Figure 40b: Water Boiler - Pressure Relief Valve
Hook-Up
placement. The 14 gauge mounting bracket must be attached to the jacket first using four (4) #8 x ¾” drill point sheet metal screws.
One may find it easier to install some of the conduit
connectors with their corresponding conduit runs onto the RTC back panel before mounting to the bracket. The actual controller can and should be removed from the back panel during the mounting process. This will eliminate the potential for accidental damage to the controller. The RTC back panel is mounted onto the bracket with (4)
3 rear knockouts should be used before utilizing the 5 knockouts exiting the bottom of the control. Depending on the final configuration, most of the controller connections could be used. Typically, the return sensor, actuator control and boiler pump exit the rear of the controller.
Wire the RTC controller to the various components as shown below. The “Mix” and “Outdoor” sensor are optional and must be connected if outdoor reset function is desired. The outdoor reset function on this controller cannot be used in a multiple boiler application. A boiler sequencer must be used when an outdoor reset feature is required in a multiple boiler application.
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