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Si21-205
Field Piping and Wiring
Field Piping and Wiring
29
1.1.3 Service Tools
R410A is used under higher working pressure, compared to previous refrigerants (R22,R407C).
Furthermore, the refrigerating machine oil has been changed from Suniso oil to Ether oil, and if
oil mixing is occurred, sludge results in the refrigerants and causes other problems. Therefore,
gauge manifolds and charge hoses that are used with a previous refrigerant (R22,R407C) can
not be used for products that use new refrigerants.
Be sure to use dedicated tools and devices.
Tool compatibility
As for the charge mouthpiece and packing, 1/2UNF20 is necessary for mouthpiece size of
charge hose.
Tool
Compatibility
Reasons for change
HFC
HCFC
R410A
R407C
R22
Gauge manifold
Charge hose
2
Do not use the same tools for R22 and
R410A.
2
Thread specification differs for R410A
and R407C.
Charging cylinder
2
Weighting instrument used for HFCs.
Gas detector
2
The same tool can be used for HFCs.
Vacuum pump
(pump with reverse flow
preventive function)
2
To use existing pump for HFCs,
vacuum pump adaptor must be
installed.
Weighting instrument
Charge mouthpiece
2
Seal material is different between R22
and HFCs.
2
Thread specification is different
between R410A and others.
Flaring tool (Clutch type)
2
For R410A, flare gauge is necessary.
Torque wrench
2
Torque-up for 1/2 and 5/8
Pipe cutter
Pipe expander
Pipe bender
Pipe assembling oil
2
Due to refrigerating machine oil
change. (No Suniso oil can be used.)
Refrigerant recovery
device
Check your recovery device.
Refrigerant piping
See the chart below.
2
Only
φ
19.1 is changed to 1/2H material
while the previous material is "O".
Pipe size
φ
6.4
φ
9.5
φ
12.7
φ
15.9
φ
19.1
φ
22.2
φ
25.4
φ
28.6
φ
31.8
φ
38.1
R407C
Material
O
O
O
O
O
1/2H
1/2H
1/2H
1/2H
1/2H
R410A
Material
O
O
O
O
1/2H
1/2H
1/2H
1/2H
1/2H
1/2H
Thickness
t (mm)
0.8
0.8
0.8
1.0
1.0
1.0
1.0
1.0
1.2
1.4
Thickness
t (mm)
0.8
0.8
0.8
1.0
1.0
1.0
1.0
1.0
1.10
1.40
Summary of Contents for Sky Air B-Series R-410A
Page 7: ...Si21 205 vi Table of Contents ...
Page 15: ...Models Si21 205 4 Model Name and Power Supply ...
Page 16: ...Si21 205 Functions 5 Part 2 Functions 1 List of Functions 6 ...
Page 35: ...Wireless Remote Controller Si21 205 24 Remote Controller ...
Page 79: ...Settings Concerning Maintenance Si21 205 68 Field Setting Detail of PCB 2 ...
Page 83: ...Maintenance Mode Setting Si21 205 72 Field Setting ...
Page 239: ...Troubleshooting for Outdoor Unit 50 60 class Si21 205 228 Troubleshooting ...
Page 321: ...Outdoor Unit 50 60 class Si21 205 310 Removal Procedure ...