ROBUA GAHP A Series, Installation, Use And Maintenance Manual

Page: 27 / 44

Electrical installer
Installation, use and maintenance manual – GAHP A
27
4
Figure 4�4
Connexion câble CAN BUS for plants with one unit
DDC Direct Digital Control
SCH electronic board S61
J1 Jumper CAN-BUS in board S61
J21 Jumper CAN-BUS in board DDC
A terminal node connection (3 wires;
J1 and J21 = "closed")
H,L,GND data signal wires (ref. cables table)
External request
(System (3) see also Paragraph 1.7 p. 16)
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 S61
board located in the Electrical Panel inside the unit (Fig-
ure 4.5 p. 27):
1� Access the Electrical Board of the appliance accord-
ing to the Procedure 4.2 p. 24.
2� Connect the voltage free contact of the external de-
vice, through two conductor wires, to terminals R
and W (respectively: common 24 V AC and heating
enable) of electronic board S61 (Detail CS).
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
4.5.1
Option (1) CONSTANT FLOW circulating pump
It must be mandatorily controlled from the S61 electronic board.