Aquacal LTM0266 - Manual (Page 31)

Page 25
STEPS EXPLANATION
Configuring for Remote Flow Switch
It is assumed that a remote flow
switch has been connected to
the heat pump for automatic
thermostat switching.
See “Configuring for Remote Flow Switch” on page 35 for more information.
Enter Service Menu If needed, see “Entering Service Menu” in this chart.
Press the “Pool / Spa” button
until “FS2” is displayed.
This is the entrance point for the External Controller Interface.
Press the “Up” or “Down” button
to select “0” or “1”. Select “0” for no switch.
Select “1” to enable switch.
Wait 15 seconds to allow heat
pump to exit programming
mode.
Configuration is complete.
Calibrating Water Sensor
If it is believed the displayed temperature does not match the actual temperature, follow the steps below to verify and
adjust the controller as necessary. Be certain to use an accurate thermometer.
Obtain an accurate water
temperature reading.

With circulating pump in operation and water moving through heat pump,
place a reliable thermometer in water. Make sure to measure water away
from returns and determine the temperature of the water entering the heat
pump.

Once measured, compare the water temperature to heat pumps displayed
water temperature.

If temperature is within 1°F, no calibration is necessary.

If temperature differs by 2° to 3°F, calibration is necessary. Proceed to next
step.
Enter Service Menu If needed, see “Entering Service Menu” in this chart.
Press the “Pool / Spa” button
until “tSC” is displayed.
This is the entrance point for the water sensor calibration.
Press the “Up” or “Down” button
to match the measured water
temperature.

The controller can be adjusted to +/- 10°F from the displayed temperature.

Offset calibrations greater than 3°F should be avoided. Such large offsets
generally indicate problems with either 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.
Wait 15 seconds to allow heat
pump to exit programming
mode.
Calibration is complete.
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.

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.
Allow heat pump to remain OFF
for a minimum of 10 minutes.
Enter Service Menu If needed, see “Entering Service Menu” in this chart.
Press “Pool / Spa” button until
“dSC” is displayed.
This is the entrance point for the defrost sensor calibration.