22
Synchronized twin
Outdoor unit
Outdoor
unit
PUHZ-RP3VHA
PUHZ-RP3VHA-A
PUHZ-RP4-6VHA
PUHZ-RP4-6VHA-A
PUHZ-RP3VHA
PUHZ-RP3VHA-A
PUHZ-RP4-6VHA
PUHZ-RP4-6VHA-A
30 m or less
50 m or less
75 m or less
A + B + C (+D)
Additional refrigerant to be charged (kg)
Chargeless piping
length A + B + C
8 m or less
Indoor unit’s height
difference [B and C]
15 at most
Bend number
w
2
Permitted total piping
length A + B + C
Synchronized twin
Outdoor
unit
PUHZ-RP6VHA
PUHZ-RP6VHA-A
30 m or less
70 m or less
30 m or less
31 - 40 m
41 - 50 m
51 - 60 m
61 - 75 m
1.8
2.4
0.6
Not required
Liquid
[
6.35
Gas
[
12.7
Liquid
[
6.35
Gas
[
12.7
Liquid
[
9.52
Gas
[
15.88
Liquid
[
9.52
Gas
[
15.88
Liquid
[
9.52
Gas
[
15.88
Liquid
[
12.7
Gas
[
19.05
Liquid
[
12.7
Gas
[
19.05
Liquid
[
6.35
Gas
[
12.7
Liquid
[
9.52
Gas
[
15.88
Liquid
[
12.7
Gas
[
19.05
Liquid
[
9.52
Gas
[
15.88
Liquid
[
12.7
Gas
[
19.05
Liquid
[
9.52
Gas
[
15.88
Liquid
[
12.7
Gas
[
19.05
1.2
Charge-less piping
length A + B + C + D
8 m or less
Indoor unit’s height difference
[B and C] [C and D] [B and D]
15 at most
Bend number
w
2
Permitted total piping
length A + B + C + D
RP3 Twin (RP1.6
✕
2)
✕
✕
✕
50 m
50 m
✕
✕
50 m(
✽
1)
✕
✕
75 m(
✽
2)
✕
Branch pipe
diameter
[B and C]
Branch pipe
diameter
[B,C and D]
Main pipe diameter [A]
RP4 Twin (RP2
✕
2)
RP5 Twin (RP2.5
✕
2)
RP6 Twin (RP3
✕
2)
<Table 5>
<Table 6>
<Table 7>
Note 1: If total piping length exceeds charge-less piping length of 30 m, charge additional refrigerant according to the table 7.
Note 2: Bends number (
w
2) should be within 8 for each combination, A + B, A +C and A + D, and 15 in all.
Note 3: Height difference between indoor and outdoor unit is referred to no matter which unit is located higher or lower.
w
Charge additional
refrigerant from
the check valve
connected to the
pipe of low-pressure
side in indoor unit.
<Table 8> Pipe length for twin of RP 3 - 6 (Piping length: A + B + C)
<Table 9> Pipe length for triple of RP6 (Piping length: A + B + C + D)
[Marks in table]
✽
1 ··· Set DIP SW8-1 on outdoor unit control circuit board to ON.
✽
2 ··· When using existing piping, pipe length should be 50 m at most.
✽
3 ··· Height difference between indoor and outdoor unit should be
kept within 30 m in every case.
··· Normal piping
··· It can be used with some changes of piping length and the
amount of refrigerant to be charged.
✕
··· It cannot be used.
50 m(
✽
1)
50 m(
✽
1)
✕
75 m(
✽
2)
50 m
✕
Liquid
[
9.52
Gas
[
15.88
Liquid
[
12.7
Gas
[
19.05
Main pipe diameter [A]
50 m(
✽
1)
50 m(
✽
1)
✕
75 m(
✽
2)
50 m
✕
✕
50 m(
✽
1)
✕
✕
75 m(
✽
2)
✕
4-3-2. Synchronized twin and triple
(a) Pipe length
Please note that refrigerant piping length, bend number and height difference of indoor units are specified for each unit
combination.
Note: Be sure to use our Multi-distributor for distributing pipe to use existing piping.
OCT04A-1.qxp 04.9.29 9:14 AM Page 22
