Panasonic U-72MF2U9 Technical Data Manual page 23

1. Model Selection and Capacity Calculator
1. Model Selecting and Capacity Calculator
Example 1
Outdoor
L4: 99ft. (30m)
unit 1
Portion increased by LF: 49ft.
one size is overlapped
but only one size is
increased.
LG: 180ft. (40m)
1. Check the portion for one size increase.
L2 system 164ft. (50m)
L2' system 139ft. (42m)
L2 combined indoor units
Increase the discharge, suction and liquid tubes 39ft. (12m) by one size from the 1st distribution joint to be directed towards
L2 indoor units.
LF: Increase 39ft. (12m) by one size among 49ft. (15m).
LG: No increase by one size
L2' combined indoor units
Increase the discharge, suction and liquid tubes 66ft. (20m) by one size from the 1st distribution joint to be directed towards
L2' indoor units.
LF: Increase all 49ft. (15m) by one size
LH: Increase 16ft. (5m) by one size among 115ft. (35m).
2. Final result
Before sizing up
LF ø1-1/8" / ø7/8" / ø1/2"
ø3/4" / ø5/8" / ø3/8"
LG
LH ø7/8" / ø3/4" / ø3/8"
* The LH is only 16ft. (5m) from the 2nd distribution joint.
* The size increased portion is overlapped at the LF but it has only one size increase.
Example 2
Outdoor Outdoor
unit 1 unit 2
L4: 33ft.
(10m)
1. Checking the portion for one size increase
L2 system 164ft. (50m)
L2 combined indoor units
Increase the discharge, suction and liquid tubes 92ft. (28m) by one size from the 1st distribution joint to be directed towards
L2 indoor units.
LF: Increase 66ft. (20m) by one size.
LG: Increase 26ft. (8m) by one size among 33ft. (10m).
2. Final result
Before sizing up
LF
ø3/4" / ø5/8" / ø3/8"
LG
ø5/8" / ø1/2" / ø3/8"
* The LG is only 26ft. (8m) from the 2nd distribution joint.LG
* It is possible to increase the LG to 33ft. (10m) by one size.
(15m)
L2': 238ft. (72m)
LH: 115ft. (35m)
Type 140 Type 140
L2: 263ft. (80m)
Type 28 Type 56 Type 56
L Total capacity of indoor units
47,000 BTU/h (14kW)
94,000 BTU/h (28kW)
After sizing up
ø1-3/8" / ø1-1/8" / ø5/8"
No size up
ø1-1/8" / ø7/8" / ø1/2"
L2: 197ft. (60m)
LG: 33ft. (10m)
LF: 66ft. (20m)
Type 140 Type 140
L Total capacity of indoor units
238,000 BTU/h (70kW)
After sizing up
ø7/8" / ø3/4" / ø1/2"
ø3/4" / ø5/8" / ø1/2"
Length for sizing up
39ft. (12m)
66ft. (20m)
Tube length Size up length
49ft. (15m) 49ft. (15m)
131ft. (40m) 0 ft. (0m)
115ft. (35m) 16ft. (5m)
Length for sizing up
92ft. (28m)
Tube length Size up length
66ft. (20m) 66ft. (20m)
33ft. (10m) 26ft. (8m)
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Design of 3WAY VRF SYSTEM
Design of 3WAY VRF SYSTEM
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