State Industries SUF-100-250 Tank Temperature, 120F, Operating Set Point, Heater Status, Menu

User Settings & Control System Menus

Temperatures Menu

Operating Set Point And Differential Adjustment

The Operating Set Point is adjustable from 90°F (42°C) to 180°F (82°C). The factory setting is 120°F (49°C). The Differential is adjustable from 2° to 20°. The factory setting is 8°. These user settings are accessed from the Temperatures menu. The following instructions will explain how to adjust these settings and navigate the control system menus.

When the water temperature sensed by the control system from the two (upper and lower) Temperature Probes reaches the Operating Set Point the control system will end the heating cycle. A heating cycle will be activated again when the sensed water temperature drops below the Operating Set Point minus the Differential setting.

Note: Lower Differential settings may cause excessive heating cycles (short-cycling) which can cause premature failure of components such as the Hot Surface Igniter. Set the Differential at the highest setting which produces an acceptable hot water supply. Set the Operating Set Point to the lowest setting which produces an acceptable hot water supply for most efficient use.

Description/Action	Display
From the Desktop screen, press the Operational Button under
	MANUFACTURER / MODEL INFORMATION
MENU. The "Main Menu" screen will be displayed.
	Tank Temperature	120°F
	Operating Set Point	120°F
	Status: Standby

		MENU			HELP
The Main Menu is where all control system menus are listed,
			Main Menu
see Table 13 on page 46 for a complete list and description of
control system menus. Use the Up and Down Buttons to view	Temperatures
all control system menus from the Main Menu.
	Heater Status
With Temperatures menu selected (highlighted in black) in	Display Settings
the Main Menu screen, press the Operational Button under	Heater Information
“SELECT” to enter the Temperatures menu.
If the Temperatures menu is not selected use the Up and Down	Current Fault
Buttons to select this menu item.
		SELECT		BACK	HELP

With the Operating Set Point selected in the Temperatures	Temperatures
menu, press the Operational Button underneath “CHANGE” to
	Operating Set Point		120°F
activate the adjustment mode for this menu item.
If Operating Set Point is not selected use the Up and Down	Differential		8°F
	Tank Temperature		120°F
Buttons to select this menu item.	Upper Temperature		122°F
Note: Higher Temperature settings increase wear and	Lower Temperature		118°F
	(Heater Regulated to Tank)
operating costs. Set the Operating Set Point to the lowest
	Upper Probe Offset		0°F
setting which produces an acceptable hot water supply. This
will always provide the most energy efficient operation and	CHANGE	BACK	HELP
longer life.
With the adjustment mode for the Operating Set Point activated	Temperatures
the selection bar will change from a black fill to a black outline.
	Operating Set Point		140°F
Use the Up and Down Buttons to change the current setting.
	Differential		8°F
Press the Operational Button under "UPDATE" to save the	Tank Temperature		120°F
	Upper Temperature		122°F
new setting. Press the Operational Button under "CANCEL" to
	Lower Temperature		118°F
discard changes and return to the previously saved setting.
	(Heater Regulated to Tank)
Note: Use this same procedure to change the Differential	Upper Probe Offset		0°F
setting and other adjustable user settings in the control system	UPDATE		CANCEL
menus.

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