Carrier 30RQ 039 Series Installation, Operation And Maintenance Instructions

Contents

3514 - STaRT-Up14.1 - preliminary checksNever be tempted to start the heat pump without readingfully, and understanding, the operating instructions andwithout having carried out the following pre-start checks:• Check the chilled water circulation pumps, air handlingunits and all other equipment connected to the evapo-rator.• 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.• 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.14.2 - actual start-upImpOrTANT:• Commissioning and start-up of the heat pump mustbe supervised by a qualified refrigeration engineer.• start-up and operating tests must be carried out witha thermal load applied and water circulating in thewater heat exchanger.• All set point adjustments and control tests must becarried out before the unit is started up.• please refer to the 30rB/30rQ 017-160 pro-Dialog+control manual.The unit should be started up in Local ON mode.Ensure that all safety devices are operational, especiallythat the high pressure switches are switched on and thatthe alarms are acknowledged.14.3 - Operation of two units in master/slave modeThe control of a master/slave assembly is in the enteringwater and does not require any additional sensors (standardconfiguration). It can also be located in the leaving water.In this case two additional sensors must be added on thecommon piping.All parameters, required for the master/slave function mustbe configured using the Service Configuration menu. Allremote controls of the master/slave assembly (start/stop,set point, load shedding, etc.) are controlled by the unit con-figured as master and must only be applied to the masterunit.Depending on the installation and control type, each unit cancontrol its own water pump. If there is only one commonpump for the two units, the master unit can control this. Inthis case shut-off valves must be installed on each unit. Theywill be activated at the opening and closing by the controlof each unit (and the valves will be controlled using thededicated water pump outputs).Standard configuration: return water controlConfiguration: leaving water controllegend1 Master unit2 Slave unitAdditional CCN board (one per unit, with connection via communication bus)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 sensorsCheck valveT