Toshiba MMY-MUP0721FT6P-UL Service Manual page 121

Checklist 2
• Check the additional amount of refrigerant.
Additional amount of refrigerant charge at site = [1] + [2] x [A] + [3] + [4]
［1］.Additional amount of refrigerant based on the outdoor unit capacity type (Table 1-1,1-2)
［2］.Additional amount of refrigerant based on the liquid pipe diameter and length.
Real length of liquid pipe × Additional amount of refrigerant charge per liquid pip length 1 ft and 1m. (Table 2)
［A］.Correction factor based on the indoor unit connection capacity. (Table A)
［3］.Additional amount of refrigerant based on the indoor unit capacity type and number. (Table 3-1,3-2,3-3,3-4)
［4］.Refrigerant amount adjustment based on the indoor unit connection capacity.(Table4)
Table 1. Additional amount of refrigerant based on the outdoor unit capacity type.
Table 1-1. Standard model
Outdoor unit
capacity type
6ton 072
8ton 096
10ton 120
12ton 144
14ton 168
16ton 192
16ton 192
18ton 216
20ton 240
22ton 264
24ton 288
26ton 312
28ton 336
30tton 360
32ton 384
34ton 408
36ton 432
38ton 456
40ton 480
42ton 504
Table 1-2. High heat model
Outdoor unit
capacity type
6ton 072
8ton 096
10ton 120
12ton 144
16ton 192
20ton 240
24ton 288
30ton 360
Combination outdoor units
Unit1 Unit2 Unit3
－ －
072
－ －
096
－ －
120
－ －
144
－ －
168
－ －
192
－
096 096
－
144 072
－
144 096
－
168 096
－
144 144
－
168 144
－
168 168
168 096 096
144 144 096
168 144 096
168 168 096
168 144 144
168 168 144
168 168 168
Combination outdoor units
Unit1 Unit2 Unit3
－ －
072
－ －
096
－ －
120
－
072 072
－
096 096
－
120 120
096 096 096
120 120 120
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Amount of additional Amount of additional
refrigerant(lbs) refrigerant(kg)
2.2
2.2
0.0
2.2
4.4
5.5
4.4
4.4
4.4
6.6
4.4
6.6
8.8
8.8
6.6
8.8
11.0
8.8
11.0
13.2
Amount of additional Amount of additional
refrigerant(lbs) refrigerant(kg)
2.2
2.2
6.6
4.4
4.4
13.2
6.6
19.8
1.0
1.0
0.0
1.0
2.0
2.5
2.0
2.0
2.0
3.0
2.0
3.0
4.0
4.0
3.0
4.0
5.0
4.0
5.0
6.0
1.0
1.0
3.0
2.0
2.0
6.0
3.0
9.0