ACV E-Tech 240 Installation, Operating And Servicing Instructions

Also see for E-Tech 160: Installation & servicing instructions

Contents

ACV E-Tech 240 Installation, Operating And Servicing Instructions Manual pdf 10 page image

1. Central heating flow pipe2. Domestic hot water connections3. Expansion tank4. Heating resistors5. Drain cock6. Central heating return7. Pocket8. Internal stainless steel tank9. Primary tank10. Water low safety device11. 3 bar safety valve12. 70 mm rigid polyurethane foam insulation5 DESCRIPTIONFig. 10: The boiler68971532101112410Fig. 11: Control panel60854 6 7 981 2 3 5 10 115.2 DESCRIPTION OF OPERATION5.2.1 THE TANK-IN-TANK CONCEPTThe Etech’s series differs from traditional hot water producers in that ithas a tank immersed in the primary fluid contained in the outer body.When there is a temperature drop in the boiler because the centralheating system or the domestic hot water circuit needs hot water, theinternal thermostat starts up the power on the immersed electricalresistors. The heating elements quickly heat up the primary fluid, thuscreating a natural circulation around the tank.5.2.2 INDIRECTLY HEATING DOMESTIC HOT WATERThis circulation allows easier heat exchange between the primary fluidand the domestic water, all over the tank surface. The corrugations onthe outer shell of the tank increase the area of heat exchange stillfurther and thus speed up the process of heating the domestic water.5.2.3 EASY TO SET AND TOTALLY SAFEWith a single command, the water temperature of both the primarycircuit and the domestic hot water circuit can be set by the adjustablethermostat situated underneath the tank in the primary circuit.A cut-off thermostat, placed on the top of the boiler, automaticallyswitches off the power when the temperature of the water in theprimary circuit reaches 95° C. A manually reset safety thermostatswitches off the system if the temperature reaches 103° C.5.3 BUILD FEATURES5.3.1 OUTER BODYThe outer body containing the primary fluid is made of thick STW22 steel.5.3.2 TANK-IN-TANK TYPE EXCHANGER ACCUMULATORThe internal tank which has a large heating surface for the productionof domestic hot water is made of Chrome/Nickel 18/10 stainless steel.It is corrugated all the way up using an exclusive manufacturingprocess and is entirely argon arc welded using the TIG (Tungsten InertGas) process.5.3.3 INSULATIONThe boiler body is fully insulated by rigid polyurethane foam, with athickness of 70mm, with a high thermal insulation coefficient. This issprayed onto the tank without using any CFCs.5.3.4 JACKETThe boiler is covered by a steel jacket which has been scoured andphosphated before being stove finished at 220° C.5.3.5 HEATING ELEMENTSnding on the model, the boiler is fitted with either six or seven detachablestainless steel AISI 304L immersion heaters.5.3.6 CONTROL PANEL (FIG. 17)1 - On/off switch2 - Power selection switch3 - Summer/Winter selector switch4 - Onpeak indicator light5 - Booster switch6 - Booster indicator light7 - ACV controller 13 (optional)8 - Mano-thermometer9 - Thermostat adjustable between 60 and 85 °C10 - Safety thermostat:11 - Safety indicator light