Mitsubishi Electric M Series Installation Manual page 24

MITSUBISHI ELECTRIC / MXZ SERIES
MXZ-D/E
MXZ SERIES - MULTI SPLIT - DC Inverter/Heat Pump - 2 to 6 ports
230V
Breaker
DIAMETER
SIZE
Liquid mm
(inches)
MXZ-2D33VA
MXZ-2D42VA
MXZ-2D53VA
MXZ-3E54VA
MXZ-3E68VA
MXZ-4E72VA
MXZ-4E83VA
MXZ-5E102VA
MXZ-6D122VA2
Example of total additional charge calculation
Formula
Precharge lenght (m)] x additional charge (g/m)
Example
Outdoor unit = MXZ-3E68VA
Total pipes lenght (inlet piping only) = 45 m
Lenght with additional charge (as tab) = 40 m
Additional charge = 20 g/m
Calculation: ∆W(g) = [45 - 40] x 20 = 100 g
22
L
N
MXZ-D/E_VA2
EXTERNAL PIPING
Gas mm Max Max
(inches) Height Lenght
10 15/20
15 20/30
15 20/30
15 25/50
TAB. 15 25/60
15 25/60
15 25/70
15 25/80
15 25/80
∆W(g) = [Lenght of pipes (m) -
S1
S2
S3
S1
S2
S3
S1
S2
S3
S1
S2
S3
Precharge
Max Precharge
lenght
Pipe Bends Kg
mt.
15/20 1,15 20
20/30 1,30 20
20/30 1,30 20
25/50 2,70 40
25/60 2,70 40
25/60 2,70 40
25/70 2,99 25
25/80 2,99 0
25/80 4,00 30
S1
S2
S3
S1
S2
S3
S1
S2
S3
S1
S2
S3
REFRIGERANT CHARGE
Additional
tonCO eq tonCO
charge
2
precharge max charge
g/mt
0,78
0,88
0,88
1,82
20 1,82
1,82
2,02
2,02
2,70
R410A
UNIT A
UNIT B
UNIT C
UNIT D
BREAKER
eq
2
0,78 15 A
1,01 15 A
1,01 15 A
1,96 25 A
2,09 25 A
2,09 25 A
2,63 25 A
3,10 25 A
3,38 25 A