Mitsubishi Electric M Series Manual page 511

M series
MXZ-8A140VA
H
h1
Total piping length
Farthest piping length (L)
Permissible
length
Piping length between outdoor unit and
(one-way)
branch boxes
Farthest piping length after branch box (I)
Total piping length between branch
boxes and indoor units
In indoor/outdoor section (H) 1
Permissible
height difference
In branch box/indoor unit section (h1)
(one-way)
In each branch unit (h2)
In each indoor unit (h3)
Number of bends
1 Branch box should be placed with in the level between the outdoor unit and indoor units.
• Additional charging is not necessary for this unit if the total pipe length (b1 + b2 + a1 + a2 + a3 + a4 + a5 + a6 + a7 + a8)
does not exceed 40 m.
• If the total pipe length exceeds 40 m, charge the unit with additional R410A refrigerant according to the permitted pipe
lengths in the chart.
After charging the unit with refrigerant, note the added refrigerant amount on the service label (attached to the unit).
Refer to the "installation manual" for more information.
<Table 1>
Total piping length
(b1+ b2 + a1+ a2 + a3 + a4 + a5 + a6 + a7 + a8)
Additional refrigerant charging amount
Reference (for service)
The amount of refilling refrigerant charge
If connecting an indoor unit with 9.52 liquid pipes (model number 71 or more for M-and S-series and model number 60 or more
for P-series), the additional refrigerant charging amount in Table 1 must be corrected (add the following R value from the value
given in Table 1).
Additional refrigerant charging correction amount
∆R=0.01 [kg/m] 9.52 branch pipe (liquid pipe) total length [m]
b1
a1
a2 a3 a4
h3
40m or less
0kg (no need)
8.5kg
(8.5 + 0)
MULTI SYSTEM Inverter Heat Pump
L
b2
h2
a5 a6 a7 a8
b1 + b2 + a1+ a2 + a3 + a4 + a5 + a6 + a7 + a8
b2 + a8 70m (b2 55m, a8
b1 + b2 55m
a8 15m
a1+ a2 + a3 + a4 + a5 + a6 a7 + a8
H 30m (In case of that outdoor unit is set higher than indoor unit)
H 20m (In case of that outdoor unit is set lower than indoor unit)
h1 + h2 15m
h2 15m
h3 12m
| b1 + a1 |,| b1 + a2 |,| b1 + a3 |,| b1 + a4 |,| b1 + a5 |,| b2 + a6 |,
| b2 + a7 |,| b2 + a8 | 15
41 – 50m 51 – 70m
0.6kg 1.4kg
9.1kg 9.9kg
(8.5 + 0.6) (8.5 + 1.4)
I
Outdoor unit
Branch box
Indoor unit
115m
15m)
60m
71 – 90m 91 – 115m
2.2kg 3.2kg
10.7kg 11.7kg
(8.5 + 2.2) (8.5 + 3.2)
C-509