31
Instructions for the installer
JUMPER LOCATION
The jumpers, fitted on to the modulation board, have the
purpose of determining several indispensable functions for
correct boiler operation.
JP2: GAS TYPE
For boilers operating with LPG, the jumper has to be linked
between the connectors 1 and 2.
For boilers operating with natural gas the jumper has to be
linked between the connectors 2 and 3.
JP1: NIGHT REDUCTION
The “Night reduction” function is enabled if the jumper is linked
between terminals 1 and 2.
The “Night reduction” function is excluded if the jumper is
linked between terminals 2 and 3 (factory set configuration).
DANGER!
Disconnect and switch off and electrical
supply before carrying out any operations on
the electrical parts.
To gain access to the jumper:
- Remove the front panel
- Undo the 4 screws A and remove the cover B
If the jumper is positioned on NS (1-2), the high temperature
zone is in permanent demand.
As the high temperature demand has priority on the low
temperature demand, the eventual action of the digital remote
room controller is completely uninfluential.
The closure of the contact between 3-4 on the Y2 provokes
the night reduction mode as illustrated in the graph on page
27.
The opening of the contact between 3-4 on the Y2 restores
the selected setpoint temperature and/or renders it
independent from the outdoor compensation if an outdoor
sensor is fitted.
To disenable the central heating demand it is necessary to
turn the CH knob to the minimum setting.
The night reduction’s default value is 5 (corresponding to
10°C).
This value can be changed via the TSP 1 on the digital room
controller from 5 (10°C) to 30 (35°C).
OFF
1
2
3
JP1
Jp1
OFF
NIGHT SHIFT
JP2
GPL
MET
GPL
MET
1
2
3
JP2
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