INSTALLATION AND OPERATION INSTRUCTIONS
2-6
DC SERIES COMBI BOILERS DC 23-84, DC 29-106, DC 33-124, DC 33-160
PARAMETER 1
SETTINGS
LOAD PRIORITY:
0 = HIGHEST
PARAMETER NUMBER 1: DETAILED DESCRIPTION
0 0 = Tankless DHW
1 = Space Heating
DC Models – Both Space Heating and Tankless DHW
• Internal Boiler Pump is enabled with a call for Space Heating
• Internal Boiler Pump is disabled with a call for Tankless DHW
1 0 = Indirect DHW Tank Sensor
or Aquastat
1 = Space Heating
HC Models – Space Heating and Indirect DHW Tank
• Aquastat or Sensor connected to X4.9 and X4.10
• Internal Boiler Pump is enabled for both Space Heating and for DHW
heating
• External Pump Terminals 4,5,6 (120Vac - 1Amp Max) enabled with a
call for DHW
2 0 = Tankless DHW DC Models – Tankless DHW Only
• DHW only, Space Heating Disabled
• Internal Pump disabled
3 0 = Space Heating HC Models – Space Heating Only
• Internal Boiler Pump is enabled with a call for Space Heating
4 0 = DHW Storage Tank Sensor
or Aquastat
1 = Space Heating
DC Models – Space Heating and Tankless DHW with a Storage Tank
• Aquastat or Sensor connected to X4.9 and X4.10
• External Pump Terminals 4,5,6 (120Vac - 1Amp Max) enabled with a
call for DHW
• Internal Boiler Pump is enabled with a call for Space Heating
• Internal Boiler Pump is disabled with a call for Tankless DHW
• External DHW Pump is enabled with a call for Tankless DHW
5 0 = DHW Storage Tank Sensor
or Aquastat
DC Models – Tankless DHW with a Storage Tank Only
• Space Heating is disabled
• Aquastat or Sensor connected to X4.9 and X4.10
• External Pump Terminals 4,5,6 (120Vac - 1Amp Max) enabled with a
call for DHW
• Internal Boiler Pump disabled
• Internal Boiler Pump is disabled with a call for Tankless DHW
6 0 = Tankless DHW
1 = Indirect DHW Tank Sensor
or Aquastat
2 = Space Heating
DC Models – Space Heating, Indirect DHW Tank and Tankless DHW
• External Pump Terminals 4,5,6 (120Vac - 1Amp Max) enabled with a
call for DHW
• Internal Boiler Pump is enabled for both Space Heating and for Indirect
DHW
• Internal Boiler Pump is disabled with a call for Tankless DHW
NOTE: The control displays codes that include upper and lower case letter and a combination with a period after the letter.
Example: C, c., c are all valid parameter codes. When adjusting settings, double check that you are in the correct parameter.
To Next Page
