RIVA COMPACT HE

Precautionary statements

Before mounting the bracket, check that the di- mensions for fitting the exhaust fume duct are complied with (refer to the leaflet included with the flue kit, packed separately). Utilise the paper template supplied with the boiler to determine the fixing position for the bracketand boiler. Securely mount the bracket to the wall using appropriate fixings suitable for the type of wall construction and capable of supporting the total (wet) load. Refer to the weight given in the technical data tables specific for each model. 25 Installation 6.4 Overall dimensions C B ø80 A A, B and C ø100 190 245 196 47 73 200 400 31 INSTALLATION 50 115 142 35 16 803 700 front Boiler Electric connection area 100 257 Cold 60 water inlet C.h. 60 Gas return 65 52 64 65 C.h. flow D.h.w. 200 350 outlet Condensate drain connection area A --- air intake/flue outlet pipe (co---axial) B --- flue outlet pipe ø 80 mm (twin kit) C --- air intake pipe ø 80 mm (twin kit) Fig. 6.2 (all dimensions in mm) 26 Functions Pipe sizes (o.d) Gas, c.h. return, c.h. flow ø 22 D.c.w. inlet ø 15 D.h.w. outlet ø 15 Pressure relief valve ø 15 Condensate drain ø 25 (plastic) Tab. 6.1 (sizes in mm o.d.) 6.6 Mounting the boiler 1 Take the protective caps off the boiler pipe- work. 2 Thoroughly clean the connections. 3 Mount the boiler on its bracket. 4 Fix the c.h. valves A and gas cock B (¾”) to the boiler using the ¾” gaskets (Fig. 6.3) 5 Fix the ø 22 mm pipes C (c.h. circuit) to the c.h. valves A and the ø 22 mm pipe D (gas) to the cock B using the ¾” gaskets. 6 Repeat the above procedure for the d.c.w. inlet utilising the ½” cold water inlet valve E, the ø 15 mm copper tail F with its connection nut and two ½” gaskets. 7 Fix the ø 15 mm copper tail G with the ½” con- nection nut and a ½” gasket. C D G F C A B E A Fig. 6.3 8 Connect the pipe H (Fig. 6.4) from the pres- sure relief valve to the safety discharge pipe- work. 9 Fit the condensate drain 11 (Fig. 6.4) in the air brake connected to the drainage pipework. See also section 5.7 in this manual. Installation H 11 Fig. 6.4 6.7 Fitting the flue system Refer to the assembly instructions contained with- in the chosen flue kit packaging for the correct as- sembly and installation. In general, it has to be taken in consideration that the horizontal sections of the flue pipe must have an horizontal sloping not less than 1.5 deg. (25 mm per metre) towards the boiler. In the standard horizontal flue kit (Fig. 6.6A) the flue pipe is angled within the air duct therefore the air duct must be horizontally installed. If one or more extensions have to be used they must be adequately supported so that there is no sag in the flue pipe and a minimum fall of 1,5 deg. (25 mm per metre) over the whole length towards the boiler is ensured. Before fitting the flue system, ensure that the flue gasket shown in Fig. 6.5 (given with the boiler) is fitted to the boiler. Fig. 6.5 6.8 Choice of flue The following flue kits are available for connecting to the boiler: Standard horizontal flue kit (Fig. 6.6A) INSTALLATION Co---axial 60/100mm --- nominal length 1m Thiskitisnormally supplied with the boiler and can be fitted to allow discharge to the rear or either side of the boiler via the flanged boiler adapter elbow. Minimum length required is 0.3 m. Maxi- mum equivalent length of 2,7 metres (for M96.24SM/... and M96.28SM/...) or 1,8 metres (for M96.32SM/...) can be achieved utilising exten- sions. This flue system can only be used to dis- charge horizontally, it is not designed to enable termination in the vertical plane. Vertical kit with 90˚ elbow (Fig. 6.6B) Co---axial 60/100 mm Supplied with a straight flanged adapter a co--- axial elbow and a co---axial pipe with terminal, this kit allows for a vertical rise of 0,5 m from the boiler. In all circumstances the flue terminal must dis- charge horizontally and the equivalent flue length must not exceed 2,7 metres (for M96.24SM/... and M96.28SM/...) or 1,8 metres (for M96.32SM/...). Elbows 45˚ & 90˚ (Fig. 6.6C) 27 Installation Co---axial 60/100mm. Elbow kits enable the standard flue kitsto be offset to overcome obstructions or ensure the correct clearances for the flue terminal. Each elbow used in addition to the standard flanged elbow