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Ariston CLAS HE EVO, Installation And Servicing Instructions

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Ariston CLAS HE EVO Installation And Servicing Instructions Download Page 59

59

MAINTENANCE GUIDE

3.16 Manual Air vent

Tools    

 

TIME  

  5 min

Drain boiler (see 3.3)
Unscrew and lift the manual air vent from the exchanger

1

2

Remove the clip and the temperature sensor

3

IMPORTANT ! 

Do not use conducting paste for the contact 

sensors because it will alter the resistance value.

TEMPERATURE

RESISTANCE (kOhm)

0

27

10

17

20

12

25

10

30

8

40

5

50

4

Summary of Contents for CLAS HE EVO

Page 1: ...ructions CLAS HE EVO CLAS HE EVO System CONDENSING WALL HUNG GAS BOILER Country of Destination GB IE G C N 47 116 65 24 kW G C N 47 116 66 30 kW G C N 47 116 67 38 kW G C N 41 116 36 18 kW G C N 41 116 37 24 kW G C N 41 116 38 30 kW ...

Page 2: ...nsor Connection 26 Cylinder connection 26 Internal mechanical time clock Internal RF receiver for Ariston programmable room thermostat 27 Electrical Diagram 28 Commissioning 32 Initial Preparation 32 Electricity Supply 32 Filling the Heating System 32 Filling of the DHW System 32 Gas Supply 32 Water Treatment 32 First Igniton Operation 33 Ignition procedure 34 Test Function and Combustion Analysis...

Page 3: ...ting the ARISTON Technical and Customer Service Departments at High Wycombe TECHNICAL DEPARTMENT CUSTOMER SERVICE DEPARTMENT Tel 0333 240 7777 Tel 0333 240 8777 Fax 01494 459775 Fax 01494 459775 GUARANTEE The manufacturer s guarantee is for 5 years from the date of purchase The guarantee is invalidated if the appliance is not installed in accordance with the recommendations made herein or in a man...

Page 4: ...ent a potential hazard In the event of a fault and or malfunction turn the appliance off turn off the gas cock and do not attempt to repair it yourself Contact a qualified professional instead Before any maintenance or repair work is performed on the boiler make sure you have disconnected it from the electricity supply by switching the external bipolar switch to the OFF position and removing the f...

Page 5: ...olling ladders are positioned securely that they are suitably strong that the steps are intact and not slippery and that the ladders are fitted with handrails on either side of the ladder and parapets on the landing Personal injury caused by falling from a height Duringallworkcarriedoutatacertainheight generally with a difference in height of more than two metres make sure that parapets are used t...

Page 6: ...FF button 10 TIME CLOCK CLAS HE Evo System models optional 11 RESET button 12 Heating temperature adjustument button Digits indicating boiler status and temperature indication C error code signals Err menu settings Technical assistance request Flame detected with indication of power used or indication of operation shutdown Heating operation set Heating operation active Hot water operation set Hot ...

Page 7: ... C H Return temperature probe 6 C H Flow temperature probe 7 Silencer 8 Secondary heat exchanger 9 Gas valve 10 Trap 12 C H Pressure relief valve 14 C H Circuit filter 16 Circulation pump with air release valve 17 D H W Flow switch 18 Diverter valve 19 Low Water Pressure Switch 20 Modulating fan 21 Ignition electrodes 22 Ignitor 23 Thermal fuse 24 Combustion analysis test point CLAS HE EVO CLAS HE...

Page 8: ...tral Heating Flow B Domestic Hot Water Outlet C Gas Inlet D Domestic Cold Water Inlet E Central Heating Return F Safety Relief Valve 450 0 0 3 0 0 3 5 5 Minimum clearances In order to allow easy access to the boiler for maintenance operations The boiler must be installed in accordance with the clearances stated below 5 CLAS HE EVO CLAS HE EVO SYSTEM ...

