Technical information

25
FIG.
2.33
FITTING THE EXTERNAL SENSOR
The external sensor is supplied with the interface PCB
(Fig. 2.33).
The external sensor should be sited no more than 50 m from the
boiler and on an external north facing wall, between 2 and 2.5
metres above the ground. It should also be ensured that the
e
xternal sensor is positioned out of direct sunlight.
T
o connect the external sensor, plug the interface PCB into
connector
CN6 on the main PCB (see Fig. 2.33).
To connect between the interface PCB and the external sensor,
i
t will be necessary to use 2x 0.5mm
2
c
able, connected to the
two terminals on the external sensor and to Terminal B (Fig.
2.33) on the interface PCB.
Instructions on the activation and setting of the outdoor sensor
a
re detailed on pages 41 and 42.
Parameter P activates the external sensor, Parameter P6
modifies the thermal curve and Parameter P6 selects the
specific thermal curve for the type of system installed.
NOTE:WHEN USING THE ACO BOILERS TO HEAT AN INDIRECT
CYLINDER, DO NOT USE THE EXTERNAL SENSOR AS THIS WILL
AFFECT THE RECOVERY TIME OF THE CYLINDER.