Mitsubishi Electric MXZ-4E72VA-E1 Service Manual page 58

MXZ-4E72VA
R.V. coil
Refrigerant flow in cooling
OFF
ON Refrigerant flow in heating
Indoor unit
D
Indoor unit
C
Indoor unit
B
Indoor unit
A
Indoor unit
A
Strainer
#100
Indoor unit
B
Strainer
#100
Indoor unit
C
Strainer
#100
Indoor unit
D
Strainer
#100
MAX REFRIGERANT PIPING LENGTH
Piping length each indoor unit (a, b, c, d)
Total piping length (a+b+c+d)
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, 4 units total)
precharged
40 m
(g)
2,700 0
Calculation : Xg = 20 g/m x (Refrigerant piping length (m) - 40)
WHEN CONNECTING TO MFZ-KJ SERIES INDOOR UNIT
MXZ-4E72VA
No. of
MFZ-KJ
indoor units
None Charge-less (2,700 g)
1 unit 100 g additional charge (2,800 g)
2 units 200 g additional charge (2,900 g)
3 units 300 g additional charge (3,000 g)
4 units 400 g additional charge (3,100 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".
OBH723G
Compressor
High-pressure
switch
Oil separator
Stop valve with
service port
Muffler
Capillary tube
LEV A
Strainer
Stop valve
#100
LEV B
LEV C
LEV D
25 m
60 m
25
60
50 m 60 m
200 400
Refrigerant piping length (L)
~ 40 m
(L-40) x 20 g/m
100 g + (L-40) x 20 g/m
200 g + (L-40) x 20 g/m
300 g + (L-40) x 20 g/m
400 g + (L-40) x 20 g/m
Discharge
temperature
thermistor RT62
Capillary tube
4-way valve
Outdoor heat
exchanger
temperature
thermistor
RT68
LEV E
Power
receiver
Indoor
a
units
b
c
d
Maximum amount of
refrigerant
~ 60 m
3,100 g
3,200 g
3,300 g
3,400 g
3,500 g
Outdoor unit union diameter
For
Indoor unit A
Indoor unit B
Indoor unit C
Indoor unit D
58
FAN-OUT
Ambient
temperature
thermistor
RT65
Defrost
thermistor
RT61
Capillary tube
Strainer
#100
Distributor
Max.
Height
difference
Outdoor
unit
15 m
10 m
UNIT: mm (inch)
Liquid 6.35(1/4)
Gas 12.7(1/2)
Liquid 6.35(1/4)
Gas 9.52(3/8)
Liquid 6.35(1/4)
Gas 9.52(3/8)
Liquid 6.35(1/4)
Gas 9.52(3/8)
UNIT: mm
15 m