reduces the overall acceptable length of the flue system as follows: 45˚ reduce length by 0,5 m. 90˚ reduce length by 1 m. B Min = 0,3 m Max = 2,7 m INSTALLATION ø 60/100 Only for M96.32SM/... Min = 0,3 m Max = 1,8 m A 90˚=---1 m 45˚=---0,5 m C Fig. 6.6 Twin pipe kits ø 80 mm (Fig. 6.7) Various twin (split) pipes kits and optional acces- sories (elbows) are available to assist in the ter- mination of the flue where the boiler is installed in a location remote to an outside wall. These kits allow for separation of the air supply pipe from the pipe that discharges the exhaust gasses. Consequently it is possible to extend the flue system to a greater distance than that pro- vided by the standard horizontal co---axial flue. If either an additional 45˚ or 90˚ accessory elbow is used then the maximum permissible length of either pipe must be reduced by 0.90 m or 1,65 m respectively. N.B: The air intake and the flue outlet must not terminate on opposite sides of the building. 28 90˚=---1,65 m 45˚=---0,90 m Fig. 6.7 Two restrictors with different size are supplied with the twin pipe kit and have to be installed between the boiler and the air intake adapter (Fig. 6.8). Air intake adapter Restrictor Gasket Fig. 6.8 For the correct use of the restrictors with twin pipes refer to Tab. 6.2. For M96.24SM/..., M96.28SM/... Equivalent length Restrictor (air duct + flue duct) Between 1 and 15 m ø 50 mm More than 15 m up to 30 m ø 55 mm Installation For M96.32SM/... Equivalent length Restrictor (air duct + flue duct) Between 1 and 24 m ø 50 mm Tab. 6.2 Vertical--- roof kit (Fig. 6.9) This kit allows vertical termination of the flue pipe through the roof. The kit is 1.2 m in length. Exten- sion pieces (Co---axial) are also available which al- lows the flue system to be extended to a total overall maximum permissible length. Optional 45˚ and 90˚ elbowscan beused tooffset the flue route. Each additional elbow reduces the overall accept- able length of the flue system as follows: 45˚ reduce length by 0,5 m. 90˚ reduce length by 1 m. 90˚=---1 m max =8,5 m Only for M96.32SM/... max = 6 m 45˚=---0,5 m Fig. 6.9 6.9 Electrical connections Connection to the electricity supply 1 Remove the front panel of the case (see the section 9.2 in this manual). 2 Remove the screws I and J (Fig. 6.10). 3 Loosen the screws K. Fig. 6.10 4 Remove the side panels or move the lower part of the side panels as indicated in Fig. 6.11 and pull the control panel. When completely pulled out, the panel can ro- tate 45˚ downwards to facilitate the operations on the internal parts. Fig. 6.11 5 Loosen the screws L and remove the service panel (Fig. 6.12). 29 Installation L INSTALLATION tion area not less than 0,75 mm2. Fig. 6.12 For the electrical connection to the boiler use elec- tricwireswhich conform tothe currentregulations, with flexible cord, each core having a cross sec- 6 Connect the electrical supply flexible cord coming from the fused spur isolation switch to the power supply terminal block of the boiler (Fig. 6.13) keeping the same connections for the live (brown wire) and the neutral (blue wire). External 3 A fuse or fused plug with same current rating is recommended. Do not connect live wires to terminals to which the room thermostat must be con- nected. 7 Connect the earth wire (yellow/green). Connection of a room thermostat The room thermostat must be connected to the terminal block situated next to the control panel. When connecting any type of external control, the link M in Fig. 6.13 must be removed. To fused spur L N isolation switch Power supply terminal block M 3 2 1 External controls terminal block Fig. 6.13 30 8 Connect the room thermostat between ter- minals 1 and 3 as shown in Fig. 6.14. Do not connect live wires to terminals to which the room thermostat must be con- nected. Room thermostat Power supply terminal block L N T External controls 3 2 1 terminal block Fig. 6.14 9 Route the electrical supply flexible cord and the external control flexible cord as illustrated in Fig. 6.15. Lock the flexible cords in place with the flexible cord clamps To the external control device To the fused spur isolation switch Fig. 6.15 6.10 External frost protection 10 Connect the frost thermostat between ter- minals 1 and 2 as shown in Fig. 6.16. Do not