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10.2. CU-3E18LBE CU-4E23LBE
10.2.1. 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.
* In case of indoor is CS-E21***, CS-XE21***, then ø 12.7
t0.8 gas-pipe size must be used together with CZ-MA2P
(pipe size expander)
• If total piping length of all indoor units exceed the equivalent
length listed above, additional charge with 20g of refrigerant
(R410A) for each additional meter of piping.
Refrigerant piping size
Outdoor Unit CU-3E18*** CU-4E23***
Liquid - side ø 6.35 t0.8 ø 6.35 t0.8
Gas - side ø 9.52 t0.8
ø 9.52 t0.8
*(ø 12.7 t0.8)
Outdoor Unit CU-3E18*** CU-4E23***
Equivalent length 30m 30m
Allowable piping length
Outdoor Unit CU-3E18*** CU-4E23***
Allowable piping length of each indoor unit (min. ~ max.) 3 m ~ 25 m 3 m ~ 25 m
Allowable total piping length of all indoor unit 50 m or less 60 m or less
Height difference between indoor and outdoor unit Outdoor unit located on upper side 15 m or less 15 m or less
Outdoor unit located otherwise 7.5 m or less 7.5 m or less
Height difference between indoor unit Outdoor unit located on upper side 7.5 m or less 7.5 m or less
Outdoor unit located otherwise 15 m or less 15 m or less
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