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INSTALLATION
` ALTERNATE COMMUNICATION PROTOCOL GATEWAY
Reference the Protonode Start-Up Guide for for BACnet
protocol.
Communication between the boilers and the Protonode
requires shielded three-wire twisted pair Belden 3106A or
equivalent. To access the full points list of each boiler, the
Modbus side of the Protonode wiring must be daisy-chained
to all boilers. Shield must be grounded at one end only
and tied directly to Earth ground. The Protonode may be
powered by the 24VDC power supply in the boiler (V1+, V1-)
or the power may be supplied by the Building Automation
System. The Protonode requires field configuration through
the Web GUI after installation.
` REMOTE BOILER ENABLE/DISABLE
1. A contact may be utilized to enable and disable each
boiler individually. Remove the jumper and wire to
remote control panel. The remote boiler enable/disable
provides a 24 VDC signal. Do not apply an external
power source to the remote boiler enable/disable
contacts; wire only to dry contacts.
2. Closing the contact enables the boiler to start. When
the contact is open, the boiler will remain in a disabled
state.
` REMOTE ANALOG SETPOINT
1. An external hydronic loop setpoint may be sent using
an analog 4-20 mA signal.
2. When using integrated lead/lag functionality, the
setpoint signal may be sent to one boiler only.
` GENERAL ALARM CONTACT
A dry contact is provided for annunciation of a general alarm
condition. It is rated for maximum 0.6 Amps at 24 VAC only.
2-40
` AUXILIARY(2
) LOW WATER CUT OFF
ND
1. This hydronic boiler includes one factory installed low
water cut off (LWCO) device in compliance with CSD-1.
Some authorities having jurisdiction (AHJ) may require
the use of a 2nd (auxiliary) LWCO.
2. Where required, a probe type LWCO (P/N 4-30-000330)
may be installed in the outlet piping of the boiler. The
probe must not be isolated from the boiler by any valve.
3. Remove the jumper, and wire the external LWCO to the
associated terminals. Install the LWCO relay.
4. Alternate LWCO devices may be used. They are wired to
the same terminal blocks.
` EMERGENCY STOP (E-STOP)
1. A terminal is provided to perform an emergency
shutdown of the boiler. Remove the jumper and wire
to an emergency shutdown switch or remote control
panel. Field wiring must be appropriate for the FLA
listed on the boiler data plate located at the rear of the
boiler.
2. Opening the contact will shut down the boiler.
3. The E-Stop terminal provides 120 VAC. Do not apply an
external power source to the E-Stop contacts; wire
only to dry contacts.
SECTION 2
EXE-IOM-230112
© Fulton Group N.A., Inc. 2023
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