Multi-DENCO Commissioning
FläktGroup DC-2013-0101-GB • Subject to modifications • R5-08/2020 111
At average condensing temperatures of 41 °C with 6 K sub-cooling; 35 °C liquid temperatures. Density = 1 kg per litre.
3. Before adding refrigerant, set the condenser fans to minimum speed and lowest
pressure setting.
– This is to allow the liquid receiver to be assessed whilst the fans are operating.
4. Add the initial refrigerant.
• ONLY add 75% of the 'system refrigerant' (excluding the liquid receiver
refrigerant) should be added initially (see 'Initial charge for refrigerant circuits'
chapter 8.2.6).
• Enable the unit and set the compressors to operating at high speed (chapter
8.3.5)
• Add refrigerant in amounts no larger than 0.5kg into the suction line: using the
metering valve on appropriate service gauges.
• After each addition, allow the system to stabilise and check conditions before
adding any more.
• Monitor the sight glass throughout the process - when flashes of liquid are ob-
served – stop adding refrigerant
5. When liquid is observed, you will find that you have not use all of the estimated
refrigerant (system and liquid receiver)
– You will have only filled the liquid receiver to its minimum level (Fig. 8-2)
Condenser
Size
Liquid Receiver – 100% Capacity
Litres
100% Filled – R410A
kg
80% Filled – R410A
kg
DMOUCD013
7 7 5.6
DMOUCD021
12 12 9.6
DMOUCD026
15 15 12.0
DMOUCD032
18 18 14.4
DMOUCD050
21 21 16.8
DMOUCD075
21 21 16.8
Tab. 8-4
NOTICE
To change the required settings for C5-12 controls, you must use the display of the
unit, which requires the unit to be enabled. To perform safely you must observe the
following:
• Enable power to the unit and set the local isolator to the 'ON' position
• Wait for the unit to finish its start-up procedure
• DO NOT press the 'Enable' button on the home screen (bottom left hand corner)
• Navigate to the condenser settings (Advanced Level)
• Modify settings as advised
• Navigate to the home screen
• Set the local isolator to the 'OFF' position and remove power from the main
power distribution board
9 The unit is now ready for charging
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