Crown Boiler 24-11 Benutzerhandbuch

43

  ELECTRIC WIRING - Install all field wiring in 

accordance with the National Electric Code and Local 

Regulations.

 

Control voltage and/or 3-phase line voltage must 

be supplied to the burner panel box through a fused 

disconnect.

 

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.

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