Hitachi Set Free mini-HNRQ1 Series, Service Manual

Page: 28 / 187

21
INSTALLATION
3.2 Model of Branch Pipe
(1) E-102SN
The model of E-102SN branch pipe is used for the model of RAS-3.0~6.5HNBRKQ1 and RAS-
7.0~12HNBRMQ1 outdoor unit.
Unit: mm
Model E-102SN for RAS-3.0~6.5HNBRKQ1 and RAS-7.0~12HNBRMQ1
Gas Pipe
Liquid Pipe
(2) Precaution for branch pipe connection
Use the branch pipe to connect the outdoor/indoor units. Mounted the branch pipes to a pillar, a wall, or a
ceiling.
Keep the inlet pipe of the branch pipe straight, and the length of the straight pipe is no less than 0.5 meter.
Keep Horizontal
To Indoor Unit
To Indoor Unit
Branch
Connection
To Outdoor Unit
Keep
Vertical
Secure the Branch Pipe
to the surface of Pillar or Wall.
Keep
Keep
Horizontal
Ho
riz
on
ta
l
Secure the Branch Pipe
to Ceiling surface or Beam
Upper side
Upper side
Upper side Upper side
Branch
Pipe
Branch
Pipe
Branch
connection
Bending
Main Pipe
Radius
Main
Pipe
Branch
Pipe
Branch
Connection
Straight
Length
Main
Pipe
Min. 0.5m
Branch
Connection
Branch Pipe
Branch
Pipe
Main
Branch
Pipe
Connection
Branch Pipe
Branch Pipe
CORRECT INCORRECT CORRECT CORRECT
Min.
0.5m