18
Table 2 . Piston size for system combination.
Table1. Factory installed piston size for each model.
Model
50
52
56
58
63
65
68
70
73
75
76
83
90
J4AH4E24A1A00AA
X
J4AH4E36A1B00AA
X
J4AH4E60A1C00AA
X
Outdoor Unit Model
Indoor Unit Model
Piston Size
J4HP4018A1
0.050
J4AC4018A1
0.052
J4AC4024A1
0.058
J4HP4024A1
0.058
J4HP4024A1
0.0
58
J4HP4030A1
0.0
65
J4AC4030A1
0.0
65
J4AC4036A1
0.0
73
J4HP4036A1
0.073
J4AC4036A1
0.073
J4HP4042A1
0.07
5
J4AC4042A1
0.075
J4HP4048A1
0.0
83
J4HP4060A1
0.090
J4AH4E24A1A00A
050 factory installed
J4AH4E36A1B00A
068 factory installed
J4AH4E60A1C00A
090 factory installed
This coil comes with a factory installed piston metering device. See Table 1 for factory installed piston
size. Some system combinations will require a different sized piston to be field installed.
Contact your local parts center to order the appropriate MAYORIACHP piston kit for your system
combination.
Use Table 3 for TXV kit part numbers.
A TXV may be required to achieve minimum efficiency ratings or for long refrigerant line set
applications. Reference AHRI for system combination ratings.
Reference Table 4 to charge the system by superheat when using a piston. Reference the outdoor unit
installation guide to change the system by subcooling when using a TXV.
X
J4AH6E60A1C00AA
J4AH6E60A1C00A
090 factory installed
J4HP6060A1
0.090
