Manual Carrier 38MHJ (page 36 of 44) (English, German, French, Italian, Spanish)

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Before start-up Prima dell’avviamento

Refrigerant charge

Gas tightness testing and dehydration

38MHJ and 38MC units are shipped fully

charged with refrigerant 22 ready for

operation. If, when the unit is run,

symptoms of loss of charge (for example,

abnormally low cooling capacities) are

detected conduct a leak test followed, if

necessary, by a gas tightness test using

compressed nitrogen. For the latter all

refrigerant must be removed from the

circuit. Transfer the refrigerant to a storage

tank and then rinse circuit.

WARNING:

If any brazing is to be done the

refrigerant circuit must be filled with

nitrogen. Combustion of refrigerant

produces toxis phosgene gas.

Prova per la tenuta stagna del gas e

deidratazione

Le unità 38MHJ e 38MC sono fornite con

refrigerante 22 pronte per il funzionamento.

Se, mentre l’unità sta funzionando, si

evidenziano sintomi di perdita di carica (per

esempio un abbassamento nelle capacità di

raffrescamento), eseguire un test di

controllo usando una bombola di azoto. Per

questo tutto il refrigerante deve essere

rimosso dal circuito. Trasferire il refrigeran-

te in un recipiente di stoccaggio e evacuare

il circuito.

ATTENZIONE:

Se è necessario saldare qualche parte il

circuito refrigerante deve essere riempi-

to con azoto. La combustione del

refrigerante produce gas tossico

fosgene.

Carica refrigerante

Points to check prior to start-up

Do not attempt to start-up the units, even

momentarily, until the following steps have

been completed.

• All electrical and refrigerant connections

must be properly completed.

• Check the adjustment of all electrical

connections.

• Ensure that there are no refrigerant leaks.

• Check that the power supply coincides

with that stated on the nameplates.

• Check that the fan rotates properly.

• All the panels should be fitted and firmly

secured with the corresponding screws.

The unit should be started up under the

supervision of a qualified refrigeration

engineer.

VERY IMPORTANT:

• Never use the compressor as a

vacuum pump.

• If more refrigerant is needed, add gas

very slowly via the suction line. Liquid

must never be introduced in the

suction line.

• Never overcharge with refrigerant.

Punti da controllare prima dell’avvia-

mento

Non avviare le unità, anche per un istante,

prima di aver svolto le seguenti operazioni:

• Devono essere completate tutte le

operazioni di connessioni elettriche e

frigoriferei

• Controllare la sistemezione delle connes-

sioni elettriche

• Assicurarsi che non ci siano perdite di

refrigerante

• Controllare che la tensione fornita sia la

stessa riportate sulla targhetta

• Controllare che la ventola possa girare

liberamente

• Tutti i pannelli devono essere fissati

saldamente con le loro viti

L’unità deve essere avviata sotto la

supervisione di un tecnico specializzato

nella climatizzazione dell’aria.

IMPORTANTISSIMO:

• Non usare mai il compressore come

una pompa del vuoto

• Se è necessario più refrigerante,

aggiungere gas molto lentamente

attraverso la linea di aspirazione. Non

si deve mai introdurre liquido nella

linea di aspirazione

• Non introdurre mai quantità eccessive

di refrigerante

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Carrier 38MHJ Manual

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