Boiler Pump; Thermostat Wiring - IBC EBX Series Installation And Operation Manual

Figure 14 Line voltage load pump terminals
The Neutral connection is necessary for 120V operation of the boiler pump.

6.12.3 Boiler pump

The boiler pump is factory installed and wired. It has three speeds to choose from. The installer may
adjust the speed setting to best match the system requirements. See section 3.8 for boiler pump
curve chart.

6.12.4 Thermostat wiring

Thermostat-type control wiring will go to the three terminals of the CN2 block; these are labeled
"VAC24-R / VAC24-W / VAC24-C"). Closing a dry contact between terminals 1 and 2 (VAC24-R &
W) initiates a call for heat.
For a load with multiple zones (e.g. thermostats controlling zone valves), wiring the end-switches
of each zone valve in parallel to terminals 1 and 2 presents a common thermostat signal to the
controller.
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6.12.3 Boiler pump