Panasonic CU-2E18NBU - Installation Information; Check Points

15
9. Installation Information
9.1 Check Points
QUICK GUIDE PIPING AND ELECTRICAL SPECIFICATION
Piping size
Indoor (ID) &
Outdoor (OD)
units: Possible
Combination
Patterns
Capacity
(Btu/h)
Refrige-
rant
Gas Liquid
Standard
pipe
length
Max.
Eleva-
tion
Min.
pipe
length
for
each ID
unit
Max.
from
OD to
each
ID unit
Max.
total
length
Min. total
pipe
length
for
additional
gas
Addi-
tional
refri-
ge-
rant
Power
supply
Power
supply
wire
size
OD-ID
connection
wire size
Outdoor (OD):
CU-2E18NBU
Indoor (ID): 2
UNITS OF CS-
E9NKUAW
Outdoor (OD):
CU-2E18NBU
Indoor (ID): 2
UNITS OF CS-
E12NKUAW
Outdoor (OD):
CU-2E18NBU
Indoor (ID): 1
UNIT OF CS-
E9NKUAW +
1 UNIT OF
CS-E12NKUAW
16700 R410A
Ø3/8”
(Ø9.52mm)
Ø1/4”
(Ø6.35mm)
24.6 ft
See
Step 1
9.8 ft 82.0 ft 164.0 ft 65.6 ft
0.2
oz / ft
208/230V
60 Hz
MCA 20A
MOP
25A
AWG12 AWFG16
Example:
If total piping length of all installed indoor units is at 68.6 ft, the quantity of additional refrigerant should be 0.6 oz ......
(68.6 - 65.6) ft x 0.2 oz/ft = 0.6 oz.