MULTI TYPE

• Check the additional amount of refrigerant.
Checklist 2
Calculate the additional amount of refrigerant from the additional amount of refrigerant (A) by the pipe diameter on
the liquid side, the pipe length to be connected, and the corrective amount of refrigerant (C) according to system
horsepower.
Additional amount
of refrigerant
=
Actual liquid pipe length × Additional amount
of refrigerant per 1 m of liquid pipe
+
Corrective amount of refrigerant
according to system horsepower
First, enter the total length for each liquid pipe diameter in the following table, and then calculate the additional
amount of refrigerant by pipe length.
Pipe diameter on the liquid
side
Standard amount of
refrigerant
kg/m
Total pipe length on each liquid side
m
Next, refer to the following table for the corrective amount of refrigerant (C) according to system horsepower.
Lastly, add the additional amount of refrigerant by pipe length (A) to the corrective amount of refrigerant by
combined horsepower (C). This is the final additional amount of refrigerant.
If a minus sign is indicated as the result, do not add the refrigerant (= 0 kg).
122
Additional amount of refrigerant pipe diameter on
each liquid side
kg
Ø6.4 0.025 × = kg
Ø9.5 0.055 × = kg
Ø12.7 0.105 × = kg
Ø15.9 0.160 × = kg
Ø19.0 0.250 × = kg
Ø22.2 0.350 × = kg
Additional amount of refrigerant by pipe length (A) kg
Standard type
High Efficiency type
Combined HP (HP) Combined outdoor units (HP) C (Corrective amount of refrigerant) (kg)
8 8HP – – – 1.5
10 10HP – – – 2.5
12 12HP – – – 3.5
14 14HP – – – 8.5
16 16HP – – – 10.5
18 10HP 8HP – – 0.0
20 10HP 10HP – – 3.0
22 12HP 10HP – – 5.0
24 12HP 12HP – – 7.5
26 16HP 10HP – – 8.5
28 16HP 12HP – – 9.5
30 16HP 14HP – – 11.5
32 16HP 16HP – – 12.5
34 12HP 12HP 10HP – 3.0
36 12HP 12HP 12HP – 4.0
38 16HP 12HP 10HP – 6.0
40 16HP 12HP 12HP – 7.0
42 16HP 14HP 12HP – 8.0
44 16HP 16HP 12HP – 10.0
46 16HP 16HP 14HP – 12.0
48 16HP 16HP 16HP – 14.0
16 8HP 8HP – – 0.0
24 8HP 8HP 8HP – -4.0
26 10HP 8HP 8HP – -4.0
28 10HP 10HP 8HP – -2.0
30 10HP 10HP 10HP – 0.0
32 8HP 8HP 8HP 8HP -6.0
34 10HP 8HP 8HP 8HP -6.0
36 10HP 10HP 8HP 8HP -6.0
38 10HP 10HP 10HP 8HP -6.0
40 10HP 10HP 10HP 10HP -5.0
42 12HP 10HP 10HP 10HP -4.0
44 12HP 12HP 10HP 10HP -2.0
46 12HP 12HP 12HP 10HP 0.0
48 12HP 12HP 12HP 12HP 2.0
Additional amount of refrigerant by pipe length (A) kg
Corrective amount of refrigerant according to combined horsepower (C) kg
Additional amount of refrigerant kg
(A)
(C)