120Vac Line-Voltage Hook-Up - IBC Sl Series Installation & Operating Manual

3.13.2 120VAC line-voltage hook-up

Connect a 120 VAC / 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.
3.13.2.1 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 4 pairs of contacts on
this green connector strip are then powered to manage up to 4 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 more – use a
protective relay).
3.13.2.2 Boiler pump
The boiler pump (primary pump) is powered by the white/yellow wire from the pair labeled "Boiler
Pump" (Primary Pump). This lead is factory wired to the controller (and its 120 VAC supply) at the
upper right backside of the controller board. Do not attempt to connect the primary pump to the
pump/zone valve terminal block along the controller's right edge - this is for the secondary pumps
and/or zone valves only. Connect the pump's black wire to the yellow of this pair (switched Hot). The
white/yellow pair should be individually capped if the primary pump does not obtain its power from this
pair (e.g. if a variable speed primary pump is connected to the mains power).
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
Line-voltage wiring is done within the field-wiring box (see
diagrams on page 101). Connect the boiler to the grid power using a
separate, fused circuit and on/off switch within sight of the boiler. Use
14-gauge wire in BX cable or conduit properly anchored to the boiler
case for mains supply and pump circuits.
Figure 48 Line voltage load pump terminals
Caution
The on-board controller load pump relays are protected with 5
Amp fuses. The maximum recommended load on each fuse
is 4 Amps (80% of rating). The maximum combined pump
load is 10 Amps. Isolation relays or contactors must be used
if the loads exceed these maximums.
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3.13.2 120VAC line-voltage hook-up
Wiring