Power Management, Quality And Electrical Protection; 120Vac Line-Voltage Hook-Up - IBC SL Series Installation & Operating Manual

3.13.1 Power management, quality and electrical protection

In areas of unreliable power, appropriate surge protectors and or power conditioning equipment
should be installed in power supply wiring circuits.
Note
The IBC boiler (like any modern appliance that contains electronic equipment) must
have a "clean" power supply, and is susceptible to power surges and spikes, lightning
strikes and other forms of severe electrical "noise". Power conditioning equipment
(surge protectors, APC or UPS devices) may be required in areas where power quality
is suspect.
In temporary or manual operation, for example in new construction heating, use a construction
thermostat or jumper with an in-line on/off switch for on/off management of the boiler. Do not turn off
the heat by removing power to the boiler. This will interrupt the moisture management routine (fan
turns at ultra low rpm for 90 minutes after burner shutdown) resulting in serious damage to the boiler.
Treat the boiler like a computer, where you do not just pull the plug when done.

3.13.2 120VAC line-voltage hook-up

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.
3.13.2.1 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,
3.13.1 Power management, quality and electrical protection
Line-voltage wiring is done within the field-wiring box (see
diagrams on page 105). 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 39 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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Wiring