User Guide & Service Manual

USER GUIDE

Troubleshooting - Extended 5

u-line.com

SAFETY • INSTALLATION & INTEGRATION • OPERATING INSTRUCTIONS • MAINTENANCE • SERVICE

FROST FREE REFRIGERATION

Cooling Mode

• Bypass solenoid closed.

• Evaporator fan operating.

• Refrigerant flows through capillary tubes.

• Normal vapor/compression cycle refrigeration.

Defrost Mode

• Bypass solenoid valve open.

• Refrigerant flows through bypass system.

• Vapor flows from condenser to evaporator without a

phase change.

Figure 1. Frost Free Refrigeration System.

SOLENOID VALVE

CAPILLARY TUBE

VALVE IS CLOSED

FLOW WHEN SOLENOID

DRYER

CONDENSER

COMPRESSOR

EVAPORATOR

VALVE IS OPEN

FLOW WHEN SOLENOID

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