! DANGER

SYSTEM MAINTENANCE

Tri-Sensor Assembly

The Tri-Sensor Assembly is used to measure water flow, salt level, and water temperature.

When the water flow reaches a minimum flow rate of 20 gpm (76 L/m), the flow paddle magnet closes a micro-switch that is monitored by the Control Unit.

Note: The use of high strength magnet devices in the close proximity of the Tri-Sensor can cause the flow switch to function incorrectly.

The Control Unit uses dedicated salt sensor blades to measure the level of salt in the water.

The Control Unit uses the temperature sensor to determine the temperature of the water. This is needed for the Patented Automatic Temperature Compensation feature that automatically adjusts the chlorine output for temperature variations. Less chlorine is needed in cold water, so the chlorine output is automatically reduced as the temperature drops to avoid excess chlorine production. Similarly, more chlorine is needed in warmer water and is automatically adjusted higher. The temperature sensor is also used for the Freeze Protection Feature as described on pg. 38.

Tri-Sensor Assembly

(#909-GO1.5) (Cable Ordered Separately)

Salt Sensor Blades

Flow Paddle

Temperature Sensor Post

Tri-Sensor O-Ring (#19028)

Directional Flow Indicator

View of locking

Quick-Connect head

Removing\Inspecting\Cleaning the Tri-Sensor (Pump must be off)

Turn off the pump power at the circuit breaker before servicing this unit. Personal injury or equipment damage could occur if the pump activates.

1.Disconnect the Tri-Sensor cable from the Tri-Sensor. (Place the end of the cable out of the way, where it will stay dry when the Tri-Sensor is removed.)

2.Cover the contact pins on the Tri-Sensor with the dust cap to prevent damage and to keep them dry and clean.

3.Remove the two (2) screws that retain the Tri-Sensor in the Tee joint on the Manifold.

4.Note the orientation of the Directional Flow Indicator. The Tri-Sensor must be installed in the same orientation when it is re-installed or replaced.

5.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.

Warning: The Tri-Sensor should not be pulled out at an angle, or the flow paddle or flow post will be damaged.

6.Inspect the following on the flow switch. Verify that the thin metalic paddle is straight and free from erosion. Verify the the long plastic post is straight and free of cracks. Do not twist or bend the paddle, or the long plastic post.

7.Inspect the two salt sensor blades. The two blades should not have any mineral deposits (scale) or other debris on them. If the blades need to be cleaned use the following method:

•Do not use any metallic objects to scrape the blade surfaces or you will remove or damage the blade sensor coating.

•To remove a calcium scale buildup, mix one (1) part Muriatic Acid into four (4) parts water. Mix the solution in a small container high enough to cover the cell blades.

! WARNING To avoid damaging splashes, always add acid to water, never water to acid.

•Immerse the salt blades in the solution for up to 15 minutes. An effervescing action indicates the calcium is being dissolved off of the blades.

•Rinse with fresh water and re-inspect. Repeat the acid treatment if necessary.

8.Check the tri-sensor assembly for any damage to the plastic housing and replace if needed.

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