N.ELECTRIC WIRING - Install all field wiring in accordance with the National Electric Code and Local Regulations.
Control voltage and/or
When using the RTC, a separate fused control circuit shall feed the control to allow the exercising of the valve actuator and boiler circulator during dormant boiler operation.
Review electrical schematics in Appendix A and Burner Electrical Diagram for more information.
O.RETURN TEMPERATURE CONTROL AND COMPONENTS
1.Valve Actuator – The valve actuator is mounted to the top of the diverting valve. Mount and connect the actuator as illustrated in Appendix C. The electrical connections depend on valve orientation. Use Figures 39a and 39b as a guide.
2.Return Sensor – A sensor has been included with the Return Temperature Control. The sensor must be mounted for proper operation. The sensor is mounted in the 3 inch NPT x 12 inch special return nipple. The sensor must be inserted into the ¼ NPT connection using pipe dope. The 3” nipple must be inserted with the sensor closest to the boiler, using the rear lower right connection. (Orientation based on viewing the boiler from the rear.) The sensor
shall be connected to the RTC through a junction box located above the nipple. Use grommets and conduit to protect the leads and connection back to the RTC controller.
3.Knock Down Boiler Installations – The installation instructions above must be followed for all knockdown boilers as well. The controller is mounted on the front jacket panel at the top right. See Figures 41 and 42 for general component
Figure 39b: Diverting Valve/Actuator Wiring
(CW - Open to System)
Figure 39a: Diverting Valve/Actuator Wiring | Figure 40a: Steam Boiler - Safety Valve |
(CCW - Open to System) |
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