Baxi LUNA DUO-TEC 1.70 User Manual page 30

10.7.2 CONNECTION OPTIONS FOR THE 0-10V CONTROL PCB (IF-01)
The IF-01 control PCB is built into the auxiliary control box.
Refer to the instructions supplied with the product.
CAUTION
Do not connect a freeze thermostat or room thermostat to
the boiler if using the 0-10 V control PCB.
CONNECTION STATUS (Nc)
If the boiler locks out, a relay is de-energized and an alarm can be transmitted via
a dry set of contacts (maximum 120 VAC-1A) on terminals Nc and C of the control board connection.
CONNECTION (OTm)
The interface communicates with the boiler control using an OpenTherm protocol. The OTm connection must be connected to the
OpenTherm input OT of the boiler control.
ANALOGUE INPUT (0-10V)
This control can be based on temperature or heat output. The two controls are described briefly below. For analog control, the 0-10
V signal must be connected to the interface.
ANALOG TEMPERATURE-BASED CONTROL
The 0 - 10 V signal controls the boiler supply temperature between 68ºF/20ºC and
176ºF/80ºC. This control modulates on the basis of the supply temperature, whereby
the heat output varies between the minimum and maximum values based on the supply
temperature set point calculated by the controller.
Jumper 2 on the interface is used to select either temperature control ( ) or heat output
control (%).
INPUT SIGNAL
JUMPER 2
(V)
0 - 1.5
1.5 - 1.8
1.8 - 10.0
ANALOG HEAT OUTPUT-BASED CONTROL
The 0-10V signal controls the boiler output between 0% and 100%. The minimum and maximum values are limited. The minimum
output is linked to the boiler's modulation depth. The output varies between the minimum and maximum value on the basis of the
value determined by the controller.
INPUT SIGNAL
JUMPER 2
(V)
0.0 - 2.0
% 2.0 - 2.2
1
2.0 - 10.0
1
(1) Dependent on the minimum modulation depth (set speeds, standard 20%)
ANALOG OUTPUT 0-10V
The temperature or heat output can be chosen for this feedback message. The two
controls are described briefly below.
Jumper 1 on the interface is used to select either temperature control ( ) or heat output
control (%).
OUTPUT SIGNAL
JUMPER 1
(V)
0
0.5
2.0 - 10.0
(1) Dependent on the minimum modulation depth (set speeds, standard 20%)
7703477.01 (1-03/18)
TEMPERATURE
(°F/°C)
32-59 / 0-15
59.0-64.4 / 15.0-18.0
64.4-176.0 / 18.0-80.0
TEMPERATURE
(°F/°C)
32-68 / 0-20
68-72 / 20-22
72-176 / 20-80 Heat output required
TEMPERATURE
(°F/°C)
32-59 / 0-15
59-72 / 15-20
72-176 / 20-80
DESCRIPTION
Boiler off
Hysteresis
Temperature required
DESCRIPTION
Boiler off
Hysteresis
DESCRIPTION
Boiler off
Hysteresis
Temperature required
30
1
1