4
Model Number Description
4
M
U
D
4
5
1
8
A
1
0
N
0
A
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Digit 1: Refrigerant
4 = R-410A
Digit 2: Brand name
M = Mini-split indoor unit
Digit 3: System type
U = Universal match heat pump
Digit 4: Configuration Type
D = Concealed ducted unit
Digit 5: Family
4 = Standard model
Digit 6: Connection type
5 = Flare
Digit 7, 8: Nominal capacity (Btu/h x 1,000)
18 = 18,000 Btu/h
36 = 36,000 Btu/h
24 = 24,000 Btu/h
42 = 42,000 Btu/h
30 = 30,000 Btu/h
48 = 48,000 Btu/h
Digit 9: Major development sequence
A = First development sequence
Digit 10: Electric power supply characteristics
1 = 208–230/60/1
Digit 11: Reserved for future use
0 = Not currently used
Digit 12: Region of sale
N = North America (UL or ETL)
Dig
it 13: Reserved for future use
0 = Not currently used
Digit 14: Minor design sequence
A = First design sequence
