23
6.
COMMISSIONING
SYSTEM
Flushing and commissioning should only be carried out when:-
1.
No sun is shining on the collectors e.g. early in the morning,
evening or when the collectors are covered.
2.
Temperatures are not near freezing or there no is risk of frost.
Before filling the system carry out the following pre-fill check.
1.
Check collectors have been fitted correctly.
2.
Check all roof tiles are replaced and secure.
3.
Check weatherproofing of roof access pipework.
4.
Check all pipework connections are correct and fully tightened.
5.
Check all pipework is fully supported.
6.
Check all manual air vents are closed.
7.
Check automatic air vents are open.
8.
Check isolation valve to automatic air vent is open.
9.
Check expansion vessel connection and that the pipework to it is
free from any valve or restriction.
10. Check pressure relief valve is correctly fitted.
11. Check PRV discharge is fitted correctly and that a suitable collecting
vessel is in place.
12. Check that the indirect cylinder has been filled.
13. Check that there are no valves or restrictions in the PRV discharge.
14. Check connections to the cylinder.
15. Check that an automatic air vent is fitted at the highest point in the
system, this will normally be adjacent to the collector flow.
16. Check that any high points/potential air traps in the pipework are
fitted with a suitable automatic air vent.
17. Check drain points are closed.
18. Open all isolating valves within the circuit.
19. Check the pre-pressure of the expansion vessel - see 5.12.
20. Check equipotential bonding is fitted where required.
21. The pump is correctly wired and earthed.
22. Check all wiring is to current IEE regulations and BS7671.
IMPORTANT
All fittings used must be suitable
for temperatures in excess of
150°C.
6.1 P
RE
-
FILL CHECK
