Robur G 30, Installation, Use And Maintenance Manual

Page: 40 / 64

Electrical installer
40
4
Figure 4.7 USB/RS485 converter connection
A A signal
B
B signal
C OTRG005 thermoregulator
D USB/RS485 converter
1 2
J1
1
J2
1
2
J3
J4
J5
J6
JP
1
2
1
2
1
2
2 3 4 5
A
B
C
D
4.4.8 External request
Depending on the required operation, it is required to
arrange:
▶
Request device (e.g. thermostat, timer, switch, ...)
equipped with a voltage-free NO contact, used for
managing start/stop of the gas unit heater.
▶
Request device (e.g. switch) equipped with a volt-
age-free NO contact, for managing the two power lev-
els of the gas unit heater, only if the default modulat-
ing mode is not desired.
Refer to the wiring diagrams in Paragraph 1.4 p. 18 for
details of the position of the appliance's terminal block
contacts.
All the contacts for external requests of the ter-
minal block in the electrical panel inside the
unit have a 230 V voltage applied to the relative
terminals.
4.4.8.1 Gas unit heater start/stop management
How to connect the external request for gas
unit heater start/stop management
1. Access the electrical board of the appliance according
to the Procedure 4.2 p. 35.
2. Connect the external request, using a 2x0,75 mm²
FRO-HP cable, to the "HEAT." contact of the terminal
block as shown in Figure 4.8 p. 40.
The cable may not be longer than 20 metres.
Figure 4.8
Connection of external request for gas unit heater
start/stop management
Z9 External request (e.g. thermostat, timer, switch, ...)
Z9
L N
AUX OUT
VENT. HEAT.
RESET
L N
AUX OUT
J60
4.4.8.2 Power level control
The standard operation of the gas unit heater is in
modulation, thanks to the presence of the supplied
room probe. Only in the presence of particular
needs can it be appropriate to switch to operation
on two power levels.
How to connect the external request for gas
unit heater power level management
1. Access the electrical board of the appliance according
to the Procedure 4.2 p. 35.
2. Connect the external request, using a 2x0,75 mm²
FRO-HP cable, to the "VENT." contact of the terminal
block as shown in Figure 4.9 p. 41.
The gas unit heater operates at maximum power
when the "VENT." contact is closed, while it oper-
ates at minimum power when the "VENT." contact