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8
P5417009-rev.6
G
: Interchangeability is available with current R22
l
: Only for Refrigerant R410A (No Interchangeability with R22)
5
: Prohibited
F
: Only for Refrigerant R407C (No Interchangeability with R22)
Measuring Instrument and Tool
Interchangeability
with R22
Reason of Non-Interchangeability and Attention
(
H
: Strictly Required)
Use
R410A R407C
Refrigerant
Pipe
Copper Tube Cutter,
Chamfering Reamer
G
G
-
Cutting Pipe
Removing Burrs
Flaring Tool
G l
G
* The flaring tools for R407C are applicable to R22.
* If using a flaring tube, make the dimension of the
tube larger for R410A.
* For a hard temper pipe, flaring is not available.
Flaring for Tubes
Extrusion
Adjustment Gauge
l
-
Dimensional Control
for Extruded Portion
of Tube after Flaring
Pipe Bender
G
G
* For a hard temper pipe, bending is not available.
Use an elbow for bending and brazing.
Bending
Expanding Tool
G
G
* For a hard temper pipe, expansion of the tube is
not available. Use socket for connecting tube.
Expanding Tubes
Torque Wrench
l
G
* For 1/2 inch D. (12.7mm), 5/8 inch D. (15.88mm),
spanner size is up 1/16 inch (2mm).
Connection of
Flare Nut
G
G
* For 1/4 inch D. (6.35mm), 3/8 inch D. (9.52mm),
3/4 inch D. (19.05mm), spanner size is the same.
Brazing Tool
G
G
* Perform correct brazing work.
Brazing for Tubes
Nitrogen Gas
G
G
* Strict Control against Contamination
(Blow nitrogen during brazing.)
Prevention from
Oxidation during
Brazing
Lubrication Oil
(for Flare Surface)
l
F
* Use a synthetic oil which is equivalent to the oil
used in the refrigeration cycle.
* Synthetic oil absorbs moisture quickly.
Applying Oil to
the Flared Surface
Vacuum
Drying
l
Refrigerant
Charge
Refrigerant
Cylinder
l
F
* Check refrigerant cylinder color.
H
Liquid refrigerant charging is required for zeotropic
refrigerant.
Refrigerant
Charging
Vacuum Pump
G
G
H
The current ones are applicable. However, it is
required to mount a vacuum pump adapter which
can prevent reverse flow when a vacuum pump
stops, resulting in no reverse oil flow.
Vacuum Pumping
Adapter for
Vacuum Pump
S
l
F
Manifold Valve
l
F
* No interchangeability is available due to higher
pressures when compared with R22.
H
Use the same ones as for the current refrigerant.
Otherwise, mineral oil will flow into the cycle and
cause sludge resulting in clogging or compressor
failure.
Connection diameter is different; R410A: UNF1/2,
R407C: UNF7/16.
Vacuum Pumping,
Vacuum Holding,
Refrigerant
Charging and Check
of Pressures
Charging Hose
l
F
Charging Cylinder
5
5
* Use the weight scale to ensure proper charging of
the unit.
-
Weight Scale
G
G
-
Measuring
Instrument for
Refrigerant
Charging
Refrigerant Gas
Leakage Detector
S
l
F
* The current gas leakage detector (R22) is not
applicable due to a different detecting method.
Gas Leakage Check
S
: Interchangeability with R407C.
Содержание YVAHR072B32S
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Страница 88: ...P5417009 rev 6 Code No LIT 12012492 Revised February 2019 2017 Johnson Controls Inc ...