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Switch only the No. 4 DIP switch of SW03 to ON
Battery kit
Screw
(Accessory of Battery kit)
Screw
(Accessory of
Battery kit)
Do not pull the wire too hard. The connector inside the Battery kit may come off.
Incorrect
Do not connect the Battery kit to the P.C. board on the left.
Battery kit
EN-17
ON
1 2 3 4
SW03
Connect to CN521
Do not bundle with communication wire
CAUTION
9
4
REFRIGERANT PIPING
If refrigerant gas has leaked during the installation work, ventilate the room immediately.
If the leaked refrigerant gas comes in contact with fi re, noxious gas may be generated.
After the installation work, confi rm that refrigerant gas does not leak.
If refrigerant gas leaks into the room and fl ows near a fi re source, such as a fan heater, cooking stove or heating
unit, noxious gas may be generated.
Permissible pipe length and permissible height difference
For piping dimensions, follow the Installation Manual attached to the outdoor unit.
REQUIREMENT
When the refrigerant pipe is long, set the support brackets to fi x the pipe at intervals of 2.5 to 3 m.
If the pipe is not fi xed, noise may be generated.
Connection pipe size of Flow Selector unit (default)
Outdoor unit side
RBM-Y1801****
Suction gas
HP/LP gas pipe
pipe
FU4PE
FU8PE
Ø28.6
FU12PE
WARNING
Indoor unit side
(Upstream)
(Downstream)
Liquid pipe
Gas pipe
Ø22.2
Ø15.9
Ø15.9
(Unit : mm)
Liquid pipe
Ø9.5
HP: high pressure
LP: low pressure
EN-18
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