Daikin RZQ140B7W1B [17/326] Service tools

Daikin RZQ71B8V3B [17/326] Service tools
ESIE05-03 Introduction
vii
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4
5
1.3.4 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.
P Tool compatibility
As for the charge mouthpiece and packing, 1/2UNF20 is necessary for mouthpiece size of charge
hose.
Tool
Compatibility
Reasons for changeHFC HCFC
R410A R407C R22
Gauge manifold
Charge hose
X
P Do not use the same tools for R22
and R410A.
P Thread specification differs for
R410A and R407C.
Charging cylinder
XO
P Weighting instrument used for
HFCs.
Gas detector
OX
P The same tool can be used for
HFCs.
Vacuum pump
(pump with reverse flow
preventive function)
O
P To use existing pump for HFCs,
vacuum pump adaptor must be
installed.
Weighting instrument O
Charge mouthpiece
X
P Seal material is different between
R22 and HFCs.
P Thread specification is different
between R410A and others.
Flaring tool (Clutch
type)
O
P For R410A, flare gauge is
necessary.
Torque wrench O
P Torque-up for 1/2 and 5/8
Pipe cutter O
Pipe expander O
Pipe bender O
Pipe assembling oil
X
P 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.
P Only φ19.1 is changed to 1/2H
material while the previous material is
"O".
ESIE05-03.book Page vii Wednesday, April 6, 2005 4:09 PM

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