Page 9: ...y rating dir 92 42 EEC stars Sedbuk class class A 90 A 90 A 90 1 Loss when stopped ΔT 50 C Loss of burner gas when operating 2 2 2 2 2 2 EMISSIONS Available air pressure Pa 100 100 100 NoX class class 5 5 5 Flue gas temperature G20 80 C 60 C C 64 64 64 CO2 content G20 80 C 60 C 9 0 9 0 9 0 CO content 0 O2 80 C 60 C ppm 119 101 98 O2 content G20 80 C 60 C 4 5 4 5 4 5 Maximum flue gas flow G20 80 C ...

Page 10: ... 87 9 97 6 87 9 97 5 87 8 Efficiency rating dir 92 42 EEC stars Sedbuk Band Rating Band A 90 1 A 90 0 A 90 0 Loss when stopped ΔT 50 C Loss of burner gas when operating 2 0 2 2 2 2 EMISSIONS Available air pressure Pa 100 100 100 NoX class 5 less than 70mg kWh class 5 5 5 Flue gas temperature G20 80 C 60 C C 61 64 64 CO2 content G20 80 C 60 C 9 0 9 0 9 0 CO content 0 O2 80 C 60 C ppm 93 119 101 O2 ...

Page 11: ...talling the boiler where the air inlet can be polluted by chemical products such as chlorine swimming pool area or ammonia hair dresser or alkalin products launderette Flue Detailed information on flue assembly can be found in the Connecting the Flue section The boiler must be installed so that the flue terminal is exposed to the free passage of external air at all times and must not be installed ...

Page 12: ...nhibitor Any treatment of water by additives in the system for frost protection or for corrosion inhibition has to be absolutely suitable for all metals used in the circuit The use of a corrosion inhibitor in the sysem such as Fernox MB 1 BetzDearborn Sentinel X100 or Fernox System Inhibitor is recommended to prevent corrosion sludge damaging the boiler and system If anti freeze substances are to ...

Page 13: ...imum water seal of 75mm and an air break must be incorporated in the pipe run as above iii Terminating into a gully below the grid level but above the water level iv Into a soakaway Note If any condensate pipework is to be installed externally then it should be kept to a minimum and be insulated with a waterproof insulation and have a continuous fall The total length of external pipe used should n...

Page 14: ...onnections Safety Valve Discharge The pressure relief valve pipe is made of copper It should terminate below the boiler safely outside the premises Care should be taken that it does not terminate over an entrance or window or where a discharge of heated water could endanger occupants or passers by Warning Do not apply heat to the copper safety valve outlet pipe whilst it is connected to the 3 bar ...

Page 15: ...ctrical power supply using the external bipolar switch removing the fuse and shutting off the gas valve To access the inside of the boiler the following is necessary 1 Remove the casing by unhooking it from the control panel a 2 Loosen the two screws on the front casing b pull it forwards and unhook it from the upper pins c 3 Lower the control panel d 4 Unhook the two clips on the combustion chamb...

Page 16: ...ossible but not necessary to fit a safety thermostat onto the underfloor heating outlet For the electrical connection of the thermostat see the section on Electrical connections page 25 If the outlet temperature is too high the boiler will stop both domestic hot water and the heating production and the error code 1 16 floor thermostat contact open will appear on the display The boiler will restart...

Page 17: ... By pass 11 Drain valve 12 Condensate trap 13 Filling loop 14 C H circuit filter 15 D H W Flow switch 16 diverter valve 17 water pressure sensor 18 circulation Pump 19 expansion vessel 20 modulating Fan 21 ignition electrodes 22 thermal fuse Water circuit diagram 1 4 3 11 8 10 12 14 17 18 19 20 21 22 6 5 A C E 1 4 3 11 8 10 12 13 14 15 16 17 18 19 20 21 22 7 6 5 A A B B C C D D E E ...

Page 18: ... steaming must be considered If the terminal is less than 2 metres above a balcony above ground or above a flat roof to which people have access then a suitable stainless steel terminal guard must be fitted The minimum acceptable spacing from the terminal to obstruc tions and ventilation openings are specified in Fig 1 A Directly below an opening window etc 300 mm B Horizontally to an opening wind...

