Charging Procedure - Panasonic U-16GE3E5 Verfahren Und Technische Punkte Für Die Installation Der Anlage

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 (g)
(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)
• 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.
• When charging with additional refrigerant, use liquid only.
• R410A cylinders are colored gray with a pink top.
• Check whether a siphon tube is present (indicated on the label at the
top of the cylinder).
• Depending on refrigerant and system pressure, conventional
refrigerant (R22, R407C) equipment may or may not be compatible
with R410A equipment, so care is needed.
In particular, the gauge manifold used must be specifically designed
for R410A.
• Be sure to check the limiting density.
• Refer to the section "4. OPENING THE SHUT-OFF VALVES" (→ page 20)
when the instructions call for fully opening all valves.
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) + Unit additional charge amount (H)
EN - 18
Table 7
Type
45.0 kW
56.0 kW
71.0 kW
85.0 kW
Table 8
Type
45.0 kW
56.0 kW
71.0 kW
85.0 kW
Quantity of refrigerant
charge when shipped (kg)
11.5
Unit additional charge amount (kg)
2WAY 3WAY
0.5 1.5
3.5 4.5
9.5 9.5
9.5 ─
Pink
Liquid
Siphon tube
refrigerant
R410A cylinder