Toshiba RBC-DTWP101E Manuel D'installation page 11

Branch Kit Set 1:4
<RAV-GM224*AT8, GM280*AT8 series>
Outdoor unit
Formula for Calculating Additional Refrigerant Amount
Do not remove the refrigerant even if the additional refrigerant amount becomes minus
result as a result of calculations by the following formula and operate the air conditioner as it
is.
Outdoor unit
GM224 Ø12.7
GM280 Ø12.7
Outdoor unit
GM224
GM280
CAUTION
1. Be certain to write the additional refrigerant amount, pipe length (actual length), head
and other specification on the nameplate put on the outdoor unit for recording.
2. Seal the correct amount of additional refrigerant in the system.
Indoor unit
Indoor unit
4
1
Diameter of connecting pipe
(liquid side)
1 2, 3
Ø9.5
Ø9.5
Amount of additional refrigerant (g) =
Amount of refrigerant added for main pipe +
amount of refrigerant added for first branch piping +
amount of refrigerant added for second branch piping
α × ( 1 – 28) + β × ( 2 + 3 – 4) + γ × ( 4 + 5 + 6 + 7)
α × ( 1 – 28) + β × ( 2 + 3 – 4) + γ × ( 4 + 5 + 6 + 7)
Indoor unit
5 6
2 3
Amount of additional refrigerant
α
4 to 7
Ø6.4 80
Ø9.5 80
10
Indoor unit
7
per meter (g/m)
β γ
40 20
40 40
EN
EN