Removing / Inspecting / Cleaning Tri-Sensor; Tri-Sensor Assembly Overview; Inspect Tri-Sensor - Aquacal Pool Pilot Digital Nano Owner's Manual

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6.2 REMOVING / INSPECTING / CLEANING TRI-SENSOR

6.2.1 Tri-Sensor Assembly Overview

The Tri-Sensor Assembly is used to measure water flow, salt level, and water temperature.
Note: The use of high strength magnet devices in the close proximity of the Tri-Sensor can cause
the flow switch to function incorrectly.

When the water flow reaches a minimum flow
rate of 15 gpm (76 L/min), the flow paddle
magnet closes a micro-switch monitored by the
Nano/Nano + .
Digital
manifold requires a minimum flow of 25 gpm
(95 L/min).
 The Digital Nano/Nano + uses dedicated salt
sensor blades to measure the level of salt in
the water.

The Digital Nano/Nano + uses the temperature
sensor to determine water temperature. This
measurement is required for the Patented
Automatic Temperature Compensation feature
to automatically adjust chlorine output as water temperature varies. Less chlorine is needed in
cold water, so chlorine output is automatically reduced as water temperature drops (avoiding
excess chlorine production). Conversely, more chlorine is needed in warmer water, and
production is automatically adjusted higher as water temperatures increase.

Please note - the Tri-Sensor normally does not require maintenance or cleaning.
WARNING - Failure to heed the following may result in permanent injury or death.
CAUTION - Failure to heed the following may result in equipment damage.

6.2.2 Inspect Tri-Sensor

1) Disconnect the Tri-Sensor cable from the power center.
2) Remove the two (2) screws retaining the Tri-Sensor in the Tee joint of the Manifold.

Note the orientation of the Direction of Flow Tab. The Tri-Sensor must be installed in the
same orientation when it is reinstalled or replaced.
3) The Tri-Sensor can now be pulled out of the Tee.

Firmly grip the Tri-Sensor assembly (this is typically done with a large pair of channel lock
pliers).

Twist the Tri-Sensor back-and-forth while simultaneously pulling the Tri-Sensor straight out
of the Tee joint.
4) Check the Tri-Sensor assembly for any damage to the plastic housing and replace if needed.
5) Inspect the following on the flow switch: verify the thin metallic paddle is straight and free from
erosion; verify the plastic post is straight and free of cracks. Do not twist or bend the paddle or the
plastic post.
The CoPilot
CHEMICAL HAZARD - To avoid damaging splashes always add acid to water,
never water to acid. Wear appropriate personal safety protection including safety
glasses when using pool chemicals.
The Tri-Sensor should not be removed from manifold at an angle, or the flow
paddle and/or flow post may be damaged.
Ozone
Flow Paddle
Tri-Sensor Assembly
Salt Sensor Blades
Temperature
Sensor Post
Tri-Sensor
O-Ring
Indicator of
Flow Direction
Figure 1