36
6 - HYDRONIC PIPING
Pressure gauge
- to indicate the system pressure to be
maintained.
By-pass (115,125)
- Boiler incorporates an automatic
by-pass, However, where all radiators are fitted with
thermostatic radiator valves, an external by-pass must be
fitted.
6.8 Central Heating System
Boiler is designed for use in a sealed central heating system.
Design the system to operate with flow temperatures of up to
176°F (80° C), take pump head, expansion tank size, mean
radiator temperature, etc. into account.
Boiler is supplied with the following components: Pressure
relief valve - 30.0 psi (2.1 bar). Boiler internal pressure switch
will shut boiler off at 43.5 psi /3.0 bar.
• Flow of water, certain minimums are required, will operate
the DHW flow switch which requests the 3 way valve to
change position. This will allow the pump to circulate the
primary water through the DHW plate heat exchanger.
(MAC-115, 150 & 205 only)
• Combustion fan will then come on and begin to run at
ignition speed.
• Once the fan reaches ignition speed the control board will
allow power to flow to the spark generator and gas valve
creating ignition in the combustion chamber. The flame
sensor will acknowledge the presence of the flame in the
combustion chamber and send a signal to the control
board.
• Temperature sensors will send a signal to the control board
allowing the control board to increase/ decrease the speed
of the fan. The combustion fan will in turn modulate the
gas rate accordingly.
• When the domestic hot water demand ceases the burner
will extinguish, unless there is a demand for central
heating.
6.10 Frost Protection Mode
Frost protection mode is integrated into the appliance when
electricity is connected to the boiler, regardless if power is "on"
or "off".
If temperature falls below 41°F / 5° C boiler will fire on its
minimum setting until flow temperature of 86°F / 30° C is
reached.
6.11 Pump Protection
Pump will automatically operate for 1 minute in every 24 hours
of inactivity to prevent seizing.
WARNING
Burn, Scald Hazard! Water temperature over 125°F
(51°C) can cause severe burns and scalding. See
User's Manual before setting water temperature.
Failure to follow these instructions could result in death
or serious injury.
!
• Priority is given to the domestic hot water supply.
Demand at tap or shower will override any central heating
requirement.
FIGURE 6-6
6.9 Domestic Hot Water Mode
Utica Boiler MAC 115, 150 & 205 and MAH 100, 125 &
165 with Indirect Tank
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...