Vacuum Pumping, Refrigerant Adding - Gree FGR50Pd/DNa-M Owner's Manual

The permitted maximum value of each case:
Height difference between the indoor and outdoor unit
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.
During engineering installation, the connection pipe inside the unit must be wrapped by
insulation sleeve.

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.
(3) Use vacuum pump to withdraw the air inside indoor unit and connection pipe from the
outdoor valve, as shown below.
3.4.2 Refrigerant Adding
(1) Refrigerant quantity of outdoor unit before delivery:
Model
Refrigerant Qty (kg)
NOTES!
① The refrigerant amount charged before delivery doesn't include the amount that
needs to be added to indoor units and the connection pipeline.
Number of bends
Length of connecting pipes
Fig.18
FGR25Pd/DNa-M(O)
8.00
10
Ducted Type Split Air-Conditioner Units(Inverter Series)
FGR30Pd/DNa-M(O)
＜ 30m
＜ 12
＜ 70m
9.50