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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.
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 eld
installed components, simplifying installation
and troubleshooting.
• Efciently 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.
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.
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 eld-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.
• 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 efciency.
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.