Ariston ACO 35 MFFI, Инструкции по установке и обслуживанию

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22
2.12. A
CCESSORY
C
ONNECTION
IMPORTANT!!
Before carrying out any repairs to the appliance always
ensure that the external power supply has been isolated.
The boiler will remain live even when the ON/OFF knob is
in the “O”(off) position.
IMPORTANT!!
Only remove the links from SP and TA if they are to be
connected to external controls.
TA
SP
F
IG
. 2.27
F
IG
. 2.26
In order to gain access to the external control connections, it is
first necessary to remove the casing (as shown in Section 3.2 -
page 39) then proceed as follows:
1. Remove the cover of the main PCB box (Fig 2.26) .
2. Access can now be gained to the following connectors (see
Section 2.13 - page 24):
CN10 - Safety thermostat for underfloor heating
(SP)
CN 9 - Room Thermostat (TA)
CN 11 - Time clock
CN 6 - Interface PCB (
F
IG
. 2.28)
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. 2.27 - Diagram A).
c.- If a remote time clock is to be fitted, supply 240V from
the same spur as the boiler for the clock motor supply,
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 A-
C above
(Fig. 2.27 - Diagram B).
e. - If using an external time clock and room thermostat,
these must be connected in series as points A-D
above
(Fig. 2.27 - Diagram C).
N
OTE
: E
NSURE LOW VOLTAGE AND HIGH VOLTAGE CIRCUITS ARE
CABLED SEPARATELY TO AVOID INDUCED VOLTAGES IN THE LOW
VOLTAGE CIRCUITS
.