Hitachi RCIM-1.0FSN2 - REFRIGERANT PIPING LENGTH; REFRIGERANT PIPING SELECTION

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INSTALLATION AND OPERATION MANUAL
11.4. REFRIGERANT PIPING LENGTH
The refrigerant piping between the indoor unit and the outdoor unit should be designed using the following table.
¡ Piping length specication:
Unit
Maximum piping length between
Outdoor and each indoor unit (L)
Actual/Equivalent
Maximum Height difference.
Outdoor unit is higher than indoor unit/
Indoor unit is higher than Outdoor unit
(H)
3HVRNME 50/70
30/20
4H(V)RNM1E 70/90
5H(V)RNM1E
75/95
6H(V)RNM1E
4HVRNS1E
50/70
5HVRNS1E
6HVRNS1E
 The possible combination between Outdoor Unit and Indoor Unit are the following:
Single System Twin System Triple System
L= A + Longest of B & C L= A + Longest of B, C & D
Quad system
L= A + B + longest of D, E or A + C + longest of F,G.
(m)
 NOTE:
L&H are the Length & Height indicated in the above chart.
For twin, triple and quad the length is the distance between the
Outdoor Unit and the farthest Indoor Unit
A
Twin B-C < 8 m B,C ≤ 10 m (each) >B,C
Triple
B-C
B-D
C-D
< 8 m B,C,D ≤ 10 m (each) >B,C,D
Quad
(D+B)-(F+C)
(E+B)-(F+C)
(G+C)-(E+B)
(G+C)-(D+B)
D-E
F-G
< 8 m
D+B
E+B
F+C
G+C
≤ 10 m (each)
>B+D
>B+E
>C+F
>C+G
11.4.1. REFRIGERANT PIPING SELECTION
 Select the piping connection sizes according to the following
procedures:
- Between Outdoor Unit and branch pipe:
- Select the same pipe connection size as the pipe size of the
Outdoor Unit
- Between branch pipe and Indoor Unit:
- Select the same pipe connection size as the pipe size of the
Indoor Unit
 Piping connection size of Outdoor Unit, Indoor Unit & Distributor
Outdoor
Unit
Pipe Size Branch Pipe
Gas Pipe
(A)
Liquid Pipe
(A)
Twin Triple
Quad
(1)
3.0 HP 15.88 (5/8) 9.53 (3/8) TE-03N - - -
4.0 HP 15.88 (5/8) 9.53 (3/8) TE-56N - - -
5.0 HP 15.88 (5/8) 9.53 (3/8) TE-56N - TE-56N
(2)
6.0 HP 15.88 (5/8) 9.53 (3/8) TE-56N TRE-06N TE-56N
(1)
Total I.U. Capacity after connecting second branch pipe
Indoor Unit
Gas piping Size
(B,C or D)
Liquid piping Size
(B,C or D)
0.8~2.0 HP ∅12.70 (1/2) ∅6.35 (1/4)
2.3~6.0 HP ∅15.88 (5/8) ∅9.53 (3/8)
(1)
Only for RAS-5/6H(V)RNM1E
(2)
Total Indoor unit capacity after connecting secon branch pipe:
≤ 2.0 HP TE-06N
2,3 to 6.0 HP TE-56N
PMML0197_r0_04-10.indb 28 08/07/2010 9:20:43