Owner's Manual

ii. Low water detection – sets the low water detection on or off.

1. LOn, for low water on. (Factory Default)

2. LOF, for low water off.

iii. Low water reset – sets the low water reset for either automatic or manual

1. LAU, for low water automatic reset. (Factory Default)

2. LAn, for low water manual reset.

iv. Temperature units – sets the temperature units to either degrees

Fahrenheit or Celsius.

1. DEF, for degrees Fahrenheit. (Factory Default)

2. DEC, for degrees Celsius.

v. Differential – sets the number of degrees below setpoint that the heater

will resume heating after it has achieved setpoint.

1. d ##, where ## is the differential in degrees (1 to 20). (Factory set

at 02)

vi. Display – sets the display to either setpoint or actual temperature.

1. dSS, for display setpoint temperature. (Factory Default)

2. dSt, for display actual temperature.

vii. Heater Interlock – sets the heater interlock mode to on or off. (Only

available with r23 or later software).

1. HoF, to disable the 24-volt interlock feature. (Factory Default)

2. Hon, to enable the 24-volt interlock feature.

viii. XB1 Temperature Setpoint – sets the setpoint for the operation of the

XB1 relay operation.

e. To leave the configuration menu, wait 5 seconds without pushing any buttons or

press the UP and DOWN buttons simultaneously.

5. To reset any high-limit, no probe, or low water (when in manual reset mode) fault

condition, press the RESET button.

6. Display

a. By default the display will show the setpoint of the booster heater.

b. The decimal points on the display, as shown below, indicate that the controller

is calling for a contactor to pull in. If three or more contactors are installed, the

third decimal point is used for all remaining contactors.

ANNUAL INSPECTION

1. Monitor water temperature

a. Let water heater completely heat to a designated temperature setting.

b. After controller satisfies (that is, when the magnetic contactor actually clicks

off), draw water from as close as possible heater outlet and measure the

temperature.

c. Compare the water temperature of outlet water to the temperature setting of

the display when it satisfies. Normal variation between the two points is

approximately + 5°F.