Multi-DENCO Commissioning
FläktGroup DC-2013-0101-GB • Subject to modifications • R5-08/2020 109
To set up the maximum design chilled water flow rate, on site:
• The unit must be powered on, pre-commissioned and running under automatic
control
• The chilled water pump must be operating to provide pressure differential across the
unit of 100 kPa (minimum 50 kPa, maximum 350 kPa)
• Force the chilled water valve to 100% open by reducing the set-point temperature
(supply or return) to below the water temperatures within the chilled water circuit
• Measure the chilled water flow rate using a hydronic manometer with the hoses
connected to the local orifice plate in the external chilled water pipework supplying
the unit (supplied/fitted by others)
• To adjust the maximum chilled water flow rate to design conditions, adjust the
setting PIC Valve Max Value % to achieve the design maximum flow rate (see the
C5-12 controller manual for instructions on how to do this)
• Record the maximum flow rate and PIC Valve Max Value %
8.3.8 Variances for F-Version
• Ensure you perform chapter 8.3.6 "Commissioning water circuits" before
chapter 8.3.5 "Commissioning refrigerant circuits".
• Ensure that the ambient temperature sensor is not in direct sunlight and is suitably
connected.
• Check operating status on the pump’s control panel.
• Check that there is a pre-charge of 1.5 bar pressure in the Expansion Vessel.
8.3.9 Variances for P-Version
• Ensure you perform chapter 8.3.6 "Commissioning water circuits" before
chapter 8.3.5 "Commissioning refrigerant circuits".
• Check the operation status of the pump
• Check that the temperature sensor is fitted to the outdoor dry-cooler water outlet
pipe and insulated.
• Ensure that a stable water temperature and flowrate can be achieved before
proceeding further with commissioning.
• Check functionality of controller fitted on the outdoor drycooler unit.
• To interrogate the integrated water pump requires a remote interface device –
contact your local sales for further information.
• Check that there is a pre-charge of 1.5 bar pressure in the Expansion Vessel.
• Check that the water temperature sensor is fitted to the pump inlet pipework in the
WaterCool module and correctly insulated.
8.3.10 Variances for W-Version
• Ensure you perform chapter 8.3.6 "Commissioning water circuits" before
chapter 8.3.5 "Commissioning refrigerant circuits".
• Ensure that a stable water temperature and flowrate can be achieved before
proceeding further with commissioning.
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