connect live wires to terminals to which the room thermostat must be con- nected. Installation Frost thermostat Room thermostat L N T Power supply terminal block 2 1 External controls 3 terminal block INSTALLATION Fig. 6.16 31 7 COMMISSIONING WARNING The commissioning of this boiler and system must only be undertaken by a professionally qualified person in accordance with the re- quirements of the Gas Safety Installation and Use Regulations and be approved by C.O.R.G.I. Ensure that the Benchmark Log Book is satis- factorily completed during the commissioning process. The Log Book is located at the end of this manual. This manual should be handed to INSTALLATION pliance to I.S.813.2002. the User following completion of the installa- tion and commissioning process. Failure to comply with these requirements may invali- date the manufacturers guarantee. For Ireland (IE), it is necessary to complete a “Declaration of Conformity” to indicate com- 7.1 Electrical installation Preliminary electrical system checks to ensure electrical safety shall be carried out by a compet- ent person. i.e. polarity, earth continuity, resis- tance to earth and short circuit. If a fault has occurred on the appliance the fault find- ing procedure should be followed as specified in the service manual. 7.2 Gas supply installation 1 Inspect the entire installation including the gas meter, test for tightness and purge, all as de- scribed in BS 6891; For Ireland (IE), refer to I.S.813.2002. 2 Open the gas cock 14 (Fig. 7.1) on the appliance and check the gas connector on the appliance for leaks. 32 2 Open the cold water inlet valve 13 (Fig. 7.1). 14 13 Open position Fig. 7.1 7.3 Filling the d.h.w. system 1 Close all hot water draw---off taps. 3 Slowly open each draw---off tap and close it only when clear water, free of bubbles, flows out. 7.4 Initial filling of the system 1 Open the c.h. flow and return valves. 2 Remove the front panel of the case (see the section 9.2 in this manual. 3 Unscrew the cap on the automatic air purger valve 19 (Fig. 7.2) one full turn and leave open permanently. 4 Gradually open stopcock at the filling point connection to the c.h. system until water is heard to flow; do not open fully. 19 21 Fig. 7.2 5 Open each radiator air vent starting at the lowest point of the system and close it only when clear water, free of bubbles, flows out. Commissioning 6 Purge the air fromthe pump by unscrewing the pump plug 21 (Fig. 7.2); release the pump shaft by turning in the direction indicated by the arrow on the information plate. 7 Replace the pump plug. 8 Continue filling the system. The actual reading should ideally be 1,3 bar and not less than 0,3 bar. 9 Close all air release valves on the c.h. system. 10 Inspect the boiler and the system for water soundness and remedy any leaks discovered. 11 Cold flush the system to remove any loose par- ticlesand any system debrisbefore starting the boiler for the first time The flushing procedure must be in line with BS7593 Treatment of Water in d.h.w. c.h. Sys- tems. When the installation and second filling are completed turn on the c.h. system and run it until the temperature has reached the boiler operating temperature. The system must then be immediately flushed through. This procedure must be repeated twice more. During this operation we highly recommend the use of a c.h. flushing detergent in the quan- tities as specified by the appropriate manufac- turer, whose function it is to dissolve any foreign matter which may be in the system. The above operation could save the invalida- tion of your boilers guarantee and will alsopre- vent problems which you may experience in the future if an inhibitory is not used. 7.5 Condensate pipe and traps The full length of the condensate pipe should be check for leaks. The boiler has a built---in condensate trap pro- vided with a ball valve that prevents the escape of combustion products when the trap is empty. It is however recommended that any other trap in the drain system is correctly filled with water before to run the boiler. Some products incorporate an anti cycling time delay. It isnormal when first switching the boiler on for the boiler to operate on heating for a few sec- onds then switch off. After 3---4 minutes has elapsed the boiler will then re ignite and operate perfectly normally. The ignition delay cycle does not prevent normal operation of the boiler to pro- vide d.h.w.. If externalcontrols are fitted (e. g. Timeclock,room thermostat) ensure they ”call for heat”. 