Aquacal 100 Controls Configuration & Adjustments, Level-2Microprocessor Programming...continued

Controls Configuration & Adjustments...

Level-2 Microprocessor Programming...continued:

4. Water Sensor Calibration...continued:

C. Follow the steps 1a. through 1d. above to enter the service menu. Once [dEL] is displayed, press the [POOL/SPA] key until the display shows [tSC] (Water Temperature Calibration). Using either the [UP] or [DOWN] arrow keys, calibrate the water temperature sensor by increasing or decreasing the numeric value displayed to match the water temperature reading measured on your thermometer. The controller can be adjusted to +10oF to –10oF from the nominal displayed temperature. However, offset calibrations greater than 3oF should be avoided… Such large offsets generally indicated problems with the method of water temperature measurement, a water sensor not properly inserted into the well, or other equipment issues. Do NOT attempt to mask such issues through offset calibration.

D. Once the corrected temperature is displayed, Not pressing depressing any buttons for 15 seconds will allow the controller to save the selection and return to the normal operating mode. Pressing the {POOL/SPA] key will also save the selection and step to the next menu parameter [dSC], (Defrost Sensor Calibration).

5. Defrost Sensor Calibration [dSC]:

In the event the defrost Sensor requires calibration, the following steps must be followed closely to ensure optimal defrost control.

A. Turn the heater off at the main circuit panel.

B. Remove the unit’s front panel to gain access to the defrost sensor. The defrost sensor will be found strapped to the suction line in combination with the TXV bulb on heat only models, or on the evaporator’s suction heater independent from the TXV bulb for heat and cool models.

C. Carefully remove the insulation from around the sensor area.

D. Using a highly accurate, surface-mount thermometer, attach the thermometer probe to the

suction line immediately adjacent to the Defrost Sensor. After the thermometer probe is securely attached to the suction line, reinstall the insulation foam around the sensor.

E. With the foam insulation and the front reinstalled, restart the unit, allowing it to run for 10- minutes… The suction line temperature should have stabilized at this point… Note the suction line temperature as measured by the thermometer probe.

F. Follow previous steps “1a.” through “1d.,” to enter the service menu. Once [dEL] is displayed, press the [POOL/SPA] key until the display shows [dSC] (Defrost Sensor Calibration). With the service menu parameter [dSC] displayed pressing either the [UP] or [DOWN] arrow key once will display the current temperature value of the defrost sensor.

G. Compare the controller’s displayed defrost sensor temperature with the reading on the thermometer. If the temperatures are the same or within 1oF, no calibration is necessary. If the temperatures differ by 2 to 3oF, calibration is necessary. The controller can be adjusted to +10oF to –10oF from the nominal displayed temperature. However, offset calibrations greater than 3oF should be avoided… Such large offsets generally indicated problems with the method of suction line temperature measurement, a defrost sensor not properly attached to the suction line, or other equipment issues. Do NOT attempt to mask such

issues through offset calibration.

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