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 pipes.
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 component 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 components have been connected and
checked, the system can be commissioned. To
ensure the proper functioning of the units, a func-
tional check must be performed prior to handover
to the operator in order to detect any operational
irregularities. This check is dependent on the
installed indoor units. 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 pipes.
n
Compressor and fan running smoothly.
n
Function test of the indoor units and all pro-
gram 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
component until the pressure gauge indi-
cates 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 heat pump manager.
6.
Switching on heating mode
Due to the switch on delay, the com-
pressor will start up a few minutes later.
7.
Check the correct function and settings of all
regulation, control and safety devices 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 heat pump manager to set the target
temperature to the required value.
n
Re-install all disassembled parts.
n
Instruct the operator on how to use the units.
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 CMF/CMT
46
