Questions? Please Contact Your Local Manufacturer’s Representative
SECTION 2 EDR-SOLA-IOM-2022-0216 INSTALLATION
2-43
4. For applications requiring a dry contact, use a 120
VAC control relay (P/N 2-45-880360), rated for 5 Amps
maximum.
` BURNER FIRE RATE OUTPUT
1. Fulton SOLA J10 plug terminals 4, 5, and 6 may be used
for either 4-20 mA or 0-10 VDC burner re rate output.
2. This can be used by an external control to monitor
burner re rate, or as a signal to a dedicated boiler
circulator variable speed drive.
3. The signal reverts to 4 mA / 0 VDC when idle.
4. For instructions on enabling this output, see the
Operation section.
` 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 24VAC power supply in the boiler
(TB2-81, TB2-82) or the power may be supplied by the
Building Automation System. The Protonode requires eld
conguration through the Web GUI after installation.
` REMOTE LEAD/LAG SYSTEM ENABLE
1. A contact may be utilized to enable and disable the
lead/lag boiler plant when integrated sequencing
capabilities are utilized. This is intended for the MASTER
boiler control panel only. Remove the 83-83A jumper
and wire to remote control panel.
2. When the contact is closed, the lead/lag system is
enabled and allowed to operate. When the contact is
open, the boilers will remain in a standby state.
` REMOTE BOILER ENABLE
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 individual boiler to
start. When the contact is open, the boiler will remain in
a standby 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. Both signal types require a 120 VAC relay (P/N
2-45-880360) wired to the REMOTE setting of the three
position control switch, rated for 5 Amps maximum. A
0-10 VDC signal additionally requires an analog signal
converter module (P/N 2-45-001140).
2. When using integrated cascade functionality, the
setpoint signal may be sent to the one boiler only.
` GENERAL ALARM CONTACT
A dry contact is provided for annunciation of a general alarm
condition. It is rated for 5 Amps maximum.
` EXTERNAL LOW WATER CUT OFF
1. This hydronic boiler in the standard conguration
includes one factory installed low water cut o (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 rom the boiler by
any valve.
3. Remove the H-W1 jumper, and wire the external LWCO
to the associated terminal blocks.
4. Alternate 120 VAC LWCO devices may be used. They are
wired to the same terminal blocks.
` ADDITIONAL HIGH LIMIT AQUASTAT
1. This hydronic boiler in the standard conguration
features a single factory installed UL 353 temperature
probe which functions as an electronic dual element
temperature sensor. This satises CSD-1 CW-400
requirements of two independent temperature control
devices. The authority having jurisdiction (AHJ) over the
installation may require the use of an additional, third,
high limit device to satisfy local code requirements. A
manual reset high limit (MRHL) mechanical Aquastat
(P/N 2-40-0000294) with a 200°F maximum setting may
be utilized where this functionality is required.
2. The Aquastat probe and thermowell are installed in the
outlet piping of the boiler. The thermowell must not be
isolated from the heat exchanger with any valve.
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