1/12
54
Charging Procedures
The charge is critical on all Multiplex Blended Ice
Machine. Use a scale to ensure the proper charge is
installed. A quick disconnect is required for the high side
connection.
1. Be sure the rocker 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. Close the high side on the manifold gauge set. Add
any remaining vapor charge through the suction
access fi tting (if necessary).
6. Let the system “settle” for 2 to 3 minutes.
7. Place the rocker switch in the ICE position.
NOTE: Manifold gauges must be removed properly to
ensure that no refrigerant contamination or loss occurs.
1. Make sure that all of the vapor in the charging
hoses is drawn into the Blended Ice Machine before
disconnecting the charging hoses.
• Run the Blended Ice Machine in the freeze cycle.
• Verify the refrigerant cylinder valve is closed.
• 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.
• Allow the pressures to equalize while the Blended
Ice Machine is in the freeze cycle.
• Close the high and low side manifold gauge set.
• Remove the hoses from the Blended Ice Machine
and install the caps.
System Contamination Cleanup
General
This section describes the basic requirements for
restoring contaminated systems to reliable service.
Important
Multiplex assumes no responsibility for the use of
contaminated refrigerant. Damage resulting from
the use of contaminated refrigerant is the sole
responsibility of the servicing company.
DETERMINING SEVERITY OF CONTAMINATION
System contamination is generally caused by either
moisture or residue from compressor burnout entering
the refrigeration system.
Inspection of the refrigerant usually provides the fi rst
indication of system contamination. Obvious moisture or
an acrid odor in the refrigerant indicates contamination.
If either condition is found, or if contamination is
suspected, use a Total Test Kit from Totaline or a similar
diagnostic tool. These devices sample refrigerant,
eliminating the need to take an oil sample. Follow the
manufacturer’s directions.
If a refrigerant test kit indicates harmful levels of
contamination, or if a test kit is not available, inspect the
compressor oil.
1. Remove the refrigerant charge from the Blended Ice
Machine.
2. Remove the compressor from the system.
3. Check the odor and appearance of the oil.
4. Inspect open suction and discharge lines at the
compressor for burnout deposits.
5. If no signs of contamination are present, perform
an acid oil test to determine the type of cleanup
required.
Refrigerant Recovery/Evacuation & Charging Procedures
Summary of Contents for Multiplex Ms-8
Page 59: ...1 12 59 Blender Scale Schematic Shaver Schematic ...
Page 62: ...62 1 12 Notes ...
Page 63: ...1 12 63 Notes ...