Daikin REYQ96MTJU, Инструкция по проектированию, установке и испытаниям, Страница: 33 / 236

Si39-406 Installation
General Information 27
New Rank Compatible Flare Tool
Compared to previous refrigerants, the components of a HFC refrigerant is small. R410A also has a higher
pressure than other refrigerants. Therefore, in order to strengthen the intensity of the form and size of the flare
section used for R410A (class 2) apparatus, unlike the specification of the conventional refrigerants, it was set
up with different standards.
When carrying out flare processing, use a new rank compatible flare tool or a conventional flare tool.
Flare Gauge (Adapter Corresponding to the New Rank)
When using the later, use a flare gauge to take out the pipe from the gauge bar, adjust it, and then carry out the
flare processing.
Size from the dice surface to the copper tip (in mm)
(d) Coat the inner and outer surface of the flare with refrigerator oil (Ester or ether oil). (this ensures that the
flare nut passes smoothly, preventing the pipe from twisting.)
Do not use SUNISO-4GS oil.
Important points
1. Burrs should be carefully removed.
2. 2 spanners should be used to grip the flare nuts.
3. The flare nut must be inserted before starting the flaring operation.
4. The appropriate amount of torque should be used to tighten the flare nut.
5. Check that there is no superficial damage to the surface of the flare.
Name
Outer
diameter
mm
Wall
thickness
mm
Previous refrigerant (R22, R407C etc.) R410A
The conventional flare tool The conventional flare tool
Clutch type Clutch type
1/4 6.35 0.8 0~0.5 1.0~1.5
3/8 9.52 0.8 0~0.5 1.0~1.5
1/2 12.70 0.8 0~0.5 1.0~1.5
5/8 15.88 1.0 0~0.5 1.0~1.5
Standard torques for tightening flare nut ±
10%
Size
Torque
ft. lbf (kgf-cm) (N-cm)
1/4(6.4
φ
) 10.4~12.7 144~176 1420~1720
3/8(9.5
φ
) 24.1~29.4 333~407 3270~3990
1/2(12.7
φ
) 36.5~44.5 504~616 4950~6030
5/8(15.9
φ
) 45.6~55.6 630~770 6180~7540
12mm×72mm
1.0×0.5mm Each
Flare gauge
Size
Thickness