Mitsubishi Electric MXZ-2D33VA Service Manual page 52

MXZ-2D42VA MXZ-2D53VA MXZ-2D53VAH
R.V. coil
Refrigerant flow in cooling
OFF
ON Refrigerant flow in heating
Indoor unit
B
Stop valve
(with service port)
Indoor unit
A
Stop valve
(with service port)
Indoor unit
A
Indoor unit
B
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)
WHEN CONNECTING TO MFZ-KJ SERIES INDOOR UNIT
MXZ-2D42VA - /
E2 ET2
MXZ-2D53VA - /
E2 ER2
MXZ-2D53VAH -
E2
No. of
MFZ-KJ
indoor units
None Charge-less (1,300 g)
1 unit 100 g additional charge (1,400 g)
2 units 200 g additional charge (1,500 g)
Refrigerant pipe diameter is different according to indoor unit to be
connected. When using extension pipes, refer to the right table.
OBH626F
Capillary tube
LEV A
Stop valve
(with strainer #100)
Capillary tube
LEV B
Stop valve
(with strainer #100)
20 m
30 m
20 m 30 m
0 200
/
ET2
/
ER2
Refrigerant piping length (L)
~ 20 m
100 g + (L-20) x 20 g/m
200 g + (L-20) x 20 g/m
Compressor
Discharge
temperature
thermistor RT62
Muffler
4-way valve
Sub muffler
Indoor
units
20
30
Maximum amount
~ 30 m
(L-20) x 20 g/m
52
Outdoor heat
exchanger
temperature
thermistor
RT68
Strainer
#100
Distributor
a
Outdoor
unit
b
of refrigerant
1,500 g
1,600 g
1,700 g
UNIT: mm (inch)
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
6.35(1/4)
9.52(3/8)
6.35(1/4)
9.52(3/8)