Burnham ES2 manual Appendix H iq control system, IQ Control System Overview, IQ Boiler Control

APPENDIX H – iq control system

IQ Control System Overview

The “IQ Control System” consists of an IQ Boiler Control and an IQ Option Panel with optional “plug in” cards:

•Fully integrates both factory and field installed components, simplifying installation and troubleshooting.

•Efficiently operates the entire boiler system to save energy.

IQ Boiler Control:

The heart of Burnham’s IQ Control System is the IQ Boiler Control. The IQ Boiler Control replaces the traditional separate ignition control, primary boiler aquastat, as well as the fan and circulator relays.

The IQ Boiler Control stores two boiler supply temperature setpoints in its memory; one setpoint is for the High Limit Setting and the second is for the Operating Setpoint.

IQ Option Panel:

The IQ Option Panel works together with the IQ Boiler Control to provide an easy and convenient means to “plug-in” additional functionality to a boiler system.

•Ensures adequate heat and supply of domestic hot water.

•UL / CSA Listed or Recognized and tested as part of a complete system.

•Communicate with other EnviraCom™ enabled components to provide a complete system solution to maximize comfort and energy efficiency.

When the optional Outdoor Air Reset Card is installed in the IQ Option Panel, the Operating Setpoint temperature is automatically adjusted according to the outdoor temperature. For example, as the outdoor temperature increases the Operating Setpoint temperature is reduced from the High Limit Setting to save energy while improving home comfort. By better matching boiler heat supply to actual home heat demand, room air temperatures are more closely maintained. In addition, when there is a domestic hot water (DWH) heat request, the Operating Setpoint temperature is automatically adjusted to a DHW Setpoint to satisfy the DWH heating requirements. When the Outdoor

Air Reset Card is not installed the Operating Setpoint equals High Limit Setting.

The IQ Option Panel is a standard component provided along with the IQ Boiler Control. The IQ Option Panel functions as a “motherboard” to accept up to three (3) IQ Option Cards and provides the necessary mechanical connections (with no screws required), along with the power and interconnection wiring into the IQ Boiler System. Only wiring from field-installed sensors is required. The IQ Option Panel includes a dedicated digital readout that provides option card status information, diagnostics and setup functions when necessary.

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