Page 19: ...ble for an exact X dimension of 753mm Measure the distance from the face of the external wall to the face of the flue elbow X Fig 2 this figure must now be subtracted from 753mm you now have the total amount to be cut from the plain end of the flue Draw a circle around the outer flue and cut the flue to the required length taking care not to cut the inner flue next cut the inner flue ensuring that...

Page 20: ... it is simply necessary to push them together no clamps are necessary to secure the flue components Before proceeding to fit the flue ensure that the maximum flue length has not been exceeded See the tables and that all elbows and bends have been taken into consideration for each additional 90 elbow 1 metre must be subtracted from the total flue length and for each 45 0 5 metres must be subtracted...

Page 21: ...e there is no need to use a clamp to secure this as it is a push fit connection the vertical flue kit must then be inserted through the roof flashing this will ensure that the correct clearance above the roof is provided as the terminal is a fixed height Should extensions be required they are available in 1 metre Part No 3318077 500mm Part No 3318078 and they must be connected directly to the vert...

Page 22: ... lip seal is not dislodged when assembling the flue greasing the seal will aid assembly Twin pipe can also be converted back to Coaxial flue to enable vertical termination with a coaxial kit by using the pipe bridge Twin Coaxial Adaptor Part No 3318089 When running the twin flue pipe vertically It is not possible to terminate concentrically horizontally Termination is only possible with separate a...

Page 23: ...ust gas ducts 2 If you need to insert elbows in the air intake and exhaust gas ducts you should consider for each one the equivalent length to be included in the calculation of developed length 3 The exhaust gas duct should jut above the roof by at least 0 5 m 4 The intake and exhaust gas ducts in Type C13 C53 must be installed on the same wall or where the exhaust is vertical and the air intake h...

Page 24: ...nsion Exhaust air m Diameter of pipe mm CLAS HE EVO CLAS HE EVO SYSTEM 24 30 38 18 24 30 Coaxial System C13 C33 C43 12 10 7 14 12 10 ø 60 100 C13 C33 C43 36 30 20 42 36 30 ø 80 125 Twin pipe System S1 S2 ø 80 80 C13 24 24 26 26 16 16 36 36 24 24 26 26 C33 40 40 50 50 28 28 60 60 40 40 50 50 C43 24 24 26 26 16 16 36 36 24 24 26 26 C53 S1 S2 S1 S2 60 50 35 50 60 50 ø 80 80 TYPE C13 TYPE C33 TYPE C53...

Page 25: ...ppliance by use of a fused double pole isolator having a contact separation of at least 3mm in all poles or alternatively by means of a 3A fused three pin plug and unswitched shuttered socket outlet both complying with BS1363 The use of multiplugs extension leads or adaptors is strictly prohibited It is strictly forbidden to use the piping from the hydraulic heating and gas systems for the applian...

Page 26: ...rol panel cover and the front casing Refer to page 39 for setting the parameters when using the outdoor sensor NOTE WHEN CONNECTING THE BOILER TO EXTERNAL CONTROLS DO NOT RUN 240V CABLES AND CABLES FOR SWITCHING CIRCUITS WHICH ARE LOW VOLTAGE TOGETHER USE SEPERATE CABLES TO PREVENT INDUCED VOLTAGE ON THE LOW VOLTAGE CIRCUITS Connector SE on PCB Outdoor Sensor Connector TA on PCB low voltage switch...

Page 27: ... blanking plate or existing clock if fitting the RF receiver in a product with an existing mechanical clock from the front control panel of the boiler Using the 4 securing screws supplied with the clock accessory secure the clock RF receiver into position ensuring the accessory is oriented correctly Connect the wires to the clock accessory using the spade connectors see fig 1 for wiring configurat...

