Toshiba MMY-MUP0721HT9P-UL Service Manual page 101

• Check the additional amount of refrigerant.
Checklist 2
Calculate total additional amount refrigerant from the compensation amount of refrigerant according to total
outdoor unit capacity (A), the additional amount of refrigerant by the pipe diameter on the liquid side and the
pipe length (B),the compensation amount of refrigerant according to indoor unit capacity (C), and the total
compensation amount of refrigerant according to the system diversity (D)
Additional amount
=
of refrigerant
+
First, refer to following table below, calculate the the compensation amount of refrigerant according to
total outdoor unit capacity (A)
<Compensation amount of refrigerant according to total outdoor unit capacity (A)>
Standard
Outdoor unit
capacity type
072
096
120
144
168
192
216
240
264
288
312
336
360
384
408
432
456
480
High heat
Outdoor unit
capacity type
072
096
120
144
192
240
288
360
Compensation amount of refrigerant
according to total outdoor unit capacity
(A)
Compensation amount of refrigerant
according to indoor unit capacity
(C)
Combination outdoor units
Unit 1 Unit 2
072 -
096 -
120 -
144 -
168 -
096 096
144 072
144 096
168 096
144 144
168 144
168 168
168 096
144 144
168 144
168 168
168 168
168 168
Combination outdoor units
Unit 1 Unit 2
072 -
096 -
120 -
072 072
096 096
120 120
096 096
120 120
Actual liquid pipe length × Additional amount
+
of refrigerant per 1 ft of liquid pipe
Compensation amount of refrigerant
+
according to the system diversity
Compensation by outdoor unit capacity type
Unit 3 lbs
- 2.20
- 2.64
- -1.10
- 0.33
- 6.16
- 5.28
- 2.53
- 2.97
- 8.80
- 0.66
- 6.49
- 12.32
096 11.44
096 3.30
096 9.13
096 14.96
120 11.22
144 12.65
Compensation by outdoor unit capacity type
Unit 3 lbs
- -2.20
- -1.65
- 3.30
- -4.40
- -3.30
- 6.60
096 -4.95
120 9.90
- 101 -
(B)
(D)
kg
1.00
1.20
-0.50
0.15
2.80
2.40
1.15
1.35
4.00
0.30
2.95
5.60
5.20
1.50
4.15
6.80
5.10
5.75
kg
-1.00
-0.75
1.50
-2.00
-1.50
3.00
-2.25
4.50