Service Training TT-011-0808 Fundamentals of refrigerant circuits.

Service Training

TT-011-0808

Fundamentals of refrigerant circuits

Service Training08.2008 • VSQ/TT • 2/14

Contents

Refrigerant circuit with expansion valve

Refrigerant circuit with restrictor

Refrigerant circuit with second evaporator

Components in refrigerant circuit

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Refrigerant circuit with expansion valve

System overview

F208_004

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Refrigerant circuit with restrictor

System overview

F208_007

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Refrigerant circuit with second evaporator

System overview

AB

C

D

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Components in refrigerant circuit

Condenser Condenser

F208_024

Radiator

Radiator fan

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Components in refrigerant circuit

From condenser Filter strainer

Dryer

To expansion valve

F208_025

Receiver with dryer

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Suction point for gaseous refrigerantPlastic cap

U-pipeFilter strainer

Dryer

From evaporator

Hole for refrigerant oil

To compressor

Reservoir with dryer

F208_037

Components in refrigerant circuit

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Thermostat with sensor lead

Diaphragm

To compressor Out of evaporator (low pressure)

Into evaporator(low pressure)

From condenser (high pressure)

Ball valve

Regulating spring

F208_015

Components in refrigerant circuit

Expansion valve with external diaphragm unit

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Out of evaporator (low pressure)

To compressor (low pressure)

Into evaporator (low pressure)

Ball valveRegulating spring

From condenser (high pressure)

Pressure compensation holes

Thermal head with special gas filling

Diaphragm

Plunger rod

Components in refrigerant circuit

Expansion valve with internal diaphragm unit

Video "Expansion valve"

F208_017

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To evaporator

Dirt strainer

O-ring, seals high pressure side against low pressure side.

Calibrated drillingStrainer for atomisation

Components in refrigerant circuit

Restrictor

Caution! Note installation position. Arrow on restrictor points to evaporator

F208_016

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Round pipe evaporator

Refrigerant return (gaseous)

Components in refrigerant circuit

Evaporator

F208_030

Refrigerant supply (gaseous)

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Pressure relief valve

Components in refrigerant circuit

Evaporator

F208_056

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Components in refrigerant circuit

Extraction and charge valves

Car valve insert installed. Use matching tool T10364 to loosen and tighten.

Caution! Always use O-rings with sealing caps.

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Thank you