Water Regulating Valve

1.The condenser and fan blade are clean and have proper operating conditions.

2.Water supply to the product is correct and flow over the evaporator is correct.

3.Cuber refrigerant charge is correct.

4.TXV sensing bulb is properly located and secured to the suction line and correctly insulated.

5.Hot gas valve(s) are not leaking and/or seeping through.

Starving TXV - Product Symptoms

1.Suction pressure lower than normal for the operating conditions.

2.Ice production lower than normal and/or none.

3.Ice pattern on evaporator (if any) thin at top and thick at bottom.

Flooding TXV - Product Symptoms

1.Ice production lower than normal and/or none.

2.Suction pressure stabilizes at higher than normal pressure for operating conditions. Suction pressure does not modulate and may start to slowly rise.

3.Ice pattern will be very heavy at the bottom and thin at the top of the evaporator. Product may not enter harvest cycle because of higher than normal suction line temperature.

IMPORTANT: Frost on the suction line may be normal on medium temperature refrigeration equipment. Frost should be considered a red flag, long run times will normally produce some type of frost pattern. Before checking the sealed refrigeration system, the external conditions that could lead to frost follow:

1.Dirty condenser

2.Dirty condenser fan blade

3.Improper air clearance around Cuber

4.Loose TXV bulb mount

5.Poor water flow over evaporator

6.Ventilation problems

The expansion valves used on Cornelius “I”series ice equipment have special super heat settings and bulb charge designed from the product load and HP 62 refrigerant. Should the need arise to replace this or any re- frigerant components, be certain to use only components recommended by Cornelius for the model of the Cub- er being serviced. Use of nonapproved components will compound system difficulties and may void product warranty.

The water regulating valve is used on water-cooled cubers only. The valve is installed in the condenser outlet water line. It’s function is to control the proper operating head pressure by regulating the amount of water flow- ing through the condenser. The valve is adjustable and factory set to maintain condenser discharge water tem- perature @ 104/108_F. Setting the water regulating valve to maintain discharge water temperature eliminates the need to enter the sealed refrigeration system. When checking the valve, the water temperature should be taken as close to the condenser discharged as possible. The water temperature will equate to operating head pressure of approximately 225 PSI.

Should adjustment be required, the valve has an adjustment stem on the top of the valve. After allowing the cuber to operate for 10 minutes in the ice-- making mode to balance the system, turning the adjusting stem CW

will increase the discharge water temperature, and CCW		will decrease the discharge water temperature.
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322 specifications

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