19 Commissioning
Installation and operation manual
46
REMA5+REYA8~20A7Y1B
VRV 5 heat recovery
4P684060-1 – 2022.02
[2‑65]
Time between automatic leak detection
executions [days]
2
90
3
60
4
30
5
7
6
1
[2‑88]
Automatic leak detection activation.
When you want to use the automatic leak detection function you
have to activate this setting. By activating setting [2‑88], the
automatic leak detection will be executed depending on the defined
value setting. The timing for the next automatic refrigerant leak
detection is subject to setting [2‑65]. The automatic leak detection
will be executed in [2‑65] days.
Each time when the automatic leak detection function was executed
the system will stay idle until it is restarted by manual thermo ON
request or by next scheduled action.
[2‑88]
Description
0 (default)
No leak detection planned.
1
Leak detection planned once in [2‑65] days.
2
Leak detection planned every [2‑65] days.
18.2
Using the leak detection function
18.2.1
About automatic leak detection
The (automatic) leak detection function is not by default activated
and can only start working when the additional refrigerant charge is
inputted into the system's logic (see [2‑14]).
The leak detection operation can be automated. By changing
parameter [2‑88] to chosen value, the interval time or the time until
the next automatic leak detection operation can be chosen. The
parameter [2‑88] defines whether the leak detection operation is
executed one time (within [2‑65] days) or intermittent, respecting an
interval of [2‑65] days.
Availability of the leak detection function feature requires input of the
additional refrigerant charge amount immediately after finishing the
charging. The input must be executed before performing the test
operation.
NOTICE
If a wrong value is input for the additional charged
refrigerant weight, the accuracy of the leak detection
function will decrease.
INFORMATION
▪ The weighed and already recorded amount of
additional refrigerant charge (not the total amount of
refrigerant present in the system) must be entered.
▪ When the height difference between indoor units is
≥50/40 m, the leak detection function can not be used.
19
Commissioning
NOTICE
General
commissioning
checklist.
Next
to
the
commissioning instructions in this chapter, a general
commissioning checklist is also available on the Daikin
Business Portal (authentication required).
The general commissioning checklist is complementary to
the instructions in this chapter and can be used as a
guideline and reporting template during the commissioning
and hand-over to the user.
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.
19.1
Precautions when commissioning
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.
19.2
Checklist before commissioning
1
After the installation of the unit, check the items listed below.
2
Close the unit.
3
Power up the unit.
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
39], 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
nameplate 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
39]. Be sure that neither a fuse nor a
protection device has been bypassed.
