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10 Commissioning
NOTICE!
Commissioning should only be performed by
specially trained personnel and documented
after the certificate has been issued. Observe
the operating manuals for the indoor unit and
outdoor unit when commissioning 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
units. The processes are specified in the operating
manual for the indoor units being commissioned.
NOTICE!
Always pay attention to the correct electrical
connection of the control line and power supply
to all units.
Functional checks and test run
Check the following points:
n Leak-tightness of the refrigerant piping.
n Compressor and fan running smoothly.
n In cooling mode, cold air output by the indoor
unit, and warm air output by the outdoor unit.
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 cooling operating mode
1. Remove the protective caps from the valves.
2. Start the commissioning procedure after
evacuating the pipe system by briefly
opening the shut-of
f 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.
4. If no leaks are found, fully open the shut-of
f
valves by turning them anti-clockwise using a
spanner. If leaks were found, draw off the
refrigerant and rework the defective connec-
tion. It is imperative that the vacuum creation
and drying steps are repeated!
5. Activate the main circuit breaker or fuse.
6. Use the remote control to set the indoor
unit's target temperature to a value that is
lower than the existing room temperature.
Due to the turn on delay
, the compressor
will start up a few minutes later.
7. Switch the indoor units to cooling mode.
8. Check all regulating, control and safety
devices for function and correct adjustment
during the test run.
9. Check the control of the indoor unit with the
functions described in the operating instruc-
tions: timer
, temperature adjustments and all
mode settings.
Check the individual operating parame-
ters with the help of the display on the
outdoor unit as described in the "Func-
tional checks and test run" section, and
note the value in the commissioning log.
10. Measure the overheating, outside, internal,
outlet and evaporator temperatures and
record the test data in the commissioning log.
11. Remove the pressure gauge.
Final tasks
n Use the remote control to set the target tem-
perature to the required value.
n Re-install all disassembled parts.
n Familiarise the operator with the system.
REMKO MVV...DC
42
42


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