REMKO WKF 120 Duo - Manual (Page 42)

The time required to generate the vacuum is
dependent on the final pressure pipe volume of the
indoor units and the length of the refrigerant piping.
This always takes at least 60 minutes. Once any
foreign gases and humidity have been completely
extracted from the system, the valves on the pres-
sure gauge station are closed and the valves on
the outdoor unit are opened as described in the
"Commissioning" section.
Commissioning
NOTICE!
Commissioning should only be performed and
documented by specially trained personnel.
Observe the operating manual for the indoor
units and outdoor components when commis-
sioning the entire system.
Once all the components have been connected
and tested, the system can be put into operation. A
functional check should be performed to verify its
correct function and identify any unusual operating
behaviour prior to handing it over to the operator.
This check is dependent on the installed indoor
unit. The processes are specified in the operating
manual for the indoor units being commissioned.
Functional checks and test run
Check the following points:
n Leak-tightness of the refrigerant piping.
n Compressor and fan running smoothly.
n In heating mode, the indoor unit outputs
warmer water and the outdoor unit outputs cold
air.
n Function test of the indoor unit and all program
sequences.
n Check of the surface temperature of the suc-
tion pipe and that the vaporiser is not over-
heating. To measure the temperature, hold the
thermometer to the suction pipe and subtract
the boiling point temperature reading on the
pressure gauge from the measured tempera-
ture.
n Record the measured temperatures in the
commissioning report.
Function test of heating operating mode
1. Remove the protective caps from the valves.
2. Start the commissioning procedure by briefly
opening the shut-off valves on the outdoor
unit until the pressure gauge indicates a
pressure of approx. 2 bar.
3. Check all connections for leaks with leak
detection spray and suitable leak detectors. If
no leaks are found, fully open the shut-off
valves by turning them anti-clockwise using a
spanner. If leaks are found, draw off the
refrigerant and rework the defective connec-
tion. It is imperative that the vacuum creation
and drying steps are repeated!
4. Activate the main circuit breaker or fuse (to
be provided by the customer).
5. Program the Smart Control.
6. Switch on heating mode
Due to the turn on delay, the compressor
will start up a few minutes later.
7. Check all regulating, control and safety
devices for function and correct adjustment
during the test run.
8. Measure all cooling data and record the
measured values in the commissioning
report.
9. Remove the pressure gauge.
Final tasks
n Use the Smart Control to set the target temper-
ature to the required value.
n Re-install all disassembled parts.
n Familiarise the operator with the system.
NOTICE!
Check that the shut-off valves and valve caps
are tight after carrying out any work on the
cooling cycle. Use appropriate sealant prod-
ucts as necessary.
REMKO WKF Duo
42