Figure 5: Wiring Diagram - 3 Zone System
White-Rodgers 2 Wire Zone Valves
Figure 6: Wiring Diagram - 2 Zone System
Multiple Circulators
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.
