Connection Of Refrigerant Pipings - Mitsubishi Heavy Industries SRK19CSS-S3 User's Manual & Installation Manual

Connection of refrigerant pipings

Refrigerant pipe wall thickness and material
• Select refrigerant pipes of the table shown on the right wall thickness
and material as specified for each pipe size.
Select pipes having a wall thickness larger than the specified
NOTE
minimum pipe thickness.
Preparation
Keep the openings of the pipes covered with tapes etc. to prevent dust, sand, etc. from entering them.
Indoor
(Do not turn)
Remove
•
Remove the fl ared nuts.
(on both liquid and gas sides)
• Flaring work
Measurement B
Flaring block
Copper pipe
Connection of refrigerant piping
Liquid side
Indoor
Gas side
(Do not turn)
RMA012A105G_J-L_RevC_EN.indb 33 RMA012A105G_J-L_RevC_EN.indb 33
Outdoor
Press Press
Remove
•
Remove the fl ared nuts.
(on both liquid and gas sides)
Copper pipe
Clutch type flare
diameter
tool for R410A
φ 6.35
0.0~0.5
φ 9.52
0.0~0.5
φ 12.7
0.0~0.5
φ 15.88
0.0~0.5
Connect the pipes on both liquid and gas sides.
Liquid side
Outdoor
Tighten the nuts to the following torque.
Gas side
Liquid side (φ 6.35)
Gas side (φ 9.52)
(φ 12.7)
(φ 15.88)
Pipe diameter [mm]
Minimum pipe wall thickness [mm]
Pipe material*
* Phosphorus deoxidized seamless copper pipe ICS 23.040.15, ICS 77.150.30
Dimension A
Liquid side : ø6.35: 9.1
Gas side
A
•
Install the removed fl ared nuts to the pipes to be
connected, then fl are the pipes.
Measurement B (mm)
Use a flare tool designed for R410A or a
Conventional (R22) flare tool
conventional flare tool. Please note that
Clutch type Wing nut type
measurement B (protrusion from the flaring block)
1.0~1.5 1.5~2.0
will vary depending on the type of a flare tool in
use. If a conventional flare tool is used, please use a
1.0~1.5 1.5~2.0
copper pipe gauge or a similar instrument to check
1.0~1.5 2.0~2.5
protrusion so that you can keep measurement B to
a correct value.
1.0~1.5 2.0~2.5
• Do not apply excess torque to the
N·m (kgf·m)
14.0 ~ 18.0 (1.4~1.8)
34.0 ~ 42.0 (3.4~4.2)
49.0 ~ 61.0 (4.9~6.1)
68.0 ~ 82.0 (6.8~8.2)
– 33 –
ø6.35 ø12.7 ø15.88
0.8 0.8 1.0
O-type pipe O-type pipe O-type pipe
CAUTION
• Do not apply
(Unit : mm)
refrigerating
machine oil to the
ø9.52: 13.2
fl ared surface.
ø12.7: 16.6
ø15.88: 19.7
CAUTION
fl ared nuts.
Otherwise, the fl ared nuts may crack
depending on the conditions and
refrigerant leak may occur.
12/6/2018 11:48:26 AM 12/6/2018 11:48:26 AM