Remote Charging Procedures - Manitowoc S300 Technician's Handbook

Remote Charging Procedures

1. Be sure the toggle switch is in the OFF position.
2. Close the vacuum pump valve, the low and high
side service valves (frontseat), and the low side
manifold gauge valve.
3. Open the refrigerant cylinder and add the proper
refrigerant charge (shown on nameplate) into the
system high side (receiver outlet valve and
discharge lines quick-connect fitting).
4. If the high side does not take the entire charge,
close the high side on the manifold gauge set,
and backseat (open) the low side service valve
and receiver outlet service valve. Start the ice
machine and add the remaining charge through
the low side (in vapor form) until the machine is
fully charged.
5. Ensure all vapor in charging hoses is drawn into
the machine, then disconnect the manifold
gauges.
Backseat the receiver outlet service valve
NOTE:
after charging is complete and before operating the ice
machine. If the access valve core removal and
installation tool is used on the discharge quick-connect
fitting, reinstall the Schraeder valve core before
disconnecting the access tool and hose.
6. Run the ice machine in freeze cycle.
7. Close the high side service valve at the ice
machine.
8. Open the low side service valve at the ice
machine.
9. 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.
10. Allow the pressures to equalize while the ice
machine is in the freeze cycle.
11. Close the low side service valve at the ice
machine.
12. Remove the hoses from the ice machine and
install the caps.
176 Part Number 80-1479-3 7/10