Attention
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■■
■ REFRIGERANT ADDITIONAL CHARGE
1. Piping installation by standard piping
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• At the time of shipment from the factory, this unit is charged with enough refrigerant for an equivalent pipe length of 10m.
(Refer to the following table)
But when the piping length exceeds 10m, additional charge is required according to the following table.
Example:
CU-C18BBP5
In case of 11m long pipe (one way), the amount of refrigerant to be replenished is: (11 - 10) x 20 = 20g
■ Cooling only type
Model Name Standard piping specification
Liquid piping (dia.mm) Gas piping (dia.mm) Gas charge-less length
(m)
Additional gas volume
(g/m)
CU-C18BBP5 6.35 12.7 10 20
■ Heat pump type
Model Name Standard piping specification
Liquid piping (dia.mm) Gas piping (dia.mm) Gas charge-less length
(m)
Additional gas volume
(g/m)
CU-A18BBP5 6.35 12.70 10 20
2. Piping installation by existing piping
The above models change the liquid pipe size of the previous series. It is to use the existing piping by adjusting the refrigerant
gas volume.
Please do correct piping installation referring to the above table.
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• •
• Please do not decrease the gas piping size. (It causes the breakdown of the compressor).
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• The equivalent piping length and the cooling and heating capacity change rate are same as the standard piping specification.
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