Manitowoc b970 series, Technician'S Handbook

Page: 211 / 264

Part Number STH025 8/12 211
Remote Charging Procedures
1. Close the vacuum pump valve and the low side
manifold gauge valve.
2. 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).
3. If the high side does not take the entire charge,
close the high side on the manifold gauge set and
start the ice machine. Add the remaining
refrigerant through the low side (in vapor form)
until the machine is fully charged.
NOTE:
If an access valve core removal and
installation tool is used on any of the Schraeder
valves, reinstall the cores before disconnecting the
access tool and hose.
4. Remove the high side low loss fitting from the
access valve.
5. 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.
6. Allow the pressures to equalize while the ice
machine is in the freeze cycle.
7. Remove the low side hose from the access valve
and install the caps.