Connect a 120VAC / 15 amp supply to the "AC IN" tagged leads in the wiring box. The maximum
actual draw (with 5 typical residential size pumps) is less than 4 amp.
3.14.2.1 Load pumps
The 120 VAC power supply to the load pumps (P/V1, P/V2, P/V3, and P/V4) has been factory
installed and connected to P/V-L and P/V-N for your convenience. The upper four pairs of contacts on
this connector strip (labelled TB1) are then powered to manage up to four load pumps – the top pair
for Load 1, the second pair for #2 etc. Once the controller is programmed for the respective loads, the
boiler manages all the loads without need of further relays, for loads up to 1/3 HP. For loads drawing
over 1/3HP, use a protective relay.
3.14.2.2 Boiler pump
The boiler (primary) pump is factory-installed and wired.
Pumps can be switched on/off using the touchscreen controller, so there is no need for temporary
pump wiring during system filling / air purging.
The combined current of all load pumps connected through the on-board pump relays should not
exceed 10 amps. The control circuit board is protected using on-board field replaceable fuses. Each
pump is fused with a separate five Amp fuse. The Alarm contact is fused with a five Amp fuse and the
24VAC boiler control circuit is protected with a two Amp fuse.
The VS Output leads are not commonly used, except when providing a boiler output signal to an
external direct digital control (DDC), or a variable speed signal to a first-generation IBC air handler.
3.14.2 120VAC line-voltage hook-up
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