Installation manual

Step 2. Position and Wire the DPCA
The Daikin Power and Communication Adapter (DPCA) provides
an interface between the thermostat and Indoor Unit.
To install the DPCA:
1. Position the DPCA in a suitable location, away from water
and near the Indoor Unit (for example, a backside cavity of
a wall-mounted unit). The DPCA is not plenum rated and
should be mounted in a non-plenum space.
2. Connect the DPCA power cable to the Indoor Unit power
supply terminals. Ensure that the electrical connections are
securely tightened.
3. Remove the DPCA cover by grasping both sides and pulling
along the length of the DPCA.
4. Use the Wiring Harness to connect the P2 terminal
on the DPCA to the S21 terminal on the Indoor Unit’s
main PCB. Refer to the Daikin system installation
manual for information about accessing the S21
terminal.
P1 Terminal
4-wire low-voltage
cable to thermostat
(not included)
P2 Terminal
Wire harness to Indoor Unit (included)
Power Cable
Power cable to terminal block on Indoor Unit
DPCA
1 2 3
Indoor Unit Terminal Block
1 2 3 4 5
Wire Harness
P2
Black
L1 L2 G
Red
Green
Wires to outdoor unit
are not shown
To terminal S21
on Indoor Unit
main control board
Cover
8