18
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Piping installation
Installer and user reference guide
92
REMA5+REYA8~20A7Y1B
VRV 5 heat recovery
4P687640-1 – 2022.07
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
Installation period
Protection method
Outdoor unit
>1 month
Pinch the pipe
<1 month
Pinch or tape the pipe
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.
18.2.3 Multiple outdoor units: Knockout holes
Connection
Description
Front connection
Remove the front plate knockout holes to connect.
Bottom connection
Remove the knockout holes on the bottom frame and
route the piping under the bottom.
18.2.4 To route the refrigerant piping
Installation of refrigerant piping is possible as front connection or side connection
(when taken out from the bottom) as shown in the figure below.
