Watts Tekmar Smart Boiler Control 294

Smart Boiler Control 294

The Smart Boiler Control 294 provides central and indirect domestic hot water heating or volume domestic hot water heating by operating up to four boilers. This can be expanded in groups of four boilers through the use of expansion controls up to a maximum of sixteen boilers. The 294 operates both condensing and non-condensing boilers that are either modulating, single, two, three or four-stage to provide a flexible, cost effective hybrid boiler plant solution. The Watts® OnSite web and mobile applications provide real-time remote monitoring, setting adjustments, and notifications.

  • Remote access using Watts OnSite web/mobile app and notifications through email, SMS or push messages
  • Operates 4 boilers, expandable up to 16 using expansion controls
  • Sequential or parallel staging for condensing and non-condensing boiler groups
  • Central heating using outdoor reset, indirect DHW, dedicated DHW, setpoint and tekmarNet calls
  • Supports reverse return, primary-secondary and variable primary flow piping systems
  • 5 inch color touchscreen with Setup Wizard for simplified installation


Agency Approvals CSA C US, FCC Part 15B, ICES-003 Class A
Ambient Conditions Indoor use only, 32 to 122 degrees F (0 to 50 degrees C), less than 90 percent RH Non-condensing, Altitude < 6560 feet (2000 m), Installation Category II, Pollution Degree 2
Calls 24 V (ac) or Short
Control Type Microprocessor control, this is not a safety (limit) control
Dimensions 9 IN H x 8 IN W x 2 11/32 IN D (229 x 203 x 60 MM)
Display 5″ color touchscreen
Enclosure Material Blue ABS plastic
Enclosure NEMA Rating NEMA 1
Modulating Output 0-10 V (dc) 500 ohms minimum load impedance / 4-20 mA 1 k ohms max load impedance
Power Supply 115 V (ac) plus / minus 10 percent, 60 Hz, 9 W
Pump Relay 230 V (ac), 5A, 1/3 hp
Sensor NTC thermistor, 10 k ohms at 77 degrees F (25 degrees C plus / minus 0.2 degrees C) Beta=3892