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2.2 Necessary Tools and Instrument List for Installation
No. Tool No. Tool No. Tool No. Tool
1 Handsaw 6 Copper Pipe Bender 11 Spanner 16 Leveller
2
Phillips
Screwdriver
7
Manual Water Pump
12
Charging Cylinder
17
Clamper for Solder-
less Terminals
3 Vacuum Pump 8 Pipe Cutter 13 Gauge Manifold 18
Hoist
(for Indoor Unit)
4
Refrigerant Gas
Hose
9 Brazing Kit 14 Cutter for Wires 19 Ammeter
5 Megohmmeter 10 Hexagon Wrench 15 Gas Leak Detector 20 Voltage Meter
✕: Prohibited
✦
: Only for Refrigerant R407C (No Interchangeability with R22)
Measuring Instrument and Tool
Interchangeability
with R22
Reason of Non-Interchangeability and Attention
(
: Strictly Required)
Use
R410A R407C
Refrigerant
Pipe
Pipe Cutter,
Chamfering
Reamer
-
Cutting Pipe
Removing Burrs
Flaring Tool
* The flaring tools for R407C are applicable to R22.
* If using faring tube, make dimension of tube larger
for R410A.
* In case of hard temper pipe, flaring is not available.
Flaring for Tubes
Extrusion
Adjustment Gauge
-
Dimensional Control
for Extruded Portion
of Tube after Flaring
Pipe Bender
* In case of hard temper pipe, bending is not
available.
Use elbow for bend and braze.
Bending
Expanding Tool
* In case of hard temper pipe, expanding of tube is
not available. Use socket for connecting tube.
Expanding Tubes
Torque Wrench
* For 1/2 in D. (12.7mm), 5/8 in D. (15.88mm),
spanner size is up 3/32 in (2mm).
Connection of
Flare Nut
* For 1/4 in D. (6.35mm), 3/8 in D. (9.52mm),3/4
in D. (19.05mm), spanner size is the same.
Brazing Tool
* Perform correct brazing work. Brazing for Tubes
Nitrogen Gas
* Strict Control against Contamin
(Blow nitrogen during brazing.)
Prevention from
Oxidation during
Brazing
Lubrication Oil
(for Flare Surface)
* 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
Refrigerant
Charge
Refrigerant
Cylinder
* Check refrigerant cylinder color.
Liquid refrigerant charging is required regarding
zeotropic refrigerant.
Refrigerant Charging
Vacuum Pump
The current ones are applicable. However, it is
required to mount a vacuum pump adapter which
can prevent from reverse flow when a vacuum
pump stops, resulting in no reverse oil flow.
Vacuum Pumping
Adapter for
Vacuum Pump
Manifold Valve
* No interchangeability is available due to higher
pressures when compared with R22.
Do not use current ones to the different refrigerant.
If used, mineral oil will f ow into the cycle and
cause sludges, 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
Charging Cylinder
* Use the weight scale. -
Weight Scale
-
Measuring
Instrument for
Refrigerant Charging
Refrigerant Gas
Leakage Detector
* The current gas leakage detector (R22) is not
applicable due to different detecting method.
Gas Leakage Check
: Interchangeability with R407C.
Use tools and measuring instruments exclusive for the new refridgerant in case of direct contact with refrigerant.
✧: Interchangeability is available with current R22 ●: Only for Refrigerant R410A (No Interchangeability with R22)
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