Panasonic 2WAY-Multi U-10MES2E8 Bedienungsanleitung Seite 22

3-5. Compressor oil charge
• Add compressor oil (FV68S) when vacuuming.
• Insert compressor oil (FV68S) from the gas tube side that was mounted for vacuuming, and perform
vacuuming from the liquid tube side.
• After adding the specified amount of oil, close the valve on the gas tube side, and continue vacuuming.
Table 5
Type
U-10MES2E8 (28.0 kW)
U-20GES3E5 (56.0 kW)
• Perform before turning on the power of the indoor and outdoor units.
The expansion valve of the indoor unit will be closed.
• If the power is already turned on, perform Test Run Settings "V open" (
before adding the compressor oil.
3-6. Refrigerant charge
Calculation of amount of additional refrigerant charge
• Table 7 shows the refrigerant charge at factory shipping time. Additional refrigerant must be added
according to the size and length of the tubing. If a water heat exchanger unit is installed, provide an
additional refrigerant charge for the connecting line portion. (Use the values in Table 6 to calculate liquid
tube size and length.)
Table 6 Quantity of additional refrigerant charge
Liquid tube size (mm)
Ø6.35
Ø9.52
Ø12.7
Ø15.88
Ø19.05
Ø22.22
Required additional refrigerant charge (kg) =
(A) = total length in meters of 25.4 mm diameter liquid tubing
(B) = total length in meters of 22.22 mm diameter liquid tubing
(C) = total length in meters of 19.05 mm diameter liquid tubing
(D) = total length in meters of 15.88 mm diameter liquid tubing
(E) = total length in meters of 12.7 mm diameter liquid tubing
(F) = total length in meters of 9.52 mm diameter liquid tubing
(G) = total length in meters of 6.35 mm diameter liquid tubing
(H) = Unit additional charge amount (Table 8)
• If the total amount of refrigerant (Required additional refrigerant charge + Quantity of refrigerant charge
when shipped) exceeds 80 kg, reduce the amount to 80 kg or less by changing the refrigerant tubing route.
• Be careful to charge accurately according to refrigerant weight.
• Charging procedure
Evacuate the system, close the gauge manifold at the gas tube side to ensure that no refrigerant enters the
gas tube side, then charge the system with liquid refrigerant at the liquid tube side. While charging, keep all
valves fully closed. The compressor can be damaged if liquid refrigerant is added at the gas tube side.
• If the system does not accept the predetermined quantity of refrigerant, fully open all valves and run the
system (either heating or cooling). While the system is running, gradually add refrigerant at the low pressure
side by slightly opening the valve on the cylinder just enough so that the liquid refrigerant is gasified as it is
sucked into the system. (This step is normally only needed when commissioning the system.)
All outdoor unit valves should be fully open.
• When charging is completed, fully open all valves.
• Avoid liquid back-flow when charging with R410A refrigerant by adding small amounts at a time.
Added compressor oil (FV68S)
amount (kg)
0.0
3.1
Additional charge
quantity per meter (g/m)
26
56
128
185
259
366
[456 × (A) + 366 × (B) + 259 × (C) + 185 × (D) + 128 × (E)
+ 56 × (F) + 26 × (G)] × 0.001 + Unit additional charge
amount (H)
EN - 22
Table 7
Type
U-10MES2E8 (28.0 kW)
U-20GES3E5 (56.0 kW)
Table 8
Type
U-10MES2E8
(28.0 kW)
U-20GES3E5
(56.0 kW)
) in Test Run item 13
Quantity of refrigerant
charge when shipped (kg)
5.6
11.5
Unit additional
charge amount (kg)
5.5
3.5