Page 28: ...ermal fuse D H W flow switch Switch ON OFF Br Rd Rd Bl Bl Br Br Bk Bk Bk BUS Remote Control modulating device TA2 FLOOR Underfloor heating thermostat Room Thermostat 2 SE Outdoor Sensor SOL Solar temperature probe TA1 Room thermostat 1 HV connection CN14 CN3 1 1 CN8 CN9 1 1 CN25 1 1 CN6 N N FLAME L L CN19 CN4 Bk Bk Gr Wh Rd Bl Modulating Fan Detection electrode Gas valve Ignitor Diverter valve Cir...

Page 29: ...rmostat Room Thermostat 2 SE Outdoor Sensor SOL Solar temperature probe TA1 Room thermostat 1 HV connection CN14 CN3 1 1 CN8 CN9 1 1 CN25 1 1 CN6 N N FLAME L L CN19 CN4 Bk Bk Gr Wh Rd Bl Modulating Fan Detection electrode Gas valve Ignitor Circulation Pump Bk Bk Bk Bk Br Bl CN2 CN11 1 1 N N FLAME L L BUS T B TA2 FLOOR SE TNK SOL TA1 CN19 CN1 CN4 1 Peripheral unit LV connections HV connections CN14...

Page 30: ...RMINAL STRIP C H 2 PORT VALVE 240V 3AMP L N E L N Remove Link CYL STAT ON OFF L N H W 2 PORT VALVE Boiler HW CH BUS TA2 SE TNK SOL TA1 Note Boiler switching on TA1 is low voltage use a seperate cable to supply TA1 Do not use 5 core cable MOTOR N L MOTOR ON OFF S plan wiring diagram ...

Page 31: ...W 2 PORT VALVE Outside sensor Boiler Change parameter 223 from 0 to 1 521 from 1 to 3 421 from 1 to 0 Activate Auto Function BUS TA2 SE TNK SOL TA1 Note Boiler switching on TA1 TA2 is low voltage Use a separate cable to supply TA1 TA2 Do not mix high voltage and low voltage wires in the same cable MOTOR N L MOTOR ON OFF S plan wiring diagram using an outside sensor ...

Page 32: ... MANUAL AIR VENT FAILURE TO VENT ADEQUATELY MAY DAMAGE THE HEAT EXCHANGER PAGE 7 LEGEND 2 Filling of the DHW System Close all hot water draw off taps Open the cold water inlet cock supplied with the connection kit Slowly open each draw off tap and close them only when clear water free of bubbles is visible Gas Supply Inspect the entire installation including the gas meter and test for tightness Th...

Page 33: ...lic water tightness Complete 8 Spin the pump Complete 9 Purge the air with once pressing on ESC button during 5 sec Complete 10 Set the heating power Complete 11 Balance the central heating circuit Complete 12 Check the operation in DHW mode Complete 13 Adjust DHW flow rate on the boiler if necessary Complete 15 Check gas rate Complete 14 Check combustion by pressing the RESET button for 5 sec Com...

Page 34: ...s See below If you need to stop it press ESC alternatively it is possible to manually vent the heat exchanger At the end check that the system is completely deaerated and if not repeat the procedure Bleed the air from the radiators The exhaust duct for combustion products should be suitable and free from any obstructions Any necessary ventilation inlets in the room should be open type B installati...

Page 35: ...conds WARNING When the cleaning function is activated the temperature of the water coming out of the boiler may be more than 65 C On the display appear TEST and the icon The boiler is foced to the maximum heating power Rotate the encoder to forced the boiler at the maximum DHW power On the display appear the icon Wait 1 minute for the boiler to stabilise before carrying out the combustion analyses...

Page 36: ... power shown on the display as 1 i e 1 To check the slow ignition power access menu 2 sub menu 2 parameter 0 Heating ignition delay adjustment This parameter menu 2 sub menu 3 parameter 5 can be used to manually 0 or automatically 1 set the delay time before the subsequent reignition of the burner after it has switched off on reaching the desired temperature in central heating mode By selecting ma...

