The Boiler Control 275 is designed to stage up to four condensing or non-condensing,
modulating or on-off boilers using P.I.D. staging to accurately maintain temperature. The
275 can control mixed boiler plants that contain both condensing and non-condensing
boilers.
Water temperature is controlled by outdoor temperature reset for space heating applications
or a fixed setpoint for Domestic Hot Water (DHW) tank heating or industrial process
heating applications.
The control will also accept an analog 0-10 V (dc) signal from an Energy Management
System (EMS) to control the water temperature. Boiler equal run-time rotation, pump
exercising and stand-by system pump operation increase boiler plant reliability. The
control is tekmarNet® communication compatible allowing for internet connectivity using an optional Gateway 483.

• Test sequencing Mix condensing & non-condensing boilers
• tekmarNet® communication
• Powered system pump output
• Optional domestic hot water priority
• Outdoor temperature reset
• Optional boiler pump(s) operation
• Automatic boiler differential
• Access levels & alerts
• Primary pump sequencing
• Programmable schedules