Installation Space Requirement; Refrigerant Pipe Connection; Vacuum Pumping, Refrigerant Adding - Gree FGR40Pd/D2Na-XI Manuel D'utilisateur

The Ducted Split Type Air-Conditioning Units(Inverter Series) Installation and Operation Manual

3.2 Installation space requirement

If all sides of the ODU (including the top) are surrounded by walls, process according to the
following requirements for installation space:

3.3 Refrigerant pipe connection

Note: Do not loosen the cap of the pipes when connecting the pipes between the indoor unit
and the outdoor unit. Connecting the pipes as soon as possible after loosening the cap of the
pipes to avoid the entering of water and dusk. A metal pipe should be utilized if a pipe should be
installed through a wall.
The connection of the pipes should confirm to the following principles:
Make sure to lessen the length of connecting pipe, the height difference between the indoor
and outdoor unit, and the number of bends, and enlarge the diameter of bends.
The permitted maximum value of each case:
The pipe meld type could be employed for the connection of the pipes between the indoor
and outdoor units.
The pipe joint should be tightly connected when a pipe joint is employed between two pipes.
It is better to use only one connecting pipe if the distance is not far.
The pipes should not be shriveled when the pipes are connecting. The bend diameter
should be longer than 200 millimeter. The connecting pipes should not be extended or curved
frequently and the curving process should not be larger than 3 times in the same bending
position.

3.4 Vacuum Pumping, Refrigerant Adding

3.4.1 Vacuum Pumping
(1) Outdoor unit has been charged with refrigerant before delivery. Field-installed connection
pipe needs to be charged with additional refrigerant.
(2) Confirm whether outdoor liquid and gas valves are closed.
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Height difference between the indoor and outdoor unit
Number of bends
Length of connecting pipes
10
＜30M
＜12
＜50M