Manual Carrier 07KD (page 18 of 48) (English, German, French, Italian, Spanish)

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Refrigerant line connection

(Flare connnections)

Collegamento linea refrigerante

(attacchi a cartella)

Refrigerant lines > 4 m:

Add refrigerant for each metre in excess of

this size according to the following table:

Refrigerant charge (g/m)

Diameter 1/4" 5/16" 3/8" 1/2" 5/8" 3/4"

mm 6,35 7,94 9,52 12,7 15,87 19,05

Liquid 15 25 40 75 120 180

Suction —— 614 2 334

After completing the above steps, remove

nut 2 and open the valve completely with

an ALLEN wrench. The valve is closed

before leaving the factory.

• Check that there are no refrigerant leaks.

IMPORTANT:

• The indications given above refer to

both the suction line and the liquid

line.

Linee di collegamento > 4 m:

Aggiungere fluido refrigerante per ogni

metro aggiuntivo di tubo in funzione delle

dimensioni riportate nella tabella seguente:

Carica refrigerante (gr/m)

Diametro 1/4" 5/16" 3/8" 1/2" 5/8" 3/4"

mm 6,35 7,94 9,52 12,7 15,87 19,05

Liquido 15 25 40 75 120 180

Aspirazione —— 614 2 334

Dopo aver effettuato le suddette operazioni

rimuovere il bocchettone 2 e aprire comple-

tamente la valvola con una chiave a

brugola. La valvola viene fornita chiusa.

• Controllare che non ci siano perdite di

refrigerante

IMPORTANTE:

• Le indicazioni di cui sopra si riferisco-

no sia alla linea di aspirazione che alla

linea del liquido.

Scelta delle linee frigorifere

Condizioni generali

Nel progettare le linee frigorifere si consiglia

di tenere sempre presente le seguenti

raccomandazioni:

• In base alla sistemazione dell’unità:

Linea di aspirazione (opzione A):

•È indispensabile un sifone alla base del

tratto verticale

• CONDIZIONE MAGGIORMENTE

SFAVOREVOLE: la velocità di aspirazio-

ne nel tratto verticale deve essere

superiore ai 6 m/s

Linea di aspirazione (opzione B):

• I sifoni intermedi non sono strettamente

necessari.

• CONDIZIONE MAGGIORMENTE

SFAVOREVOLE: La velocità di aspirazio-

ne nel tratto verticale deve essere

superiore ai 6 m/s.

Per entrambi le opzioni (A e B) si deve

ricordare quanto segue:

• La velocità massima permessa in ogni

linea è di 15 m/s.

• La linea di aspirazione deve essere isolata

e avere una pendenza del 2% verso il

compressore nel tratto orizzontale.

• Nei lunghi tratti potrebbe essere necessa-

rio regolare la carica d’olio.

• Il liquido dovrebbe essere sottoraffredda-

to a una temperatura di almeno 1°C

all’organo di laminazione.

Per questa

ragione, quando la linea di mandata è in

salita e superiore ai 15 m di lunghezza,

deve essere sottoraffreddata di 1°C per

ogni 3.5 m in eccesso.

ቢ Unità interna

ባ Unità esterna

ቤ Aspirazione

ብ Liquido

ባ

ቢ

ቤ

ባ

ቢ

ብ

Refrigerant line selection

General conditions

When designing the refrigerant lines, the

following must be kept in mind:

• Depending on the unit arrangement:

Suction line (option A):

• A trap is needed at the base of the

vertical stretch.

• MOST UNFAVOURABLE CONDITION

The suction speed in the vertical stretch

must be higher than 6 m/s.

Suction line (option B):

• The intermediate traps can be omitted.

• MOST UNFAVOURABLE CONDITION:

The suction speed in the vertical stretch

must be higher than 6 m/s.

For both option A and for option B you must

remember the following:

• The maximum speed permitted in any line

is 15 m/s.

• The suction line must be insulated and

have a 2% slope towards the compressor

in the horizontal stretch.

• In long lengths it could be necessary to

adjust the oil charge.

• The liquid should be subcooled by at

least 1 K at the restrictor inlet. If the liquid

line is ariser and longer than 15 m, it must

be subcooled 1 K for each 3.5 m in

excess.

ቢ Indoor unit

ባ Outdoor unit

ቤ Suction

ብ Liquid

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Carrier 07KD Manual

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