1 Turn on the electricity supply to the boiler, switching on the fused spur isolation switch. The appliance operation light 10 will flash every 4 seconds. 2 Turn the function selector 8 as in Fig. 7.3. The appliance operation light 10 will flash every 2 seconds. INSTALLATION 10 8 7 6 Fig. 7.3 The boiler will now go through an ignition se- quence and the burner will light. If during the ignition attempt period the boiler fails to light, the full sequence control p.c.b. will go to lockout and the lock---out signal lamp 6 will ap- pear. To reset the boiler press and release the boiler re- set button 7. 7.7 Checking the gas pressure at the burner This boiler has been tested to the highest qual- ity control standards. The maximum and minimum gas pressuresare already set during this quality control process however the checking procedure must be fol- 33 Commissioning lowed to ensure maximum operatingefficiency from the boiler. 1 Remove the front panel of the case (see sec- tion 9.2 in this manual). 2 Loosen the internal screw 41 (Fig. 7.4) on the Outlet Pressure Test Point of the Gas Valve and connect a pressure gauge using a suitable hose. 3 Set the d.h.w. and c.h. temperature control knobs to their maximum position. If external controls are fitted (e. g. Timeclock, room ther- INSTALLATION at the burner), accordingly with the model of mostat) ensure they ”call for heat”. 4 Switch on the boiler and open at least one hot water tap fully. 5 Check the maximum gas pressure and com- pare the value on the gauge with the value indi- cated in the sections 4.5 or 4.6 (gas pressures boiler installed. 6 Check the maximum gas flow at the gas meter and compare the value indicated in the sec- tions 4.5 or 4.6 (gas rate), accordingly with the model of boiler installed. 7 Switch off the boiler. 8 Disconnect the gas modulator coil by remov- ing the electrical connector A (Fig. 7.4). 41 A Fig. 7.4 9 Switch on the boiler. 10 Check the minimum gas pressure and com- pare the value on the gauge with the value indi- cated in the sections 4.5 or 4.6 (gas pressures 34 at the burner), accordingly with the model of boiler installed. 11 Switch off the boiler and re---connect the elec- trical connector A to the modulator coil. 12 Switch on the boiler. 13 Check that the boiler lights up uniformly. If not refer tosection “Ignition gas pressure ad- justment” of the Service Manualfor the necess- ary adjustment procedures. 14 Switch off the boiler, turn off thehot water tap(s) and disconnect the pressure gauge. If the maximum and minimum gas pressures measuredabove are notin accordance with the technical data (sections 4.5 or 4.6) then adjust- mentwill be necessary.A fullexplanation of the gas pressure adjustment procedure is given in the Gas Valve section of the service manual. If maximum and/or minimum gas pressures are adjusted then the ignition gas pressure must be checked and adjusted if necessary. Important: after the gas pressure checks and any adjustmentoperations,allof the testpoints and adjustment devices must be sealed. Re- place the adjustment protection cap. 7.8 Checking the burner ignition 1 Turn the boiler OFF 2 Open the gas valve outlet pressure test point 41 (Fig. 7.4) and connect the gauge. 3 Turn the boiler ON positioning the control se- lectors 8 in the positions as shown in as in Fig. 7.5 and ensure that the timer selector switch and room thermostat, if fitted, are set to “heat demand”. 10 9 8 7 6 Fig. 7.5 4 Watch the gauge and check to see if the igni- tion pressure registered correspondsto the va- lues as given in the Technical Data. Turn off the boiler and reignite it by turning the function se- Commissioning lector 8 to the OFF position and then back to that indicated in Fig. 7.5. 5 Repeat this process two to three times leaving 30 second intervals between each ignition. Check the ignition pressures and visually check that the burner lights uniformly and in a controlled manner. 