Panasonic Urban Multi MX1 Series Manual page 98

Appendix (Check Points in Installing UM Series)
8.7 Precautions in Charging Refrigerant
8.7.1 Mark the Model Number of the Indoor Unit and Its Location.
This information is needed for aftercare service.
Indoor unit
model number
Location
8.7.2 Calculating Refrigerant Charge
Additional charge
=
kg
Example of refrigerant branch with Line branch pipes
Example of refrigerant branch with Line branch pipes and Header branch pipes
Example of refrigeran× branch with Header branch pipes
8.7.3 Full Refrigerant Recharging
The amount of refrigerant needed to completely recharge the system equals to that of the refrigerant
charge at factory set (marked on name plate) plus the above additional charge.
8.7.4 Extracting Refrigerant
Open the stop valves on both the gas line and liquid line, and extract the refrigerant from the service ports.
98
1
Calculate the charge of refrigerant needed as described below, and add accordingly.
The equipment can be operated as is without further charging if calculations come to 0 or less.
Record your calculations for use by aftercare service.
Total length of liquid line piping (φ 12.7) × 1
2 3 4
Total length of liquid line piping (φ 9.5) × 0.05
+
(m) × 0.1
Total length of liquid line piping (φ 6.4) × 0.025
a : φ 12.7 × 30m
b : φ 12.7 × 5m
c : φ 12.7 × 5m
d : φ 12.7 × 5m
e : φ 9.5 × 3m
f : φ 9.5 × 2m
g : φ 9.5 × 5m
h : φ 9.5 × 5m
R – 45 × 0.1 + 20 × 0.05
↑
a+b+c+d
+ 30 × 0.025 – 2 = 4.25
↑
i+j+k+m+n+p
a : φ 12.7 × 30m
b : φ 12.7 × 10m
c : φ 9.5 × 10m
d : φ 6.4 × 10m
e : φ 6.4 × 10m
f : φ 6.4 × 10m
R – 40 × 0.1 + 30 × 0.05
↑
a+b
+ 69 × 0.025 – 2 = 5.225
↑
d+e+f+g+h+i
a : φ 12.7 × 40m
b : φ 9.5 × 20m
c : φ 9.5 × 10m
d : φ 6.4 × 10m
e : φ 6.4 × 20m
R – 40 × 0.1 + 30 × 0.05
↑
a
+ 123 × 0.025 – 2 = 6.575
↑
d+e+f+g+h+i
PACD011001G2 / PACD011004G3
5 6 7
(m) × 0.05
– 2
(m) × 0.025
i : φ 6.4 × 5m
j : φ 6.4 × 5m
k : φ 6.4 × 5m
l : φ 9.5 × 5m
m : φ 6.4 × 5m
n : φ 6.4 × 5m
p : φ 6.4 × 5m
↑
e+f+g+h+i
4.3kg
g : φ 6.4 × 10m
h : φ 6.4 × 20m
i : φ 9.5 × 10m
j : φ 9.5 × 10m
k : φ 6.4 × 9m
↑
c+i+j
5.2kg
f : φ 6.4 × 23m
g : φ 6.4 × 20m
h : φ 6.4 × 20m
i : φ 6.4 × 30m
↑
b+c
6.6kg
Urban Multi Inverter "MX1" Series
8
(M051)