FULTON Endura EDR 750 Nstallation, Operation And Maintenance Manual page 52

SECTION 2
EDR-PURE-IOM-210617
` 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 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.
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 signal may be sent
using an analog signal. This may be either 4-20 mA or
0-10 VDC.
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 6 Amps maximum.
` 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.
Tender No. MET21-117
Questions? Please Contact Your Local Manufacturer's Representative
` BOILER STATUS CONTACT
A dry contact is provided for remote monitoring of boiler
status. When the main gas valve is enabled, the contact is
closed.
` BOILER DEMAND CONTACT
A dry contact is provided for remote monitoring of boiler
demand. When the boiler has a call for heat, the contact is
closed.
` EMERGENCY STOP (E-STOP)
1. A contact is provided to perform an emergency
2. Opening the contact will shut down the boiler.
3. The E-Stop contact provides a 120 VAC signal. Do
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shutdown of the boiler. Remove the jumper and wire
to an emergency shutdown switch or remote control
panel.
not apply an external power source to the E-Stop
contacts; wire only to dry contacts.
Addendum #5 Page 52 of 105
INSTALLATION
2-45