Cooling Equipment And Computer Rooms At Low Outdoor Temperatures; Finishing The Outdoor Unit Installation; To Finish The Outdoor Unit Installation; Commissioning - Daikin RXS50K2V1B Installation Manual

5 Turn ON the power supply
5.6.4 Cooling equipment and computer rooms
at low outdoor temperatures
About the facility mode
This mode is especially for cooling applications like equipment or
computer rooms. NEVER use in residence or office applications
where people occupy.
To set the facility mode
When cutting the jumper J6 on the PCB, the operation range will
expand to –15°C. The facility mode will stop if the outdoor
temperature goes below –18°C and restarts when the temperature
rises again.
1 Remove the screws of the top plate.
2 Remove the drip proof cover.
3 Cut jumper J6 on the PCB.
a Top plate
b Drip proof cover
c PCB
INFORMATION
▪ Intermittent noises may be produced by the indoor unit
due to the fan of the outdoor unit that is turning ON
and/or OFF.
▪ Do NOT place humidifiers or other items which might
raise the humidity in rooms when you use the facility
mode.
▪ Cutting jumper J6 results in highest speed of the indoor
unit fan.
5.7 Finishing the outdoor unit
installation
5.7.1

To finish the outdoor unit installation

1 Insulate and fix the refrigerant piping and interconnection cable
as follows:
RXS50+60 + RX50+60 + ARXS50~71
R410A split series
3P360062-1H – 2016.09
3×
a
b
c
c
a
d
b
e
f
a Gas pipe
b Gas pipe insulation
c Interconnection cable
d Liquid pipe
e Liquid pipe insulation
f Finishing tape
2 Install the service cover.
6

Commissioning

NOTICE
NEVER operate the unit without thermistors and/or
pressure sensors/switches. Burning of the compressor
might result.
6.1

Precautions when commissioning

INFORMATION
During the first running period of the unit, the required
power may be higher than stated on the nameplate of the
unit. This phenomenon is caused by the compressor, that
needs a continuous run time of 50 hours before reaching
smooth operation and stable power consumption.
NOTICE
NEVER operate the unit without thermistors and/or
pressure sensors/switches. Burning of the compressor
might result.
6.2

Checklist before commissioning

Do NOT operate the system before the following checks are OK:
The indoor unit is properly mounted.
The outdoor unit is properly mounted.
The system is properly earthed and the earth terminals
are tightened.
The fuses or locally installed protection devices are
installed according to this document, and have not been
bypassed.
The power supply voltage matches the voltage on the
identification label of the unit.
There are NO loose connections or damaged electrical
components in the switch box.
There are NO damaged components or squeezed
pipes on the inside of the indoor and outdoor units.
There are NO refrigerant leaks.
The refrigerant pipes (gas and liquid) are thermally
insulated.
The correct pipe size is installed and the pipes are
properly insulated.
The stop valves (gas and liquid) on the outdoor unit are
fully open.
The following field wiring has been carried out according
to this document and the applicable legislation between
the outdoor unit and the indoor unit.
6 Commissioning
Installation manual
17