17
The addition amount of the refrigerant can be calculated according to the
following formula:
The addition amount of the refrigerant (kg) = Control unit length was
added in an amount of refrigerant (kg / m) × the total length of the liquid
extension pipe (m)
3.9 kW/7.2 kW/12 kW extend the overall length was set (m) = Total
length of catheter -5m (m); Control unit length of the liquid refrigerant
amount is added, as shown in Table 4-1.
Table 4-1 The addition amount of different diameters per unit length of the liquid refrigerant
Liquid pipe diameter (mm)
Unit length the addition amount of
the refrigerant (kg/m)
9.52
0.060
12.7
0.112
16
0.181
19
0.261
22
0.362
28
0.618
4.2.
Add The Amount Of Lubricating Oil
When the union sufficiently long, the compressor discharge air along
with the lubricating oil adhered to the wall and the mixing amount of the
refrigerant in the oil return loop effect, we have added to the
refrigeration system lubricant, to ensure compressors normal, efficient
operation.
In general, even the tube length cannot be added within 30m lubricant.
Unit amount of the lubricant added is calculated by the following
formula:
The formula is:
L =
(R
−
M) × 0.4
0.9
× 1000
Wherein: L - amount of lubricating oil needs to be added (ml)
R - System adds the amount of refrigerant (kg)
M - Conditioning allowable maximum charge amount (kg)
