DE DIETRICH 220 SHL - Manual (Page 17)

5 Checking and maintenance
5.1 General instructions
CAUTION
4
Maintenance operations must be done by a qualified
engineer.
4
Only original spare parts must be used.
5.2 Impressed current anode
No maintenance operations are required on an impressed current
anode.
CAUTION
The boiler control panel must be switched on to ensure
that the impressed current anode operates.
Failure to abide by this maintenance rule may damage the
domestic hot water calorifier and void its warranty.
5.3 Safety valve or safety unit (DHW circuit)
The valve or safety assembly must be operated at least once a
month
in order to ensure that it is operating correctly and to prevent
possible overpressure which would damage the DHW tank.
WARNING
Failure to comply with this maintenance rule may cause
deterioration of the DHW tank and the cancellation of the
guarantee.
WARNING
Only operate the valve (red head) on the DHW circuit. Do
not operate the valve (yellow head) on the solar circuit.
5.4 Inspection and maintenance of the solar circuit
We recommend that you take out a maintenance contract
providing for an annual or biannual check of the fluid level,
the antifreeze protection, the pressure of the installation
and the expansion vessel, its tightness and its general
running.
220 SHL 5. Checking and maintenance
18/10/2012 - 300028214-001-02 16