15
2.10. ACCESSORY CONNECTION
IMPORTANT!!
Before carrying out any repairs to the appliance always
ensure that the e
xternal power supply has been isolated.
The boiler will remain live even when the ON/OFF knob is
in the
“O”(off) position.
In order to gain access to the e
xternal control connections, it is
first necessary to remove the casing (as shown in Section 3.2)
then proceed as follows:
1. Remove the cover of the main PCB box
(FIG 2.9).
2. Access can now be gained to the following connector (see
Section 2.11):
CN10 - Saf
ety thermostat for underfoor heating
CN 9 - Room Thermostat
CN
11 - Time clock
CN 6 - Interface PCB
CONNECTION OF ROOM THERMOSTAT OR EXTERNAL
TIME CLOCK
a.
- Insert the thermostat cable through the cable grommet and
fasten it by means of the cable-clamp provided.
b. - Connect the thermostat wires to the terminal block
CN9
(Fig. 2.12 - Diagram A).
c.- If a remote time clock is to be fitted, disconnect the
integral time clock from the P.C.B. CN11
d. - Using a volt-free switching time clock, connect the
switching wires from the time clock following points 1-4
above
(Fig. 2.12 - Diagram B).
e. - If using an external time clock and room thermostat,
these must be connected in series as points 1-7 above
(Fig. 2.12 - Diagram C).
CONNECTION OF INTERFACE PCB (optional)
The Interface PCB allows for the connection of:
REMOTE CONTROL - Clima Manager
External sensor
Secondaty outlet (*)
(*) = The secondary outlet can be used for the connection of the
following accessories:
- Zone valve
- LPG valve
- Secondar
y Pump
When connecting one of the abo
v
e accessor
ies it is
necessar
y to modify the
E
E
par
ameter on the P
arameter
Menu (see Section 3.6.1)
IMPORTANT!!
Only remove the links from SP and TA if they are to be
connected to external controls.
FIG. 2.9
TA
SP
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