Solex Roofing Installation Manual 42
Solex Energy Ltd +44(0)1305 837223 www.solexenergy.co.uk
System maintenance – annual
•
Water level
– check that this is at the working level, and adjust the float valve if
necessary. In normal operation the level should only be higher than the working level if
all the stores are up to their maximum temperatures, and the roof temperature exceeds
95
o
C. If it rises under other conditions suspect a leak.
•
System function
– check that the system is functioning and circulating. This is best
done by feeling the pipe temperatures, taking account of the prevailing conditions. If
necessary use the manual mode of the controller to force on pumps/valves etc and feel
the pipe temperatures to check circulation.
•
Pump
– if the pump is hot, but the pipes some distance from it are not, then either the
pump may have failed, or there may be a system airlock. First, remove the screw from
the end of the pump and check/restart rotation. If this is operating, the fault is probably
an airlock.
•
Motorised valves
– check these operate by using the controller manual mode to force
them on/off.
•
Integrity of roof
– any problem with a leak in the roof or supply/return pipes is usually
evidenced by frequent air in the system exiting into the expansion tank. To check, turn
the pump off and observe the tank level. Any sustained rise indicates a leak. The tank
level should not rise, even after 12 hours or more (with the exception of overheat
conditions when the roof temperature exceeds about 90
o
C.)
•
Controller and sensors
– any fault state is shown by a flashing LED, and a spanner
symbol on the display. See the controller section for more details.