6 If the burner ignition is not uniformly controlled then checks should be made to: --- the flue installation and termination. --- that the flue gasket as shown in Fig. 6.5 page “Ignition gas pressure adjustment” of the Ser- 27 is in place. --- that the burner and injectors are clean. --- that the boiler is set for the correct gas used (see Section Gas Conversion of this manual) 7 If the ignition pressure recorded is not as indi- cated in the TechnicalData then refer tosection vice Manual for the necessary adjustment pro- cedures. Important: after the gas pressure checks and any adjustmentoperations,all of the testpoints must be sealed and replace the adjustment protection cap. 7.9 Adjustment of useful c.h. output The following procedure allows the output of the boiler for central heating to be adjusted to meet the system requirement. Adjusting the usefulcen- tral output does not prevent the boiler firing at maximum rate for domestic hot water production. Refer to Fig. 7.11, Fig. 7.12 and Fig. 7.13 (de- pending on the gas used) and determine the cor- rect burner pressure appertaining to the output required for the central heating requirement. 1 Remove the front panel of the case. 2 Open the gas valve outlet pressure test point 41 (Fig. 7.4) and connect the gauge. 3 Rotate the knob 9 as in Fig. 7.6. 4 Turn the boiler ON positioning the function se- lector 8 as indicated in Fig. 7.6 and ensure that the timer selector switch and room thermostat, if fitted, are set to “heat demand”. Run the boiler in c.h. mode (do not open any d.h.w. tap). tain it. INSTALLATION 5 Keep pressed the reset button 7 for about 10 seconds until the lock---out signal lamp 6 blinks. 6 The lamps 10 should give the indication as in Fig. 7.7. If not, pressthe resetbutton 7repeatedly toob- Where: Lamp OFF Lamp ON Fig. 7.7 7 Keep pressed the reset button 7 for about 5 seconds. The boiler runs in C.h mode and the lamp 6 is switched OFF. The lamps 10 give the indication as in Fig. 7.8 Where: Lamp OFF Flashing lamp, alone or simulta- neously with an other lamp Fig. 7.8 8 Rotate the knob 9 in Fig. 7.6 to obtain the pres- sure to the burner to meet with the centralheat- ing system requirements. Refer to the diagrams shown in Fig. 7.11, Fig. 7.12 or Fig. 7.13 By rotating clockwise the pressure increases. 9 Make a note of the position of the knob 9 and recorded this in Fig. 7.9 below with an *. 35 Commissioning 10 Turn the boiler OFF and ON positioning the function selector 8 as indicated in Fig. 7.9 10 9 8 7 6 INSTALLATION erate. Fig. 7.9 11 Keep pressed the reset button 7 for about 10 seconds until the lock---out signal lamp 6 blinks. Note: during the adjustment the boiler doesn’t op- 12 Press the reset button 7 repeatedly (2 times) until the lamps 10 give the indication as in Fig. 7.10 (useful c.h. output adjustment mode). Where: Lamp OFF Lamp ON Fig. 7.10 13 Turn the knob 9 to the minimum (fully counter- clockwise) and then on the position correspon- ding to the position obtained on step 8. By turning the knob 9, the lock---out signal lamp 6 blinks quickly (2 per second) indicating that the setting has changed and must be me- morised by keeping pressed the reset button 7 for about 5 seconds until the lamps 10 all briefly simultaneously blink. 14 To reset the boiler to the normal operation turn it OFF and ON by the function selector 8. In any case, the boiler automatically resets to its nor- mal operation after 10 minutes. 36 33 31 29 27 25 23 21 19 17 15 13 Fig. 7.11 11 9 1 2 3 4 5 6 7 8 9 10 11 12 13 M96.24SM/... mbar M96.28SM/... M96.32SM/... Butane (G30) kW 32 30 28 26 24 22 20 18 16 14 12 10 5 7 9 11 13 15 17 19 21 23 25 27 29 M96.24SM/... mbar M96.28SM/... M96.32SM/... Fig. 7.12 Commissioning kW Propane (G31) 33 31 29 27 25 23 21 19 17 15 13 11 9 7 10 13 16 19 22 25 28 31 34 37 M96.24SM/... mbar M96.28SM/... M96.32SM/... Fig. 7.13 7.10 Checking the ignition device With the burner on high flame close the gas cock. After three ignition attempts (within about three minutes), the lock---out signal lamp 6 (Fig. 1.3 on page 2) must appear. To reset the boiler press and release the boiler reset button 7 (Fig. 1.3 on page 2). 