Installation Guide

17
Installation of Refrigerant Piping
Definition Limit (actual length) Remarks
H1
*1
Level difference between the IDU and ODU
When the ODU is at
the upper position: <
50 m
When the ODU is at
the lower position: < 40
m
H2
*1
Level difference among IDUs < 20 m
L1
*2
The distance from the farthest IDU to the
first branch pipe of the IDU.
< 40 m
LM
The distance between the ODU and in
door
first branch pipe
< 90 m
Over 40 m:
Main gas pipe size
should be increased
by one level
L1-L2
T The distance from the farthest IDU to the
first branch pipe of the IDU.
< 40 m
L3
Distance from the IDU to the nearest
branch pipe
< 40 m
L4*
4
Distance from the IDU from nearest branch
pipe
< 40 m L4*
4
Total L
Total length of piping (total length of all
liquid pipes or gas pipes of the system)
Equivalent length <
1000 m
*1: Contact TICA's engineers when exceeding the above limits.
*2: If it exceeds 40 m, the remarks on the next page shall be met.
*3: The total refrigerant quantity of the unit (≤ 32 HP) should not be greater than 52.0 kg, and
that of the 34 HP unit should not be greater than 60.0 kg. Otherwise, the unit may fail to
operate safely and reliably. Please consult TICA's engineers for details.