Toshiba MMY-MUP0721FT6P-UL Service Manual page 122

Next, enter the total length for each liquid pipe diameter in the following table, and then calculate the additional
amount of refrigerant by pipe length.
Table 2. Additional amount of refrigerant based on the liquid pipe and length.
Pipe diameter on the
liquid side
1/4"
3/8"
1/2"
5/8"
3/4"
7/8"
Table A. Correction factor on indoor unit capacity type.
Connection rate Factor
Less than 135 %
135 % or more
Then refer to following table below, calculate corrective amount of refrigerant according to indoor unit
capacity (C).
Table 3. Correction factor on indoor unit capacity type
Table 3-1. Additional amount of refrigerant for standard indoor unit type
Indoor unit Capacity code
capacity type
007 7.5
009 9.5
012 12
015 15.4
018 18
021 21
024 24
027 27
030 30
036 36
042 42
048 48
054 54
072 72
096 96
※ If the outside air unit type (MMD-UP***1HFPUL) is connected, The additional amount refrigerant for outside air
unit type is 0 lbs.
Standard amount Total pipe length on
of refrigerant each liquid side
lbs/ft
0.017 ×
0.037 ×
0.071 ×
0.108 ×
0.168 ×
0.235 ×
1.3
1.2
Corrective amount
of refrigerant
lbs
0.44
0.88
1.32
2.20
Additional amount of refrigerant
pipe diameter on each liquid side
ft
=
=
=
=
=
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Number of connected Corrective amount of refrigerant
indoor units
Number
- 122 -
lbs
lbs
lbs
lbs
lbs
lbs
lbs
on each indoor unit capacity
lbs
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