Welbilt Koolaire KD0270A, Technician'S Handbook, Page: 117 / 136

Part Number STH047 Rev01 10/18 117
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
• High pressure cut-out control
• High side access valve
• Low side access valve
Importar
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.
n
Warning
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%.