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8.1 General
Electrically bond boiler to ground in accordance with
requirements of authority having jurisdiction. Refer to:
• USA- National Electrical Code, ANSI/NFPA 70.
8.2 Electric Knockouts (Figure 8-1)
• Eight knockouts located on bottom of chassis.
A. Thermostat (Section 8-10)
B. Outdoor Reset (Section 8-9)
C. Frost Protections ( Section 8-12)
D. DHW Sensor (Sections 8-11, 8-13)
E. Release Input (
Section
F. Shutdown Input (Section 8-15)
G. Analog Input (Section 8-8, IF-01 board)
H. Analog Output (Section 8-8, IF-01 board)
I.
Alarm (IF02 or SCU-SO2 board)
J.
External Heat System Pump (Section 8-8, SCU-S02
board)
K. DHW Diverter/Pump (Section 8-8)
L.
External Gas Shutoff (Section 8-8)
M. Minimum Gas Pressure Switch (Section 8-8)
N. Solar Input (Section 8-8)
8.3 Electrical Connections
• Boiler requires 120V 60Hz power supply. Verify electrical
supply is polarized.
• Boiler shall be grounded and on dedicated circuit.
• Shall be one common isolator, providing electrical isolation
for boiler and any external controls. Using PVC insulated
cable 18 AWGx3C 221°F / 105 °C.
• All wiring must be installed in accordance with
requirements of the National Electrical Code and any
additional national, state, or local code requirements
having jurisdiction. All wiring must be N.E.C. Class 1.
• Canada, installation must conform to CSA C22.1 Canadian
Electrical Code Part 1 and any local codes.
• If replacing original boiler wiring use only TEW 105°C or
equivalent.
8 - ELECTRICAL CONNECTIONS
8-7)
!
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.
Wiring diagrams can be found in Section 14 of
Note
this Manual.
8-1
FIGURE
Electric Knockouts Bottom Of Boiler
8 Wire
Knockouts
40
Front of Boiler
Back of Boiler
P/N 240011656, Rev. E [07/30/2018]
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