Section 7 | Refrigeration System |
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Self-Contained Model Charging Procedures
Important
The charge is critical on all Manitowoc ice machines. Use a scale or a charging cylinder to ensure the proper charge is installed.
1. Be sure the toggle switch is in the OFF position.
MANIFOLD SET
CLOSEDOPEN
FRONTSEAT | BACKSEAT |
LOW SIDE | HIGH SIDE |
ACCESS | ACCESS |
VALVE | VALVE |
VACUUM
PUMP/
RECOVERY
UNIT
SCALE |
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| CLOSED | ||
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SV3055
Charging Connections
2.Close the vacuum pump valve, the low side service valve, and the low side manifold gauge valve.
3.Open the high side manifold gauge valve, and backseat the high side access valve.
4.Open the charging cylinder and add the proper refrigerant charge (shown on nameplate) through the discharge access 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 access valve (if necessary).
NOTE: Manifold gauges must be removed properly to ensure that no refrigerant contamination or loss occurs.
8.Make sure that all of the vapor in the charging hoses is drawn into the ice machine before disconnecting the charging hoses.
A.Run the ice machine in freeze cycle.
B.Remove the quick disconnect fitting from the high side access valve at the ice machine.
C.Open the low side service valve at the ice machine.
D.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.
E.Allow the pressures to equalize while the ice machine is in the freeze cycle.
F.Remove the quick disconnect fitting from the low side access valve at the ice machine and install both access valve caps.
Part No. | Revised 8/2003 |
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