62
11 - GENERAL MAINTENANCE AND CLEANING
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 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
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 - 115 & 150)
•
165 Drain is field supplied/installed.
• Remove nut on DHW priority sensor unit using 18 mm
wrench. (B)
•
Pull out flow sensor and its filter.
• Remove any impurities.
11.8 Final Commissioning
• 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. Clean filters in heating
return and supply water isolating valves.
• 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 MAC-150 SHOWN
Model MAC-205 SHOWN
B
A
Hydraulic Assembly (B)
F
E
NOTICE
When replacing and/or cleaning “O-rings” on hydraulic
assembly (DHW), use only Molykote 111 as a lubricant,
not oil or grease.
240013354 REV A [07/01/2021]
Содержание Utica Boilers MAC-115
Страница 2: ...MAC 205...
Страница 4: ...MAH 165...
Страница 77: ...73 APPENDIX A WIRING DIAGRAMS A 2 MODEL 125 Heat Only 240013354 REV A 07 01 2021...
Страница 78: ...74 APPENDIX A WIRING DIAGRAMS A 3 MODEL 165 Heat Only 240013354 REV A 07 01 2021...
Страница 79: ...75 APPENDIX A WIRING DIAGRAMS A 1 MODEL 115 Combi 240013354 REV A 07 01 2021...
Страница 80: ...76 APPENDIX A WIRING DIAGRAMS A 4 MODEL 150 Combi 240013354 REV A 07 01 2021...
Страница 81: ...77 APPENDIX A WIRING DIAGRAMS A 5 MODEL 205 Combi 240013354 REV A 07 01 2021...
Страница 115: ...32 CIRCULATOR CONNECTIONS WIRING DIAGRAM Single Zone Circulator Wiring Using ARGO AR822 II PN 240011430 REV O 07 01 2021...
Страница 117: ...34 MODEL 125 Heat Only 125 HEAT ONLY WIRING DIAGRAM PN 240011430 REV O 07 01 2021...
Страница 118: ...35 MODEL 165 Heat Only 165 HEAT ONLY WIRING DIAGRAM PN 240011430 REV O 07 01 2021...
Страница 119: ...36 115 COMBI WIRING DIAGRAM MODEL 115 Combi PN 240011430 REV O 07 01 2021...
Страница 120: ...37 MODEL 150 Combi 150 COMBI WIRING DIAGRAM PN 240011430 REV O 07 01 2021...
Страница 121: ...38 MODEL 205 Combi 205 COMBI WIRING DIAGRAM PN 240011430 REV O 07 01 2021...
Страница 126: ...43 Low Water Cutoff Detail LOW WATER CUTOFF NO NO YES PN 240011430 REV O 07 01 2021...
Страница 131: ...48 3 FAULT SOLUTION SECTIONS PN 240011430 REV O 07 01 2021...
Страница 134: ...51 Parameter ID Changed From Changed To Date Reason PARAMETER CHANGE HISTORY PN 240011430 REV O 07 01 2021...
