Mitsubishi Electric Mr. SLIM MSZ-FA25VA Technical Manual página 669

(3) Pipe size and refrigerant pipe limits.
Outdoor
Gas side
unit
Outdoor unit side Indoor unit side Outdoor unit side Indoor unit side
{ 15.88<5/8> RP50
TWIN 100-140
TRIPLE 140
Note1. The number of bendsin the refrigerant pipe is respectively 8 or less in the range of <A+B> <A+C> <A+D>
2. PUHZ-P100: 20 m chargeless, PUHZ-P125,140: 30 m chargeless
Indoor unit
B
Distribution pipe
<TWIN SYSTEM>
Total length A + B + C
P100-140: 50 m
8-2. ADJUSTING THE AMOUNT OF REFRIGERANT
• Check additional refrigerant charging amount referring to table 5.6 when liquid pipe is one size larger than standard diameter.
<Table 5> Required additional charge when the pipe size is larger than the standard diameter (1:1 SYSTEM)
Liquid pipe dia Chargeless
O
P100 12.7
O
P125,140 12.7
<Table 6> Required additional charge when the pipe size is larger than the standard diameter (TWIN/TRIPLE SYSTEM)
Capacity When the extension pipe length (main piping + branch piping) exceed 10 m
P100,125,140 Additional refrigerant amount
If the calculation produces a negative number ( W [ 0), additional charging is not necessary.
O
L1: 12.7 liquid pipe length (m)
O
L2: 9.52 liquid pipe length (m)
O
L3: 6.35 liquid pipe length (m)
<Table 7> Additional refrigerant charging amount for pipe of standard diameter
Outdoor unit
PUHZ-P100VHA
PUHZ-P125,140VHA
Pipe size (mm)
Liquid side
{ 9.52<3/8>
RP50
{ 12.7<1/2> { 6.35<1/4>
RP60,71 RP60,71
{ 15.88<5/8> { 9.52<3/8>
Indoor unit side
Indoor unit
C
Outdoor unit
Outdoor unit side
A
Max. pipe length
Refrigerant amount to be added
10m 25m 100 g per 1 m longer than 10 m
10m 30m 100 g per 1 m longer than 10 m
W(g) = (100 o L1) + (60 o L2) + (30 o L3) - 2000
Permitted
Amount of unit filling refrigerant (kg)
pipe length
50m or less
50m or less
Actual piping leng <m>
Total length Indoor ~ Branch pipe
A+B+C+D Indoor B, C, D
|B-C|
50m 20m
8m
|B-C| |C-D| |B-D|
8m
Indoor unit
Distribution pipe
<TRIPLE SYSTEM>
Total length A + B + C + D
P140: 50 m
Additional refrigerant charging amount
for pipe length exceeding 30 m (kg)
21 — 30m
2.7kg 0.6kg
4.5kg 0kg
Esquemas frigorífi cos
Height deffence <m>
(Note 1)
Indoor ~ Indoor ~
No. of bend
Outdoor Indoor
H30m h 1m 15
Indoor unit side
Indoor unit
B
C
D
Indoor unit
Outdoor unit
Outdoor unit side
A
31 — 40m 41 — 50m
1.2kg 1.8kg
0.6kg 1.2kg
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