58
10.5 Frost Protection
Boiler monitors supply and return water temperatures to
enable frost protection which automatically turns boiler and
pump on.
If water in boiler falls below 41°F (5°C), providing boiler is
connected to power, boiler will operate until water temperature
in the system reaches approximately 86°F (30°C).
Frost protection is for boiler only and not for complete Central
Heating System.
10.6 Pump
If electricity is connected to the boiler, regardless if power is
"On" or "Off" and has not operated for 24 hours for heating
or hot water, boiler pump will operate automatically for one
minute every 24 hours.
10.7 Low Water Pressure Sensor (Internal)
Device protects primary exchanger from damage. It will not
allow boiler to run in a LOW water pressure situation. Low water
condition occurs when water pressure drops below 7.0 psi (0.5
bar).
10 - OPERATING INSTRUCTIONS
240013354 REV A [07/01/2021]
Summary of Contents for Utica Boilers MAC-115
Page 2: ...MAC 205...
Page 4: ...MAH 165...
Page 77: ...73 APPENDIX A WIRING DIAGRAMS A 2 MODEL 125 Heat Only 240013354 REV A 07 01 2021...
Page 78: ...74 APPENDIX A WIRING DIAGRAMS A 3 MODEL 165 Heat Only 240013354 REV A 07 01 2021...
Page 79: ...75 APPENDIX A WIRING DIAGRAMS A 1 MODEL 115 Combi 240013354 REV A 07 01 2021...
Page 80: ...76 APPENDIX A WIRING DIAGRAMS A 4 MODEL 150 Combi 240013354 REV A 07 01 2021...
Page 81: ...77 APPENDIX A WIRING DIAGRAMS A 5 MODEL 205 Combi 240013354 REV A 07 01 2021...
Page 117: ...34 MODEL 125 Heat Only 125 HEAT ONLY WIRING DIAGRAM PN 240011430 REV O 07 01 2021...
Page 118: ...35 MODEL 165 Heat Only 165 HEAT ONLY WIRING DIAGRAM PN 240011430 REV O 07 01 2021...
Page 119: ...36 115 COMBI WIRING DIAGRAM MODEL 115 Combi PN 240011430 REV O 07 01 2021...
Page 120: ...37 MODEL 150 Combi 150 COMBI WIRING DIAGRAM PN 240011430 REV O 07 01 2021...
Page 121: ...38 MODEL 205 Combi 205 COMBI WIRING DIAGRAM PN 240011430 REV O 07 01 2021...
Page 126: ...43 Low Water Cutoff Detail LOW WATER CUTOFF NO NO YES PN 240011430 REV O 07 01 2021...
Page 131: ...48 3 FAULT SOLUTION SECTIONS PN 240011430 REV O 07 01 2021...