INS-6
DUAL, TRIPLE, POKER DC Inverter : 4. Installation
Multi Liberty
DC Inverter
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Refrigerant pipings
1.
Use refrigerant pipings and materials designed for
R410A
refrigerant.
Pipings’ diameter
Φ 6.35mm
Φ 9.52mm
Φ 12.7mm
Φ 15.88mm
Φ19.05mm
Min. thickness (mm)
0.8
0.8
0.8
1.0
1.2
Note:
Carry out installation of refrigerant pipings in full observance of current regulations.
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Tools
Roller pipe cutter Cutting of refrigerant pipings.
*Flare tool Piping flaring.
*Torque wrench Piping connection tightening.
Countersink (weldings only) Expansion (“sockets”) of pipings.
Tube bender Bending of pipings.
Refrigerant pipings
connections.
Nitrogen cylinder (gas) For welding without oxidation.
Cylinders and torch Braze welding.
Connections’ seal.
*Gaugemanifold
*Service pipings
(so-called “whips”)
Vacuum operations and
refrigerant charge.
Pressure test.
Additional charge of
R410A refrigerant.
*Vacuum pump
(with one-way valve)
Elimination of air and
humidity left over in
refrigerant pipings.
Electronic balance
*Electronic gas leak detector Specific for HFC. Check of leakages.
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Useful suggestions
2.
For min. thickness of refrigerant pipings, refer to the following table.
The star (*) indicates tools that have been designed for
R410A
refrigerant specifically. Please keep
these tools separately from those that are currently used for other kind of refrigerant.
Additional charge: with
R410A refrigerant.
Check of refrigerant required by system.
Before starting installation, check which refrigerant
(R410A)
is required by system, and get ready the materials and tools specific for refrigerant itself.
Refrigerant pipings.
Respect usual precautions for a professional installation of pipings, in order to
prevent any possible malfunction of system. If weldings are required, take care of making them in
nitrogen atmosphere, in order to prevent any oxidation inside the pipings, near welding points.
Pressure test.
Keep the system under pressure (4.15 MPa) with nitrogen for about 24 hours so as to
make sure that refrigerant connections have a satisfactory seal.
Vacuum operation.
Install a one-way valve on vacuum pump, in case this device is not already
foreseen on the pump itself.
Additional charge.
Calculate the eventual additional amount of
R410A
, and add refrigerant in
coorect way, by using an electronic precision balance and specific service pipings.
Tool
Specific use of tool