3. Installation of outdoor unit
55
_ Heat pump
50Hz/R410A
Part 3 Design and installation
BD
BD
a
b
c
18k
9k
7k
d
e
9k
18k
Ex) A8UW48GFA0 [FM48AH U32]
• Total main pipe(A+B+C) = 20m
• Each branch pipe
a = 15m
b = 5m
c = 5m
d = 3m
e = 7m
❖
Additional Charge
= (20-5) x 50
+ (15-5) x 20
+ (5-5) x 20
+ (5-5) x 20
+ (3-5) x 20
+ (7-5)
– (8-5) x 100
x 20
= 750+200+0+0+0+50-300 = 700g
A
B
C
Additional refrigerant charge calculation example - 2
• Each branch pipe
a = 5m
b = 10m
c = 15m
d = 25m
❖
Additional Charge
= (5-7.5) x 20
+ (10-7.5) x 20
+ (15-7.5) x 20
+ (25-7.5) x 20
– (5-4) x 150
= 0+50+150+350-150 = 400g
a
b
c
d
5k
7k
9k
12k
Ex) A5UW30GFA0[MU5M30 U42]
Additional refrigerant charge calculation example - 1
