SCM CUBO2 AQUA, Руководство пользователя

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EN
OEM Manual – CUBO
2
AQUA
Pag. 8-EN UMT/WG T MT Rev3.0 – 08/10/2021
8
5 Piping details
5.1 Pipe Connections (Multi-Split)
The connection between the Condensing Unit and more remote evaporators can be the same one used
for Multi-Split or branch system.
The preferred one is the one is able to guarantee the highest gas velocity in the suction line (for a good
oil return) with a low pressure drop.
For Multi-Split layout, the system requires a dedicated suction line for each evaporator that will
be collected by a manifold installed close to the condensing unit. Please refer to the example
reported in the below pictures.
Multi-Split Branch

For Multi-Split system the collector must be properly sized and installed in a horizontal
position

SCM Frigo recommends connection with up to 3 remote evaporators, and maximum
suction pipe length of 20 meters to each evaporator.

Liquid line must be properly sized to supply the farther evaporators (liquid velocity < 1 m/s is
suggested).

Suction line must be properly sized to have a good oil return with a low pressure drop (gas velocity
from 3 to 8 m/s are suggested).

The condensing unit connection sizes are not necessarily the correct size for the installed pipe
network and should be sized for each installation to ensure acceptable penalties and velocities.
5.2 Oil traps

If UMTT and evaporator are installed at different heights, it is necessary to create piping oil traps.
The installation of an oil-trap is recommended (one oil-trap every 2/3 meters of difference in
height)