Panasonic U-72MF1U9 Technical Data Manual page 19

1. Model Selecting and Capacity Calculator
Refrigerant Charge Amount at Shipment (for outdoor unit)
U-72MF1U9
DC
U-72MF1U9E
(oz)
416
Additional Refrigerant Charge
Additional refrigerant charge amount is calculated from the liquid tubing total length as follows.
Amount of Refrigerant Charge Per ft., According to Liquid Tubing Size
Liquid tubing size
(in. (mm))
ø1/4" (ø6.35)
ø3/8" (ø9.52)
ø1/2" (ø12.7)
ø5/8" (ø15.88)
ø3/4" (ø19.05)
ø7/8" (ø22.22)
Table 2-1-1 Necessary Amount of Refrigerant Charge Per Outdoor Unit
U-72MF1U9
U-72MF1U9E U-96MF1U9E
42 oz/unit
System Limitations
Max. No. allowable connected outdoor units
Max. capacity allowable connected outdoor units
Max. connectable indoor units
Max. allowable indoor/outdoor capacity ratio
*1: Up to 3 units can be connected if the system has been extended.
U-96MF1U9
U-96MF1U9E
Amount of refrigerant
charge (oz/ft.)
0.279
0.602
1.38
1.99
2.78
3.93
U-96MF1U9
42 oz/unit
416
Required amount of additional refrigerant charge = [(Amount of
additional refrigerant charge per ft. of each size of liquid tube ×
its tube length) + (...) + (...)] + [Necessary amount of additional
refrigerant charge per outdoor unit + (...) + (...)]
* Always charge accurately using a scale for weighing.
3 *1
288,000 BTU/h (24-Ton, 84 kW)
40
50 – 130 %
2 - 5
Design of 3WAY VRF SYSTEM
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