Cuno SQC Pro - Manual (Page 11)

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P. INSTALLATION TROUBLESHOOTING
Problem: Leak at the feedwater tapping valve.
Cause:
Tapping valve is not clamped tightly enough.
Solution: Tighten the tapping valve clamp screws evenly and
firmly keeping both halves of the bracket parallel. Be sure not
to deform tubing.
Problem: Leak at the drain saddle.
Cause:
Drain saddle not clamped tightly enough.
Solution: Tighten the drain saddle screws evenly and firmly.
Problem: Leak at the fittings threaded connection.
Cause:
Fitting is improperly taped or not
tightened sufficiently.
Solution: Retape the threaded portion with Teflon ® tape and
thread it in firmly. Do not over tighten.
Problem: Leak at the fittings push-in connection.
Cause:
Tubing is defective if there is a tubing misassembly.
Solution: Remove the tubing. Squarely cut off 1/4 inch from
the end of the tubing using a sharp razor knife and reinsert it
into the fitting. Make sure that the tubing is pushed in com-
pletely until it seats.
Problem: Leak at the filter cartridge head.
Cause:
Defective or misaligned O-ring.
Solution: Close the feedwater tapping valve and the storage
tank valve. Lift up on the faucet handle and drain the tank a
minimum of 5 minutes. Remove the filter cartridge and check
the condition of the O-rings. If they are misaligned, reseal
them. If they are damaged, replace them.
Problem: The faucet leaks from the spout with the handle
down.
Cause:
An obstructed or defective valve seat in the faucet
mechanism.
Solution: Remove the faucet spout with a twisting/lifting motion
and slide the faucet handle forward over the spout hole to gain
access to the faucet valve. Unscrew the tee-bar and the slotted
bushing to remove the valve. Clean out any obstruction or
replace it with a new valve mechanism if necessary.
Problem: No steady drip from the open faucet after the
tank is drained.
Causes:
• The feedwater tapping valve is not open.
• The feedwater tapping valve is not installed properly.
• A leak from any product water fitting connection.
• The icemaker valve was left open before the start-up
procedure completed.
• Air is still trapped in the system.
Solutions:
• Open the feedwater tapping valve completely.
• Check the feedwater tapping valve installation to
make sure that the needle has pierced the tubing.
• Correct the fitting leak as outlined above.
• Close the icemaker valve and wait until the faucet drips.
• Wait for the air to be purged from the system.
Problem: Water leaks from air gap module opening.
Causes:
• The drain line tubing is looped, kinked, or has a low spot.
• The drain line is blocked or the drain hole is not drilled
through completely.
• Air is locked in the air gap outlet.
• There is excessive RO reject flow.
Solutions:
• Trim any excess tubing to obtain a short, "straight-shot" to
the drain.
• Check to see that the drain line is clear of any obstruction
and remove the drain saddle fitting to verify that the hole is
drilled through completely.
• Blow air into the air gap outlet using a short length of tubing.
• Disconnect the red SFC reject tubing from the faucet air
gap inlet tubing and check the reject flow rate. It should
be less than 175 ml/min. If it is greater than 175 ml/min.,
replace the red SFC reject tubing with the new one of
proper length.
Problem: Too little or no reject flow.
Causes:
• Red SFC reject tubing is plugged or defective.
• The feedwater tapping valve is not open.
• An obstruction in the faucet air gap module.
Solutions:
• Replace the SFC reject tubing with one of proper length.
• Open the feedwater tapping valve completely.
• Remove the air gap module and inspect the internal flow
path. Replace the air gap module if necessary.
Problem: Chlorine or other unpleasant taste/odor is evi-
dent after the initial tank filling.
Cause:
Residual preservative/sanitizer is still in the water.
Solution: Drain and fill the storage tank several times if necessary.
Problem: Noise in the drain (gurgling or
dribbling sound).
Cause:
The reject water is dripping into the standing water in
the drain trap.
Solutions:
• Make sure that the 3/8" black drain tubing from the faucet
air gap module slopes continuously downward to the drain
saddle without any loops or low spots.
• Angle the drain piping so that the reject water runs down
the side of the drain pipe.
• Change the location of the drain saddle to the horizontal
drain pipe or any alternate vertical drain pipe which is
farther from the trap. Properly plug the original hole.
Caution: Make sure the drain saddle is always installed
above (before) the trap.