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11. Installation Instruction
11.1 Select the Best Location
(For CU-4E27QBR and CU-5E34QBR only)
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.
Refrigerant piping size
Outdoor Unit CU-4E27*** CU-5E34***
Liquid - side ø 6.35 t0.8 ø ø 6.35 t0.8
Gas - side
ø 9.52 t0.8
*(ø 12.7 t0.8)
ø 9.52 t0.8
*(ø 12.7 t0.8)
* In case of indoor is CS-MRE24***, then ø 12.7
t0.8 gas-pipe size must be used together with
CZ-MA2P (pipe size expander)
Outdoor Unit CU-4E27*** CU-5E34***
Equivalent length 45 m 45 m
If total piping length of all indoor units exceeds the
equivalent length listed aboved, additionally
charge with 20 g of refrigerant (R410A) for each
additional meter of piping.
Allowable piping length
Outdoor Unit CU-4E27*** CU-5E34***
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 70 m or less 80 m or less
Outdoor unit located on upper side
a
15 m or less 15 m or less
Height difference between indoor and outdoor unit
Outdoor unit located otherwise
b
7.5 m or less 7.5 m or less
Outdoor unit located on upper side
c
7.5 m or less 7.5 m or less
Height difference between indoor unit
Outdoor unit located otherwise
d
15 m or less 15 m or less
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