Examples - Hitachi RAS-8FSXNS2E Installation & Operation Manual

Ⓖ CH-Box
Type CH-Box Model
CH-AP160SSX
Single
*3
CH-AP280SSX
CH-AP04MSSX
CH-AP08MSSX
Multiple
CH-AP12MSSX
CH-AP16MSSX
: When multiple indoor units are connected to the same CH-Box, they are controlled with the same operation mode.
*1
: The indoor units connected to the same branch of the CH-Box are controlled with the same operation mode.
*2
: The liquid pipe is not required to connect to the CH-Box.
*3
: In case that the number of connectable indoor unit exceeds four, the high/low pressure gas pipe, gas pipe and liquid
*4
pipe need to increase one size respectively.
3.2.2 Examples
Term
Total Piping Length
Maximum Piping Length
Piping Length
Equivalent Length
◆ Example 1: Line branch (including main pipe branch)
PMML0628 rev.0 - 05/2023
Number of connectable
Branch
indoor unit per branch
1 1 - 7
1 1 - 8
4 1 - 6
8 1 - 6
12 1 - 6
16 1 - 6
Symbol
Example 1 a+b+c
Example 2 d+e+f+g+h
Example 1 a+c
Example 2 f+h
-
-
Outdoor
Unit
A
a
First Branch
Multi-Kit
Available combination of indoor unit
*4
per CH-Box
6.0
*1
10.0
*1
16.0
*2
30.0
*2
30.0
*2
30.0
*2
Description
Total length of all liquid pipes (sum)
Actual length of the liquid pipe from outdoor unit stop
valve or piping connecting kit to the terminal unit.
Actual length of liquid pipe out of consideration of local
resistance, such as bent or elbow.
This length is obtained by converting local resistance, such
as bent or elbow, to straight pipe length.
c
b
Indoor Indoor
Unit Unit
capacity (HP)
per Branch
≤6.0
≤10.0
≤6.0 / 1x8.0HP / 1x10.0HP
≤6.0 / 1x8.0HP / 1x10.0HP
≤6.0 / 1x8.0HP / 1x10.0HP
≤6.0 / 1x8.0HP / 1x10.0HP
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