37
A. Connect Room Thermostat
•
turn power off to boiler;
•
access terminal block
M2
;
•
connect room end switch to terminals
6(R)-7(W)
; Do
not apply dry volt between 2 terminals. Dry contact
only.
•
turn boiler power on;
•
verify room end switch operates per end switch
manufacturer's instructions.
NOTE:
maximum load allowed is 10 mA
Dry contact end switches from various manufacturers can be
attached to boiler control PCB.
FIGURE 8-4 Thermostat Connections
8.6 Install Themostat
Install room thermostat on inside wall. Do not install where it
will be influenced by drafts, hot or cold water pipes, lighting
fixtures, television, sun rays or near a fireplace.
Dry contact only - do not apply 24 volts between 6 and 7.
A
Thermostat
8 - ELECTRICAL CONNECTIONS
8.7 Optional Electrical Connections
A. 1K Ohm (1K
Ω) Outdoor Temperature Sensor
To connect this accessory, see figure 8-5, terminals 4-5, and
instructions supplied with
1K
Ω
sensor.
B. Setting "Kt" Climate Curve
When external
1K
Ω
sensor is connected to boiler, the
electronic board adjusts the flow temperature calculated
according to set Kt coefficient.
Select required curve by pressing
as indicated in
chart below for selecting the appropriate curve (00 to 90).
Flow temp
Outside temp
FIGURE 8-5 Outdoor Sensor Connections
NOTE:
Temperatures below -40 °F (-40 °C), maximum heating flow temperature set point no longer increases, curves shown
on graph become horizontal.
Boiler setpoint will override sensor setpoint.
FIGURE 8-6 Kt Climate Curves
80 Is Default.
1K
Ω
NOTICE
Sensors used for this boiler are proprietary to the
manufacturer. Use of after market sensors will diminish
boiler performance.
240012879 REV A, [01/31/2020]
Summary of Contents for Dunkirk DCBF-125
Page 63: ...61 A 1 MODELS 125 Heat Only APPENDIX A WIRING DIAGRAMS 240012879 REV A 01 31 2020...
Page 64: ...62 APPENDIX A WIRING DIAGRAMS A 2 MODELS 165 Heat Only 240012879 REV A 01 31 2020...
Page 65: ...63 A 2 MODELS 150 Combi APPENDIX A WIRING DIAGRAMS 240012879 REV A 01 31 2020...
Page 66: ...64 A 4 MODELS 205 Combi APPENDIX A WIRING DIAGRAMS 240012879 REV A 01 31 2020...
Page 67: ...65 NOTES 240012879 REV A 01 31 2020...
Page 68: ...66 NOTES 240012879 REV A 01 31 2020...
Page 99: ...29 MODEL 150F Combi 150F FLOOR STANDING COMBI WIRING DIAGRAM PN 240012875 REV A 01 31 2020...
Page 101: ...31 205F FLOOR STANDING COMBI WIRING DIAGRAM MODEL 205F Combi PN 240012875 REV A 01 31 2020...
Page 106: ...36 Low Water Cutoff Detail LOW WATER CUTOFF NO NO YES PN 240012875 REV A 01 31 2020...
Page 114: ...44 NOTES PN 240012875 REV A 01 31 2020...
