Conversion Chart Of Refrigerant Temperature And Pressure; Tools Dedicated For The Air Conditioner With R410A Refrigerant; Refrigerant Piping - Mitsubishi Electric MSC-A07WV Service Manual

Conversion chart of refrigerant temperature and pressure

(MPa [Gauge])
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
-0.5
-30 -20 -10

1.Tools dedicated for the air conditioner with R410A refrigerant

The following tools are required for R410A refrigerant. Some R22 tools can be substituted for R410A tools.
The diameter of the service port on the stop valve in outdoor unit has been changed to prevent any other refrigerant being
charged into the unit. Cap size has been changed from 7/16 UNF with 20 threads to 1/2 UNF with 20 threads.
R410A tools Can R22 tools be used?
Gauge manifold
Charge hose
Gas leak detector
Torque wrench
Flare tool
Flare gauge
Vacuum pump
adapter
Electronic scale for
refrigerant charging
No : Not Substitutable for R410A

2.Refrigerant piping

1 Specifications
Use the refrigerant pipes that meet the following specifications.
Pipe
For liquid
For gas
• Use a copper pipe or a copper-alloy seamless pipe with a thickness of 0.8 mm. Never use any pipe with a thickness less
than 0.8mm, as the pressure resistance is insufficient.
R410A
R22
0 10 20 30 40 50
R410A has high pressures beyond the measurement range of existing
gauges. Port diameters have been changed to prevent any other refrigerant
No
from being charged into the unit.
Hose material and cap size have been changed to improve the pressure
No
resistance.
No Dedicated for HFC refrigerant.
Yes
6.35 mm and 9.52 mm
No 12.7 mm
Yes Clamp bar hole has been enlarged to reinforce the spring strength in the tool.
Provided for flaring work (to be used with R22 flare tool).
New
Provided to prevent the back flow of oil. This adapter enables you to use
New
vacuum pumps.
It is difficult to measure R410A with a charging cylinder because the
New
refrigerant bubbles due to high pressure and high-speed vaporization
Yes : Substitutable for R410A
Outside diameter
Wall
mm thickness
0.8 mm
6.35
9.52 0.8 mm
0.8 mm
12.7
NOTE : The unit of pressure has been changed to MPa on the
international system of units(SI unit system).
The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/f
(:)
60
Insulation material
Heat resisting foam plastic
Specific gravity 0.045 Thickness 8 mm
4
Description
f [Gauge])