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Calorex AW550 Owners And Installation Manual
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Page 6 SD092750 ISSUE 343. Plumbinga) The Calorex Variheat Heat Pump must beconnected after the filter in the return pipe to thepool. If an existing heater is being retained, thenthe Calorex unit should be connected betweenthe filter and the other heater, see figure 6.b) Calorex heat pumps have water inlet/ouletconnections as follows:Models 550,800,1200 1½” BSP parallel, female.Models 1400, 1800 & 4000 1½” BSP parallel,male.c) Suitable breakable couplings should beinstalled local to heat pump.d) If heat pump installed at lower level than poolwater then isolation valves should be fitted.e) Drain valve or plug should be fitted to lower tofacilitate completedrain down in winter period.f) Connections on all models from 550 to 1200 areby parallel male fittings sealed by 'O' ring orsilicone mastic these should be hand tightenedonly, otherwise damage may result to thethreads.Note: Do not route pipes across service panels orAir In/Outletg) The heat exchanger in the Heat Pump will, onsmall pools, take the full flow rate of therecirculating system (see Figure 6). On largerpools a by-pass or separate auxiliary pumpmay be necessary. (bypass 1½ hp or largerwater pumps) see Figures 7 and 8.h) The condensate drain at the base of the unitcollects the condensation from the evaporatorfins. It is therefore necessary to ensurethat the Calorex is placed on a level plinth sothat the condensate water can run away and notoverflow the edges of the drip-tray inside themachine.Models 550,800,1200drain connection to waste via 22mm push fitdomestic waste system.Models 1400, 1800 and 4000drain connection to waste via ¾2 & 1½” BSPMstubs respectively.N.B Hose must be a watertight fit.i) When the pipework installation is complete thepool pump should be switched on and thesystem tested for leaks. Also check the filtergauge to see that there is not an excessiveincrease in back pressure. If everything is thenworking normally the water circulating system isready to use.j) Water circuit to and from unit to be capable ofmaintaining within specified limits the rate of flowrequired by heat pump (see data sheet).k) All pipework must be adequately supported withallowance for expansion/ contraction especially withplastic pipework.I) It is recommended that when installing water systemthe last connections to be made in the systemshould be the breakable connections to avoid anystresses on to the unit connections.m)To ensure efficient operation of the Heat Pump, anadequate constant flow of water is required throughthe condenser.This is normally achieved by ensuring that the filterpump is always operating at the same time as theHeat Pump but this requires consumption of electricitywhich would not normally be used during the filter ‘offcycle’ period.To reduce energy consumption the installation of a twospeed or small auxillary water pump (by-passing thefilter) should be considered. This method should onlybe used on heavily used pools (4 hours turnover orless to reduce the risk of overheating due to mainpump heat input.The circuit can be incorporated in the initial installationor added to an existing standard circuit.IMPORTANT1) The Calorex unit must never be connected in such away that the Heat Pump can be switched on withoutadequate water flow through the condenser.Integral interlock terminals provided on all models(see figure 9).2) All Pool Purifying Devices and Chemical InjectionSystems to be fitted down stream of heat pump with anon return valve to prevent concentrated chemicalsback feeding into the heat exchanger. The practice ofdosing chemicals direct into Skimmer Basket, whichresults in concentrated corrosive liquids passing overvulnerable metal components must not be allowed.3) Water quality must be maintained not only related tosolids, etc, but also pH between 7,4 ±0,4 and, if poolwater is saline at maximum concentration of 6% wt/wt.4) Maximum pressure of water in heat pump circuit id3kg/cm².(140psi) 1400, 1800,4000 models. |
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