31
10. Installation Instruction
10.1 CU-3E19RBU
10.1.1 Select The Best Location
If an awning is built over the unit to prevent direct
sunlight or rain, be careful that heat radiation from
the condenser is not obstructed.
There should not be any animal or plant which
could be affected by hot air discharged.
Keep the spaces indicated by arrows from wall,
ceiling, fence or other obstacles.
Do not place any obstacles which may cause a
short circuit of the discharged air.
Recommended installation height for outdoor unit
should be above the seasonal snow level.
Refrigerant piping size
Outdoor Unit
CU-3E19**
Liquid - side
ø1/4" (ø6.35 mm) thickness 1/32" (t0.8 mm)
Gas - side
ø3/8" (ø9.52 mm) thickness 1/32" (t0.8 mm)
Outdoor Unit
CU-3E19**
Min. total piping length for additional gas
98.4 ft (30 m)
If total piping length of all indoor units exceeds the
minimum length listed above, additionally charge
with 0.2 oz (20g) of refrigerant (R410A) for each
additional feet (meter) of piping.
10.1.1.1 Outdoor
Unit
Installation
Diagram
Allowable piping length
Outdoor Unit
CU-3E19***
Allowable piping length of each indoor unit (min. ~ max.)
9.8 ft ~ 82.0 ft (3 m ~ 25 m)
Allowable total piping length of all indoor unit
164.0 ft (50 m) or less
Height difference between indoor and outdoor unit
Outdoor unit located on upper side
g
49.2 ft (15 m) or less
Outdoor unit located otherwise
h
24.6 ft (7.5 m) or less
Outdoor unit located otherwise
k
49.2 ft (15 m) or less
Height difference between indoor unit
Outdoor unit located on upper side
i
24.6 ft (7.5 m) or less
Outdoor unit located otherwise
j
49.2 ft (15 m) or less
Installation parts you
should purchase (
Ú
)
•
This illustration is for explanation purposes only.
* Note:
Respective indoor unit installation procedure shall refer to
instruction manual provided in the indoor unit packaging.
It is advisable to avoid more
than 2 blockage directions.
For better ventilation &
multiple-outdoor installation,
please consult authorized
dealer/specialist.
3
/
8
" (9.52 mm)
Gas side piping (
Ú
)
1
/
4
" (6.35 mm)
Liquid side piping (
Ú
)
Additional drain hose (
Ú
)
Connection cable (
Ú
)
(Conduit)
Power supply cord (
Ú
)
(Conduit)
Outdoor unit located
on upper side
Outdoor unit located
otherwise
j
k
j
h
g
i
Outdoor unit
Outdoor unit
Outdoor unit
t
i
n
u
r
o
o
d
n
I
t
i
n
u
r
o
o
d
n
I
Indoor unit
