5 Installation
Installation and operation manual
20
RWEYQ8~RWEYQ8~14T9Y1B
VRV IV water-cooled system air conditioner
4P452190-1A – 2017.04
NOTICE
In Europe, the
greenhouse gas emissions
of the total
refrigerant charge in the system (expressed as tonnes
CO
2
-equivalent) is used to determine the maintenance
intervals. Follow the applicable legislation.
Formula to calculate the greenhouse gas emissions:
GWP value of the refrigerant × Total refrigerant charge [in
kg] / 1000
2
Fix the label on the inside of the outdoor unit near the gas and
liquid stop valves.
5.7
Connecting the water piping
5.7.1
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.
5.7.2
To connect the water piping
a
b
a
Cooling water outlet
b
Cooling water inlet
Consult
"4.3.1 Water circuit requirements" on page 10
for the correct
tightening torque of the water piping connections.
5.7.3
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.
5.7.4
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
"4.3.1 Water circuit requirements" on page 10
for more
information.
5.8
Connecting the electrical wiring
5.8.1
Field wiring: Overview
In case of heat recovery mode
B
i
a
b
f
c
f
e
g
d
c
h
j
j
i
a
Field power supply (with earth leakage protector)
b
Main switch
c
Earth connection
d
Outdoor unit
e
Indoor unit
f
User interface
g
BS unit
h
Cool/heat selector
i
Circuit breaker
j
Fuse
Power supply 3N~ 50 Hz
Power supply 1~ 50 Hz
Earth wiring
In case of heat pump mode
a
b
d
d
d
c
b
g
g
h
h
c
f
h
e
a
h
i
f
f
e
e
h
h
h
h
a
Field power supply (with earth leakage protector)
b
Main switch
c
Earth connection
d
Outdoor unit
e
Indoor unit
f
User interface
g
Indoor power supply wiring (sheathed cable) (230 V)
h
Transmission wiring (sheathed cable) (16 V)
i
Outdoor power supply wiring (sheathed cable)
Power supply 3N~ 50 Hz
Power supply 1~ 50 Hz
Earth wiring
5.8.2
To route and fix the transmission wiring
Transmission wiring can be routed through the front side only. Fix it
to the upper mounting hole.
