Hayward Sense and Dispense Model: AQL-CHEM - Page 6

Installing ORP and pH probes to the Probe Cell - pool

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Drill and tap a 1/4" NPT hole using a 7/16" drill bit on the return side of the pool plumbing at a location just downstream of the filter, but upstream from the AQL-CL Electrolytic Cell. Use caution not to tap tapered threads too deeply. Using teflon plumber's tape, install a tubing connector into the hole. Run flex tubing from the tubing connector to the influent Probe Cell port. Push the flex tubing all the way into the pressure fitting to seat. Drill and tap another 1/4" NPT hole on the supply side of the pool plumbing. Use caution not to tap tapered threads too deeply. Using teflon plumber's tape, install the remaining tubing connector and run flex tubing to the effluent Probe Cell port. Push the flex tubing all the way into the pressure fitting to seat. Cut a 3" length of flex tubing and insert it into the sample stream port. This port can be used to draw water samples if needed. If flex tubing needs to be replaced, use only 3/8" UV-resistant cross-linked polyethylene tubing (PEX). Installing ORP and pH probes to the Probe Cell The ORP and pH probes are shipped "wet" in plastic storage caps. It's very important that the probes remain wet at all times. If the probes are allowed to dry out, they will fail and the AQL-CHEM will be ineffective. After installation, the Probe Cell will ensure that the probes are constantly exposed to pool water. During periods when the filter pump is off (even extended periods), there should be sufficient moisture remaining in the Probe Cell to ensure that the probes are protected. Remove the ORP and pH probes from their plastic storage caps and save the caps for future use. To ensure that the probes continue to remain wet, fill the Probe Cell with pool water before installing the probes. Apply a length of plumber's tape to the probe threads. Hand-tighten the probes only. At startup, check for leaks. If probe leaks, do not tighten more-instead remove and re-apply new Teflon tape. ORP Probe pH Probe apply teflon plumber's tape to threads 5

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Drill and tap a 1/4" NPT hole using a 7/16" drill bit on the return side of the pool
plumbing at a location just downstream of the filter, but upstream from the AQL-CL
Electrolytic Cell. Use caution not to tap tapered threads too deeply. Using teflon
plumber's tape, install a tubing connector into the hole. Run flex tubing from the
tubing connector to the influent Probe Cell port. Push the flex tubing all the way into
the pressure fitting to seat.
Drill and tap another 1/4" NPT hole on the supply side of the pool plumbing. Use
caution not to tap tapered threads too deeply. Using teflon plumber's tape, install the
remaining tubing connector and run flex tubing to the effluent Probe Cell port. Push
the flex tubing all the way into the pressure fitting to seat.
Cut a 3" length of flex tubing and insert it into the sample stream port. This port can be
used to draw water samples if needed.
If flex tubing needs to be replaced, use only 3/8” UV-resistant cross-linked polyethyl-
ene tubing (PEX).
Installing ORP and pH probes to the Probe Cell
The ORP and pH probes are shipped "wet" in plastic storage caps.
It's very important
that the probes remain wet at all times. If the probes are allowed to dry out, they will
fail and the AQL-CHEM will be ineffective. After installation, the Probe Cell will en-
sure that the probes are constantly exposed to pool water.
During periods when the
filter pump is off (even extended periods), there should be sufficient moisture remain-
ing in the Probe Cell to ensure that the probes are protected.
Remove the ORP and pH probes from their plastic storage caps and save the caps for
future use.
To ensure that the probes continue to remain wet, fill the Probe Cell with
pool water before installing the probes.
Apply a length of plumber's tape to the probe
threads.
Hand-tighten the probes only.
At startup, check for leaks.
If probe leaks, do
not tighten more—instead remove and re-apply new Teflon tape.
pH
Probe
ORP
Probe
apply teflon
plumber's tape
to threads