En-3
2.2. Special tools for R410A
Tool name Contents of change for R22 tool
Gauge
manifold
Pressure is huge and cannot be measured with a conventional gauge.
To prevent erroneous mixing of other refrigerants, the diameter of each
port has been changed.
It is recommended to use a gauge manifold with a high pressure display
range 500 microns to 768 psi (-0.1 to 5.3 MPa) and a low pressure
display range 500 microns to 551 psi (-0.1 to 3.8 MPa).
Charging
hose
To increase pressure resistance, the hose material and base size were
changed.
Vacuum
pump
A conventional vacuum pump can be used by installing a vacuum pump
adapter.
• A conventional vacuum pump can be used by installing a vacuum
pump adapter.
• Be sure that the pump oil does not back flow into the system. Use one
capable for vacuum suction of 500 microns (-100.7 kPa).
Gas leakage
detector
Special gas leakage detector for HFC refrigerant R410A.
2.3. Accessories
Use connecting parts as required.
Do not throw away the connecting parts until the installation has been complete.
Name and shape Q’ty Application
Installation manual
1
(This manual)
Specifications
manual
1—
Push mount cable tie (Black)
2
For fixing power cable
Push mount cable tie (White)
3
For fixing transmission cable
Cable tie
1
For fixing transmission cable
Joint pipes included to each outdoor unit
Name and shape [in (mm)]
ID: Inside diameter
OD: Outside diameter
Quantity per model
AOUA72/96 AOUA120
AOUA
144/168/192
Joint pipe A
ID 1 (25.4)
ID 1-1/8 (28.58)
ID 7/8 (22.22)
ID 3/4 (19.05)
1—1
Joint pipe B
ID 3/4 (19.05)
ID 7/8 (22.22)
ID 3/4 (19.05)
ID 5/8 (15.88)
1——
Joint pipe C
ID 1-1/8 (28.58)
—1 1
Joint pipe D
ID 1-1/8 (28.58)
ID 1 (25.4)
ID 3/4 (19.05)
—1—
Joint pipe E
OD 1-1/8 (28.58)
ID 1 (25.4)
OD 3/4 (19.05)
OD 7/8 (22.22)
1—1
Name and shape [in (mm)]
ID: Inside diameter
OD: Outside diameter
Quantity per model
AOUA72/96 AOUA120
AOUA
144/168/192
Joint pipe F
OD 7/8 (22.22)
OD 3/4 (19.05)
OD 5/8 (15.88)
ID 3/4 (19.05)
1——
Joint pipe G
ID 1-1/8 (28.58)
OD 1-1/8 (28.58)
—1 1
Joint pipe H
OD 1-1/8 (28.58)
ID 1 (25.4)
OD 3/4 (19.05)
—1—
Joint pipe I
OD 1/2 (12.70)
ID 3/8 (9.52)
1——
Joint pipe J
OD 1/2 (12.70)
ID 5/8 (15.88)
——
1
(Not used for
AOUA144.)
Application of the joint pipes
Model
Joint
pipe type
For Heat
Pump sys-
tem
For Heat Recovery system
For between
outdoor unit
liquid pipe
and branch
kit
For gas pipe
For dis-
charge gas
pipe
For suction
gas pipe
AOUA72/96
Elbow Joint pipe B Joint pipe B Joint pipe A —
Straight Joint pipe F Joint pipe F Joint pipe E Joint pipe I
AOUA120
Elbow Joint pipe D Joint pipe D Joint pipe C —
Straight Joint pipe H Joint pipe H Joint pipe G —
AOUA144/
168/192
Elbow Joint pipe A Joint pipe A Joint pipe C —
Straight Joint pipe E Joint pipe E Joint pipe G Joint pipe J
2.4. Combinations
A maximum of 3 outdoor units can be connected to 1 refrigerant system.
For the combination of outdoor units per refrigerant system, refer to the Design & Techni-
cal manual.
The number of indoor units that can be connected are as follows:
Ton
Cooling
capacity
(Btu/h)
Set model
name
Model name
Maximum
number of
connectable
indoor units
Unit 1 Unit 2 Unit 3
6 72,000
AOUA72UL*V5 AOUA72UL*V5
——16
8 96,000
AOUA96UL*V5 AOUA96UL*V5
——21
10 120,000
AOUA120UL*V5 AOUA120UL*V5
——26
12 144,000
AOUA144UL*V5 AOUA144UL*V5
——32
14 168,000
AOUA168UL*V5 AOUA168UL*V5
——37
16 192,000
AOUA192UL*V5 AOUA192UL*V5
——42
18 216,000
AOUA216UL*VG5
AOUA120UL*V5 AOUA96UL*V5
—47
20 240,000
AOUA240UL*VG5
AOUA120UL*V5 AOUA120UL*V5
—52
22 264,000
AOUA264UL*VG5
AOUA144UL*V5 AOUA120UL*V5
—58
24 288,000
AOUA288UL*VG5
AOUA144UL*V5 AOUA144UL*V5
—64
26 312,000
AOUA312UL*VG5
AOUA168UL*V5 AOUA144UL*V5
—64
28 336,000
AOUA336UL*VG5
AOUA168UL*V5 AOUA168UL*V5
—64
30 360,000
AOUA360UL*VG5
AOUA192UL*V5 AOUA168UL*V5
—64
32 384,000
AOUA384UL*VG5
AOUA192UL*V5 AOUA192UL*V5
—64
34 408,000
AOUA408UL*VG5
AOUA144UL*V5 AOUA144UL*V5 AOUA120UL*V5
64
36 432,000
AOUA432UL*VG5
AOUA144UL*V5 AOUA144UL*V5 AOUA144UL*V5
64
2.5. Optional parts
CAUTION
The following parts are optional parts specific to R410A refrigerant.
Do not use parts other than those listed below.
9378945722-05_IM_L3.indb 39378945722-05_IM_L3.indb 3 2023/3/24 9:23:482023/3/24 9:23:48
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