7.11 Checking the flue system The flue system should be visually checked for soundness. Check all clamps, gaskets and fixing are secure and tight. Ensure that the flue terminalis sited correctly in ac- cordance with the flue fitting instructions and Fig. 5.1 on page 22 of this manual. To carry out a combustion check refer to the in- structions given in the section 9.3 of this manual. Reference figures are given in the sections 4.5 or 4.6 of this manual (Flue gas figures). Check the soundness and integrity of the conden- sate drain pipe. Verify the cleanness and correct filling of the con- densate traps. 7.13 Instructing the user Hand over this combined User & Installation man- ual and the Service manual tothe end user and ex- plain how to use the unit in both c.h. and d.h.w. modes. Take the User step by step through the lighting in- structions. Show the User how to switch off the appliance quickly and indicate the position of the electric INSTALLATION supply isolator. Explain the proper use and adjustment of all sys- tem controls; this will ensure the greatest possible fuel economy. Explain the function and use of the function selec- tor. Explain and demonstrate the function of time and temperature controls (if fitted). Explain how to turn off the appliance for both short and long periods and advise on the precautions necessary to prevent damage should the appliance be inoperative when freezing condi- tions may occur. Fill in the details required on the Boiler Guarantee Certificate and hand to the User advising them to return the correct section for boiler Guarantee reg- istration. Finally, advise the User that, for continued safe and efficient operation, the appliance must be ser- viced by a competent person at least once a year. 37 8 GAS CONVERSION 8.1 Warnings The commissioning of this boiler and sys- tem must only be undertaken by a pro- fessionally qualified person in accordance with the requirements of the Gas Safety In- stallation and Use Regulations and be ap- proved by C.O.R.G.I. Components used to adapt it to the type of gas available must be genuine parts only. 8.2 Procedures 1 Check that the gas cock (14 in Fig. 8.1) fitted under the boiler is turned off and the appliance is switched off at the mains isolating spur. 14 Closed position MAINTENANCE Fig. 8.1 2 Remove the front panel of the case (see the section General accessand emptyinghydraulic circuits in the service manual). 3 Take off the lid of the sealed chamber. 4 Take the front panel of the combustion chamber off and remove the burner (29 on page 12). See section Ignition and detection electrodesin the service manualfor detailed in- structions. 5 Carry out the conversion for the type of gas, re- placing the burner injectors correctly. 6 Re---assemble the burner, the front panel of the combustion chamber and the lid of the sealed chamber. 7 Switch on the appliance at the mains isolating spur. 38 8 Turn the boiler OFF positioning the function se- lector 8 as indicated in Fig. 8.2. 10 9 8 7 6 Fig. 8.2 9 Disconnect the C.h. temperature probe NTC 25 in Fig. 8.3 25 Fig. 8.3 10 Keep pressed the reset button 7 for about 10 seconds until the lock---out signal lamp 6 blinks. 11 Connect the C.h. temperature probe NTC 25in Fig. 8.3 12 Press the reset button 7 repeatedly (4 times) until the lamps 10 give the indication as in Fig. 8.4 (gas type mode). Where: Lamp OFF Lamp ON Fig. 8.4 Atthisstep itis possible to visualize the currentset- ting by keeping the reset button 7 pressed for more than 5 seconds. The lamps 10 will flash a number of times corresponding to the setting of the knob 9 in Fig. 8.5. Gas conversion L.P.G. Gas type Setting No. NATURAL 1 GAS 9 Fig. 8.5 Gas Position of Approx. Max current supply knob 9 through the modulator device Natural 1 125 mA gas lamp 6 blinks quickly (2 per seconds) indicat- L.P.G. 4 165 mA Fig. 8.6 13 Tochange the setting turn the knob 9on a posi- tion corresponding to the gas used as shown in Fig. 8.5. By turning the knob 9, the lock---out signal ing that the setting has changed and must be memorised. 14 To memorize the setting keep pressed the reset button 7 for about 5 seconds until the lamps 10 briefly blinks simultaneously. 15 Open the gas cock (14 in Fig. 8.7) 14 Open position Fig. 8.7 16 To reset the boiler to the normal operation turn it ON by the function selector 8 on the desired operation and checking the ignition pressure and that the burner lights up uniformly. In any case, the boiler automatically resets to its nor- mal operation after 10 minutes. Factory setting = Natural gas (as illustrated) 17 Calibrate the gas valve according to the in- MAINTENANCE structions given in the service manual, section Modulating gas valve --- Adjustment. 