Service Manual

GENERAL INFORMATION

Optional Controls (continued)

This control will interrupt the electrical current to the contactor coil when a low water level condition is sensed inside the

water heater tank. When the low water level condition is corrected the control will automatically sense the new situation

and electrical current will again energize the contactor coil. Normal water heater operation will be resumed.

To remove the low water level control from the tank you must first loosen the control by un-threading it from the tank

fitting and then rotating the control until the arrow printed on the side of the hex fitting is pointing downward. This will

enable the float orientation to align itself with the opening in the tank-fitting.

Low Water Level Control-

When installed, refer to the direction of the arrow on the hex and insure that it is pointing upwards. If it is not pointing

upward, the control switch will not activate when the tank is refilled with water. Refer to illustration below for clarification.

Heating Element Time Delay Sequencers-

Heating element sequencers are available in order to stage the activation of the heating elements thereby, reducing the

inrush of electrical current to the water heater. The sequencers will control one or more contactor coils depending upon

the water heater voltage, phase, and KW.

One contactor will be energized immediately when there is heating demand, the second contactor, controlled with a

sequencer, will be activated approximately 20 seconds later, and the third contactor will be activated in another 20

seconds thereby, staging the three contactors over the 40 second time period. The staging occurs in a similar manner

for applications having more than three contactors.

Refer to the Control Circuit Wiring Diagram for the specific application being serviced.

Note: On the occasion of servicing the water heater where frequent restarts in a short time interval are encountered (i.e.

on, off, on, etc.), the timing sequences will not begin until the sequencers have experienced a time interval to reset.

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