Applicable Extension Pipe For Each Model - Mitsubishi Electric PLA-RP-AA Technical Data Book

8

APPLICABLE EXTENSION PIPE FOR EACH MODEL

8-1. PUHZ-RP·VHA, PUHZ-RP100~140YHA
The height difference between indoor and outdoor unit should be kept within 30 m for all models.
(1) 1:1 system
(a) Maximum pipe length
<Table 1> Pipe length for 1:1 system
Liquid
OD
pipe
Thick-
(mm)
ness
Gas
[9.52
OD
pipe
Thick-
t0.8
(mm)
ness
30m
RP35
10m
RP50
RP60
RP71
RP100
RP125
RP140
*1: Set DIP SW8-1 on outdoor unit controller board to ON.
*2: The maximum length is 50 m in case of using existing pipes.
[Marks in the table above]
: Standard piping
: It can be used, however, additional refrigerant charge is required when the pipe length exceeds 20m.
: It cannot be used.
: It can be used.
: It can be used, however, the capacity is lowered.
(b) Adjusting the amount of refrigerant
• Additional refrigerant charge is not necessary for the pipe length up to 30 m. When the pipe length exceeds 30 m or service
(refrigerant replacement) is performed, charge proper amount of refrigerant for each pipe length referring to table below.
Use refrigerant R410A. Use charge hose exclusive for R410A.
• When charging additional refrigerant, charge the refrigerant from low-pressure side of the port valve using a safety charger.
• Make sure that air purge for this unit at refrigerant replacement is performed from both high-pressure check valve and ser-
vice port. If air purge is performed only from one of them, air in not purged enough.
• When replacing refrigerant, charge the refrigerant from service port. When charged refrigerant is less than specified amount,
charge the refrigerant again from low pressure side of the port valve using a safety charger.
• Tighten the service port cap (nut) of stop valve firmly. The tightening torque is 12 to 16 N·m. (to prevent slow-leak)
• Check additional refrigerant charging amount referring to table 4 when liquid pipe is one size larger than standard diameter,
and table 2 when the pipe is standard diameter.
<Table 2> Additional refrigerant charging amount for pipe of standard diameter
Outdoor unit
PUHZ-RP35, 50VHA
PUHZ-RP60, 71VHA
PUHZ-RP100-140VHA, RP100-140YHA
<Table 3>
Outdoor unit
PUHZ-RP35, 50VHA
PUHZ-RP60, 71VHA
PUHZ-RP100-140VHA
PUHZ-RP100-140YHA
<Table 4> Required additional charge when the pipe size is larger than the standard diameter
Liquid pipe dia Chargeless
RP35, 50 [9.52
RP60, 71 [12.7
RP100-140 [12.7
[6.35
t0.8
[12.7 [15.88
t0.8 t1.0
50m 30m
50m 30m
10m 10m
10m 10m
Refer to (c) Capacity correction.
Additional refrigerant charging amount for pipe
Permitted
length exceeding 30 m (kg)
pipe length
31 — 40m 41 — 50m
50m or less
0.2kg 0.4kg
50m or less
0.6Kg 1.2Kg
75m or less
0.6kg 1.2kg
Recharge refrigerant amount or additional amount in parentheses
Permitted
pipe length
11 — 20m 21 — 30m
10m or below
50m or less 2.1
50m or less 3.1
75m or less 4.6
Max. pipe length
Refrigerant amount to be added
20m 30m
60 g per 1 m longer than 20 m
20m 30m 100 g per 1 m longer than 20 m
20m 50m
100 g per 1 m longer than 20 m
[9.52
t0.8
[12.7 [15.88 [19.05
t0.8 t1.0
30m (*1)
30m
30m (*1)
30m
30m 50m
30m 50m
75m (*2)
75m (*2)
75m (*2)
51 — 60m 61 — 75m
— —
— —
1.8kg 2.4kg
31 — 40m
2.7
2.3 2.5
(0.2)
4.1
3.3 3.5
(0.6)
5.6
4.8 5.0
(0.6)
74
[12.7
t0.8
[15.88 [19.05
t1.0 t1.0
30m
30m
50m (*1) 50m 50m (*1)
50m (*1) 50m (*1)
50m
50m (*1) 50m (*1)
50m
Refer to <table 4>.
Height
Number of
bends difference
30m or
15
above
41 — 50m 51 — 60m 61 — 75m
2.9
—
—
(0.4)
4.7 —
(1.2) —
6.2 6.8
(1.2) (1.8)
t1.0
—
—
—
—
7.4
(2.4)