Additional Amount Of Refrigerant By Pipe Length; Corrective Amount Of Refrigerant By System Capacity; Additional Amount Of Refrigerant - Toshiba Super MMU-AP0091H Service Manual

• Check the additional amount of refrigerant.
<Check list 2>
Calculate the additional amount of refrigerant from the additional amount of refrigerant (A) by the pipe diam-
eter at liquid side and the pipe length to be connected and the corrective amount of refrigerant (C) by the
system capacity.
Additional amount
of refrigerant
Firstly enter the total length for each liquid pipe in the following table, and then calculate the additional amount
of refrigerant by pipe length.
<Additional amount of refrigerant by pipe length>
Pipe dia at Standard amount of refrigerant
liquid side
Ø6.4 0.025 ×
Ø9.5 0.055 ×
Ø12.7 0.105 ×
Ø15.9 0.160 ×
Ø19.0 0.250 ×
Ø22.2 0.3505 ×
Next, refer to the following table for the corrective amount of refrigerant (C) by system capacity.
<Corrective amount of refrigerant by system capacity>
System horse
power HP Unit Unit
1 2
5 5
6 6
8 8
10 10
12 12
14 8 6
16 8 8
18 10 8
20 10 10
22 8 8
22 12 10
24 8 8
24 12 12
26 10 8
Lastly add the additional amount of refrigerant by pipe length (A) to the corrective amount of refrigerant by
system capacity (C). It is the final additional amount of refrigerant.
As the result, If minus sign is indicated, do not add the refrigerant (=0kg).
<Additional amount of refrigerant>
Additional amount of refrigerant by pipe length (A)
Corrective amount of refrigerant by system HP (C)

Additional amount of refrigerant

Actual liquid Additional amount of
= ×
pipe length refrigerant per liquid pipe 1m
Total pipe length at each liquid side
kg/m
Additional amount of refrigerant by pipe
length (A)
Normal type
Unit Unit Corrective amount
3 4 of refrigerant (C) kg
0
0
1.5
2.5
3.5
0
0
0
3.0
6 0
5.0
8 –4.0
7.0
8 –4.0
(A)
=
=
=
=
=
=
System horse
power HP Unit
1
28 10
30 10
32 8
32 12
34 10
34 12
36 10
36 12
38 10
40 10
42 12
44 12
46 12
48 12
kg
kg
kg
91
Corrective amount of
+
refrigerant by system capacity
(C)
Additional amount of refrigerant pipe
dia at each liquid side kg
Normal type
Unit Unit Unit Corrective amount
2 3 4 of refrigerant (C) kg
10 8
10 10
8 8 8
10 10
8 8 8
12 10
10 8 8
12 12
10 10 8
10 10 10
10 10 10
12 10 10
12 12 10
12 12 12
kg
kg
kg
kg
kg
kg
kg
–2.0
0
–6.0
1.0
–6.0
3.0
–6.0
4.0
–6.0
–5.0
–4.0
–2.0
0
2.0