Electrical installer
Installation, use and maintenance manual – AY00-120
21
4
External request
(System (3) see also Paragraph 1.5
p. 10)
It is required to arrange:
▶
request device (e.g. thermostat, clock, button, ...) fitted with
a voltage-free NO contact.
How to connect the external request
Connection of external request is effected on the AY10
board located in the Electrical Panel inside the appliance
(Figure 4.5
p. 21).
1. Access the Electrical Board of the appliance according to the
Procedure 4.2
p. 18.
2. Connect the voltage free contact of the external device (De-
tail CS), through two wires, to terminals R and W (respec-
tively: common 24 V AC and heating request) of AY10 elec-
tronic board.
Figure 4.5
Wiring diagram, external heating enable connection
SCH
Electronic board
R
Common
W
Terminal consensus warming
Components NOT SUPPLIED
CS
external request
4.5
WATER CIRCULATION PUMP
It must be mandatorily controlled from the S70 electronic board.
The diagram in Picture 4.6
p. 22 is for pumps < 700 W. For
pumps > 700 W it is required to add a control relay and set up
Jumper J2 OPEN.
How to connect the CONSTANT FLOW circulating
pump
Access the Electrical Board of the appliance according to
the Procedure 4.2
p. 18:
1. connect to S70 board, to terminals NO-Contact;
2. Jumper J2 CLOSED.
