Engineering Manual

B-26
7
CORRECTION FACTORS
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.
Unit: inch
It is irrelevant which unit is higher.
MAX. REFRIGERANT PIPING LENGTH & PIPE SIZE SELECTION
MXZ-2C20NA2
Operating Range
a
b
Outdoor
unit
Indoor
units
49 ft.
33 ft.
49 ft.
Max. height difference
Outdoor unit union diameter
For
Indoor unit A
Liquid 1/4
Gas 3/8
Indoor unit B
Liquid 1/4
Gas 3/8
Piping length each indoor unit (a, b) 82 ft. MAX.
Total piping length (a+b) 164 ft. MAX.
Bending point for each unit 25 MAX.
Total bending point 50 MAX.
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 6°FDB, 5°FWB