Max Refrigerant Piping Length; Additional Refrigerant Charge - Mitsubishi Electric MXZ-2D33VA Service Manual

MXZ-2D40VA
Refrigerant flow in cooling
Refrigerant flow in heating
Indoor unit
B
Stop valve
(with service port)
Indoor unit
A
Stop valve
(with service port)
Indoor unit
A
(with strainer #100)
Indoor unit
B
(with strainer #100)

MAX REFRIGERANT PIPING LENGTH

Piping length each indoor unit (a, b)
Total piping length (a+b)
Bending point for each unit
Total bending point
It is irrelevant which unit is higher.

ADDITIONAL REFRIGERANT CHARGE

Outdoor unit
Refrigerant piping length (one way, 2 unit total)
precharged
(g)
1,300
Calculation : Xg = 20 g/m x (Refrigerant piping length (m) - 20)
Refrigerant pipe diameter is different according to indoor unit to be connected. When using extension pipes, refer to the
table below.
OBH626F
Sub muffler
Capillary tube
LEV A
Stop valve
Capillary tube
LEV B
Stop valve
20 m
0
Compressor
Discharge
temperature
thermistor RT62
Muffler
4-way valve
Indoor
units
20 m
30 m
20
30
30 m
200
51
Outdoor heat
exchanger
temperature
thermistor
RT68
Strainer
#100
Distributor
a
Outdoor
unit
b
Outdoor unit union diameter
For
Liquid
Indoor unit A
Gas
Liquid
Indoor unit B
Gas
UNIT: mm
FAN-OUT
Ambient
temperature
thermistor
RT65
Defrost
thermistor
RT61
Capillary tube
Max.
Height
difference
15 m
15 m
10 m
UNIT: mm (inch)
6.35(1/4)
9.52(3/8)
6.35(1/4)
9.52(3/8)