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Add refrigerant
The equipment contains a basic
quantity of refrigerant. Extra
refrigerant must be added if the
basic length of the refrigerant
pipes exceeds 5 metres. Refer to
the following table:
ML
261
ML
351
ML
521
ML
681
Basic pipe
length
Additional fill quantity
Up to and
incl.
5 m
0 g/m
5 m to max.
25 m
25
g/m
25
g/m
25
g/m
45
g/m
After the tightness check has
been successfully completed,
connect the vacuum pump via
the pressure gauge station to
the valve connections on the
outdoor component (see chapter
"Tightness check") and create a
vacuum.
Perform the following checks
prior to commissioning the
unit for the first time and after
any interventions affecting the
refrigerant circuit. Record the
results in the commissioning
report:
Check all refrigerant pipes and
valves using leak detection
spray or soapy water to ensure
they are tight and that the
suction and injection pipes
are not accidentally mixed up.
Perform this check when the
unit is not running .
Check the refrigerant pipes and
insulation for signs of damage.
Check the electrical connections
between the indoor unit and
outdoor component to verify
the correct polarity.
Check that all fastenings,
mountings etc. are firm and at
the correct level.
Before
commissioning
Note that the employed
refrigerant is always filled in
liquid form!
CAUTION
NOTE
Check the overheating to
determine the refrigerant fill
quantity
Wear protective clothing when
handling refrigerant.
CAUTION
Commissioning
Commissioning should only be
performed and documented
by specially trained personnel.
NOTE
The system can be commissioned
once all the components have
been connected and tested.
A functional check should be
performed to verify its correct
function and identify any unusual
operational behaviour prior to
handing it over to the operator.
Functional checks and
test run
Check the following points:
Tightness of the refrigerant
pipes.
Compressor and fan running
smoothly.
In cooling mode, cold air should
be output by the indoor unit,
and warm air should be output
by the outdoor component.
Functional test of the indoor
unit and all program sequences.
Check the surface temperature
of the suction pipe and
determine the overheating
of the vaporiser. Measure
the temperature by holding
a thermometer against the
suction pipe and subtracting
the boiling point temperature
indicated on the pressure
gauge.
Record the measured
temperatures in the
commissioning report.
Check that the stop valves
and valve caps are tight after
carrying out any work on the
refrigerant circuit. If necessary,
use appropriate sealant
products.
NOTE
Functional test for cooling
and heating modes
1. Remove the protective caps on
the valves.
2. Start the commissioning
procedure by briefly opening
the stop valves on the outdoor
component until the pressure
gauge indicates a pressure of
approx. 2 bar.
3. Use leak detection spray or
suitable devices to check that all
the connections are tight.
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