Page 37: ...emperature increase in steps of 4 C may be set The value varies according to the type of system and installation If the Boost Time value 00 the function is not activated Example 2 Single zone system high temperature with on off room Thermostat outdoor sensor In this case the following parameters must be set 4 21 Activation of temperature adjustment using sensors Select 3 outdoor sensor only 4 22 T...

Page 38: ...ontactanauthorisedTechnical Service Centre for assistance For safety reasons the boiler will permit a maximum of 5 resets in 15 minutes 5 presses of the RESET button at the 6th attempt within this 15 minute period the boiler will shut down and may only be operated again after the electricity supply has been disconnected If the shutdown is occasional or an isolated event this is not a problem The f...

Page 39: ...ner will fire heating position until a temperature of 30 C is detected If the central heating flow temperature is 3 C the burner will fire heating position at minimum power until the temperature rea ches 30 C the burner will go out If lockout is caused by overheat the burner will not fire but the pump will continue to run heating position The anti frost device activates only when with the boiler o...

Page 40: ...oiler 8 3 Boiler Temperature 8 4 Solar Storage 8 5 Service 8 6 Error History The parameters relating to each individual menu are listed in the following pages The various parameters can be accessed and modified using the OK button and the encoder see fig below The description of the menus and of each individual parameter will be shown on the display 6 ESC button 7 encoder programming knob 8 OK but...

Page 41: ... 2 2 9 Set boiler heat power 2 3 BOILER PARAMETER PART 1 2 3 1 Maximum heating power setting from 0 to 99 60 see the Gas setting table information on Starting 2 3 2 Domestic hot water maximum percentage CANNOT BE MODIFIED from 0 to 99 RESERVED FOR TECHNICAL ASSISTANCE Only if the gas or PCB is changed see gas setting table 2 3 3 Minimum percentage CANNOT BE MODIFIED from 0 to 99 2 3 4 Heating maxi...

Page 42: ...he appliance allows the hot water heating comfort to be increased via the COMFORT function This function keeps the secondary exchanger temperature stable when the boiler is not in use When the function is active the display shows COMFORT Note this function can be activated and deactivated by pressing the COMFORT button 2 5 1 Comfort Anti cycling Time CLAS HE EVO from 0 to 120 minutes 0 2 5 2 Hot w...

Page 43: ...20 0 20 4 2 ZONE 1 SETTING 4 2 0 Heating appliance temperature value setting 0 from 20 to 45 C low temperature 1 from 35 to 85 C high temperature select in the appliance type base 4 2 1 Basic heating control type selection type depending on the peripheral devices connected 0 fixed flow temperature 1 device On Off 2 room sensor 3 external sensor only 4 room sensor external sensor 1 To activate heat...

Page 44: ...ctivated only with temperature control and fixed temperature see 521 from 20 to 45 C high temperature para 420 0 20 5 2 ZONE 2 SETTING 5 2 0 Heating appliance temperature value setting 0 from 20 to 45 C low temper ature 1 from 35 to 85 C high temperature 1 select in the appliance type base 5 2 1 Basic heating control type selection type depending on the peripheral devices connected 0 fixed flow te...

Page 45: ...lay lights up the AUTO symbol 6 2 2 Slope from 0_2 to 0_8 low temperature from 1_0 to 3_5 1_5 high temperature see graph on page 42 If the external sensor is used the boiler calculates the most suitable heating flow temperature taking the external temperature and the type of appliance into account The type of curve must be chosen according to the type of appliance radiator and the heat losses pres...

Page 46: ...eating backflow temperature in C 8 4 SOLAR STORAGE 8 4 2 Solar appliance water input temperature activated only with the solar kit connected 8 5 SERVICE 8 5 0 Months to next maintenance from 0 to 60 month 24 If setted the boiler will display that is time to call the installer for maintenance 8 5 1 Enable Maintenance advice 0 OFF 1 ON 0 8 5 2 Maintenance Warning Reset Reset OK Yes Esc No to erase t...

