6 Installation
Installer and user reference guide
31
RWEYQ8~1 RWEYQ8~14T9Y1B
VRV IV water-cooled system air conditioner
4P452191-1 – 2017.04
6.8
Connecting the water piping
6.8.1
About connecting the water piping
Before connecting the water piping
Make sure the outdoor and indoor units are mounted.
Typical workflow
Connecting the water piping typically consists of the following
stages:
1
Connecting the water piping of the outdoor unit.
2
Filling the water circuit.
3
Insulating the water piping.
6.8.2
Precautions when connecting the water
piping
INFORMATION
Also read the precautions and requirements in the
following chapters:
▪ General safety precautions
▪ Preparation
6.8.3
To connect the water piping
a
b
a
Cooling water outlet
b
Cooling water inlet
Consult
"5.4.2 Water circuit requirements" on page 19
for the correct
tightening torque of the water piping connections.
6.8.4
To fill the water circuit
1
Connect the water supply hose to the fill valve (field supply).
2
Open the fill valve.
3
Run the pump ONLY and make sure that no air has been
caught in the water circulation system otherwise the plate heat
exchanger will freeze.
4
Check if the water flow rate is correct, otherwise the plate heat
exchanger will freeze. Measure any water pressure loss before
and after running the pump and make sure that the flow rate is
correct. If not, stop the pump immediately and carry out
troubleshooting.
6.8.5
To insulate the water piping
The outdoor water piping MUST be insulated to prevent
condensation during cooling operation and reduction of the heating
and cooling capacity.
See
"5.4.2 Water circuit requirements" on page 19
information.
6.9
Connecting the electrical wiring
6.9.1
Precautions when connecting electrical
wiring
DANGER: RISK OF ELECTROCUTION
WARNING
All field wiring and components must be installed by a
licensed electrician and must comply with the applicable
legislation.
WARNING
If NOT factory installed, a main switch or other means for
disconnection, having a contact separation in all poles
providing full disconnection under overvoltage category III
condition, MUST be installed in the fixed wiring.
WARNING
▪ ONLY use copper wires.
▪ Make sure the field wiring complies with the applicable
legislation.
▪ All field wiring must be performed in accordance with
the wiring diagram supplied with the product.
▪ NEVER squeeze bundled cables and make sure they
do not come in contact with the piping and sharp
edges. Make sure no external pressure is applied to the
terminal connections.
▪ Make sure to install earth wiring. Do NOT earth the unit
to a utility pipe, surge absorber, or telephone earth.
Incomplete earth may cause electrical shock.
▪ Make sure to use a dedicated power circuit. NEVER
use a power supply shared by another appliance.
▪ Make sure to install the required fuses or circuit
breakers.
▪ Make sure to install an earth leakage protector. Failure
to do so may cause electric shock or fire.
▪ When installing the earth leakage protector, make sure
it is compatible with the inverter (resistant to high
frequency electric noise) to avoid unnecessary opening
of the earth leakage protector.
Install power cables at least 1 m away from televisions or radios to
prevent interference. Depending on the radio waves, a distance of
1 m may not be sufficient.
WARNING
▪ After finishing the electrical work, confirm that each
electrical component and terminal inside the electrical
components box is connected securely.
▪ Make sure all covers are closed before starting up the
unit.
NOTICE
Do NOT operate the unit until the refrigerant piping is
complete. Running the unit before the piping is ready will
break the compressor.
NOTICE
If the power supply has a missing or wrong N-phase,
equipment will break down.