters
20
H3165 029664 Rev. B
Filling the Storage Tank:
The water heater storage tank must be filled
with water before turning on the electrical
supply.
1. Ensure all hot water taps are closed.
2. Using a flat-bladed screwdriver, ensure
both ball valves on the solar collector
connections are closed.
3. Open the isolating valve at the cold water
inlet slowly and allow the water heater to
fill.
4. Slowly open the Pressure & Temperature
Relief (PTR) Valve by lifting the easing
lever on the valve.
5. Hold the PTR Valve open until water is
relieved to waste through the drain line.
6. Lower the PTR Valve easing lever gently
and check it closes correctly.
7. Open all hot water taps.
8. Close each hot water tap after the
air is expelled from its line.
Turning off the Water Heater:
1. Turn off the electricity supply to the solar
controller.
2. For electric boosted models, turn
off the electricity supply to the electric
booster.
3. For gas boosted models, close the gas
supply valve and turn off the electricity
supply to the gas booster.
4. Close the isolating valve at the cold water
inlet.
Draining the Storage Tank:
1. Turn off the water heater as described at
left.
2. Gently operate the easing lever on the
Pressure & Temperature Relief (PTR)
Valve to release the pressure
in the water heater.
3. Disconnect the plug from the Tee under
the solar module cover and attach a drain
hose to the water heater.
4. Gently operate the easing lever on the
PTR Valve to let air into the water heater.
5. Wait for the water to drain out through
the hose.
6. Lower the PTR Valve easing lever gently.
7. Remove the drain hose and replace the
plug.
Flushing the Storage Tank:
1. Carry out “Draining the Storage Tank”
steps 1 to 6 above.
2. Open the isolating valve at the cold water
inlet.
3. Wait for the water to run clear from the
drain hose.
4. Close the isolating valve at the cold water
inlet.
5. Remove the drain hose and replace the
plug.
Fill, Flush and Drain
– Storage Tank
