User`s manual

INSTALLERUSERTECHNICIAN
2323
Zeus Maior electronic card
Valve VK 4105 for Zeus Maior
Key:
1 - Coil
2 - Coil pin
3 - Minimum power adjustment screw
4 - Maximum power adjustment screw
5 - Protection hood fixing screw
6 - Gas valve outlet pressure socket
DOMESTIC
HEATING
7 - Gas valve inlet pressure socket
8 - Air pressure socket hose connector
9 - Protection hood
10 - 2A fuse
11 - Slow ignition adjustment trimmer
12 - Heating adjustment trimmer
13 - Jumper for operation with natural gas/LPG
N.B.: never fall below the minimum heating power
when setting the slow ignition values.
3.8 Pump antiblock function.
The boiler is equipped with a function that starts the
pump at least once every 24 hours for the duration
of 30 seconds in order to reduce the risk of the pump
becoming blocked due to prolonged inactivity.
3.9 Boiler antifreeze function.
The boiler is equipped with an antifreeze function,
therefore if the system return water is below 4°C, the
boiler starts up and functions until reaching 43°C.