Daikin EWLQ014KCW1N, Инструкция по установке, эксплуатации и обслуживанию

Страница: 10 / 25

D-EIMHP01601-22_00EN 10/25
9.2 Connecting the refrigerant circuit
•
Use a pipe cutter and flare suitable for
R410A.
◼
Installation tools:
Make sure to use installation tools (gauge manifold charge hose, etc.) that are exclusively used for
R410A
installations to withstand
the pressure and to prevent foreign materials (e.g., mineral oils such as
SUNISO
and moisture) from mixing into the system.
Figure 3-Connecting the refrigerant circuit (1)
•
Vacuum pump (use a 2-stage vacuum pump with a non-return valve):
- Make sure the pump oil does not flow oppositely into the system while the pump is not working.
- Use a vacuum pump which can evacuate to
–
100.7 kPa (5 Torr, – 755 mm Hg
).
•
Be sure to use both a spanner and torque wrench together when connecting or disconnecting pipes to/from the
unit.
Figure 4-Connecting the refrigerant circuit (2)
1.
Torque wrench
2.
Spanner
3.
Piping union
4.
Flare nut
◼
Refer to the table below for the dimensions of flare nut spaces and the appropriate
◼
tightening torque. (Overtightening may damage the flare and cause leaks.)
Table 3- Flare nut spaces dimensions and appropriate tightening torque
Pipe gauge Tightening torque Flare dimension A (mm) Flare shape
Ø 9.5 33~39 N•m 12.0~12.4
Ø 12.7 50~60 N•m 15.4~15.8
Ø 19.1 97~110 N•m 22.9~23.3
1 remote condenser
2 indoor water chiller
3 discharge
4 oil trap
5 liquid
A>0 m
A A
10m
1
0
m
10m
30m