TABLE OF CONTENTS SERVICING INSTRUCTIONS EPLACEMENT OF ARTS ENERAL CCESS - Removing the front panel - Removing the sealed chamber front cover - Removing the side panels CCESS TO THE OMBUSTION HAMBER - Removing the combustion cover - Removing the burner and jets - Removing the electrodes - Removing the main heat exchanger - Removing the air pressure switch...
2. The control panel moves downward and when pulled forward, SERVICING INSTRUCTIONS rotates on two lateral hinges; the panel stays in a semi- horizontal position, which allows access to the inner parts of To ensure efficient safe operation, it is recommended that the the boiler (F .
1.2.2 Removing the sealed chamber front cover 1.2.3 Removing the side panels 1. Remove the screws “C” (F . 1.6); 1. Remove the four screws “D” for each side panel (F .1.8); 2. Lift the sealed chamber front cover from the locating pins 2.
CCESS TO THE OMBUSTION HAMBER 1.3.1 Removing the combustion cover 1. Remove the screws “E” (F . 1.9); 2. Lift off the combustion cover. Fig. 1.11 1.3.3 Removing the electrodes Before carrying out this procedure, unscrew and slide the burner forward (see previous section). 1.
3. Remove screw “H” (F . 1.14); 1.3.4 Removing the main heat exchanger 4. Gently slide the electrode downward (F . 1.15). 1. Drain the boiler of water; 2. Release the overheat thermostat sensor “I” (F . 1.16); 3. Release the two connection nuts “J” connecting the exchanger to the flow and return pipes (F .
1.3.5 Removing the air pressure switch 1.3.6 Removing the fan 1. Disconnect the electrical connections “K” and silicone 1. Disconnect electrical connections “N” and “O” silicon pipe pipes “L” from their connection points (F . 1.19); .1.22); 2. Remove screws “M” on the top of the sealed chamber 2.
ERVICING AND EMOVAL OF THE ALVE Setting the maximum power of the boiler 1.4.1 Setting the gas pressures 1. Check that the supply pressure to the gas valve is a minimum of 20 mbar for natural gas. Turn off the gas supply at the isolation point under the boiler 2.
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6. Remove the pipe from the pressure gauge and connect screw “C” to the pressure outlet in order to seal off the gas. 7. Carefully check the pressure outlets for gas leaks (valve inlet and outlet). IMPORTANT! Whenever you disassemble and reassemble the gas connections, always check for leaks using an approved soap and water solution.
1.4.2 Removing the spark generator 1.4.3 Removing the gas valve 1. Disconnect ignition leads “S” by pulling upward Important! Before removing the gas valve, ensure the gas . 1.26); supply is turned off. 2. Remove the screw “T” (F . 1.27); 3.
1. 5. 2 Removing the safety valve CCESS TO THE ATER IRCUIT 1. Loosen nut “Y” (F . 1.33); Important! Before any component is removed, the boiler 2. Disconnect the discharge pipe work from below the must be drained of all water. boiler;...
1.5.6 Removing the overheat thermostat 1. Disconnect overheat thermostat electrical connections “K1” (F . 1.48); 2. Then remove the thermostat from its mounting by releasing the securing clip (F . 1.49). . 1.51 1.5.8 Removing the regulation thermostat 1. Remove the regulation thermostat sensor from its .
1.6.2 Removing the P.C.B.s CCESS TO THE ONTROL YSTEM 1. Isolate electricity; 2. Remove the screws “O1” (F . 1.56); Important! Isolate the electrical supply to the boiler before 3. Separate the facia panel from the rear of the control accessing the control panel.
FAULT FINDING It is possible to detect and correct any defect by using the standard fault AULT INDING UIDE finding diagrams described in this chapter. CHARTS RELIMINARY CHECKS MAKE SURE THAT 1 - T HERE IS SUFFICIENT WATER IN THE SYSTEM 2 - T HE GAS IS TURNED ON 3 - T...
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IS THE PUMP RUNNING? POWER T O THE PUMP? 1 - C HECK THE PUMP CABLE P.C.B. HECK EPLACE (CT1) 3 - C HECK THE SYSTEM PRESSURE GAUGE IS AT 1 - C HECK THE OPERATION OF THE PUMP 2 - R ELEASE EPLACE THE PUMP...
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1 - C HECK AIR PRESSURE SWITCH CABLE IS THE CHECK mbar 2 - C HECK EPLACE AIR AIR PRESSURE SWITCH P ON PRESSURE PRESSURE SWITCH ACTIVATED? TEST POINT 3 - C P.C.B. HECK EPLACE (CBM2) P 0.5 mbar 1 - C HECK EXHAUST DISCHARGE 2 - C HECK VENTURI AND TUBES...