17
5
COMMISSIONING
Alpha SolarSmart 150 - Commissioning
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. 19) 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 requires pre-filling (the drain back unit and collectors are to be filled with standard domestic water)
as follows:
1.
Isolate the electrical supply to the SolarSmart System.
2.
Remove the front cover from the drain back unit (four screws).
3.
Remove the 22 mm return connection on the top of the drain back unit.
4.
Close the ball valve on the manifold to prevent water from draining out of the cylinder (Fig. 20).
5.
Remove the relief valve assembly by undoing the socket head capscrew using a 6mm Allen key (Fig. 20).
6.
Carefully fill the drain back unit with 9 litres of water (use a flexible tube or funnel) until water overflows from the bottom
hole of the manifold (see Fig. 20). This indicates the correct fill level has been reached.
Note: Do not overfill.
7.
Replace the relief valve assembly and 'O' ring.
8.
Switch on the electrical supply and 'start up' the Solar system as described in Section 5.3.
9.
Check for any leaks and replace the front cover.
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.
The ball valve fitted to the manifold is used for draining the drain back unit if required.
To drain the drain back unit remove the relief valve assembly and open the ball valve (Fig. 20).
Fig. 20
Fig. 19
Pump vent
screw
Socket head
capscrew
Relief valve assembly
Closed
Open
Pump vent
screw
Add water to 22 mm
return connection
Socket head capscrew
securing relief valve
Cover fixing screw
(one each corner)
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