D.Indicator Lights
There is an indicator light for each heating element. If an indicator light is “on” it indicates its respective heating element is energized. If the light is “off” it indicates:
1.The heating element has not been energized.
2.The heating element sequencer is malfunctioning.
E.Built-In Air Eliminator
An air eliminator has been built into the top of the electric boiler and a 3/4" tapping is provided with nipple and tee for connection of Relief Valve and a float type Air Vent. See Figure 1.
Figure 5: Wiring Diagram - 3 Zone System
White-Rodgers 2 Wire Zone Valves
Figure 6: Wiring Diagram - 2 Zone System
Multiple Circulators
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