Viking VUAR140 Troubleshooting Guide download pdf (Page 71)

Component Description Test Procedures

From condenser refrigerant

flows into capillary and then

to evaporator before returning

to compressor through suction

line.

Drier Drier is placed at post Drier must be changed every time the system is opened for

condenser loop outlet and testing or compressor replacement.

passes liquefied refrigerant NOTE: Drier used in R12 sealed system is not inter-

to capillary. changeable with drier used in R134a sealed system.

Desiccant (20) 8x12 4AXH -

7 M>S> Grams. Before opening refrigeration system, recover HFC134a

refrigerant for safe disposal.

1. Score capillary tube close to drier and break.

2. Reform inlet tube to drier allowing enough space for

large tube cutter.

3. Cut circumference of drier 1 1/4" below condenser inlet

tube joint to drier.

4. Remove drier.

5. Apply heat trap paste on post condenser tubes to protect

grommets from high heat.

6. Unbraze remaining part of drier. Remove drier from

system.

7. Discard drier in safe place. Do not leave drier with

customer. If refrigerator is under warranty, old drier must

accompany warranty claim.

Evaporator Inner volume of evaporator Test for leaks in evaporator with electronic leak detector or

allows liquefied refrigerant with soap solution. Compressor oil is circulated with

discharged from capillary refrigerant, check for oil when checking for leaks.

to expand into refrigerant gas. NOTE: Follow all procedures for recovering R134a

refrigerant for safe disposal when opening system.

Expansion cools evaporator For Minute Leaks:

tube and fin temperature to

approximately -20 F

transferring heat from freezer

section to refrigerator. To avoid severe personal injury or death from eruption of high

pressure gases, observe the following.

Passing through suction line Protect against a sudden eruption if high pressures are

to compressor, the refrigerant required for leak checking.

picks up superheat (a relation- Do not use high pressure compressed gasses in

ship between pressure and refrigeration systems without a reliable pressure

temperature that assures regulator and pressure relief valve in the line

complete vaporization of

liquid refrigerant) as result of

capillary in suction line.

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Viking VUAR140 Troubleshooting Guide Page 71

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