3.14.1 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.
3.14.2 120VAC line-voltage hook-up
Line-voltage wiring is done within the field-wiring box (see Wiring diagrams on page 114). 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 secured to the boiler case for mains
supply and pump circuits.
Figure 40 Line voltage load pump terminals
Caution
The on-board controller load pump relays are protected with five Amp fuses. The
maximum recommended load on each fuse is four 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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