FläktGroup Multi-DENCO - Page 112

Commissioning Multi-DENCO
112 FläktGroup DC-2013-0101-GB • Subject to modifications • R5-08/2020
Fig. 8-2
• Add ALL the remaining estimated refrigerant to the system to fill the liquid
receiver further.
6. Once all the refrigerant has been added, the liquid receiver needs to be checked.
• Measure the ambient temperature on the face of the condenser coil.
• Take several measurements at different positions and calculate an
average value.
• Using the average temperature, the level of the liquid receiver should match
Tab. 8-5
• For example; if the temperature is above 20°C, the liquid receiver should only be
80% full (no liquid refrigerant in the condenser coil)
• Otherwise; if ambient temperature is 0°C on the day of commissioning, then the
liquid receiver should be about 30% full (lots of liquid refrigerant in the condenser
coil)
• Using a touch probe on the receiver shell (under the insulation) measure every
5 to 10 mm to determine the liquid receiver fill level.
• If the level does not match, add/remove refrigerant to meet the values in
the table.
7. Once the refrigerant level is correct, perform standard calibration checking (chapter
8.3.4).
8. The condenser fan settings should then be restored to 24 Bar and left on 'Minimum
Speed' control.
Level when 'liquid flashes' are
observed.
Required level
Ambient Temperature
°C
Liquid Receiver Fill Level
%
30 80
20 80
10 50
0 30
-10 20
-20 15
-30 10
Tab. 8-5