Ideal Boilers Classic Combi FF 280 Installation And Servicing

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Classic Combi FF 280 - Installation24IsolatingvalveINSTALLATION41 GAS CONNECTION42 WATER CONNECTIONSCENTRAL HEATINGz When the CH load exceeds 20.5 kW (70 000 Btu/h) then28mm (1 1/10 ") pipes should be used, both to and fromthe boiler, as soon as is practicable after the initial 22mmconnection.z For methods of filling refer to Frame 4.1. Connect the CH flow and returnpipes to the boiler, as shown, orto the pipework previously fitted(Installations with bottomconnections only -refer toFrame 16).2. Ensure that the CH isolatingvalves are open.CompressionfittingBoilerDHWcalorifier ventz The DHW supply pipe must be thoroughly flushedBEFORE connecting to the boiler.z The boiler incorporates a DHW filter therefore noexternal device is necessary.z It is recommended that a water softening device is fittedon the cold water inlet supply, particularly in hard waterareas.z Ensure that the mains supply pressure is sufficient toprovide the maximum delivery of domestic hot water(approximately 0.9 bar, minimum). In areas where themains water pressure is known to be high (greater than10 bar) it is recommended that a water governor is fittedon the cold inlet supply to the boiler.DOMESTIC HOT WATER SUPPLY4. Ensure that the pump selector switch is set to No.3 andthat the pump is free to rotate.a. Remove the vent plug.b. Using a screwdriver, rotate the shaft several times.c. Replace the vent plug.Note. Some slight water leakage will occur.INSTALLATIONVent plugDetail of pumpselector switchRefer to 'Gas Supply' (page 5), for gas inlet service dimensions (Frame 2).A minimum pressure of 20mbar MUST be available at the boiler inlet, with the boiler operating.The main gas cock is on the left hand side of the gas control valve.To facilitate connection the gas cock may be removed from the gas control valve.b. The cap on the automaticair vent MUST be loose atall times.When filling there may be aslight water leak from thevent therefore electricalconnections should beprotected.c. Vent the DHW calorifiercircuit via the manual airvent on top of the calorifier.3. Fill and vent the system. Check for water soundness.IMPORTANT. When filling:a. Set the diverter valve manual lever to the OPENposition.Automatic air ventPumpDiverter valveNote. Themanuallever isshown intheCLOSEDpositionWhen filling is completereturn the lever to itsCLOSED position.IMPORTANT. Devices incorporating non-return valvesMUST NOT be fitted to the DHW inlet, unless provision ismade to accommodate the expansion of the DHWcontained within the appliance. A suitable expansionvessel of the 'Zilmet' or 'WMP' type should be fitted,externally to the boiler, between the non-return valve andthe boiler.1. Connect the hot and cold watersupply pipes to the boiler, asshown, or to the pipeworkpreviously fitted (Installationswith bottom connectionsonly - refer to Frame 16).2. Open the domestic hot waterdraw-off taps, clear air locksand check for watersoundness.CompressionfittingBoiler