Checking Operating Pressure, With Possible Re-Adjustment; Cleaning The Collectors - Buderus Logamatic SC40 Operating Instructions Manual

Notes for the user
5
5.4

Checking operating pressure, with possible re-adjustment

Pressure fluctuations in the solar pumping circuit due to temperature changes are nor-
mal and do not lead to faults in the solar thermal system.
V Check the system pressure on the pressure gauge (
(about 20 °C).
If pressure drops
A pressure drop can be caused by the following:
– There is a leak in the solar thermal circuit.
– An automatic air vent has expelled air or vapour.
If the pressure of the solar thermal system has dropped:
V Check whether heat transfer fluid has collected in the holding tank under the solar pumping sta-
tion.
V Call in a qualified heating engineer if the system pressure drops 0.5 bar below the level recorded
in the commissioning log (
5.5

Cleaning the collectors

Danger: Risk of death by falling from roof
V Inspection, maintenance and cleaning work on the roof must only be carried out by
qualified technicians.
Due to the self-cleaning effect when rain falls, the collectors do not usually need cleaning.
14
Installation and servicing instructions for the solar pumping station).
Logamatic SC40 - Specifications subject to change without notice.
Fig. 3) when the system is cold