ENGLISH-48
Model
MCU-S6NEK2N
MCU-S4NEK3N
MCU-S2NEK2N
MCU-S1NEK1N
Installing indoor units
Under 16 .0 kW indoor unit : Don’t use Y-connector
16 .0 kW ~ 28 .0 kW indoor unit : Use Y-connector at the Gas & liquid line
In case of using Y-connector, it is only connectable for port combination at below
Connectable port combination for Y-connector : A + B port, C + D port, E + F port
non-connectable port combination for Y-connector : B + C port, D + E port, non-
continuous port
Set Dip Switch option for using Y-connector
1
ON
2 3 4
1
ON
2 3 4
1
ON
2 3 4
1
ON
2 3 4
S/W Option
S/W Option
S/W Option
S/W Option
Default
Combination of
A+B port
Combination of
C+D port
Combination of
E+F port
In case of MCU connection in series, the maximum capacity of indoor units in MCU
series connection is 61 .6 kW
This unit is only
connectable for one
port under 16 Kw
This unit is impossible
to connect MCU to
MCU in series .
How to connect the pipes
Pipe connection from outdoor unit
Default installing direction .
Pipe connection to indoor unit
Gas pipe (welding)
liquid pipe (welding)
Protect with wet towel
when welding
70 mm
70 mm
low pressure gas pipe conection (welding)
High pressure gas pipe connection (welding)
liquid pipe connection (welding)
❋
❋
When installing MCU, use the pattern sheet for installation that is provided with the product .
❋
❋
When welding the gas pipes, protect the product with the flame-proof sheet .
❋
❋
When connecting the MCU with outdoor units, default direction is set in the MCU .
If installing opposite direction, weld the enclosed copper cap in each high pressure, low pressure and liquid pipes .
Electrical wiring work