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Refrigerant pipe diameter is different according to indoor unit to be connected. When using extension pipes, refer to the
tables below.
When the diameter of refrigerant pipe is different from that of outdoor unit union, use optional Different-diameter pipe.
For further information on Different-diameter pipe, refer to "PARTS CATALOG".
Unit: inch
Piping length each indoor unit (a, b, c) 82 ft. MAX.
Total piping length (a+b+c) 230 ft. MAX.
Bending point for each unit 25 MAX.
Total bending point 70 MAX.
It is irrelevant which unit is higher.
MAX. REFRIGERANT PIPING LENGTH & PIPE SIZE SELECTION
NTXMPH24A132AA NTXMPH30A132AA
Operating Range NTXMPH24A132AA NTXMPH30A132AA
a
b
Outdoor
unit
Indoor
units
Max. height difference
49 ft.
49 ft.
c
49 ft.
Outdoor unit union diameter
For
Indoor unit A
Liquid 1/4
Gas 1/2
Indoor unit B
Liquid 1/4
Gas 3/8
Indoor unit C
Liquid 1/4
Gas 3/8
Indoor intake air temperature Outdoor intake air temperature
Cooling
Maximum 95°FDB, 71°FWB 115°FDB
Minimum 67°FDB, 57°FWB 14°FDB
Heating
Maximum 80°FDB, 67°FWB 75°FDB, 65°FWB
Minimum 70°FDB, 60°FWB -12°FDB, -13°FWB
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