FläktGroup Multi-DENCO - Enabling the Unit for Operation

Multi-DENCO Commissioning
FläktGroup DC-2013-0101-GB • Subject to modifications • R5-08/2020 103
8.3.2 Calibration of refrigeration devices
Before finishing commissioning, but after the initial charge has been added, various
refrigeration devices/sensors must be calibrated to ensure accurate operations. This
will require the controller/display to be enabled, but the cooling circuit must remain dis-
abled (i.e. compressors are off). This can be achieved by the controller or through dis-
abling MCBs.
These devices and the suitable commissioning devices are as follows:
– Suction transducer(s) with a refrigeration gauge
– Suction pipe temperature probe(s) with a temperature touch probe
– Discharge transducer with a refrigeration gauge
– Discharge pipe temperature probe with a temperature touch probe
8.3.3 Enabling the unit
With the initial charge added and the devices calibrated the unit can be enabled by the
following order:
• Enable any isolator or circuit breakers in the main power distribution board (both
boards for units with dual power supply)
• Ensure the outdoor unit's isolator is set to 'ON' (if applicable)
• Enable any 'in-line' isolation for the Multi-DENCO unit
• Set the door interlock isolator (if fitted) to the 'ON' position
• Wait 1 - 2 minutes for the unit to start up
• When display is active, press the 'Enable' button in the bottom left corner of the
display
9 The unit will now being to operate and control to the default settings in the
C5-12 controller.
NOTICE
Refrigeration devices that are not calibrated can result in safety and
protection features being disabled. Failure to calibrate during commissioning
will void the warranty.
NOTE!
For chilled water units and water cooled condenser units review and complete
requirements of chapter 8.3.6 before enabling the unit.
Once the electric power supply is connected and energised, there is a risk of elec-
tric shock during commissioning. Also inverter circuits may store electrical energy
for some time after isolation.
• Once isolated, allow time for stored energy to fully decay before operating on
inverter based circuits.