State Industries SSED 5 Temperature Regulation, High Temperature Limit Controls ECO

TEMPERATURE REGULATION

HIGH TEMPERATURE LIMIT CONTROLS (ECO) Temperature Adjustment

This water heater is equipped with an ECO (energy cut off) non adjustable high temperature limit control. An ECO is a normally closed switch that opens (activates) on a rise in temperature. If the ECO switch contacts open (activate) due to abnormally high water temperatures the control system will lock-out and disable further heating element operation. It is important that a qualified service agent be contacted to determine the reason for the ECO activation before resetting the ECO. Once the reason has been determined and corrected the ECO can be reset as follows:

The ECO high temperature limit switch is located inside the immersion temperature probe (two red wires). The ECO switch contacts will open when the water temperature reaches approximately 202°F/94°C and close at approximately 120°F/49°C. When the ECO switch contacts open (activate) the electronic control system locks out and displays a Fault message. Voltage to the contactor coils and heating elements is terminated to prevent further heating operation. Should the ECO activate, the water temperature must drop below 120°F/49°C before the control system can be reset. Once the water temperature has cooled below this point the power supply to the water heater must be turned off and on again to reset the control system.

The water heaters covered in this instruction manual are equipped with an electronic control system. The control system senses temperature from a factory installed immersion temperature probe – see the Features and Components illustrations at the beginning of this manual for location. The “Operating Set Point” is adjusted to control water temperature. This is an adjustable user setting in the control system’s “Temperatures Menu.” This and all control system menus are accessed through the UIM (User Interface Module - see Figure 2B) located on the front panel of the water heater.

The Operating Set Point is adjustable from 90°F/42°C to 190°F/88°C. The factory setting is 120°F/49°C. See the Control System Operation section of this manual for instructions on how to adjust the Operating Set Point and other user settings.

Set the Operating Set Point at the lowest setting which produces an acceptable hot water supply. This will always give the most energy efficient operation.

THERMOSTAT CONTROLS

The water heaters covered in this instruction manual are equipped with adjustable thermostat controls to control water temperature. Hot water temperatures required for automatic dishwasher and laundry use can cause scald burns resulting in serious personal injury and/ or death. The temperature at which injury occurs varies with the person’s age and duration of exposure. The slower response time of children, the elderly or disabled persons increases the hazards to them. Never allow small children to use a hot water tap or draw their own bath water. Never leave a child or disabled person unattended in a bathtub or shower. The water heater should be located in an area where the general public does not have access to set temperatures.

Setting the water heater temperatures at 120°f will reduce the risk of scalds. Some States require settings at specific lower temperatures.

Figure 2B shows the approximate time-to-burn relationship for normal adult skin.

	FIGURE 2A.
Water Temperature		Time to Produce 2nd & 3rd Degree
		Burns on Adult Skin
180°F (82°C)		Nearly Instantaneous
160°F (71°C)		About 1/2 second
150°F (66°C)		About 1-1/2 seconds
140°F (60°C)		Less than 5 seconds
130°F (54°C)		About 30 seconds
120°F (49°C)		More than 5 minutes
80°F (27°C)		- - - - - - - - - - - - - - - - -
	FIGURE 2B.

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