Replacing Pressure Controls Without; Removing Refrigerant Charge - Manitowoc indigo series Technician's Handbook

REPLACING PRESSURE CONTROLS WITHOUT

REMOVING REFRIGERANT 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 (air cooled only)
• Water regulating valve (water cooled only)
• High pressure cut-out control
• Low Pressure cut-out control
• High side service valve
• Low side service valve
This is a required in-warranty repair procedure.
1. Disconnect power to the ice machine.
2. Follow all manufacturer's 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.
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Important
Warning
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Part Number STH025 11/16