Pagina 37
Nota privind adaugarea agentului frigorific
Unele sisteme necesita incarcare suplimentara in functie de lungimile tevii. Lungimea standard a tevii
variaza in conformitate cu reglementarile locale. De exemplu, in America de Nord, lungimea standard
a tevii este de 7,5 m (25 ‘). In alte zone, lungimea standard a tevii este de 5m (16 ‘). Agentul frigorific
trebuie incarcat de la orificiul de service de pe supapa de joasa presiune a unitatii exterioare. Agentul
frigorific suplimentar care trebuie incarcat poate fi calculat folosind urmatoarea formula:
REFRIGERANT SUPLIMENTAR IN FUNCTIE DE LUNGIMEA TRASEULUI FRIGORIFIC
Pentru unitatea frigorifica R290, cantitatea totala de agent frigorific care trebuie incarcata nu este mai
mare de: 387g (<= 9000Btu / h), 447g (> 9000Btu / h si <= 12000Btu / h), 547g (> 12000Btu / h si <=
18000Btu / h), 632g (> 18000Btu / h si <= 24000Btu / h).
PRUDENTA: NU amestecati tipurile de agent frigorific.
Page 35
Note on Adding Refrigerant
Some systems require additional charging depending on pipe lengths. The standard pipe length varies
according to local regulations. For example, in North America, the standard pipe length is 7.5m (25’).
In other areas, the standard pipe length is 5m (16‘). The refrigerant should be charged from the service
port
on the outdoor unit’s low pressure valve.
The additional refrigerant to be charged can be
calculated using the following formula:
CAUTION
DO NOT mix refrigerant types.
For R290 refrigerant unit, the total amount of refrigerant to be charged is no more than:
387g(<=9000Btu/h), 447g(>9000Btu/h and <=12000Btu/h), 547g(>12000Btu/h and <=18000Btu/h),
632g(>18000Btu/h and <=24000Btu/h).
ADDITIONAL REFRIGERANT PER PIPE LENGTH
Connective Pipe
Length (m)
Air Purging
Method
Additional Refrigerant
< Standard pipe length Vacuum Pump N/A
> Standard pipe
length
Vacuum Pump
Liquid Side: Ø 6.35 (ø 0.25”)
R32:
(Pipe length – standard length) x 12g/m
(Pipe length – standard length) x 0.13oZ/ft
R290:
R290:
(Pipe length – standard length) x 10g/m
(Pipe length – standard length) x 0.10oZ/ft
Liquid Side: Ø 9.52 (ø 0.375”)
R32:
(Pipe length – standard length) x 24g/m
(Pipe length – standard length) x 0.26oZ/ft
(Pipe length – standard length) x 18g/m
(Pipe length – standard length) x 0.19oZ/ft
R410A:
R410A:
(Pipe length – standard length) x 15g/m
(Pipe length – standard length) x 0.16oZ/ft
(Pipe length – standard length) x 30g/m
(Pipe length – standard length) x 0.32oZ/ft
R22:
(Pipe length – standard length) x 20g/m
(Pipe length – standard length) x 0.21oZ/ft
R22:
(Pipe length – standard length) x 40g/m
(Pipe length – standard length) x 0.42oZ/ft
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