Specifications

7
Staging and Modulation
• The ABC can be connected to external staging controls via a
4-20 mA and heat demand contact.
• External controls can modulate the boiler's firing rate in
order to satisfy overall system demand.
• No external relays or adapters are required.
Energy Management System (EMS)
Compatible
• Can be connected to a building’s energy management
system (EMS) using simple menu selections and wiring a
4-20 mA input.
• Connects to EMS using modbus protocol
• Allows EMS controls to adjust either the ABC central heating
setpoint or the firing rate which allows it to be compatible
with EMS controls that develop energy efficient setpoints
based on outside air temperature, solar loading, and actual
room air temperatures.
“Night Setback” and “Unoccupied”
Control Modes
• EnviraCom™ enabled, allows the boiler to communicate
directly with Honeywell EnviraCom™ thermostats.
• Allows the boiler to further enhance system efficiency by
reducing the water temperature during “sleep” and “away”
modes.
Reliability
• Built-in brown-out protection, with no additional devices
such as “brown out relays” required.
• Internal fuse protection for pump outputs is NOT REQUIRED.
The control is capable of handling up to 15 amps, and
does not require additional relays to switch power to the
circulators in most installations.
Ease of Connectivity…
Line Voltage
Terminal Strip
• 120V AC power, pump outputs
• Strip slides out & hooks to
boiler for easy access
Low Voltage
Terminal Strip
• Adds additional inputs for
header and DHW sensors
Cat 5 Connections
• Enables easy connections between boilers or between boiler and
building management system
• Utilizes ordinary RJ-45 (Cat 5 Ethernet) cord