IBC V-10, Manual, Page: 91 / 103

Term Definition
Heating
curve Summarized as the ratio at which the water temperature increases as the outdoor
temperature decreases.
Heating
Enabled The boiler is powered and there is a Call for Heat, Heat is Required. The boiler will start
and enter the Heating Cycle unless it is in an error mode.
Heat pump Uses electricity to draw heat out of a building in the summer (to cool the space) and
heat from the outside air to indoors in the winter time (to warm the space).
Heat
Required Temperature sensors on the boiler indicate that water temperature is below the water
temperature target or setpoint.
Indoor ° From If an indoor temperature sensor is being used, the sensor will normally be connected to
the TB2 Indoor Sensor terminals on the controller board. Alternatively the TB2 2nd
Loop Sensor input terminals can be wired to the indoor temperature sensor. If using
TB2 2nd Loop Sensor, you must configure the Indoor ° From setting as Sec. Loop. Use
for shop or warehouse, but not for residential properties.
HVAC Heating, ventilation and air conditioning system.
Master
Rotation Rotates the role of active master between any boilers configured as Primary or
Secondary Masters on the network. This feature confirms that master redundancy is
functioning properly. The time between master rotations is 24 hours. The active master
will not attempt to pass the role of active master to a master currently in an Error or
Circulating state, or to a Secondary Master currently servicing an opt out load.
n/c Not connected
NTP Server Network Time Protocol
Opt out A term used by IBC to describe a boiler that "opts out"or becomes unavailable to a
network to satisfy a request. Typically, opt out boilers are used and dedicated to
service DHW.
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11.0 Definition of terms