FULTON Endura+ Series Installation And Operation Manual page 48

INSTALLATION
` 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. See
section on Universal Data.
` GENERAL ALARM CONTACT
A dry contact is provided for annunciation of a general alarm
condition. It is rated for 6 Amps maximum.
` AUXILIARY (2ND) LOW WATER CUTOFF
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 120 VAC probe type LWCO (P/N 2-40-
000418) 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 install the low water relay into
the 2nd LWCO base.
4. Alternate 120 VAC LWCO devices may be used. They are
wired to the jumper terminal blocks.
` 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.
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` AUXILIARY SAFETY INTERLOCK FOR EXTERNAL DEVICES
1. When the Endura+ boiler receives a call for heat, the
startup sequence first checks for completed interlock
circuits. If an interlock circuit is open, the boiler control
will not begin the ignition sequence until it is closed.
2. A jumper is factory installed in the interlock circuits. For
applications requiring a safety interlock, this jumper
may be removed with terminals wired into the dry
contacts of an external device.
3. The interlock contacts provide a 24 VDC signal. Do not
apply an external power source to the interlock
contacts; wire only to dry contacts.
4. Typical uses for the safety interlock include but are
not limited to: motorized isolation valve end switches,
proof of exhaust draft assist fan operation, motorized
combustion air intake louvers.
5. Multiple safety interlocks may be used, wired in series.
6. Interlocks may be renamed for simpler troubleshooting.
` EMERGENCY STOP (E-STOP)
1. A contact is provided to perform an emergency
shutdown of the boiler. Remove the jumper and wire
to an emergency shutdown switch or remote control
panel.
2. Opening the contact will shut down the boiler.
3. The E-Stop contact provides a 120 VAC signal. Do
not apply an external power source to the E-Stop
contacts; wire only to dry contacts.
SECTION 2
© Fulton Group N.A., Inc. 2019