7.3
Standard inspection and maintenance operations
CAUTION
During inspection and maintenance operations, always
replace all gaskets on the parts removed.
Before carrying out any work, check whether the boiler has
been adapted to one of the following situations:
4
G20 (Gas H) or G31 (Propane)
4
high pressure systems
4
WTW coupling
4
CLV overpressure (combusted gas discharge
systems)
See the sticker on top of the boiler next to the identification
plate.
7.3.1.
Checking the hydraulic pressure
The hydraulic pressure must reach a minimum of 0,8 bar. If the water
pressure is lower than 0,8 bar, the symbol
e
will appear.
If necessary, top up the water level in the heating system
(recommended hydraulic pressure between 1,5 and 2 bar).
7.3.2.
Checking the ionization current
Check the ionization current at full load and low load. The value is
stable after 1 minute. If the value lies below 3 µA, replace the ignition
electrode.
¼
See chapter: "Reading the various current values", page 61.
7.3.3.
Checking the transfer capacity
If the transfer capacity is noticably low (temperature too low and/or
flow rate less than 6,2 l/min), clean the plate exchanger (domestic hot
water side) and the water filter cartridge.
¼
See chapter: "Cleaning the plate exchanger (domestic hot
water end) and the water filter cartridge", page 79
Calenta 25s - 28c - 35s - 40c
7. Checking and maintenance
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