Mitsubishi Electric Mr.SLIM PUHZ-RP140YHA, Technical Data Book

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77
8-2. PUHZ-RP200·250YHA
8-2-1. 1:1 SYSTEM
(1) Pipe length
(2) Adjusting the amount of refrigerant
Check additional refrigerant charging amount referring to table 7 when the liquid pipe diameter is larger than
the standard size, and table 2 when the pipe of the standard diameter is used.
<Table 2>
<Table 1> Maximum pipe length (RP200·RP250)
Note : The maximum pipe length is 80m in case of new piping.
w
1 Be sure to use hard (tempered) one for pipe over [ 22.2.(Do not use soft (annealed) one.)
w
2 When using [ 31.75 pipe, the outdoor temperature range (dry-bulb temperature) for heating operation is -11 to +21 : .
70m
[30m]
SW
SW : When the outdoor unit is located lower than
the indoor unit, set DIP SW8-1 on the outdoor
unit controller board to ON.
<Marks in the table above>
The maximum pipe length
Charge-less pipe length
: It can be used.
: Cooling capacity is lowered. Refer to <Table6>
: Additional refrigerant charge is required when
the pipe length exceeds 20m. Refer to <Table7>
Liquid
pipe
(mm)
gas
pipe
(mm)
OD
Thick-
ness
OD
Thick-
ness
RP200
RP250
[
9.52
t0.8
[
12.7
t0.8
[
15.88
t1.0
[ 19.05
t1.0
20m
[20m]
20m
[20m]
[ 22.2
t1.0
50m
[30m]
50m
[30m]
[ 25.4
t1.0
Normal piping
70m
w
1
[30m]
70m
[30m]
[ 28.58
t1.0
SW
70m
[30m]
70m
[30m]
[ 19.05
t1.0
20m
[20m]
20m
[20m]
[ 22.2
t1.0
50m
[30m]
50m
[30m]
[ 25.4
t1.0
70m
[30m]
70m
[30m]
[ 22.2
t1.0
50m
[20m]
50m
[20m]
[ 25.4
t1.0
50m
[20m]
50m
[20m]
[ 28.58
t1.0
SW
50m
[20m]
50m
[20m]
[ 28.58
t1.0
SW
70m
[30m]
Nomal piping
70m
w
1
[30m]
[ 31.75
t1.0
w
2 SW
50m
[20m]
w
2
50m
[20m]
Amount of additional refrigerant charge (kg)
30 m and less 31-40 m and less 41-50 m and less 51-60 m and less 61-70 m and less 71-120 m and less
0.9 kg 1.8 kg 2.7 kg 3.6 kg
1.2 kg 2.4 kg 3.6 kg 4.8 kg
Outdoor unit
permitted
pipe length
RP200
RP250
120m or less
At time of shipping
(kg)
10.5
10.5
No additional
charge necessary
The additional charge
amount is obtained by
the following formula.
Main piping:
Liquid line size
[ 9.52 overall length [m]
o
0.09 [kg/m]
Branch piping: Liquid
line size
[ 9.52 overall length [m]
o
0.06 [kg/m]
Branch piping: Liquid
line size
[ 6.35 overall length [m]
o
0.02 [kg/m]
3.6 (kg)
Amount of additional
charge [kg]
Main piping:
Liquid line size
[ 12.7 over all length [m]
o
0.12 [kg/m]
– =
Additional charge amount
for 70 m
RP200 3.6 kg
RP250 4.8 kg
+
+
+
Calculate the additional charge amount based on the following procedure.
If the calculation results in an amount that is smaller than the "Additional charge amount for 70m," perform the additional charge using the amount shown
in "Additional charge amount for 70m."
•If the wiring connecting the indoor and outdoor units is longer than 80m. use separate indoor /outdoor unit
power supplies.
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