Manual Carrier 07KD (page 40 of 48) (English, German, French, Italian, Spanish)

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A motor burnout is recognized by the burnt

odour of the refrigerant system. When the

motor of a compressor burns out, the

insulation of the stator winding forms

carbon, water and acid. After burnout, clean

the refrigerant circuit before installing a new

compressor. Remove and inspect the

restrictor, discard it if contaminated.

The system may be partially cleaned with a

solvent, convenient to circuit cleaning,

compatible with the refrigerant and local

codes. This can be introduced into the

suction line and flushed out of the

discharge line before connecting the new

compressor. The refrigerant used must be

recovered in an appropriate storage tank.

However the operating method of clean-up

with a suction line filter drier is

recommended:

• Replace the compressor motor.

• Remove and clean or replace the

restrictor.

• Install a new oversized liquid line filter

drier.

• Also install a suction line filter drier.

Provisions should be made to measure

the pressure drop across the suction line

filter drier once system is in operation.

• After leak testing, evacuate and create a

vacuum to at least 5 mm in the system.

• Recharge the system with the correct

refrigerant and compensate the charge

for the volume of the liquid line filter drier.

Refer to the manufacturer’s instructions.

• Start up the system, check or correct the

charge if necessary.

• Allow system to run about 48 hours.

Re-check the pressure drop across the

suction line filter drier. Replace it, if the

pressure drop exceeds 0,2 bar (3 psi).

If possible check a sample of oil. If the

pH-value is below 5 the two filter driers

should be replaced (liquid line and

suction line). If it is between 5 to 7 the

system can be considered to be properly

cleaned up and in good running order.

Refrigerant system

cleaning

Un motore bruciato è riconoscibile dall’odo-

re di bruciato che proviene dal sistema

refrigerante. Quando il motore di un

compressore brucia, l’isolamento

dell’avvolgimento dello statore forma

carbone, acqua e acido. I residui devono

essere puliti su tutto il percorso del circuito

frigorifero prima dell’installazione del nuovo

compressore. Smontare e pulire l’organo di

laminazione, sostituire se sporco. Il sistema

può essere parzialmente pulito con un

solvente adeguato alla pulizia del circuito,

compatibile con il refrigerante e le norme

vigenti. Questo può essere introdotto nella

linea di aspirazione ed eliminato dalla linea

di mandata prima del montaggio del nuovo

compressore. Il refrigerante utilizzato deve

essere sistemato in un’appropriata tanica.

Tuttavia, il metodo consigliato di pulizia con

un filtro disidratatore della linea di aspira-

zione, è il seguente:

• Togliere il motore del compressore

• Togliere e pulire, o sostituire, l’organo di

laminazione

• Installare un nuovo filtro deidratatore

della linea del liquido sovradimensionato

• Inserire anche un filtro sulla linea di

aspirazione. Prevedere di quanto sarà la

perdita di carico nel filtro deidratatore

della linea di aspirazione quando il

sistema è in funzione.

• Dopo aver effettuato una prova di tenuta,

svuotare il sistema e fare il vuoto per

almeno 5 minuti.

• Ricaricare il sistema con R22 in quantità

adeguata.

• Avviare il sistema, controllare e corregge-

re, se necessario.

• Lasciare il sistema in funzione per 48 ore.

Ricontrollare la perdita di carico nel filtro

deidratatore nella linea di aspirazione.

Sostituire se la perdita di pressione

supera 0.2 bar (3 psi). Se possibile,

controllare un campione di olio. Se il pH è

inferiore a 5, sostituire i due filtri

deidratatori (linea di aspirazione e linea di

mandata). Se il pH è tra 5 e 7 il sistema è

stato pulito in modo proprio ed è in

corretto funzionamento.

Pulizia del

sistema refrigerante

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Carrier 07KD Manual

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