Toshiba RBC-TWP101E Manuel D'installation page 9

Branch Kit 1:2
<RAV-SM2246AT8, SM2806AT8 series>
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.
Additional refrigerant amount (kg) = Main piping additional refrigerant amount (kg) +
A: Additional refrigerant amount per meter of actual main piping length (kg)
B: Additional refrigerant amount per meter of actual branch piping length (kg)
L: Actual length of main piping (m)
a, b: Actual length of branch piping (m)
SM224
SM280
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 B
Outdoor unit
Branch piping additional refrigerant amount (kg)
= A × (L – 28) + B × (a + b – 4)
Standard piping length
Main piping Branch piping
28 m
Indoor unit A
b a
Branch Branch
piping piping
L
Main piping
amount per Meter (kg/m)
2 m 0.090
8
Additional refrigerant
A B
0.045
EN
EN