User manual VOKERA LINEA 24

[. . . ] The domestic hot water (dhw) service utilises a motorised control combined with a 3 port diverter valve to give hot water priority which also benefits from a preheat function. The Vokèra Linea 24 & 28 are combined central heating and domestic hot water appliances. By design they incorporate full sequence electronic ignition, circulating pump, expansion vessel, safety valve, temperature gauge, pressure gauge and 3 port diverter valve. They are produced as room sealed appliances suitable for wall mounting applications only. They are provided with a fan powered flue outlet with an annular co-axial combustion air intake which can be rotated through 360 degrees. [. . . ] Check the appearance of the gas flame to assess adequacy of combustion air supply. Re-check the flue system for soundness and adequacy of supports. Concluding Operations If external/internal controls have been disconnected and terminals TA & TA temporarily linked, remove the link and reconnect the controls circuit. Offer up the front casing to the back frame in a near vertical attitude and locate the hooks on the casing over the hooks on the frame. Slide the casing downwards to fully engage the hooks and to align the bottom fixing holes. (fig. 25) Complete details of the boiler, controls, installation and commissioning in the log book supplied with the boiler. This is an important document which must be correctly completed and handed to the user. Failure to install and commission this appliance to the manufacturers instructions may invalidate the warranty. SECTION 7 7. 1 INSTRUCTING THE USER Hand over the copy of the Users Instructions and boiler log book supplied with the appliance, together with these instructions. Explain how to operate the boiler correctly and how to use the timeclock and room thermostat if fitted. Show the user how to switch off the appliance and indicate the position of the electric supply isolator. Inform the user of the location of all drain cocks and air vents. The fault finding sequence charts in section 9 will serve to locate which component is the cause of any malfunction. Instructions for removal, inspection and replacement of the individual parts are given in the following pages. The domestic hot water heat exchanger may in certain conditions become partially blocked by scale deposits. Evidence of this will be deterioration in performance. This condition could well be treated using proprietary descalants following makers' instructions without dismantling the appliance by circulating a fluid through the dhw coil. To do this, disconnection from hot and cold services is necessary. Reconnect only after thorough flushing with clean water. Occasional maintenance of mechanical working parts will be necessary. Service kits are available from ypur local Vokèra stockists. General To ensure the continued safe and efficient operation of the appliance, it is recommended that it is checked and serviced as necessary at regular intervals. The frequency of servicing will depend upon the particular installation conditions and usage, but in general, once per year should be adequate. It is the law that any servicing work is carried out by a competent person such as a Vokèra service engineer, approved service agent, British Gas or other CORGI registered personnel. [. . . ] 11. 6. 5 11. 6 11. 6. 1 The pressure reading for maximum output should be : 24 36. 0mbar . (Plus or minus 3. 6mbar) 11. 6. 2 11. 6. 3 Linea 24 & 28 57 11. 6. 6 Reduce the domestic water flow rate to approximately 3-4 litres/min. Turn the domestic control knob slowly to minimum the boiler output will reduce to the minimum setting. If low flame cannot be established in this way, turn off the electricity supply, and disconnect a grey wire from the modulator coil. [. . . ]