RBI Boiler, Installation And Operation Instructions Manual

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10.1.4 - Connection to an
analogic 0-10Vcc input
On appliances model 399, 500, 750
and 1000 it is factory supplied a
0-10Vcc interface (199 model can be
equipped on demand).
This 0-10Vcc interface give you the
opportunity to drive the appliance via
a 0-10Vcc analogic input. To do this,
you have to connect the 0-10Vcc
supply between terminals 22 and 23
(see Figures 10-4 and 10-5). Also,
the CH mode (parameter 2003 as per
Section 14.14) must be set to 4 value.
Now the heater can start to receive
the analogic input 0-10Vcc and it will
control the supply temperature under
the rules as explained in Figure 10-3
where:
- if the input voltage is growing up to
1.5V, the heater stay OFF;
- if the input voltage move between 1.5V
and 2.0V the heater start to work
and the supply temperature stay at
the value set on parameter 3018
(Minimum CH setpoint, see Section
19)
- if the inpult voltage move between 2V
and 10V, the supply temperature will
change proportionally between the
Minimum CH setpoint (parameter
3018, see Section 19) and the
Maximum CH setpoint (parameter
3017, see Section 19)
10.1.5 - Connection to the
MODBUS interface
On appliances model 399, 500, 750
and 1000 it is factory supplied a
MODBUS interface (199 model can
be equipped on demand).
This MODBUS interface can be
connected to drive the unit from
a building management device.
Instructions on this matter are
supplied on demand
10 - INSTALLATION - Electrical connections
Figure 10-2 Room thermostat location
Figure 10-3 0-10Vcc analogic input algorithm