Thermistor Interconnection Cable Routing (Lv); Outdoor Switch Box Connections; Precautions On Wiring Of Power Supply And Inter-Unit Wiring - Daikin EKCBX008BBV3 Installation Manual

Thermistor interconnection cable routing (LV)

WARNING
A cable tray or other means of protecting electrical wiring
must be used between indoor and outdoor unit to protect
the thermistor interconnection cable from mechanical
damage or weather influence such as direct sunlight.
1. Enter the thermistor interconnection cable through the low
voltage (LV) opening at the back of the outdoor unit.
2. Route the thermistor interconnection cable towards the switch
box located at the top of the outdoor unit.
3. Secure the thermistor interconnection cable with a cable tie
around the frame to keep it away from piping as shown in the
figure above. Keep a distance of minimum 25 mm from the
power supply wire and the control signal wires.

11.6. Outdoor switch box connections

4
2
3
1 Power supply
2 Indoor unit control signals
3 Indoor unit pump and heater control signals
4 Thermistor interconnection cable
Procedure
1 Open the switch box cover.
2 Using the appropriate cables, route and connect the power
supply cable and control cables to the appropriate terminals as
shown on the wiring diagram supplied with the outdoor unit and
according to the figure above.
3 Route and connect the thermistor interconnection cable as
shown in the figure above. Be sure not to force the connectors.
The connectors lock in one position only. Check both connector
sides for correct matching.
4 Secure the cables to the cable tie mountings with cable ties as
shown in the figure above.
WARNING
When connecting the power supply, the earth connection
must be made before the current-carrying connections are
established. When disconnecting the power supply, the
current-carrying connections must be separated before the
earth connection is. The length of the conductors between
the power supply stress relief and the terminal block itself
must be such that the current-carrying wires are tautened
before the earth wire is in case the power supply is pulled
loose from the stress relief.
Installation manual
16

Precautions on wiring of power supply and inter-unit wiring

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1
Use a round crimp-style terminal for connection to the power
supply terminal board. In case it cannot be used due to
unavoidable reasons, be sure to observe the following
instruction.
1 Round pressure terminal
1
2 Cut out section
2 3
3 Cup washer
- Do not connect wires of different gauge to the same power
supply terminal. (Looseness in the connection may cause
overheating.)
- When connecting wires of the same gauge, connect them
according to the below figure.
Use the correct screwdriver to tighten the terminal screws.
Small screwdrivers can damage the screw head and prevent
appropriate tightening.
Over-tightening the terminal screws can damage the screws.
See the table below for tightening torques for the terminal
screws.
Tightening torque (N•m)
M5 (X3M)
In wiring, make certain that prescribed wires are used, carry out
complete connections, and fix the wires so that outside forces
are not applied to the terminals.
CAUTION
1. In case the use of stranded conductor wires is
unavoidable for one reason or another, make sure to
install round crimp-style terminals on the tip.
Place the round crimp-style terminal on the wire up to
the covered part and fasten the terminal with the
appropriate tool.
2 1
1 Stranded conductor wire
2 Round crimp-style terminal
2. When connecting the connection wires to the terminal
board using a single core wire, be sure to perform
curling.
Not executing the connections properly may cause
heat and fire.
Strip the wire at terminal block:
1 Strip wire end to this point
2 Excessive strip length may cause electrical shock
or leakage.
2.0~3.0
EKCBX/H008BBV3
Unit for air to water heat pump system
4PW66983-1C – 08.2011