Hoshizaki KML-600MAH Instruction Manual page 23

[2] Remove the water from the potable water supply line:
1) Turn off the power supply and remove the Front Panel.
2) Move the Control Switch, on the Control Box, to the "OFF" position.
3) Wait 3 minutes.
4) Close the Potable Water Supply Line Shut-off Valve and open the Potable Water Supply
Line Drain Valve. See Fig. 9.
5) Allow the line to drain by gravity.
6) Attach compressed air or carbon dioxide supply to the Potable Water Line Drain Valve.
7) Move the Control Switch to the "ICE" position.
8) Replace Front Panel and turn on the power supply.
9) Blow the potable water line out using compressed air or carbon dioxide.
[3] Drain the Potable Water Tank:
1) Turn off the power supply.
2) Remove the Front Panel.
3) Move the Control Switch to "SERVICE" and move the Service Switch to the "DRAIN"
position.
4) Replace the Front Panel and turn on the power supply for 2 minutes.
5) Turn off the power supply.
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