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Explains the control's display, buttons, and menu system.
Details on display segments and symbol meanings.
Access control, boiler demand input, and outdoor reset.
Adjusts heating curve based on terminal unit and room temp.
Configures design temps, WWSD, and boiler operation modes.
Settings for boiler limits, stage delay, mass, rotation, and fixed last.
Settings for C.A./Alert relay, boiler differential, staging, and fire delay.
How DHW demands are received and configured.
Parallel DHW modes, differential, and unoccupied settings.
Primary/secondary and dedicated DHW modes.
Settings for DHW priority, purge, and low temp boiler considerations.
Setpoint demand, modes, priority, and unoccupied settings.
Setpoint modes, priority override, and post purge settings.
Configuring EMS input signals and fine-tuning.
Primary pump operation, stand-by logic, and flow proof requirements.
Settings for pump proof delay, rotation, purge, exercising, and time clock.
Configuring schedules, types, modes, and boost function.
tN4 system integration features including communication, load shedding, cycle length, feedback, and device count.
Procedures for preparing, mounting, and wiring the control.
Wiring for various demand inputs, EMS, and tN4 devices.
Connecting sensors and wiring primary/boiler pump outputs.
Testing relays, tN4 network continuity, and EMS voltage.
Testing sensors, pumps, relays, and control input power.
Testing demands, cleaning control, and configuring DIP switches.
Setting DIP switches for rotation, lead, sequencing, and firing order.
Displays outdoor air, boiler supply, target, and DHW temps.
Displays running times for boilers and pumps.
Basic settings for operation mode, room temps, EMS, boost, and Boiler 1.
Settings for boilers 2-4, design temps, terminal unit, and boiler limits.
Settings for boiler differential, staging, fire delay, proof demand, and damper delay.
Settings for boiler mass, pump purge, cycle length, DHW mode, sensor, and temps.
Settings for DHW differential, exchange, boiler, setpoint modes, and temperatures.
Settings for zone load shedding, priority, WWSD, pump rotation, and boiler alarm.
Configuring current time, date, DST, and year.
Configuring heat schedule, type, mode, and event times.
Configuring event times for different day groupings.
Configuring event times for specific weekdays.
Configuring access level, units, device count, defaults, and type.
Performing test sequences, Max Heat, and Zone Test modes.
Errors related to menu settings and tN4 bus communication.
Errors related to schedules, sensors, and device communication.
Errors related to pumps, dampers, boiler alarms, and DHW.
Technical data and warranty information for the Boiler Control 274.
Explains the control's display, buttons, and menu system.
Details on display segments and symbol meanings.
Access control, boiler demand input, and outdoor reset.
Adjusts heating curve based on terminal unit and room temp.
Configures design temps, WWSD, and boiler operation modes.
Settings for boiler limits, stage delay, mass, rotation, and fixed last.
Settings for C.A./Alert relay, boiler differential, staging, and fire delay.
How DHW demands are received and configured.
Parallel DHW modes, differential, and unoccupied settings.
Primary/secondary and dedicated DHW modes.
Settings for DHW priority, purge, and low temp boiler considerations.
Setpoint demand, modes, priority, and unoccupied settings.
Setpoint modes, priority override, and post purge settings.
Configuring EMS input signals and fine-tuning.
Primary pump operation, stand-by logic, and flow proof requirements.
Settings for pump proof delay, rotation, purge, exercising, and time clock.
Configuring schedules, types, modes, and boost function.
tN4 system integration features including communication, load shedding, cycle length, feedback, and device count.
Procedures for preparing, mounting, and wiring the control.
Wiring for various demand inputs, EMS, and tN4 devices.
Connecting sensors and wiring primary/boiler pump outputs.
Testing relays, tN4 network continuity, and EMS voltage.
Testing sensors, pumps, relays, and control input power.
Testing demands, cleaning control, and configuring DIP switches.
Setting DIP switches for rotation, lead, sequencing, and firing order.
Displays outdoor air, boiler supply, target, and DHW temps.
Displays running times for boilers and pumps.
Basic settings for operation mode, room temps, EMS, boost, and Boiler 1.
Settings for boilers 2-4, design temps, terminal unit, and boiler limits.
Settings for boiler differential, staging, fire delay, proof demand, and damper delay.
Settings for boiler mass, pump purge, cycle length, DHW mode, sensor, and temps.
Settings for DHW differential, exchange, boiler, setpoint modes, and temperatures.
Settings for zone load shedding, priority, WWSD, pump rotation, and boiler alarm.
Configuring current time, date, DST, and year.
Configuring heat schedule, type, mode, and event times.
Configuring event times for different day groupings.
Configuring event times for specific weekdays.
Configuring access level, units, device count, defaults, and type.
Performing test sequences, Max Heat, and Zone Test modes.
Errors related to menu settings and tN4 bus communication.
Errors related to schedules, sensors, and device communication.
Errors related to pumps, dampers, boiler alarms, and DHW.
Technical data and warranty information for the Boiler Control 274.
General| Category | Controller |
|---|---|
| Input Voltage | 24 VAC |
| Output Voltage | 24 VAC |
| Display | LCD |
| Operating Temperature | 32 to 122°F (0 to 50°C) |
