Design and Technical Manual

6. SYSTEM DESIGN
ADDITIONAL CHARGE CALCULATION2-5.
The outdoor unit is charged refrigerant at the factory. ●
Additional refrigerant required to be charged on site depending on pipe length. ●
The additional refrigerant charge amount is calculated according to the following formula. ●
Round up the calculated result to two decimal places. ●
CALCULATION OF ADDITIONAL CHARGE REFRIGERANT

Diameter of liquid
pipe
unit: in. (mm)
Additional amount for
pipe length
unit: oz./ft. (g/m)
ø1/4 (6.35) 0.224 (21)
ø3/8 (9.52) 0.624 (58)
Calculation of additional amount for pipe length
z
Total
length of
ø3/8in.
(9.52mm)
liquid pipe
x 0.624
oz./ft.
(58g/m)
ft (m)
oz. (g)
Total
length of
ø1/4in.
(6.35mm)
liquid pipe
x 0.224
oz./ft.
(21g/m)
ft (m)
oz. (g)
+ = =
Total
oz. (g)
Total
lbs (kg)
- (06 - 17) -
SYSTEM DESIGN SYSTEM DESIGN