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10.2. Range of operating curves
When the external probe is connected, the temperature regulation device
(knob) of the heating circuit regulates the Kt coeffi cient.
The pictures here below show the correspondence between the knob
position and the set curves. It is possible to set also curves between the
ones shown in the picture.
IMPORTANT: the range of heating fl ow temperature TM depends on
the position of the jumper or switch T.RISC. ( see paragraph 13). The
maximum possible temperature setting is 85 or 45 °C.
REMOVE THE
JUMPER
Figure 10: Connection of the climatic regulator QAA73
interface card
25
11. Connection of the climatic
regulator QAA73
(accessory on demand)
Connection of the climatic regulator QAA73 to the boiler PCB must be
made through an interface card, supplied as accessory. This interface card
must be connected to A7 connector of the boiler PCB. QAA73 has to be
connected to terminals (+) and (-) of the terminal board supplied with the
regulator. It is not necessary to respect the polarity (see fi gure 10)
When you install the QAA73, you must remove the room thermostat
jumper present on the power supply terminal board (terminals 1
and 2).
See the instructions enclosed with the accessories for their correct
installation and use.
Instructions given with the QAA73 also include the following
information:
• Parameters settable by the user;
• Choice of the language;
• Use of Information key.
KEY:
N.C.
Normally closed contact
C
Common contact
N.A.
Normally open contact
+
QAA73 positive pole
-
QAA73 negative pole
S.EXT
External probe
QAA 73
regulator
External probe
COLOUR OF THE WIRES:
M
Brown
N
Black
C
Light blue
R
Red
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