Carrier AquaSnap Plus 30AWH004HB Installation Manual

Contents

6 30AWHWater connectionsHydronic module (Fig. 9/10/11)Water connections (Fig. 14/15)The 30AWH__H units are equipped with an integratedhydronic module that allows fast installation with the aidof a few external components. The 30AWH__X units, on theother hand, do not have a circulation pump and expansionvessel. For this reason, they must be provided outside. Inany case, all the necessary protections and valves are to beinserted in the water circuit inside the unit.Refer to Figure 9 for the exact connection of the waterpipes.Figures 10 and 11 describe the integrated components intheir various configurations.Note: The correct dimensioning of the expansion vessel isleft to the installer as a function of the type of plant.Note: The discharge of the safety valve can be channeled tothe outside of the machine using the pre-cut holes (see Fig.4). In this case, it is necessary to provide a open drain funnel.30AWH__H integrated water circuit (Fig. 10)1 automatic purge valve2 flow switch3 safety valve (outlet 1/2')4 temperature probe5 circulation pump6 plug to unblock the seizing pump7 expansion vessel30AWH__X integrated water circuit (Fig. 11)1 automatic valve with air vent2 flow switch3 safety valve (outlet 1/2')4 temperature probeMake the plate heat exchanger hydraulic connectionswith the necessary components, using material which willguarantee that the screwed joints are leakproof.The figures 12 and 13 show a typical water circuitinstallation.For an application with a water circuit, the followingrecommendations must be taken into account:1. The pump must be fitted immediately before of theheat exchanger and after the connection to the systemreturn (unit without hydronic module).2. It is advisable to install shut-off valves to allow isolationof the most important circuit components, as well as theheat exchanger itself.These valves (ball, globe or butterfly valves) shouldproduce a minimum loss of charge when they are open.3. Provide unit and system drains at the lowest systempoint.4. Install purges in the higher sections of the installation.5. Pressure ports and pressure gauges should be installedupstream and downstream of the water pump.6. All piping must be adequately insulated and supported.Installation of the following components is obligatory:1. The presence of particles in the water can lead toobstructions in the heat exchanger.It is therefore necessary to protect the heat exchangerinlet with an extractable mesh filter. The filter meshgauge must be at least 10 mesh/cm 2.2. After assembling the system, or repairing the circuit, thewhole system must be thoroughly cleaned with specialattention paid to the state of the filters.3. Pump flow rate control is made through a flow controlvalve, which must be installed on the delivery pipeduring installation.4. When water has to reach temperatures below 5°C, or theequipment is installed in areas subject to temperaturesbelow 0°C, it is necessary to mix water with inhibitedethylene glycol in suitable quantity.Anti-seizing pumpThe 30AWH__H units are equipped with protection againstthe seizing of the pump motor shaft. To allow this function,do not empty the system or disconnect the power duringlong periods of inactivity.In any case, if the pump rotor shaft seizes after a long periodof inactivity, the user must do the following to unblock it:- Disconnect the power- Remove the front panel- Unscrew the shaft-protection plug on the back of thepump- Insert a screwdriver in the slot and turn the rotor shaft- Remount the protection plug- Reconnect the powerSystem cleaning and Water CharacteristicsIn the case of a new installation, or cleaning the circuit, itis necessary to perform a preventive cleaning of the system.In order to guarantee the good operation of the product,each time you clean the system, replace the water or addglycol, check that the liquid appears clear, without visibleimpurities and that the hardness is less than 20 °f.Fig. 14A - Water flow rate (l/s)B - Available static pressure (kPa)Fig. 15A - Water flow rate, (l/s)B - Pressure drop (kPa)English