Service Manual

Page 6
GENERAL INFORMATION
Optional Controls
High and Low Water Pressure Controls-
These controls interrupt the electrical current to the contactor coil when the pressure settings are exceeded. The
operation and setting of these controls are described in the manual provided by the control manufacturer. This manual is
included with the water heater Installation and Operating Instruction manual provided with the water heater.
The pressure settings for these controls are adjustable. These controls are specified for use when the installation has
unique pressure requirements that must be safeguarded. Therefore, before adjusting the pressure values, it is
recommended that you consult the person responsible for the facility that the water heater is servicing.
The electrical connections are referenced in the Control Circuit Wiring Diagram and in the pressure control manual
provided by the control manufacturer. Refer to these instructions when servicing the controls.
2-1/8 Hex
Screw-in Flange
Terminal Block
Screw
Terminal Block
Zinc Plated Copper or
Incoloy Sheath
Element Rating Ink Stamped
on face of Terminal Block.
Direct Immersion “Screw-in” Type Heating Element
Standard Controls (continued)
Certain control components are available as “Optional“. When these optional components are installed with the water
heater, the control circuit wiring diagram accordingly will include these components. The optional equipment available
from the manufacturer includes the following:
-High Water Pressure Switch -Heating Element Time Delay Sequencers
-Low Water Pressure Switch -Electrical Door Lock
-Low Water Level Switch -Alarm Horn
6
6