Friedrich J Serie Manual De Instalación página 36

Charging
Distributor type Models
Additional charge (oz) = (( Total Main piping Length - Main Standard Length ) x 0.55
h CF = Max. number of connectable indoor unit – Total number of connected indoor unit
Ex) MR48DEY3JM
A
A
C
B
h If the total additional charge value after calculation comes out to be negative, then do not consider
additional charge.
36
+ (A Room Branch Length – Standard Length ) x 0.22
+ (B Room Branch Length – Standard Length ) x 0.22
+ (C Room Branch Length – Standard Length ) x 0.22 +.. )
- CF(Correction Factor) x 3.53
a b c
18k 9k 9k
e
d
18k
9k
• Total main pipe(A+B+C)=98ft
• Each branch pipe
a=33ft
b=26ft
c=16.4ft
d=10ft
e=33ft
v Additional Charge
= ((98-16.4)×0.55 + (33-16.4)×0.22
+ (26-16.4)×0.22 + (16.4-16.4)×0.22
+ (10-16.4)×0.22 + (33-16.4)×0.22)
- (8-5)×3.53 = 42.3oz