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SERVICING GUIDE
This “Servicing Guide“ section of this Installation and Operation Installation
manual is provided for the purpose of improving the effectiveness and the
efficiency of servicing this water heater. This information is intended to assist
qualified service personnel. Servicing of this water heater may require
knowledge of electrical testing instruments. If you are unfamiliar or unsure of
the electrical circuits or the testing instruments, consult a qualified
electrician.
This section of these Installation and Operation Instructions is not intended
for use as a troubleshooting guide. For troubleshooting instructions please
contact the supplier from whom this water heater was purchased or the
manufacturer listed on the rating plate.
This water heater has two distinct electrical systems. One system connects
the electrical power to the heating elements, while the other system controls
the water heater operation. The electrical contactors interconnect these two
systems. In order to clearly illustrate the electrical circuits, two wiring
diagrams are provided. These diagrams are labeled as the “Power Circuit
Wiring Diagram” and the “Control Circuit Wiring Diagram” and they are
attached to the surface of the panels inside the water heater control cabinet.
Control Circuit Description:
This description will explain certain aspects of the Control Circuit. The
control circuit operates with 120VAC electrical service. This voltage is
provide by the multi-tap transformer which has the primary coil connected to
the field wiring that is serving the water heater. The Transformer, the Water
Heater Thermostat, the Hi-Limit Temperature Control, and the Contactor Coil
are always included in the Control Circuit.
Referring to the “Control Circuit Wiring Diagram“, the contactor coil is
energized when the Thermostat senses a need for heating. Electrical
current to the contactor coil will be interrupted when the water temperature is
sufficient to satisfy the temperature limits of the either the Thermostat or the
Hi-Limit Control. The Hi-Limit Control is provided with manual reset buttons.
