7 Commissioning
Installation and operation manual
26
RWEYQ8~RWEYQ8~14T9Y1B
VRV IV water-cooled system air conditioner
4P452190-1A – 2017.04
[2‑50]
Brine type setting.
By changing this setting, you can extend the operation range at the
brine side of the unit.
▪ Normal operation range at brine side (default): for use with water
as heat source medium.
▪ Extended operation range at brine side (default): for use with brine
as heat source medium.
NOTICE
By changing this setting to extended operation type, glycol
(40%) must be used as heat source medium to avoid
freeze up of the brine circuit or unit itself (cf. operation
range). Do not use water in this case!
[2‑50]
Description
0 (default)
No brine: water. Extended range impossible.
3
Use brine: glycol (40%). Extended range
possible.
[2‑73]
Zero energy dissipation control setting.
[2‑73]
Description
0 (default)
OFF
1
ON (with priority on cooling capacity)
2
ON (with priority on zero energy dissipation)
Zero energy dissipation control can be OFF if the mechanical room
is already equipped with a ventilation system or air conditioning
system for other facilities.
[2‑74]
Zero energy dissipation setting temperature.
If the unit internal temperature is higher than the zero energy
dissipation setting temperature, the zero energy dissipation control
will start and cool down the unit.
[2‑74]
Description
0
25
1
27
2
29
3 (default)
31
4
33
5
35
6
37
7
39
6.1.9
To connect the PC configurator to the
outdoor unit
X27A
a
b
c
2
3
4
5
H J
ST
X27A
A1P
a
PC
b
Cable (EKPCCAB)
c
Outdoor unit main PCB
7
Commissioning
After installation and once the field settings are defined, the installer
is obliged to verify correct operation. Therefore a test run must be
performed according to the procedures described below.
7.1
Precautions when commissioning
CAUTION
Do not perform the test operation while working on the
indoor units.
When performing the test operation, not only the outdoor
unit, but the connected indoor unit will operate as well.
Working on an indoor unit while performing a test operation
is dangerous.
NOTICE
Be sure to turn on the power 6 hours before operation in
order to have power running to the crankcase heater and
to protect the compressor.
During test operation, the outdoor unit and the indoor units will start
up. Make sure that the preparations of all indoor units are finished
(field piping, electrical wiring, air purge, ...). See installation manual
of the indoor units for details.
7.2
Checklist before commissioning
After the installation of the unit, first check the following items. Once
all below checks are fulfilled, the unit must be closed, only then can
the unit be powered up.
You read the complete installation and operation
instructions, as described in the
installer and user
reference guide
.
Installation
Check that the unit is properly installed, to avoid abnormal
noises and vibrations when starting up the unit.
Field wiring
Be sure that the field wiring has been carried out
according to the instructions described in the chapter
"5.8 Connecting the electrical wiring" on page 20
,
according to the wiring diagrams and according to the
applicable legislation.
Power supply voltage
Check the power supply voltage on the local supply panel.
The voltage must correspond to the voltage on the
identification label of the unit.
Earth wiring
Be sure that the earth wires have been connected
properly and that the earth terminals are tightened.
Insulation test of the main power circuit
Using a megatester for 500 V, check that the insulation
resistance of 2 MΩ or more is attained by applying a
voltage of 500 V DC between power terminals and earth.
Never use the megatester for the transmission wiring.
Fuses, circuit breakers, or protection devices
Check that the fuses, circuit breakers, or the locally
installed protection devices are of the size and type
specified
in
the
chapter
"4.4.1
Safety
device
requirements" on page 12
. Be sure that neither a fuse nor
a protection device has been bypassed.
