ERHQ011~W1 + ERLQ011~W1
Outdoor unit for air to water heat pump
4PW54249-1
Installation manual
12
E
LECTRICAL
WIRING
WORK
Precautions on electrical wiring work
■
Use only copper wires.
■
A main switch or other means for disconnection, having a
contact separation in all poles, must be incorporated in the fixed
wiring in accordance with relevant local and national legislation.
Do not turn on the main switch until all the wiring is completed.
■
For W1
Make sure to connect power supply cables in normal phase. If
connected in reverse phase, the remote controller of the indoor
unit indicates "
U1
" and the equipment cannot operate. Change
any two of the three power supply cables (L1, L2, L3) to correct
phase.
■
Never squeeze bundled cables into a unit.
■
Fix cables so that cables do not make contact with the pipes
(especially on high pressure side).
■
Secure the electrical wiring with cable ties as shown in the figure
below so that it does not come in contact with the piping,
particularly on the high-pressure side.
Make sure no external pressure is applied to the terminal
connectors.
■
When installing the earth leakage circuit breaker make sure that
it is compatible with the inverter (resistant to high frequency
electrical noise) to avoid unnecessary opening of the earth
leakage circuit breaker.
■
As this unit is equipped with an inverter, installing a phase
advancing capacitor not only will deteriorate power factor
improvement effect, but also may cause capacitor abnormal
heating accident due to high-frequency waves. Therefore, never
install a phase advancing capacitor.
Secure the wiring in the order shown below.
1
Secure the earth wire to the stop valve attachment plate so that
it does not slide.
2
Secure the earth wire to the stop valve attachment plate one
more time along with the electric wiring and the inter-unit wiring.
■
Lay the electrical wiring so that the front cover does not rise up
when doing wiring work and attach the front cover securely.
■
All wiring must be performed by an authorized
electrician.
■
All components procured on the site and all electric
construction shall comply with the applicable local and
national regulations.
DANGER
High voltage
To avoid electrical shock, make sure to disconnect the
power supply 1 minute or more before servicing the
electrical parts. Even after 1 minute, always measure the
voltage at the terminals of main circuit capacitors or
electrical parts and, before touching, make sure that those
voltages are 50 V DC or less.
To persons in charge of electrical wiring work:
Do not operate the unit until the refrigerant piping is
complete. (Running it before the piping is ready will break
the compressor.)
DANGER
Before obtaining access to terminal devices, all supply
circuits must be interrupted.
DANGER
Be sure to install an earth leakage circuit breaker in
accordance with relevant local and national
regulations. Failure to do so may cause electrical
shock.
CAUTION
Be sure to install the required fuses.
1
Switch box
2
Stop valve mounting plate
3
Earth
4
Cable tie
5
Wiring between units
6
Power supply and earth wiring
Only if bottom plate heater applicable (ERLQ or optional)
7
Bottom plate heater cable
8
Power supply of bottom plate heater (from indoor unit)
1
Power supply, earth wiring, and if applicable: bottom plate heater
wire
2
Wiring between unit
4
3
3
3
2
1
V3
W1
5
8
6
4
7
5
8
6
7
1
2
1
2
1
2
Summary of Contents for ERLQ011BAV3
Page 20: ...4PW54249 1 Copyright Daikin...
