Multiple Outdoor Units: Knockout Holes; Using The Stop Valve And Service Port - Daikin VRV 5 RXYA8A7Y1B Installer And User Manual

18.2.3 Multiple outdoor units: Knockout holes

18.2.4 Using the stop valve and service port

To handle the stop valve
RYMA5+RXYA8~20A7Y1B
VRV 5 heat pump
4P749918-1 – 2023.12
NOTICE
Take the following precautions on refrigerant piping into account:
▪
Avoid anything but the designated refrigerant to get mixed into the refrigerant
cycle (e.g. air).
▪
Only use R32 when adding refrigerant.
▪
Only use installation tools (e.g. manifold gauge set) that are exclusively used for
R32 installations to withstand the pressure and to prevent foreign materials (e.g.
mineral oils and moisture) from mixing into the system.
▪
Protect the piping as described in the following table to prevent dirt, liquid or
dust from entering the piping.
▪
Use caution when passing copper tubes through walls.
Unit
Outdoor unit >1 month
<1 month
Indoor unit Regardless of the period
NOTICE
Do NOT open the refrigerant stop valve before checking the refrigerant piping. When
you need to charge additional refrigerant it is recommended to open the refrigerant
stop valve after charging.
NOTICE
Bending radius of field piping should be ≥2.5× the outer diameter.
Connection
Front connection
Bottom connection
Take the following guidelines into account:
Installation period
Description
Remove the front plate knockout holes to connect.
Remove the knockout holes on the bottom frame and
route the piping under the bottom.
18 Piping installation
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Protection method
Pinch the pipe
Pinch or tape the pipe
Installer and user reference guide
103