Check The Additional Amount Of Refrigerant; Additional Amount Of Refrigerant By Pipe Length - Toshiba MMY-MAP0804HT8-E Service Manual

• 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
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>
Pipe diameter on the liquid
side
Ø6.4
Ø9.5
Ø12.7
Ø15.9
Ø19.0
Ø22.2
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>
Standard type
High Efficiency type
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>
Additional amount of refrigerant by pipe length (A)
Corrective amount of refrigerant according to combined horsepower (C)
Additional amount of refrigerant
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Actual liquid pipe length × Additional amount
=
of refrigerant per 1 m of liquid pipe
Standard amount of
refrigerant
kg/m
0.025 ×
0.055 ×
0.105 ×
0.160 ×
0.250 ×
0.350 ×
Additional amount of refrigerant by pipe length (A)
Combined HP (HP)
8 8HP
10 10HP
12 12HP
14 14HP
16 16HP
18 10HP
20 10HP
22 12HP
24 12HP
26 16HP
28 16HP
30 16HP
32 16HP
34 12HP
36 12HP
38 16HP
40 16HP
42 16HP
44 16HP
46 16HP
48 16HP
16 8HP
24 8HP
26 10HP
28 10HP
30 10HP
32 8HP
34 10HP
36 10HP
38 10HP
40 10HP
42 12HP
44 12HP
46 12HP
48 12HP
manuals search engine
+
(A)
Total pipe length on each liquid side
m
=
=
=
=
=
=
Combined outdoor units (HP)
– –
– –
– –
– –
– –
8HP –
10HP –
10HP –
12HP –
10HP –
12HP –
14HP –
16HP –
12HP 10HP
12HP 12HP
12HP 10HP
12HP 12HP
14HP 12HP
16HP 12HP
16HP 14HP
16HP 16HP
8HP –
8HP 8HP
8HP 8HP
10HP 8HP
10HP 10HP
8HP 8HP 8HP
8HP 8HP 8HP
10HP 8HP 8HP
10HP 10HP 8HP
10HP 10HP 10HP
10HP 10HP 10HP
12HP 10HP 10HP
12HP 12HP 10HP
12HP 12HP 12HP
kg
kg
kg
122
Corrective amount of refrigerant
according to system horsepower
(C)
Additional amount of refrigerant pipe diameter on
each liquid side
kg
C (Corrective amount of refrigerant) (kg)
– 1.5
– 2.5
– 3.5
– 8.5
– 10.5
– 0.0
– 3.0
– 5.0
– 7.5
– 8.5
– 9.5
– 11.5
– 12.5
– 3.0
– 4.0
– 6.0
– 7.0
– 8.0
– 10.0
– 12.0
– 14.0
– 0.0
– -4.0
– -4.0
– -2.0
– 0.0
-6.0
-6.0
-6.0
-6.0
-5.0
-4.0
-2.0
0.0
2.0
kg
kg
kg
kg
kg
kg
kg