47
INSTALLATION AND START-UP
Remove the control unit base-block by levering the two lower hooks (fig. 1).
fig. 1
fig. 2
Fix the control unit to the wall via the holes in the base-block. This should be mounted 1.5 m above the floor in
an area well away from entry/exit doors, windows or other factors that might influence room temperature
readings (fig. 2).
After making sure that electrical power at the boiler is OFF proceed with the electrical connections using bi-
polar wiring: do not route the wiring parallel to the main power supply wires/leads.
If it is not possible to avoid taking the same wiring route use a shielded lead, the braid of which must be
connected to an earth.
Connect the lead extremities to the "+IN+" terminal block (fig. 3). It is highly important that you observe the
indicated polarities (boiler + to control +, boiler – to control -)
Lead length must not exceed 50 m.
CONTROL
OUTDOOR
BOILER
UNIT SWITCH
SENSOR
+ BOILER
- BOILER
fig. 3