Specifications

Field Setting Si30-813
132 Test Operation
3.2.2 Cool / Heat Mode Switching (In case of heating and simultaneous
cooling / heating) operation connection
Set Cool/Heat Separately for Each BS Unit by Cool/Heat Selector.
(1) Before turning on the power of the BS unit, set the DIP switch (DS1-1) on the BS unit PC
board as following.
(2) Then, connect the COOL/HEAT selector to the terminal A, B and C of the terminal block
X2M on the BS unit PC board.
<Note>
•
This setting is read into the micro controller when turning on the power supply.
•
Be sure to make the setting before turning on the power supply.
•
Moreover, be sure to close the lid of the switch box after setting.
EXAMPLE OF TRANSMISSION LINE CONNECTION
•
Example of connecting transmission wiring.
Connect the transmission wirings as shown in the Fig. 1.
ON
OFF
DS1
12
X2M
ABC
COOL/HEAT selector
F2
B
C
A
F2
F1
F1
F2
F1
Outside unit
TO IN/D UNIT TO OUT/D UNIT
F1 F2
F1 F2 F1 F2
F1 F2
IN/D OUT/D.BS
REMOTE
CONTROLLER
BS unit A
F1 F2 F1 F2
IN/D
OUT/D.BS
BS unit B
COOL/HEAT
selector
Branch wiring
Use 2-core wires.
(There is no polarity.)
B
C
A
REMOTE
CONTROLLER
COOL/HEAT
selector
Cool/heat selector remote
control wiring
Use 3-core wires.
(Keep in mind the polarity.)
F1 F2 F1 F2
IN/D
OUT/D.BS
B
C
A
REMOTE
CONTROLLER
Final BS unit
Indoor unit for cooling
F2
F1
COOL/HEAT
selector
Fig. 1
F2
F1
F2
F1
F1 F2
F1 F2 F1 F2
IN/D
OUT/D.BS
F1 F2
F1 F2
OUT/D.BS
To the indoor unit where
the selection of heating
and cooling is available.
Final BS unit
In case of the indoor unit connect as the cool-only unit, it wire
he terminal of the last BS unit.
Cooling only
1st unit
Final unit