Panasonic cu-2e18nbk installation
9. Installation Information
9.1 Check Points
QUICK GUIDE PIPING AND ELECTRICAL SPECIFICATION
Min.
Indoor (ID) & Outdoor
(OD) units: Possible
Combination Patterns
Outdoor (OD):
CU-2E18NBK
Indoor (ID): 2 UNITS
OF CS-E9NKKW
Outdoor (OD):
CU-2E18NBK
Indoor (ID): 2 UNITS
OF CS-E12NKKW
Outdoor (OD):
CU-2E18NBK
Indoor (ID): 1 UNIT
OF CS-E9NKKW +
1 UNIT OF
CS-E12NKKW
Refrige-
rant
R410A
Piping size
Gas Liquid
Ø3/8”
(Ø9.52mm)
Ø1/4”
(Ø6.35mm)
Max.
pipe
Standard
pipe
length
7.5 m 15 m 3m 25 m 50 m 20 m 20 g/m
Max.
Eleva-
tion
length
for
each
ID unit
from
OD to
each
ID
unit
Max.
total
length
Min. total
pipe
length
for
additional
gas
Additional
refrige-
rant
Power
supply
208/230V
60 Hz
MCA20A
MOP 25A
Power
supply
wire
size
AWG12 AWFG16
OD-ID
connection
wire size
Example:
If total piping length of all installed indoor units is at 22.5m, the quantity of additional refrigerant should be 50 g ......
(22.5 - 20) m x 20 g/m = 50 g
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10. Installation Instruction
10.1 Select The Best Location
10.1.1 Outdoor Unit
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-2E18***
Liquid - side ø1/4” (ø6.35mm) t0.8mm
Gas - side ø3/8” (ø9.52mm) t0.8mm
Outdoor Unit CU-2E18***
Min. total piping length for additional gas 20m
If total piping length of all indoor units exceeds the
minimum length listed above, additionally charge
with 20g of refrigerant (R410A) for each additional
meter of piping.
Allowable piping length
Outdoor Unit CU-2E18***
Allowable piping length of each indoor unit (min. ~ max.) 3 m ~ 25 m
Allowable total piping length of all indoor unit 50 m or less
Height difference between indoor and outdoor unit
Height difference between indoor unit
Outdoor unit located on upper side
Outdoor unit located otherwise
Outdoor unit located on upper side
Outdoor unit located otherwise
15 m or less
7.5 m or less
7.5 m or less
15 m or less
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