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Calorex Variheat AW600 Owners & Installation Manual
Also see for Variheat AW1200: Owners and installation manual
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Contents
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371002594 I S S UE 1 M172 V A R I HEAT3.4 PLUMBING INSTALLATIONThe Variheat should be connected as shown in section 3.0.If an existing heater is being retained then the Variheat should be connectedbetween the filter and the existing heater.Pool water connections on the machine are 1" BSPM stubs.The unit is supplied with two off each of the following PVC fittings:1" BSPF x 1" M1”F x 1½" M1½" x 50mm FSuitable breakable couplings, isolation, and drain down valves should beinstalled in the pool water inlet/outlet pipes local to Variheat unit.The heat exchanger in the Variheat will, on small pools, take the full flow rateof the recirculation system. On larger pools a bypass or separate auxiliarypump may be necessary. This method can also be used to reduce energyconsumption, by the installation of a two speed or auxiliary pump by-passingthe main pump/filter to satisfy pool water heating and dehumidificationwithout the need for the main pump to be running.When the pipework installation is complete the circulating pump should beswitched on and the system checked for leaks. Also check the filter gauge tosee that there is not excessive back pressure.A filter or magnetic trap needs to be in the boiler circuit to prevent the heatexchanger in the Variheat from blocking up.Condensate drainThe condensate driptray in the Variheat collects the water removed by thedehumidification process, It is therefore necessary to ensure that the Variheatis placed on a level plinth so that the condensate can run away and notoverflow the edges of the driptray inside the machine.All Variheat AW models have a ¾" BSPM threaded condensate drainconnection. The drain pipe should run away with adequate fall to waste ie ½"per foot min. and must incorporate a ‘U’ trap and tun dish.LPHW plumbingThe LPHW connections for connecting the boiler water flow and return to theVariheat are:¾" BSPM on AW600/9001" BSPM on AW1200/1500Suitable breakable couplings, isolation, and drain down valves should beinstalled in the boiler water flow and return pipes local to the Variheat.Water and air LPHW circuits inside the Variheat should be bled for air pockets.(Bleed valves fitted internally).A filter or magnetic trap needs to be in the boiler circuit to prevent the heatexchanger in the Variheat from blocking up.Refer to the boiler manufacturers instructions before designing the pipeworksystem.Important general points1. Do not route water pipes across service access panels or air inlet/outlets.2. The water circuits to and from the Variheat should be capable ofmaintaining the specified water flow required.3. All pipe work must be adequately supported with allowance forexpansion and contraction especially with regard to the plastic pipe work.4. It is recommended that when installing water systems the lastconnections to be made should be adjacent to the Variheat III to avoidundue stresses on the unit connections.5. All pool purifying devices and chemical injection systems must befitted down stream of the Variheat with a non-return valve to preventconcentrated chemicals back feeding into the heat exchangers.6. The practice of dosing chemicals direct into skimmer basket must notbe allowed as this would result in concentrated corrosive liquids passingover vulnerable metal components.7. Water quality must be maintained not only relating to solids, etc butfor pH between 7.4 - 7.8, and if pool water is saline at a maximumconcentration of 8mg/litre.8. See warranty exclusions on page 70. for total list of water qualitylimits. |
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