Page 47: ...in the OFF position and shut off the gas valve Loosen the automatic air relief valve Open the system drain off cock and collect the escaping water in a container Empty the water from the lowest points of the system where applicable If the system is to be left inactive in areas where the room temperature may fall below 0 C during winter we recommend that anti freeze liquid is added to the water in ...

Page 48: ...ERAL ACCESS 1 1 General Access Tools TIME 3 min Unclip the cover to remove 1 Remove the two screws 2 Remove the front panel 3 Lower the electrical front panel 4 Remove the combustion chamber front panel by releasing the clips 5 ...

Page 49: ...IDE 2 ELECTRICAL UNIT 2 1 Control box access Tools TIME 4 min Remove the front panel as above and pivot the electricl box 1 Unhook the two clip and rotate the cover 2 3 Unscrew the two screws and remove the cover 3 4 5 ...

Page 50: ...UIDE 2 2 Fuse Tools TIME 5 min Open the control box as above 1 Remove the fuse 2 3 2 3 Main P C B Tools TIME 5 min After opening the control box disconnect the elctrical plug connections 1 Unhook and remove the P C B 2 ...

Page 51: ...51 MAINTENANCE GUIDE 2 4 Display P C B Tools TIME 5 min Unscrews the two screws and pull the assembly towards you 1 Disconnect the elctrical plug connections and unhook and remove the P C B 2 3 ...

Page 52: ...filter 8 D H W flow switch assembly 9 Central Heating return 10 Cold water inlet D H W 11 C H drain valve 3 2 3 Way valve unit Tools TIME 5 min Unplug the diverter valve cable 1 Remove the clip and lift the motor from the diverter valve body 2 Drain the boiler see 3 3 Remove the clip and lift the diverter valve from the assembly 3 When reassembling ensure the diverter valve is aligned correctly 4 ...

Page 53: ...he boiler 1 3 4 Automatic air vent Tools TIME 5 min Drain the boiler see 3 3 Remove the clip and lift the AAV from the assembly 1 2 3 5 Primary water pressure sensor Tools TIME 5 min Drain the boiler see 3 3 Slide the fixing clip it is held captive unplug the electrical connector and lift the sensor from the assembly 1 2 ...

Page 54: ...ump Tools TIME 10 min Drain the boiler see 3 3 Remove the clip and the two screws 1 Disconnect the pipe and then move the pump to the right to disengage 2 Remove the pump 3 Remove the sensor see 3 5 4 Remove the AAV see 3 4 5 6 ...

Page 55: ...ME 10 min Drain the boiler see 3 3 Remove the clip and pull the flow switch assembly towards you 1 Twist the flow switch assembly to disengage 2 3 7 C H Filter Tools TIME 5 min Drain the boiler see 3 3 Remove the clip and remove the filter 1 Remove the filter 2 ...

Page 56: ... min Drain primary and domestic hot water circuits Remove the two screws and remove the heat exchanger 1 2 3 9 LEFT HAND HYDRAULIC BLOCK ASSEMBLY Legend 1 Left hand hydraulic block 2 By pass assembly 3 Safety valve 4 Central heating flow 5 Domestic hot water outlet ...

Page 57: ...rap Tools TIME 5 min Unscrew the condensate trap from the condensate body 1 3 13 Safety valve Tools TIME 5 min Drain the boiler see 3 3 Disconnect the discharge pipe Remove the fist clip on the left and pull the safety valve towards you 1 2 ...

Page 58: ...y pass assembly Tools TIME 5 min Drain the boiler see 3 3 Remove the second clip and pull the assembly towards you 1 2 3 3 15 Temperature sensors Tools TIME 5 min NTC1 Black NTC2 Red 1 Unplug the electrical connectors 2 NTC1 NTC2 ...

Page 59: ... 3 Unscrew and lift the manual air vent from the exchanger 1 2 Remove the clip and the temperature sensor 3 IMPORTANT Do not use conducting paste for the contact sensors because it will alter the resistance value TEMPERATURE RESISTANCE kOhm 0 27 10 17 20 12 25 10 30 8 40 5 50 4 ...

