Testing The Flow Switch, Cleaning The Filter Screen,Cleaning The Bypass Valve; Servicing The Pool Pilot Cell - Aquacal DIG-220 Owner's Manual

Removing\Inspecting\Cleaning the Tri-sensor Continued (Pump must be off):
WARNING
1. Disconnect the Tri-sensor cable from the power center. (Place the end of the cable out of the way, where it will stay dry when the Tri-sensor is removed.)
Please note all cautions and warnings!
2. Remove the two (2) screws retaining the Tri-sensor in the Tee joint of the Manifold.
3. Note the orientation of the Directional of Flow Tab. The Tri-sensor must be installed in the same orientation when it is reinstalled or replaced.
4. The Tri-sensor can now be pulled out of the Tee. Firmly grip the Tri-Ssnsor 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 T ee joint.
5. Inspect the following on the flow switch: Verify the thin metallic paddle is straight and free from erosion; verify the long plastic post is straight and free of cracks. Do not twist
or bend the paddle or the plastic post. (see fig 30 on page-26 for illustration of Tri-sensor flow paddle.)
6. Inspect the two salt sensor blades. The 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 tall enough to cover the sensor
blades. Always add acid to water, never water to acid, see warnings above.
Immerse the salt sensor blades in the solution for up to 15-minutes. An effervescing action indicates the calcium is being dissolved from the blades.
Rinse with fresh water and reinspect. Repeat the acid treatment as necessary until all scale has been eliminated. Use care not to allow the pin connection to get
wet.
7. Check the Tri-sensor assembly for any damage to the plastic housing and replace if needed.
Testing the Flow Switch, Cleaning the Filter Screen,
Cleaning the Bypass Valve
The flow switch is a critical equipment protection device. When water flow has stopped, to prevent damage to the cell or system, it is important power to the Pool Pilot Cell be
automatically turned OFF. It is important to verify the proper operation of the Tri-sensor's water Flow Switch protection device.
NOTICE
The following procedure can be used to verify the proper operation of the flow switch, or to flush debris from the Bypass Valve.
1. Turn off circulator pump.
2. Slightly loosen the union nut just below the cell on the side of the manifold that does not contain the filter
screen.
3. Completely loosen the manifold union nut that contains the filter screen and pivot the manifold to gain
access to the filter screen.
4. Remove the screen. Clean the screen if dirty.
5. If the screen was dirty , then the system may need to be purged to remove excess debris. Leave the
manifold off and run the pump for a few seconds until clear.
6. Wrap the strainer screen securely with a small piece of plastic wrap (saran wrap, food wrap or zip lock
bag) as indicated in the diagram, place it back in the union.
7. Hand tighten the two unions that were loosened.
8. Turn on the pump and the DIG-220. The plastic will stop water flow to the flow switch, which is part
of the Tri-sensor that is located in the upper portion of the manifold. All water will be forced throu
the Bypass Valve. This action will normally flush out any small bits of debris trapped in the
Bypass Valve.)
9. The DIG-220 should detect a low water flow at the Tri-sensor, and activate the red Check System LE D.
The DIG-220 will also display the message "Purifier Off! Check Flow."
10. If the DIG-220 did not display this warning, then check the Tri-sensor cable connections and inspect the Tri-sensor as outlined in the previous section. If the warning message
still does not appear, then turn the DIG-220 off and contact the factory or your local dealer for assistance.
11. Turn the pump off.
12. Loosen the unions.
13. Remove the plastic wrap and replace the strainer screen. Hand tighten unions.
14. Resume normal operation.

Servicing the Pool Pilot Cell

The Pool Pilot Cell may require removal for periodic visual inspections, or for servicing when debris or calcium mineral deposits develop. The need to inspect and service the cell
is indicated by the following display messages: "Check System" light, and the message, "Check/Clean Cell", or "Purifier Off - Cable Flow".
The Pool Pilot Cell is installed with Unions on each end to allow quick and easy installation and removal.
1. Turn off pump and shut off all power.
2. Detach the cell cable from the Pool Pilot Cell
3. Unscrew the unions at both ends of the Pool Pilot Cell.
4. Slide the Pool Pilot Cell out of the Manifold Assembly.
28
MAINTENANCE
Failure to heed the following may result in permanent injury or death.
CHEMICAL HAZARD... To avoid damaging splashes, always add acid to water ,
never water to acid. Wear safety glasses and use other appropriate personal
protection equipment.
Failure to heed the following may result in equipment damage.
DO NOT operate system with a faulty flow switch
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Pool Pilot Cell and Unions– (
:
S S S T
TRAINER CREEN HOWN EMPORARILY
W P
RAPPED IN LASTIC
FIG-33
)
SIDE V I E W
FIG-34
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