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INSTALLATION
ƒ Junction Box Locations for Field Wiring
Factory mounted junction boxes (Figure 26) are provided
at the rear of the boiler for routing eld wiring to the boiler
control panel. Do not run wiring directly through the
removable or hinged panels doors.
Electrical
Connections
FIGURE 26 LINE VOLTAGE AND LOW VOLTAGE
JUNCTION BOX LOCATIONS TYPICAL
ƒ Electrical and Controls Options
The electrical and controls options required and supplied
will vary depending on the unique requirements and piping
arrangements of the hydronic system. Refer to the separate
Technical Data Sheet or Manual of each device for additional
instructions. See Electrical Schematic Diagrams for locations
of eld wiring connections on the below electrical devices
and controls options. Refer to the separate Technical Data
Sheet or Manual of each device for additional instructions.
The rating of each external device contact is the maximum
allowable amperage of the contact. The total Full Load Amps
(FLA) of external devices wired to the boiler power circuit
cannot exceed 1A.
` LEAD/LAG INTEGRATED SEQUENCING WIRING
1. The Fulton PURE Control™ includes integrated
sequencing capabilities. When utilized, the boiler
control system will automatically stage boilers and
operate burner ring rates in parallel as necessary to
maintain a hydronic setpoint.
2-42
EDR-PURE-IOM-230608
2. The lead boiler and all lag boilers are rotated
automatically.
3. The supply header temperature sensor is used as the
Lead/Lag process variable and is required. Wire the
sensor to a boiler "Header RTD Supply" connection and
install downstream of the boilers in the common supply
water header for proper operation of the sequenced
plant.
4. Additional devices and sensors may be required, and
will vary by application.
5. Communication between the boilers is performed
using an Ethernet/IP network eld wired with Cat5e or
Cat6 cabling. An 8P8C ("RJ45") female connector port
is provided on the boiler. Two boilers may be directly
connected. For installations of 3 to 10 boilers a 10/100
Ethernet switch is required.
6. See the Operation section for information on
programming this feature.
7. Available as an option from the factory is a 16-port
Ethernet switch with a 120VAC power adapter using
a standard NEMA 1-15 plug, this device is intended
for eld installation in a clean dry area such as a
networking closet, rack, or panel enclosure. For
complete instructions, refer to the Technical Data sheet
for 2-45-315010 prior to installation.
FIGURE 27 ETHERNET IP FIELD WIRING FOR 2 45 315010
SECTION 2
© Fulton Group N.A., Inc. 2023
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