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1 - Integrated Boiler Control (IBC)
• Integrated Boiler Control (IBC) is a microprocessor
based controller for high ef
fi
ciency gas boilers.
• Controller monitors all safety controls which control
operation of combustion air blower, circulator pump,
burner, and combination hot surface igniter/
fl
ame
sensor.
• Controller is not intended for use with vent damper.
Controller is mounted on control panel inside boiler.
Contains
fi
ve diagnostic indicator lights.
2 - High Limit Control
NOTICE
Maximum set-point of limit control must not exceed
190°F.
• High limit control determines maximum boiler water
temperature and provides means for protecting boiler
and heating system from unsafe operating conditions
which could damage boiler.
• Control is mounted in ¾” NPT control well on top of front
boiler section at hot water outlet.
• Control is tied in with IBC and factory set at 190°F water
temperature.
• High limit set-point is
fi
eld adjustable and may be set
between 100°F and 190°F.
• Field set-point adjustment for each installation depends
on heating system requirements.
• Differentials are automatic, vary based on control
settings and boiler temperature.
• Refer to limit manufacturer instructions provided with
limit control.
CONTROLS AND ACCESSORIES
Figure 23 - Indicator Lights
A - Setting High Limit
To adjust, turn HI TEMP dial
1
until desired setting
is displayed. Overall range of High limit setting is from
100°F to 220°F (82° C to 104° C). High limit (HL) on limit
control is factory set at 190°F. Temperature setting may be
varied to suit requirements of installation. Differentials are
automatic and will vary based on control settings and boiler
temperature. See Figure 23.
B - Setting Economy Feature
• Economy feature is factory set for 1 zone heating
system. To adjust, turn ECONOMY dial until number
displayed equals number of heating zones.
• Do not include indirect water heaters in number of
heating zones.
• Economy feature conserves fuel by reducing boiler
temperature. If heating system is unable to supply
needed heat to house, ECONOMY dial should be turned
to lower setting. (example: in a three zone house, turn
dial to 2 or 1).
• Conversely, if boiler provides adequate heat, added
fuel savings can be achieved by selecting higher setting
(example: 4 or 5).
• If heating and indirect water heater signals were not
separated when wiring the control, Economy feature
should be turned off to ensure the boiler supplies
adequate temperature to heat indirect tank.