Installation
72 Universal System Air Conditioner
■ Grouped drain piping
1) It is standard work practice to make connections to the main pipe from above. The pipe coming down from
the combination should be as large as possible.
2) The pipe work should be kept as short as possible and the number of indoor units per group kept to a
minimum.
Face the vent pipe mouth downward to keep
foreign matter from penetrating the system
Vent pipe
Face piping
downward
8. Optional Operation
1) Two Thermistor System(Ceiling Cassette/ceiling Concealed duct model)
(1) Open the rear cover of the wired remote-controller to set the mode.
(2) Select one of three selectable modes as follows.
• Position 1:
The room temperature is controlled by the thermistor of the main body.
• Position 2:
The room themperature is controlled by the thermistor of the wired remote-controller, control the
temperature according to the position of wired remote-controller.
• Position 3:
The room temperature is controlled by lower temperature between the temperature of main body and of
remote-controller sensor.
(3) Move the slide switch to set position.
(4) Close the rear cover and check if it works normally.
TH
R14H
SW TH
REMO
MAIN
2TH
OP7
R18H
R17H
OP6
LO
STAND
SW HIGH
HI
R03S
C070
R04S
R02S
R01S
OP3
OP2 OP1
R19H
R11H
R13H R12H
OP5R16H OP4
R15H
CO1H
REMO
Room Temp. sensor
2TH
MAIN
Position 2
Position 1
Position 3
Slide switch for ceiling height
Slide switch for 2 Thermistor
• Select the position after counselling with a customer.
• In case of cooling mode, room temperature is controlled by the main body sensor.
• To control the room temperature by a wired remote controller, install controller(room temp. sensor) to sense
the temperature more accurately.
• Maunfactured in the position 3.
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