WIRE THE BOILER
9. WIRE THE BOILER
A.CONNECT SUPPLY WIRING
1.All wiring must be done in accordance with local codes, the National Electrical Code ANSI/NFPA70 and/or the Canadian Electrical Code Part I, CSA C22.1, Electrical Code and other controlling agencies or governing bodies.
NOTICE
The boiler/burner must be electrically grounded in accordance with the requirements of the authority having jurisdiction, or in the absence of such requirements, with the current edition of the National Electrical Code, ANSI/NFPA Number 70 and/or the Canadian Electrical Code Part I, CSA C22.1, Electrical Code.
2.Use #14 gauge or heavier wire for supply wiring. Protect the circuit with a fused disconnect switch (by others) and a grounded neutral.
3.Mount an electrical junction box on the boiler Front Panel for connection of supply wiring and distribution to the boiler controls. See Figure 9.1.
Figure 9.1: Typical Control Layout and Wiring
B.PREPARE REMAINING CONTROLS
1.Mount the control transformer on the junction box as shown in Figure 9.1.
2.Mount a junction box near each Gas Control Train for connection of conduit and wiring distribution to the gas train components.
C.INSTALL CONTROL WIRING
1.Wire the boiler according to the wiring diagram supplied with the boiler (in the Control Envelope). Figure 9.1 is a typical layout of the components on the boiler. Figures 9.2 and 9.3 are examples of standard wiring systems. Use these drawings for general reference only.
2.Low Energy Safety Control wiring must follow the contour of the boiler. Some local codes may require that all wiring, even low voltage, be routed in conduit.
3.Install all line voltage wiring in conduit.
4.Do not install single pole switches, including safety controls, in a grounded line.
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