Daikin VRV III REMQ72PBYD Engineering Data page 75

EDUS391004-N
CAUTION
After removing the gas, remove the pinch piping.
Any gas remaining inside may blow off the pinch piping when you
dissolve the brazing, causing damage.
(Refer to figure 11)
1. Pinch piping (3 pieces)
2. Do not remove the relay piping.
3. Pinch piping
4. Procedure 1 : Confirm the shutoff valve is closed.
5. Procedure 2 : Connect a charge hose to the service port
of shutoff valve and remove the gas in the pinch piping.
6. Procedure 3 : After removing the gas in the pinch piping,
dissolve the brazing using a burner and remove the pinch
piping.
3.
Connecting refrigerant piping to outdoor units
• Figure 12 shows the example of connecting refrigerant piping to
outdoor units.
• The local inter unit piping next accessory pipes are field supplied.
(Refer to figure 12)
1. When connected to the front
2. When connected at lateral side (bottom)
3. Remove the shutoff valve cover to connect.
4. Remove the knock hole on the bottom frame and route
the piping under the bottom frame.
5. Liquid pipe shutoff valve
6. Suction gas pipe shutoff valve
7. HP/LP gas pipe shutoff valve
8. Brazing
9. Liquid side accessory pipe (1)
10. Suction gas side accessory pipe (1)
11. HP/LP gas side accessory pipe (1)
12. L type accessory joint (1)
13. L type accessory joint (2)
14. Liquid side accessory pipe (2)
15. Suction gas side accessory pipe (2)
16. HP/LP gas side accessory pipe (2)
17. In case of 72P type use the Accessory joint for connecting
the Suction gas side accessory pipe (2) to Suction gas
side shutoff valve.
18. Accessory joint
NOTE
• Make sure the onsite piping does not come into contact with other
piping or the bottom frame or side panels of the unit.
4.
Branching the refrigerant piping
Heed the restrictions below when installing the refrigerant
branching kit and read the installation instruction manual with the
kit.
(Improper installation could lead to malfunctioning or breakdown of
the outdoor unit.)
<REFNET joint>
Install the REFNET joint so it splits horizontally or vertically.
(Refer to figure 13)
1. Horizontal
2. A-arrow view
3. Horizontal surface
4. ±30° or less
5. Vertical
<REFNET header>
Install the REFNET header so it splits horizontally.
(Refer to figure 14)
1. Horizontal surface
2. B-arrow view
Installation of Outdoor Units
Installation
3P215731-12R
75