Engineering Manual

B-29
MXZ-5C42NA2
Operating Range
Refrigerant pipe diameter is different according to indoor unit to be connected. When using extension pipes, refer to the
tables below.
When diameter of refrigerant pipe is different from that of outdoor unit union, use optional Different-diameter pipe.
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 unit D
Liquid 1/4
Gas 3/8
Indoor unit E
Liquid 1/4
Gas 3/8
Piping length each indoor unit (a, b, c, d, e) 82 ft. MAX.
Total piping length (a+b+c+d+e) 262 ft. MAX.
Bending point for each unit 25 MAX.
Total bending point 80 MAX.
MAX. REFRIGERANT PIPING LENGTH & PIPE SIZE SELECTION
Unit : inch
a
b
e
c
d
Outdoor
unit
Indoor
units
49 ft.
49 ft.
49 ft.
Max. height difference
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
It is irrelevant which unit is higher.