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Section 7 Refrigeration System
Part No. 80-1214-3 7-17
Self-Contained Model Charging Procedures
1. Be sure the toggle switch is in the OFF position.
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.
Important
The charge is critical on all Manitowoc ice
machines. Use a scale or a charging cylinder to
ensure the proper charge is installed.
SV3055
FRONTSEAT BACKSEAT
OPEN
CLOSED
MANIFOLD SET
LOW SIDE
ACCESS
VALVE
HIGH SIDE
ACCESS
VALVE
SCALE
CLOSED
VACUUM
PUMP/
RECOVERY
UNIT
Revised 8/2003