Pump Down Operation; Electrical Wiring Work; Precautions On Electrical Wiring Work - Rotex RRHQ011AAV3 Manuel D'installation

P
UMP DOWN OPERATION
This unit is equipped with an automatic pump down operation which
will collect all refrigerant from the field piping and indoor unit in the
outdoor unit. To protect the environment, make sure to perform the
following pump down operation when relocating or disposing of the
unit.
The outdoor unit is equipped with a low pressure switch or
a low pressure sensor to protect the compressor by
switching it off. Never short-circuit the low pressure switch
during pump down operation!
1. Turn on the main power supply switch.
2. Make sure the liquid stop valve and the gas stop valve are open (see
"Stop valve operation" on page 6).
3. Press the pump down button (BS4) on the PCB of the outdoor unit
for at least 8 seconds.
4. The compressor and outdoor unit fan will start operating
automatically.
5. Once operation stops (after 3 to 5 minutes), close the liquid stop
valve and the gas stop valve.
6. The pump down operation is now finished. The remote controller may
display "U4" and the indoor pump may continue operating for about
30 seconds. This is not a malfunction. Even when the ON button on
the remote controller is pressed, the unit will not start to operate. To
restart operation of the unit turn off the main power supply switch and
turn it on again.
7. Turn off the main power supply switch.
Make sure to re-open both stop valves before restarting
operation of the unit.
E
LECTRICAL WIRING WORK
All wiring must be performed by an authorized
electrician.
All components procured on the site and all electric
construction should comply with the applicable local
and national codes.
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.)

Precautions on electrical wiring work

Before obtaining access to terminal devices, all supply circuits
must be interrupted.
Use only copper wires.
The wiring between the indoor unit and outdoor unit must be for
230 V.
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.
Never squeeze bundled cables into a unit.
Fix cables so that cables do not make contact with the pipes
(especially on high pressure side).
RRHQ0011~016AAV3(8) + RRHQ011~016AAW18
Outdoor unit for air to water heat pump
4PW50202-1
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.
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.
V3
4
5
6
1 Switch box
2 Stop valve mounting plate
3 Earth
4 Cable tie
5 Wiring between units
6 Power supply and earth wiring
2
1
1 Power supply and earth wiring
2 Wiring between unit
1
2
W1
3
3
3
4
5
6
2
1
2
1
Installation manual
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