52
11.6 Hydraulic Unit (DHW)
For special areas, where water is harder than 200 ppm or 12
grains/ gallon, install polyphosphate dispenser or equivalent
treatment system, compliant with current regulations.
LEGEND
A
DHW Exchanger Screw
B
DHW Priority Sensor
C
Boiler/System Drain Tap
D
Controlled Fast Fill
E
DHW Temperature
NTC Probe
F
Low Water Pressure Cutoff
G
DHW Cold Inlet
H
DHW Outlet
11.7 Cleaning The Cold Water Filter
Boiler is fitted with cold water filter located on DHW hydraulic
assembly (
B
). To clean:
•
Drain domestic hot water system. (C - 150 only)
•
Remove the flow sensor on top of assembly.
•
Remove nut on DHW priority sensor unit using 18 mm
wrench. (B)
•
Pull out flow sensor and its filter.
•
Soak in white vinegar and water mixture for 20 minutes.
11.8 Final Commissioning
•
Perform Automatic Calibration function as detailed in
section 9.8.
•
Allow heating system to heat. Balance the system to
achieve temperature difference across heating supply and
return pipes at the boiler.
•
Check system for proper volume and pressure. See page 4
for acceptable volume and pressure.
•
Turn off boiler.
•
Thoroughly flush water pipe work.
•
Repressurize the system.
11.9 Final Assembly
•
Place front jacket in position over boiler. Secure in
position at top using screws previously removed.
•
If boiler is to be left in service with the User, set controls
and room thermostat.
•
If boiler is not to be handed over immediately, close boiler
gas service valve and turn off electrical supply.
•
If there is possibility of boiler being left during frost
conditions drain boiler and system. See section
11: Component Replacement Or Periodic Cleaning.
Manufacturer recommends attaching a label to the boiler
drawing attention to the fact that the system has been
drained.
Model DCCF-150
Hydraulic Assembly (Combi-150)
NOTICE
When replacing and/or cleaning “O-rings” on hydraulic
assembly (DHW), use only Molykote 111 as a lubricant,
not oil or grease.
11 - GENERAL MAINTENANCE AND CLEANING
H
H
G
G
LEGEND
A
DHW Exchanger Fixing Screw
B
DHW Priority Sensor With Filter
C
Boiler/System Drain Tap (150 Unit Only)
(
C-1 & C-2:
Access To Tap
C
- Bottom Of Boiler)
D
Boiler / System Filling Tap (150 Unit Only)
E
DHW Temperature NTC Probe
F
Low Water Cutoff
Model
B
A
Hydraulic Assembly (B)
F
E
240012879 REV A, [01/31/2020]
AA
BB
FF
EE
D
D
CC
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...
