WATER HEATER CONSTRUCTION
WATER HEATER CONSTRUCTION
There are two types of commercial electric water heaters covered in this manual. See Figure 1 on page 8 and Figure 2 on page 9.
SURFACE MOUNT CONTROL MODELS
The first type of water heater covered in this manual is equipped with surface mount thermostat/ECO controls - Surface Mount Control Models. There will be separate thermostat/ECO (energy cut out) combination controls mounted to the surface of the storage tank directly above the heating elements they control. IE: a water heater equipped with 9 heating elements will have 9 combination thermostat/ECO controls. These combination thermostat/ECO controls sense temperature directly from the surface of the storage tank. Each combination control will have a temperature setting adjustment screw. As the tank (water) temperature rises and falls each individual thermostat will
ELECTRONIC CONTROL MODELS
The second type of water heater covered in this manual is equipped with an electronic control system - Electronic Control Models. The control system senses temperature electrically from an Immersion Temperature Probe. The probe is installed in a threaded opening in the storage tank (wet well) and senses water temperature directly. As the stored water temperature rises and falls the control system
HEATING ELEMENT CONFIGURATIONS
Both types of water heaters covered in this manual are factory equipped with either 3, 6 or 9 heating elements depending on how they were ordered from the factory - see the Heating Element Configurations table on page 21. Each group of 3 heating elements (physically installed in diagonal rows of 3) is referred to as a “Bank” of heating elements. Bank 1 is the lowest group of 3 heating elements, Bank 2 is the middle group of 3 heating elements and Bank 3 is the upper group of 3 heating elements. See Figure 1 on page 8 and Figure 2 on page 9.
Heating Element Voltage and KW Conversion Kits
Voltage and heating element KW conversion kits are available for the water heaters covered in this manual. Voltage and KW conversions are not covered in this manual. Voltage and KW conversion kits with instructions are available from local distributors and can be ordered from the manufacturer’s parts department by calling the toll free number listed on the back cover of this manual. Have the complete model and serial number along with the listed voltage and input KW from the rating label of the water heater on hand before calling.
Service Note: There are field conversion kits to increase/decrease KW input and change voltage. However, conversion kits do not allow adding heating elements to a water heater. Water heaters must remain as they were configured with 3, 6 or 9 heating elements from the factory. HEATING ELEMENTS CANNOT BE ADDED TO A WATER HEATER.
Servicing should only be performed by a Qualified Service Agent
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