Page 60: ...3 3 Remove the silencer 1 Remove the two clips and disconnect the pipes Isolate the gas supply and disconnect the gas pipe Remove the four screws 2 Remove the burner unit 3 Remove the four screws to free the heat exchanger 4 Unscrew and lift the manual air vent from the exchanger 5 ...

Page 61: ...61 MAINTENANCE GUIDE 4 BURNER UNIT 1 2 3 4 5 6 7 8 Legend 1 Burner 2 Silencer 3 Gas diaphram 4 Mixing tube 5 Fan 6 Detection electrode 7 Ignition electrode 8 Spark generator ...

Page 62: ...rator Tools TIME 5 min Unplug the ignition electrode from the spark generator 1 Remove the screws and the spark generator 2 4 2 Electrodes Tools TIME 5 min Unplug the electrodes 1 Remove the screws and pull the electrodes towards you 2 3 ...

Page 63: ...ten screws to free the burner door 4 Pull the burner toward you Replace any gaskets that are damaged or showing signs of deterioration 5 1 3 2 Fan mixer venturi according to the model Power Length Venturi diameter 18 kW 104 6 mm Ø 14 24 kW 104 6 mm Ø 17 30 kW 135 8 mm Ø 21 38 kW 167 mm Ø 25 Legend 1 Stainless steel Burner 2 Ignition electrode 3 Detection electrode ...

Page 64: ...ion assembly see 4 3 1 Remove the three screws to free the fan 2 Legend 1 Fan 2 Venturi 3 Gasket Fan mixer venturi according to the model Power Fan Venturi diameter 18 kW EBM RG 118 40 W Ø 14 24 kW EBM RG 118 40 W Ø 17 30 kW EBM RG 118 40 W Ø 21 38 kW EBM RG 118 40 W Ø 25 ...

Page 65: ...ve Tools TIME 15 min Remove the two screws under the boiler and disconnect the gas pipe on the top of the gas valve 1 Remove the gas valve 2 Legend 1 Gas valve 2 Solenoids 3 Throttle adjustment 4 Offset adjustment 5 Inlet test nipple ...

Page 66: ...essary Flow switch operation Maintenance Interval Annually How Visual inspection Clean as necessary Check flow rate Expansion vessel Maintenance Interval Annually How Check air pressure is at 1 bar System drained Ignition detection electrodes Maintenance Interval Annually How Visual inspection Clean as necessary Distance from the burner Ionisation current more than 1 μA Burner Maintenance Interval...

Page 67: ...ean as necessary Condensate trap Maintenance Interval Annually or after cleaning primary heat exchanger How Visual inspection Clean as necessary Add water before replacing Pump Maintenance Interval At the first ignition and annually How Check that the AAV is open Visual inspection Clean as necessary ...

Page 68: ......

Page 69: ...ffect the customer s statutory rights If yes and if required by the manufacturer has a water scale reducer been fitted CONDENSING BOILERS ONLY The condensate drain has been installed in accordance with the manufacturer s instructions and or BS5546 BS6798 Yes If the condensate pipe terminates externally has the pipe diameter been increased and weatherproof insulation fitted Yes ...

Page 70: ...eer Name Company Name Telephone No Gas Safe Register No Comments Signature Date Engineer Name Company Name Telephone No Gas Safe Register No Comments Signature Date Engineer Name Company Name Telephone No Gas Safe Register No Comments Signature Date Engineer Name Company Name Telephone No Operative ID No Comments Signature Date Engineer Name Company Name Telephone No Gas Safe Register No Comments ...

Page 71: ......

Page 72: ...010439400 Ariston Thermo UK Ltd Hughenden Avenue High Wycombe Bucks HP13 5FT Telephone 01494 755600 Fax 01494 459775 Internet www ariston co uk Technical Advice 0333 240 7777 Customer Service 0333 240 8777 ...

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