Replacing Pressure Controls Without; Removing Refrigerant Charge - Koolaire KY0275W Technician's Handbook

REPLAC
NG PRESSURE CONTROLS W
THOUT
REMOV
NG REFR
GERANT CHARGE
This procedure reduces repair time and cost. Use it when
any of the following components require replacement,
and the refrigeration system is operational and leak-free.
• Fan cycle control
• High pressure cut-out control
• High side access valve
• Low side access valve
This is a required in-warranty repair procedure.
1. Disconnect power to the ice machine.
2. Follow all manufacturers' instructions supplied
with the pinch-off tool. Position the pinch-off tool
around the tubing as far from the pressure control as
feasible. (See the figure on next page.) Clamp down
on the tubing until the pinch-off is complete.
Do not unsolder a defective component. Cut it out
of the system. Do not remove the pinch-off tool until
the new component is securely in place.
3. Cut the tubing of the defective component with a
small tubing cutter.
4. Solder the replacement component in place. Allow
the solder joint to cool.
5. Remove the pinch-off tool.
6. Re-round the tubing. Position the flattened tubing
in the proper hole in the pinch off tool. Tighten the
wing nuts until the block is tight and the tubing is
rounded.
NOTE: The pressure controls will operate normally once
the tubing is re-rounded. Tubing may not re-round 100%.
Part Number STH047 5/16



mportant
Warning
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