Cornelius 2000 - Series Manual de instalación descargar pdf (Pagina 18)

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Use general refrigeration system practices when replacing and recharging unit. After new valve is in place, go

through previous monitored adjustments and troubleshooting to be sure valve is functioning properly.

NOTE: On water cooled units adjust condenser modulating valve before troubleshooting expansion

valve.

CAUTION: Very high discharge pressure is present in system. Quick disconnects on your

gages will minimize Danger and loss of refrigerant. Comply with federal regulations for

reclaiming refrigerant.

CONDENSER MODULATING VALVE

The reason for using a water modulating valve is to supply the correct amount of water to the condenser to

maintain the proper operating pressure in the refrigeration system high side. The flow of water through the valve

is increased as the high side pressure rises and decreases as high side pressure lowers.

To calibrate the amount of water flow with the refrigeration system high side pressure, turn adjustment screw

located on end of valve opposite of bellows See Figure 4. Turn screw counterclockwise to raise opening point.

Opening point of valve should be set to maintain proper operating pressure in refrigeration system high side.

Refer to Pressure Chart on Page 11. Closing point of valve should be set low enough to close valve during com-

pressor stand by periods.

NOTE: Cold water will absorb more heat faster than warm water. The water flow will therefore

automatically increase as inlet temperature increases.

FIGURE 6. ADJUSTMENT SCREW

CONDENSER MODULATING VALVE REMOVAL

1. Disconnect power to unit, then shut off water supply to condenser and reclaim refrigerant from system.

2. Remove inlet water line from Condenser modulating Valve. Also remove tube from refrigerant high side line.

3. Remove Condenser Modulating Valve and bracket.

4. Remove valve from bracket.

5. Replace Condenser Modulating Valve by reversing Steps 2 thru 4. Then pull system into vacuum.

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Cornelius 2000 - Series Manual de instalación Pagina 18