Dunkirk DMG-240 Installation, Operation & Maintenance Manual page 43

4.
Analog Temperature-Based Control - 0 - 10 V
signal controls boiler supply temperature between 32ºF
(0ºC )and 176ºF (80ºC). Control modulates on basis
of supply temperature, heat output varies between
minimum and maximum values based on supply
temperature set point calculated by the controller.
Jumper 2 on the interface is used to select either
temperature control (
Input
Jumper 2
Signal (V)
0 - 1.5
1.5 - 1.8
1.8 - 10.0
5.
Analog Heat Output - Based Control - 0-10V signal
controls boiler output between 0% and 100%. Minimum
and maximum values are limited. Minimum output
is linked to boiler's modulation depth. Output varies
between minimum and maximum value on basis of value
determined by controller.
Input
Jumper 2
Signal (V)
0.0 - 2.0
%
2.0 - 2.2
1
2.0 - 10.0
1
Dependent on minimum modulation depth (set speeds, standard 20%)
(1)
6.
Analog Output - 0-10V - 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 (
Input
Jumper 1
Signal (V)
0
0.5
2.0 - 10.0
1
Dependent on minimum modulation depth (set speeds, standard 20%)
(1)
8 - ELECTRICAL CONNECTIONS
) or heat output control (%).
Temperature
Description
(°F/°C)
32-59
Boiler off
(0-15)
59.0-64.4
Hysteresis
(15.0-18.0)
64.4-176.0 Temperature
(18.0-80.0) required
Temperature
Description
(°F/°C)
32-68
Boiler off
(0-20)
68-72
Hysteresis
(20-22)
72-176 Temperature
(20-80) output required
) or heat output control (%).
Temperature
Description
(°F/°C)
32-59
Boiler off
(0-15)
59-72
Hysteresis
(15-20)
72-176 Temperature
(20-80) required
FIGURE 8-7 Analog Temperature Based Control
FIGURE 8-8 Analog Output 0-10V
43
P/N 240011656, Rev. E [07/30/2018]