Carrier AQUASnap 30RB Installation, Operation & Maintenance Instructions Manual

Also see for AQUASnap 30RB: Manual Operation and maintenance instructions Installation instructions Installation, operation and maintenance instructions Controls and Troubleshooting

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Carrier AQUASnap 30RB Installation, Operation & Maintenance Instructions Manual Manual pdf 20 page image

20English% Inhibited Ethylene Glycol 10% 20% 30% 40%Freezing temperature −4 °C −9 °C −15 °C −23 °CCorrectionfactorsCapacity 0.990 0.980 0.960 0.940Absorbed power 0.995 0.992 0.988 0.983Loss of head 1.07 1.20 1.35 1.53(*) Note: Temperature values are indicative.Always refer to the temperatures indicated for the specific product usedtABle to use for CAlCulAtiNg the WAter CoNteNtIn THe SySTeMInstalled Unit .............Unit content (*) l .............Pipe content (**) l .............Uses (fan-coil, panels, radiators, etc.) (***) l .............Total content (****) l .............(*) Consult the technical data table.(**) Consult the pipe water content table.(***) Consult the manual for the installed uses.(****) The water content of the system must be between the minimum andmaximum values for the units with hydronic kit and greater than the minimumvalue for units without hydronic kit. The minimum value is necessary to provideoptimal comfort.For units without hydronic kit, add a suitable expansionvessel to the water content of the system. The watercontent is necessary to ensure the stability of plantoperation and accurate temperature control. It is oftennecessary to add a buffer water tank to the circuit in orderto achieve the required volume.7.2.3 - Circuit water contentWhatever the size of the system, the minimum content ofthe water circuit is given by the following formula:Content = CAP(kW) x 3.5 = Litreswhere CAP is the nominal system capacity (kW) atnominal operating conditions of the installation.For industrial process cooling applications, where highstability of water temperature levels must be achieved, thevalues above must be increased. We recommend consultingthe factory for these particular applications.7.3 - recommended water diagram (fig. 11/12)Typical water circuit diagram for unit 30RB___X9 withoutintegrated water pump (see fig. 11).Typical water circuit diagram for unit 30RB___-9 withintegrated water pump (see fig. 12).8 - elecTronIc conTrolOperation and control of all units is carried out via theelectronic control. The instructions supplied with thecontrol include comprehensive descriptions.PRO-Dialog + electronic controlPRO-DIALOG + is an advanced numeric control systemthat combines complex intelligence with great operatingsimplicity.PRO-DIALOG + constantly monitors all machineparameters and safety devices, and precisely manages theoperation of compressor and fans for optimum energyeficiency.It also controls the operation of the water pump.A powerful control systemThe PID control algorithm with permanent compensationfor the diference between entering and leaving watertemperature and anticipation of load variations regulatescompressor operation for intelligent leaving watertemperature control.To optimise power absorption, the PRODIALOG +automatically re-calibrates the set point of the enteringwater temperature based on the outside air temperature toone of the two pre-set values (occupied building and ofanunoccupied building for example).PRO-DIALOG + control is auto-adaptive for fullcompressor protection.The system permanently optimises compressor run timesaccording to the application characteristics (water loopinertia), preventing excessive cycling.In most comfort air conditioning applications this featuremakes a buffer tank unnecessary.Extended communications capabilitiesPRO-DIALOG + allows remote control and monitoringof the unit through a wired connection: 7-8 x 0.5 mm2multiple cables. The cable should be screened of theFROH2R or BELTEN 9842 type. The screening should begrounded only on the electric unit panel board.Functions available are start/stop, power demand limit ordual set-point and customer safety lock.The system permits remote signalling of any generalanomaly for each refrigerant circuit.