3.3 Refrigerant piping range
3.3.1 Refrigerant piping length
The refrigerant piping between the indoor unit and the RASC unit should be designed using the following instructions.
Keep the design point within the area of the chart, which shows the applicable height difference according to piping
length.
When RASC unit
is installed higher
than indoor unit
When RASC unit
is installed lower
than indoor unit
Setting before
shipment
(5-30 m)
(> 30 m)
(0-5 m)
3.3.2 Piping system (Header branch installation)
1 indoor unit system
2 indoor units system
3 indoor units system
-
L= A + the longest of B & C
L=A + the longest of B, C & D
4 indoor units system
Case a)
Case b) Only for (8/10)HP
L= A + the longest of (B + the longest of D & E) & (C + the longest of F & G)
L= A + the longest of B, C, D & E
?
N O T E
•
L and H are the length and height indicated in the above chart. For 1, 2 or 3 indoor unit systems, the length is the distance between
the RASC unit and the farthest indoor unit.
•
The liquid piping and the gas piping must be of the same length and run along the same route.
•
Multi-kits for multiple connections (optional accessory as system parts) must be used to install the branch pipe to the indoor unit. Install
them at the same horizontal level.
•
Install the branch piping as close as possible to the indoor units.
3 Piping work and refrigerant charge
Refrigerant piping range
SMGB0091 rev.2 - 11/2015
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