Specifications

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6720649497 SM HP270-1 2012/09 en
Cables
Check position*, connection, continuity
* Ensure distance to copper pipes
Safety valve
Manual activation
Expansion vessel
Pre-charge verification (vessel without
water pressure)
Pipe work
Leakages, lack or defective insulation
Heating element
Cleaning of calc deposition, inspection of
integrity
Table 6 – Resume of main maintenance actions
The main connections are through thread connection with washer, however and for the connections of the flexible
hose with o’ring connection, the lubricant L 641 (part nr 8 709 918 413 - Water lubricant for water valve
connections) must be used.
(a) (b)
Pict.47 – (a) O’ring lubricant in water connections (b) white conductivity thermal paste