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• 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.
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.
<Additional amount of refrigerant by pipe length>
Next, refer to the following table for the corrective amount of refrigerant (C) according to system horsepower.
<Corrective amount of refrigerant 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).
<Additional amount of refrigerant>
Pipe diameter on the liquid
side
Standard amount of
refrigerant
kg/m
Total pipe length on each liquid side
m
Additional amount of refrigerant pipe diameter on
each liquid side
kg
= × 520.04.6Ø kg
=
× 550.05.9Ø kg
= × 501.07.21Ø kg
= × 061.09.51Ø kg
=
× 052.00.91Ø kg
=
× 053.02.22Ø kg
Additional amount of refrigerant by pipe length (A) kg
Combined HP (HP) Combined outdoor units (HP) C (Corrective amount of refrigerant) (kg)
Standard type
5.1–––PH88
5.2–––PH0101
5.3–––PH2121
5.8–––PH4141
5.01–––PH6161
0.0––PH8PH0181
0.3––PH01PH0102
0.5––PH01PH2
122
5.7––PH21PH2142
5.8––PH01PH6162
5.9––PH21PH6182
5.11––PH41PH6103
5.21––PH61PH6123
0.3–PH01PH21PH2143
0.4
–PH21PH21PH2163
0.6–PH01PH21PH6183
0.7–PH21PH21PH6104
0.8–PH21PH41PH6124
0.01–PH21PH61PH6144
0.21–PH41PH61
PH6164
0.41–PH61PH61PH6184
High Efficiency type
0.0––PH8PH861
0.4-–PH8PH8PH842
0.4-–PH8PH8PH0162
0.2-–PH8PH01PH0182
0.0–PH01PH0
1PH0103
0.6-PH8PH8PH8PH823
0.6-PH8PH8PH8PH0143
0.6-PH8PH8PH01PH0163
0.6-PH8PH01PH01PH0183
0.5-PH01PH01PH01
PH0104
0.4-PH01PH01PH01PH2124
0.2-PH01PH01PH21PH2144
0.0PH01PH21PH21PH2164
0.2PH21PH21PH21PH2184
gk
)A( htgnel epip yb tnaregirfer fo tnuoma lanoitiddA
Corrective amount of refrigerant according to combined horsepower (C) kg
gk
tnaregirfer fo tnuoma lanoitiddA
Corrective amount of refrigerant
according to system horsepower
Additional amount
of refrigerant
=
)C()A(
+
Actual liquid pipe length × Additional amount
of refrigerant per 1 m of liquid pipe
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