Envicool XRow Series - Page 36

Shenzhen Envicool Technology Co., Ltd.
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The type of refrigerating oil varies from compressor to compressor, please consult the
equipment company for details, and replenishing refrigerating oil requires a dedicated
oil pump for pressure. At the site, the negative pressure in the unit can be used to
replenish the refrigerating oil through the pressure gauge before the unit is charged with
refrigerant and after a certain vacuum. Therefore, it is necessary to estimate the amount
of refrigerant added.
The calculation of the amount of refrigerant added is based on the following formula:
Addition amount of refrigerant (kg) = Addition amount of refrigerant per unit
length of liquid pipe (kg/m) × total length of extension liquid pipe (m)
Extend the total length of the liquid pipe (m) = the total length of the liquid pipe
(m)-S (m)
Among them, S means that the air conditioner is filled with lubricating oil to meet the
distance of the long connecting pipe. "The amount of refrigerant added per unit length
of the liquid pipe" is shown in Table 2-16.
Table 2-16 Adding volume of the refrigerant in unit length of liquid pipe for liquid pipes of different
outer diameters
Liquid pipe outer
diameter (mm)
Adding volume of the refrigerant
in unit length of liquid pipe
(kg/m)
12.7
0.102
15.88
0.156
19.0
0.246
22.0
0.326
Note:At present, the units shipped out of the factory are pre-filled with some lubricating
oil to meet the requirements of 50m long piping. If the on-site pipeline exceeds 50m,
additional lubricating oil is required. It can be calculated according to the
above-referenced formula.