Carrier 30RQ 039 Series Installation, Operation And Maintenance Instructions

Contents

48Check water heat exchanger water loopWater loop volume = ................... (litres)Calculated volume = ................... (litres)3.25 litres/nominal kW capacity for air conditioning6.5 litres/nominal kW capacity for process coolingProper loop volume establishedProper loop corrosion inhibitor included .........litres of ...........................Proper loop freeze protection included (if required) ................ litres of ..............................Water piping includes electric tape heater up to the water heat exchangerReturn water piping is equipped with a screen filter with a mesh size of 1.2 mmCheck pressure drop across water heat exchanger (no hydronic module) or the external static pressure (with hydronic module)Entering water heat exchanger = .......... (kPa)Leaving water heat exchanger = ........... (kPa)Pressure drop (entering - leaving) = ..... (kPa)WArNINg (unit without hydronic module): plot the pressure drop on the water heat exchanger flow/pressure drop curve todetermine the flow rate in l/s at the nominal operating conditions for the installation. for units with hydronic module, aflow rate indication is displayed by the unit control (consulter the 30rB/30rQ 017-160 pro-Dialog+ control manual).Flow rate from the pressure drop curve, l/s = ..........Nominal flow rate, l/s = ......................The flow rate in l/s is higher than the minimum unit flow rateThe flow rate in l/s corresponds to the specification of ................... (l/s)Carry out the QUICk test function (see RB/30RQ 017-160 pro-Dialog+ control manual):Check and register the configuration of the follwoing parameters:Load sequence selection ....................................................................................................................................................................Capacity ramp loading selection .......................................................................................................................................................Start-up delay ......................................................................................................................................................................................Burner section .....................................................................................................................................................................................Pump control .......................................................................................................................................................................................Set point reset mode...........................................................................................................................................................................Night-time capacity setback ..............................................................................................................................................................Re-enter the set points (see controls section)to start up the heat pumpWArNINg: Be sure that all service valves are open, and that the pump is on before attempting to start this machine.Once all checks have been made, start the unit in the “LOCAL ON” position.Unit starts and operates properly.temperatures and pressuresWArNINg: When the unit has run for a while and temperatures and pressures have stabilised, record the following:Water heat exchanger entering water .................................... Water heat exchanger leaving water ......................................Ambient temperature .............................................................Circuit A suction pressure ....................................................... Circuit B suction pressure .......................................................Circuit A discharge pressure ................................................... Circuit B discharge pressure ...................................................Circuit A suction temperature ............................................... Circuit B suction temperature ................................................Circuit A discharge temperature ............................................ Circuit B discharge temperature ............................................Circuit A liquid line temperature ........................................... Circuit B liquid line temperature ...........................................Circuit A suction superheat ..................................................... Circuit B suction superheat ....................................................Circuit A electronic expansion device position..................... Circuit B electronic expansion device position ....................NOTEs: ................................................................................................................................................................................................................................................................................................................................................................................................................

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