Calibrating Defrost Sensor; Adjusting Dead-Band Differential - Aquacal AutoPilot WS03 Operation And Installation Manual

Page 30
STEPS

Calibrating Defrost Sensor

Follow steps below to verify and adjust defrost operation.
Press "MODE" Button until
operating mode shows "OFF".
Obtain an accurate temperature
reading at suction line.
Allow heat pump to remain OFF
for a minimum of 10 minutes.
Enter Service Menu
Press "Pool / Spa" button until
"dSC" is displayed.
Press "Up" or "Down" button
once to display the current
temperature value of the defrost
sensor.
Press "Up" or "Down" button to
match temperature reading
obtained by clamp-on device.
Wait 15 seconds to allow heat
pump to exit programming
mode.
Set system controls to desired
mode of operation.

Adjusting Dead-Band Differential

The dead-band differential determines the number of degrees the water temperature must rise or fall below the set
point before calling for heating or cooling. The installer should not adjust sensor calibration or dead-band values
unless instructed by an AquaCal AutoPilot Technician.
Enter Service Menu
Press "Pool / Spa" button until
"dBS" is displayed for Spa or
"dBP" is displayed for Pool.
Press "Up" button once to
display current setting.
Press "Up" or "Down" button to
adjust differential in 1-degree
increments.
Wait 15 seconds to allow heat
pump to exit programming
mode.
 Remove the heat pump front panel to gain access to the defrost sensor
location.
 Position a clamp-on, thermocouple-type temperature sensor onto the suction
line; position the clamp immediately adjacent to the defrost sensor.
 Connect the clamp-on thermocouple to a multi-meter designed to accept the
input of the clamp-on device.
If needed, see "Entering Service Menu" in this chart.
This is the entrance point for the defrost sensor calibration.
Compare displayed defrost sensor temperature on controller against reading
obtained by clamp-on device.
 If the defrost temperatures is within 1° F, no calibration is necessary.
 If the temperatures differ by 2° to 3° F, calibration is necessary, proceed to
next step.
 The controller can be adjusted to +/- 10° F from the displayed temperature.
Please note - offset calibrations greater than 3° F should be avoided. Such
large offsets generally indicate problems with the method of defrost
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.
Front panel can be re-attached. Calibration is complete.
If needed, see "Setting Operating Mode" on page 3.
If needed, see "Entering Service Menu" in this chart.
This is the entrance point for the Dead-band Differential adjustment menu.
The differential is adjustable in 1-degree increments from 1 to 5 degrees
Fahrenheit.
1 degree = .5 degree above or .5 degrees below water temperature.
2 degree = 1 degree above or 1 degree below water temperature.
3 degree = 1.5 degree above or 1.5 degrees below water temperature, etc.
Calibration is complete.
EXPLANATION