Cool / Heat Mode Changeover - Daikin REYQ-TA Series Service Manual

Field Setting from Outdoor Unit
2.5

Cool / Heat Mode Changeover

Set Cool/Heat Separately for Each Branch Selector Unit by Cool/Heat Selector.
Set remote controller changeover switch (SS1, SS2) as following:
• When using COOL/HEAT selector, turn this switch to the BS side.
When using cool/heat selector, connect to the terminal A, B and C on the EC of the electrical component box.
EXAMPLE OF TRANSMISSION LINE CONNECTION
• Example of connecting transmission wiring.
Connect the transmission wirings as shown in the figure below.
Outdoor unit
TO IN/D UNIT TO OUT/D UNIT
F1 F2 F1 F2
A
B
F1 F2 F1 F2
IN/D OUT/D.BS
C
Branch Selector unit A
F2 F2
F1 F1
149
1 1
2 2
SS1 SS2
Branch wiring
Use 2-core wires.
(There is no polarity.)
F1 F2 F1 F2
OUT/D.BS
IN/D
Branch Selector unit B
F1 F2
COOL/HEAT
selector
NOTE: This setting must be completed
before turning power supply ON.
In case of the indoor unit connect as the cooling only unit, it wire
the terminal of the last Branch Selector unit.
F1 F2
OUT/D.BS
F1 F2 F1 F2
IN/D OUT/D.BS
Final Branch
Selector unit
To the indoor unit where
the selection of heating
and cooling is available.
Cool/heat selector remote
control wiring
Use 3-core wires.
(Keep in mind the polarity.)
A
B
F1 F2
IN/D
C
Final Branch Selector unit
F1
COOL/HEAT
selector
F1 F2
Final unit
1st unit
Cooling Only
A
B
F1 F2
OUT/D.BS
C
F1
F1
F2
COOL/HEAT
selector
Indoor unit for cooling
SiUS371614E
F1 F2
F2
F2
Field Settings