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Burnham E4 User Manual

Page 7

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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 fl oat
type Air Vent. See Figure 1.