18 Set the correct gas pressure for centralheating output required, see section 7.9 in this manual. 19 Stick on the inside of the left hand side panel adjacent to the data badge the self---adhesive label (included with the conversion kit) indicat- ing the type of gas, and the gas pressures to which the appliance has been set. Replace the adjustment protection cap. 20 Replace the front panels of the case. 39 9 MAINTENANCE 9.1 Warnings The procedures detailed in this chapter must be carried out only by a professionally qualified person. Thus you are advised to contact an Authorised Service Agent. For Ireland (IE), the servicing work must be carried out by a competent Person For efficient and continuous operation of the boiler you are advised to have, at least once a year, maintenance and cleaning done by an Approved Service engineer. Isolate the appliance from the electricity supply by turning off the fused spur isolation switch adjacent to the appliance and turn off the gas cock, before carrying out any pro- cedures, whatsoever, for cleaning, mainten- ance, opening or dismantling boiler panels. 9.2 Dismantling the external panels MAINTENANCE Front panel 1 Loosen the three screws A (Fig. 9.1). 2 Lift and remove the panel. Air---Flue exhaust Sampling points A Fig. 9.1 40 Side panels 3 Loosen the screws B. Bring the bottom of the panels away from the boiler and lift them, free- ing them from the top hooks (Fig. 9.2). B Reference figures are given in the sections 4.5,4.6 Fig. 9.2 9.3 Combustion analysis check If it is necessary tocarry outa combustion analysis remove the plugs indicated in Fig. 9.1. or 4.7 of this manual (Flue gas figures). 9.4 Cleaning the primary heat exchanger 1 Take off the front of the case. 2 Take off the removable front of the air---tight chamber and the front panelof thecombustion chamber. If you notice dirt on the fins of the primary heat ex- changer (31 on page 12): 3 cover the sloping surfaces of the burner (29 on page 12) entirely in a protectivelayer (sheetsof newspaper or similar). 4 Brush out the primary heat exchanger (31 on page 12) with a bristle paintbrush. 9.5 Checking the pressurisation in the expansion vessel Empty the central heating system as described in section General access and emptying hydraulic Maintenance circuits in the service manual and check that the pressure in the expansion vessel is not less than 1 bar. See also section 4.4 page 14 of this manual. If the pressure is lower, take steps to correct the pressure level. 9.6 Cleaning the burner The sloping and multi---gas type burner (29 on page 12) does not need special maintenance, but it is sufficient to dust it with a bristle paintbrush. To reach the burner: 1 Take off the front of the case. 2 Take off the removable front of the air---tight chamber and the front panelof the combustion chamber. 3 Brush out the burner with a bristle paintbrush. 9.7 Checking the flue Have the integrity of the flue outlet pipe (49 on page 13) air intake pipe (50 on page 13), checked periodically, the venturi device* (46 on page 13) cleaned and the efficiency of the flue safety circuit checked at least once a year. * For details see the section Fan, venturi device and air pressure switch in the service manual. For all the above maintenance operations it is ad- visable to call an approved Service Engineer. 9.8 Drain pipe inspection Check the soundness and integrity of the conden- sate drain pipe. Verify the cleaness and correct filling of the con- densate traps. 9.9 Visual inspection of appliance Visually inspect all water joints, seals and connec- tions for any evidence of leakage and retighten, grease or replace them as necessary. 9.10 Gas pressures and tightness Check appliance for gas tightness. Recheckoper- ational pressures and adjust as necessary as de- MAINTENANCE scribed in section 7.7 page 33 of this manual. 41 *1796211641* 17962.1164.1 0907 48A5 UK Biasi UK Ltd Newman Park, Western Way Wednesbury, WS10 7BJ Sales Tel No: 0121 506 1340 Sales Fax No: 0121 506 1360 Service Tel No: 0121 506 1350 Service Fax No: 0121 506 1370