Jandy LXi : installation and operation manual - Piscines et Spas ...

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Page 18LXi Pool/Spa Heater Installation and Operation ManualSection 5. Water Connections5.1 Water PipingFigure 10 illustrates typical piping for poolequipment in pool/spa combination pools. With itselectronic control, the LXi heater is particularly suitedfor this type of pool installation.The heater must be protected from back-siphoningof water, which can result in dry starts. If there isany chance of back-siphoning, provide a check valvebetween the pool and the filter pump inlet.Arrangement of pool system components otherthan as illustrated in these diagrams can affect the operationof the heater’s water pressure switch. Locationof the heater above or below the pool water surfacecan also affect operation of the switch. In general, thepressure switch can be adjusted to accommodate thiseffect if the heater water connections are no more thansix (6) feet below the pool water surface and no morethan 15 feet above it. See instructions for pressureswitch adjustment (Section 7.7) for more informationabout this.Note that when pool equipment is located belowthe pool surface a leak can result in large scale waterloss or flooding. Jandy Pool Products, Inc., cannot beresponsible for such water loss or flooding or the damagecaused by either occurrence.5.2 Check Valve InstallationInstall a check valve in the plumbing betweenthe pool inlet and the heater if there is any chance ofback-siphoning.Do not install any valve in the piping between theheater outlet and the pool, unless it is being used as adiverter valve. For special installations, such as waterconnections below the water level of the pool, or forother questions contact the Technical Service departmentat 1.707.776.8200 ext. 260.5.3 Automatic Flow Control ValveThe inlet/outlet header of the LXi heater comesequipped with an automatic flow control valve. Theautomatic flow control valve maintains the properflow through the heater at rates up to approximately125 Gallons Per Minute (GPM) (475 liters per minute[LPM]). If the filter system flow rate is higher thanapproximately 125 GPM (475 LPM), install a manualbypass valve (see Figure 11), then perform a temperaturerise test (see Section 7.8) and adjust the flow usingthe bypass valve until the proper temperature rise isobtained.5.4 Reversible Water ConnectionsThe LXi heater is shipped with water connectionson the right side, but can be modified in the fieldto provide left-side water connections. This procedureinvolves removing the heat exchanger headers andreinstalling them on opposite ends of the tube assembly.Some of the heater wiring must be disconnectedand re-routed, so this procedure must be done only bya trained service technician. Heat exchanger reversalsare generally done before the installation of powerand water to the heater. If you need to reverse the heatexchanger on a previously installed heater be sure thatAQUAPUREFigure 10. Typical Piping Installation
LXi Pool/Spa Heater Installation and Operation Manual Page 19all electrical power, the gas supply and water supplyhave been turned off before starting the procedure.These instructions have been written to include thesteps needed when reversing the water connections onan existing installation. If you are reversing the headerson a new installation, some steps will be ignored.Water connection reversal is illustrated in Figures 11and 12. Proceed as follows:1. For an existing installation, drain the heater byremoving the two drain plugs on the inlet/outletheader and the drain plug on the return header.2. Remove the heater front panel (door).3. Remove the I/O header side cover plates, top andbottom. See Figure 13.4. Remove the return header side cover plate. SeeFigure 13.5. Disconnect the blue "HiLimit" two-pin connectorfrom the Power Interface board in the raceway.Clip any wire ties attached to the harness. Feedthe "HiLimit" two-pin connector and wiring backthrough the way it is routed to the header so thatthe harness hangs free from the header, outside ofthe cabinet.6. Disconnect the two "WATER TEMP" temperaturesensor leads from the Power Interface boardin the raceway. Clip any wire ties attached to theharness. Pull the wires out of the cabinet so thatthey hang free from the header, outside of thecabinet.7. Disconnect the yellow "Water Press" two-pinconnector from the Power Interface board inthe raceway. Clip any wire ties attached to theharness. Feed the "Water Press" two-pin connectorand wiring back through the way it is routedto the water pressure switch so that the harnesshangs free from the water pressure switch, outsideof the cabinet.NOTE Be careful not to create any kinks in the waterpressure switch copper tubing when handlingthe header.8. For an existing installation, remove the couplingnuts from the header and disconnect the watersupply from the heater.9. Remove the 10 bolts and washers from the inlet/outlet header and remove the header from thetube assembly. Leave the spacer in place.10. Remove the 10 bolts and washers from the returnheader and remove the header from the tube assembly.Leave the spacer in place.11. For an existing installation, remove the tubegaskets and clean the header's mating surface ofany corrosion or debris. Replace the tube gasketswith new ones. Do not use any metal tools on theFigure 11. Water Connections as ShippedSIDELEFTSIDESUPPORTTOPPANELREARPANELDOORSUPPORTGRILLREAR VENTCOVERSIDERIGHTSIDESUPPORTRETURNHEADER SIDECOVER PLATEBASEFRONTPANEL(DOOR)I/O HEADER SIDECOVER PLATESTOP AND BOTTOMFigure 12. Water Connections ReversedFigure 13. LXi Panel Identification
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Page 56: H0286900ELIMITED WARRANTYThank you

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