York TIWM006B22S - Piping Connections

20
P5417090
(2) Use specic are nut attached with the unit.
(3) Verify that there are no scratches, burrs stuck to internal surfaces, or surface deformations at the ared
opening.
(4) Before tightening the are nut, apply the (Field-Supplied) refrigerant oil in a thin layer over the ared
part. (Do not apply the oil on other areas.) Tighten the are nut for the liquid pipe to the specied
torque with two spanners. Then, tighten the are nut for the gas piping in the same way. After the
tightening work is completed, check that no refrigerant leakage occurs.
NOTE:
Refrigerant oil is eld-supplied.
[ Ethereal Oil FVC68D (Idemitsu Kousan Co. Ltd.) ]
Required Tightening Torque (JIS B 8607)
Pipe Size Tightening Torque
1/4 inch (6.35 mm) 10.3 - 13.3 ft·lbs (14 - 18 N·m)
3/8 inch (9.52 mm) 25.1 - 31.0 ft·lbs (34 - 42 N·m)
1/2 inch (12.7 mm) 36.1 - 45.0 ft·lbs (49 - 61 N·m)
5/8 inch (15.88 mm) 50.2 - 60.5 ft·lbs (68 - 82 N·m)
inch (mm)
Diameter
(d)
f
A
0
-0.02 (-0.4)
1/4 (6.35) 0.36 (9.1)
3/8 (9.52) 0.52 (13.2)
1/2 (12.7) 0.65 (16.6)
5/8 (15.88) 0.78 (19.7)
(1) Perform the aring work as shown below.
6.2 Piping Connections
(5) Wherever buried piping exists on site, make sure there is a service doorway to provide adequate
access to inspect piping sockets and elbows, and for interconnecting parts.
(6) Piping must be reinforced to withstand earthquakes so as not to be damaged by an external force.
(7) Do not tightly secure refrigerant piping to accommodate expansion and contraction.
(8) Prevent the pipes from contacting weak portions such as wall, ceiling, etc. (Otherwise, abnormal sound
may be heard due to vibration of the piping.)
(9) Leak test all piping and connections. Perform procedures in accordance with the "Installation and
Maintenance Manual" for the outdoor unit.
(10) Insulate each are connection without gap with accessory insulations to prevent condensation. Then
insulate each refrigerant pipe as well.
Insulation for Indoor Piping Connection
Wrap the pipe insulation accessory around the are connection and secure it with tape as shown in the
gure below.
Pipe Insulation
(Accessory)
Do not apply
the refrigerant
oil to the
outside of the
aring opening.
Apply Refrigerant Oil.
0.4 ~ 0.8R
fA
fd
90
o
+
2
o
45
o
+
2
o
Use two wrenches for
tightening the are nut.