Electrical Connections; Line Voltage Connections; External Connections - Dunkirk DKVLT-050 Installation, Operation & Maintenance Manual

8.1 General
Electrically bond boiler to ground in accordance with
requirements of authority having jurisdiction. Refer to
National Electrical Code, ANSI/NFPA 70.
8.2 Electric Knockouts (Figure 8-1)
• Five knockouts located on bottom of chassis.
A. Three knockouts located under junction box are
reserved for high voltage wires. Choose connectors
using total diameter of wire bundles.
B. Two knockouts located to right of high voltage
knockouts (outside of junction box) are reserved
for low voltage wiring. Use supplied grommets
when using these knockouts.
8.3 Line Voltage Connections (Figure 8-2)
• Boiler
A. Provide individual 120V, 15 amp circuit
(recommended) with fused disconnect or service
switch as required by authority having jurisdiction.
B. Open High Voltage Junction Box (see Figure 3-4) to
access line voltage terminal strip.
C. Connect 120 VAC circuit to line voltage terminal
strip 120 VAC L,N,G.
• Central Heating Pump, if used.
A. Isolate pump from control module if pump FLA (Full
Load Amps) exceeds 2 amps (or 1 amp if external
DHW pump is used).
B. Connect pump to line voltage terminal strip CH
PUMP L,N,G.
• Domestic Hot Water Pump, if used.
A. Isolate pump from control module if pump FLA
exceeds 1.0 amp.
B. Connect pump to line voltage terminal strip DHW
PUMP L,N,G.
8.4 External Connections (Figure 8-3)
• User Interface Terminals
A. Factory wired to USER INTERFACE terminals
B. Optional - Remote mount user interface for
improved access. Use low voltage knockout.
C. Maximum wire length is 100 ft (30m) for 22 ga.
wire, or 150 ft (45m) for 18 ga. wire.

8 - ELECTRICAL CONNECTIONS

8-1 ELECTRIC KNOCKOUTS BOTTOM OF BOILER
(1.6m)

8-2 LINE VOLTAGE CONNECTIONS

27
WARNING
!
Electrical shock hazard. Turn OFF electrical power
supply at service panel before making electrical
connections. Failure to do so could result in death
or serious injury.
NOTICE
Wiring diagrams can be found in Section 14 of this
Manual
.
High Voltage
Knockouts
5"
4½"
(1.4m)
Front of Boiler
Low Voltage
Knockouts
(Use supplied
grommets when using
these knockouts)
Back of Boiler