"A" Ductable Liquid Chillers with Integrated Hydronic Module

11 - START-UP11.1 - Preliminary checks- Never be tempted to start the chiller without reading fully,and understanding, the operating instructions and withouthaving carried out the following pre-start checks:- Check the chilled water circulation pumps, air handlingunits and all other equipment connected to the evaporator.- Refer to the manufacturer's instructions.- For units without hydronic module, the water pumpoverheat protection device must be connected in serieswith the pump contactor power supply. If the pump is notsupplied with the unit (unit without hydronic module),verify that the power input of the field-installed pumpdoes not exceed the rating of the standard pump contactor,supplied in the control box (max. 3 kW).- Refer to the wiring diagram supplied with the unit.- Ensure that there are no refrigerant leaks.- Confirm that all pipe securing bands are tight.- Confirm the the electrical connections are secure.Depending on the installation and control type, each unit cancontrol its own water pump. If there is only one common pumpfor the two units, the master unit can control this. In this caseshut-off valves must be installed on each unit. They will beactivated at the opening and closing by the control of each unit(and the valves will be controlled using the dedicated waterpump outputs).30RY 017 to 080 (standard configuration: return watercontrol)1211.2 - Actual start-upIMPORTANT• Commissioning and start-up of the chiller must besupervised by a qualified refrigeration engineer.• It is strictly forbidden to energise the units, if the fan hasnot been connected to a duct system.30RY 017 to 080 (with configuration: leaving watercontrol)The outdoor installation option includes a protectiongrille that does not require this connection.• Start-up and operating tests must be carried out with athermal load applied and water circulating in theevaporator.• All set-point adjustments and control tests must becarried out before the unit is started up.• Please refer to the controls section of this manual.1 2The unit should be started up in Local ON mode.Ensure that all safety devices are satisfied, especially the highpressure switches.11.3 - Operation of two units in master/slave modeThe control of a master/slave assembly is in the entering waterand does not require any additional sensors (standard configuration).All parameters, required for the master/slave function must beconfigured using the Service Configuration menu. All remotecontrols of the master/slave assembly (start/stop, set point, loadshedding etc.) are controlled by the unit configured as masterand must only be applied to the master unit.IMPORTANT: The two units must be equipped with optionNo. 155 - CCN time scheduling and communications “ClockBoard”.Legend1 Master unit2 Slave unitAdditional CCN board (one per unit, with connection via communicationbus)Control boxes of the master and slave unitsWater inletWater outletWater pumps for each unit (included as standard for units with hydronicmodule)Additional sensors for leaving water control, to be connected to channel 1of the slave boards of each master and slave unitCCN communication busConnection of two additional sensors23