- 24
-
INST
ALLA
TION
Remote alaRm
The outputs of terminals 27-28 offer a clean contact for the management of one alarm signal. This contact is activated every time
a thermal unit fault/malfunction occurs.
b
WaRninGs
•
In case of a thermal unit fault/malfunction the “Warning light - shutdown due to activation of safety devices” sbs, located on
the control panel, does not come on. This warning light comes on only when an isPEsL safety device is activated. in this case,
the power supply to the thermal unit is cut off.
ExTERNAL PROBE CONNECTION (OPTIONAL)
install the external probe outside the building, on a plain surface,
facing north or north-west (coldest side) and away from chimneys,
doors, windows and areas exposed to direct sunlight.
For installation:
- Remove the cover.
- Fix the probe to the wall using 2 blocks.
- Carry out the electrical connections.
NOTE:
- Cable minimum section: 1 mm
2
.
- Maximum connection length: 50 m.
- Non-polarised connection terminals.
- Use coaxial shielded cables with double wire and connect the
braiding to ground/earth
b
WaRninGs
It is compulsory:
•
to use a line isolator omnipolar magnetic breaker, compliant with the EN Standards.
•
To connect L (Phase) - N (Neutral).
•
NOT to use cables having a cross-section smaller than 1 mm
2
.
•
To ensure that the grounding conductor is at least 2 cm longer than the L (Phase) - N (Neutral) cables.
•
For any electrical work please refer to the wiring diagrams in this manual.
•
carry out the connections with an effective grounding system (*).
•
DO NOT
use the water piping for grounding the device.
•
Pay attention to the maximum absorption of the external circulation pumps (see “WiRiNG DiAGRAM” on page 15).
(*) the manufacturer will not be held responsible for any damages resulting from failure to carry out the grounding of the
device and failure to abide by the prescriptions given in the wiring diagrams.