Mitsubishi Electric PUHZ-SHW80VHA Service Manual page 7

( 2 ) C autions for refrigerant p ip ing work
1
Diagram below: Piping diameter and thickness
Nominal Outside
diameter (mm)
dimensions(inch)
1/ 4
3/ 8
1/ 2
5/ 8
3/ 4
2
Flare cutting dimensions
Nominal
Outside
dimensions(in) diameter (mm)
1/ 4 6.35
3/ 8 9 .52
1/ 2 12.7 0
5/ 8 15.88
3/ 4 19 .05
3
Tools and materials
Gauge manifold
Charge hose
Gas leak detector
Refrigerant recovery eq uipment
Refrigerant cylinder
Applied oil
Safety charger
Charge valve
V acuum pump
Flare tool
B ender
Pipe cutter
Welder and nitrogen gas cylinder
Refrigerant charging scale
V acuum gauge or thermis-
tor vacuum gauge and
vacuum valve
Charging cylinder
: Prepare a new tool. (Use the new tool as the tool ex clusive for R410A.)
: Tools for other refrigerants can be used under certain conditions.
: Tools for other refrigerants can be used.
OCH526C
Thickness (mm)
R410A
6.35 0.8
9 .52 0.8
12.7 0 0.8
15.88 1.0
—
19 .05
Dimension A ( + 0 ) (mm)
-0.4
R410A R22
9 .1 9 .0
13.2 13.0
16.6 16.2
19 .7 19 .4
—
23.3
Use R410A tools
Air purge, refrigerant charge
Tool ex clusive for R410A
and operation check
Tool ex clusive for R410A
Tool for HFC refrigerant
Gas leak check
Refrigerant recovery
Tool ex clusive for R410A
Refrigerant charge Tool ex clusive for R410A
Apply to flared section Ester oil, ether oil and alky-
lbenzene oil (minimum amount)
Prevent compressor malfunction Tool ex clusive for R410A
when charging refrigerant by
spraying liq uid refrigerant
Prevent gas from blowing out Tool ex clusive for R410A
when detaching charge hose
V acuum drying and air Tools for other refrigerants can
purge be used if eq uipped with adap-
ter for reverse flow check
Flaring work of piping Tools for other refrigerants
can be used by adjusting
flaring dimension
B end the pipes Tools for other refrigerants can be used
Cut the pipes Tools for other refrigerants can be used
Weld the pipes Tools for other refrigerants can be used
Tools for other refrigerants can be used
Charge refrigerant
Check the degree of vacuum. (V acuum Tools for other refrigerants
valve prevents back flow of oil and refri-
can be used
gerant to thermistor vacuum gauge)
Refrigerant charge
Tool ex clusive for R410A
R22
0.8
0.8
0.8
1.0
1.0
Flare nut dimensions
Nominal Outside
dimensions(in) diameter (mm)
1/ 4 6.35
3/ 8 9 .52
1/ 2 12.7 0
5/ 8 15.88
3/ 4 19 .05
Can R22 tools be used?
(Usable if eq uipped
with adapter for rever-
se flow)
(Usable by adjusting
flaring dimension)
Dimension B (mm)
R410A R22
17 .0
17 .0
22.0 22.0
* 36.0mm for
26.0 24.0
indoor unit
29 .0 27 .0
*
of RP100,
-
36.0 125 and 140
Can R407 C tools be used?
Ester oil, ether oil:
Alkylbenzene oil: minimum amount
(Usable if eq uipped
with adapter for rever-
se flow)
(Usable by adjusting
flaring dimension)