Mitsubishi Electric MXZ-2D33VA-E1 Service Manual page 27

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 E3
MXZ-2D53VA - /
E2 E3
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.
When 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".
OBH626H
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
/ / /
ER3 ET2 ET3
/ / / /
ER2 ER3 ET2 ET3
/ / /
E3 ER2 ER3
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
73
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)