Koolaire KY0275W Technician's Handbook page 110

SELF-CONTAINED RECOVERY/EVACUATION
1. Place the toggle switch in the OFF position.
2. Install manifold gauges, charging cylinder/scale, and
recovery unit or two-stage vacuum pump.
3. Open (backseat) the high and low side ice machine
service valves, and open high and low side on
manifold gauges.
4. Perform recovery or evacuation:
A. Recovery: Operate the recovery unit as directed
by the manufacturer's instructions.
B. Evacuation prior to recharging: Pull the system
down to 500 microns. Then, allow the pump
to run for an additional half hour. Turn off the
pump and perform a standing vacuum leak
check.
NOTE: Check for leaks using a halide or electronic leak
detector after charging the ice machine.
Follow the Charging Procedures below.
CHARGING PROCEDURES
The charge is critical on all Koolaire 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.
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 service valve.
4. Open the charging cylinder and add the proper
refrigerant charge (shown on nameplate) through
the discharge service valve.
5. Let the system "settle" for 2 to 3 minutes.
6. Place the toggle switch in the ICE position.
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mportant
Part Number STH047 5/16