VII. Electrical
DANGER
Positively assure all electrical connections are unpowered before attempting installation or service of electrical components or connections of the boiler or building. Lock out all electrical boxes with padlock once power is turned off.
WARNING
Failure to properly wire electrical connections to the boiler may result in serious physical harm.
Electrical power may be from more than one source. Make sure all power is off before attempting any electrical work.
Each boiler must be protected with a properly sized fused disconnect.
Never jump out or make inoperative any safety or operating controls.
The wiring diagrams contained in this manual are for reference purposes only. Each boiler is shipped with a wiring diagram attached to the front door. Refer to this diagram and the wiring diagram of any controls used with the boiler. Read, understand and follow all wiring instructions supplied with the controls.
A.Install Boiler Wiring
1.Knockdown boilers only. Locate wiring harnesses in Combination Boiler Parts and Control Carton. Refer to Table 10 and connect wiring as shown on the appropriate wiring diagram.
2.Connect supply wiring and electrically ground boiler in accordance with requirements of authority having jurisdiction, or in absence of such requirements the National Electrical Code, ANSI/NFPA 70 and/or CSA C22.1 Electrical Code.
B.Wire Vent Damper (if used; required on 805H, optional on 806H - 810H). See Figure 26.
1.Attach Vent Damper Harness to mounting hole in Jacket Left Side Panel. Install Cable Clamp around flexible conduit and attach to Jacket Top Panel.
2.Remove factory installed Jumper Plug from Vent Damper Receptacle on Vestibule Wiring Harness and discard.
3.Plug Vent Damper Harness Plug into Vent Damper Receptacle. See Figure 26.
C.Install thermostat. Locate on inside wall approximately 4 feet above floor. Do not install on outside wall, near fireplace, or where influenced by drafts or restricted air flow, hot or cold pipes, lighting fixtures, television, or sunlight. Allow free air movement by avoiding placement of furniture near thermostat.
Set heat anticipator to match control system requirements. Refer to Table 9.
D.Wire thermostat. Provide Class II circuit between thermostat and boiler. Refer to appropriate wiring diagram for control system being used.
Figure 28: Vent Damper Schematic Wiring Diagram
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