Manitowoc EC18, Technician'S Handbook

Page: 92 / 184

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Charging Procedures
1. Be sure the toggle switch is in the OFF position.
2. Close the vacuum pump valve and the low side
manifold gauge valve.
3. Open the high side manifold gauge valve.
4. Open the refrigerant cylinder and add the proper
refrigerant charge (shown on nameplate) through
the discharge service valve.
5. Let the system “settle” for 2 to 3 minutes.
6. Place the toggle switch in the ICE position.
7. Close the high side on the manifold gauge set. Add
any remaining vapor charge through the suction
service valve (if necessary).
NOTE: Manifold gauges must be removed properly to
ensure that no refrigerant contamination or loss
occurs.
8. Make sure all vapor in the charging hoses is drawn
into the ice machine before disconnecting.
a. Run the ice machine in freeze cycle.
b. Disconnect the high side service valve at the ice
machine.
c. Open the high and low side valves on the
manifold gauge set. Any refrigerant in the lines
will be pulled into the low side of the system.
d. Allow the pressures to equalize while the ice
machine is in the freeze cycle.
e. Disconnect the low side service valve at the ice
machine.
9. Install the caps on the refrigeration access valves.
Important
The charge is critical on all Manitowoc ice machines.
Use a scale to ensure the proper charge is installed.