18
5 COMMISSIONING
Alpha SolarSmart 90 - Commissioning
Fig. 18
Fig. 19
5.1
FILL THE SOLAR CYLINDER
1.
Check that all the mains water connections are tight and any drain valves are closed.
2.
Open the mains water inlet valve. Thoroughly flush out the hot water system by turning on all the hot water taps and allow
the water to flow until no air is present, this will automatically vent the cylinder of air. Turn off each tap.
3.
It is important to vent the solar cylinder pump by unscrewing the centre cap from the pump head (see Fig. 18) until water
runs from it and then replace the cap.
4.
Isolate the mains inlet and drain the cylinder to remove any debris that may have collected in the cylinder. Refill and vent
the system as described above.
5.2
DRAIN BACK UNIT
The drain back unit is pre-filled and should not
need any water added.
It is important to prime the drain back unit
pump:- unscrew the centre cap and rotate the
spindle using a small screwdriver. Replace the
cap.
If the drain back unit requires to be filled, fill as
follows:
1.
Isolate the electrical supply to the
SolarSmart System.
2.
Remove the front cover from the drain back
unit (pulls off).
3.
Unscrew the plug located in the fill/overflow
point. See Fig. 19.
4.
Carefully fill the drain back unit with water
(use a flexible tube or funnel) until water
overflows from the fill/overflow point (see
Fig. 19). This indicates the correct fill level
has been reached.
Note:
Do not overfill.
5.
Replace the plug in the fill/overflow point.
6.
Switch on the electrical supply and 'start up'
the Solar system as described in Section
5.3.
7.
Check for any leaks and replace the front
cover.
Collector
Heat
exchanger
Cylinder
Fill/overflow
point
Correct filling level
for DBU
DBU pump
Drain point
