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36

18

Ignition and detection electrodes,

burner and spark generator

18.1

Function

Three electrodes are fitted on the fan---burner group.

Two of them, fitted on the left side of the fan---burner

group

A

, are the ignition electrodes

B

and are con-

nected to the spark generator

C

.

On the right side is the detection electrode

D

and it de-

tects the presence of the flame.

B

C

D

I

I

F

G

H

A

J

J

I

Fig. 18.1

The burner

E

is fitted on the rear of the fan---burner

group A.

D

A

Fig. 18.2

18.2

Removal of the Ignition and detection

electrodes

Warning: isolate the boiler from the mains

electricity supply before removing any

covering or component.

1

Remove all the case panels and the sealed

chamber lid (see section 2) .

2

Disconnect the ignition electrodes connector

F

and the earth wire

G

from the spark generator

(Fig. 18.1) and disconnect the detection elec-

trode connector

H

.

3

Unscrew the screws

I

and remove the ignition

electrodes B and the detection electrode D

(Fig. 18.1).

4

Assemble the Ignition and detection electrodes

carrying out the removal operation in reverse or-

der.

When reassembling the ignition electrodes be sure

to connect correctly the wires to the spark genera-

tor (see Fig. 18.3)

C

earth wire

ignition electrodes

wire

Fig. 18.3

18.3

Removal of the burner

Warning: isolate the boiler from the mains

electricity supply before removing any

covering or component.

Содержание M110.24SM/E

Страница 1: ...Wall hung fan flue room sealed high efficiency gas boiler Service manual GARDA PLUS HE Models G C Appl No M110 24SM E 47 970 31 M110 32SM E 47 970 32 Leave this manual adjacent to the gas meter...

Страница 2: ...oval of the gas valve 25 12 Primary circuit flow switch 27 12 1 Function 27 12 2 Checks 27 12 3 Removal 27 13 Expansion vessel and temperature pressure gauge 28 13 1 Function 28 13 2 Checks 28 13 3 Re...

Страница 3: ...sion vessel Detection electrode valve Condensing Diverter valve Main circuit Flue temperature heat exchanger Condensate trap flow switch C h temp probe probe NTC Air restrictor Gas restrictor Transfor...

Страница 4: ...2 2 lift the panel and remove it A Fig 2 2 To remove the side panels loosen the screws B and C Fig 2 3 bring the base of the panels away from the boiler and lift them freeing them from the top hooks...

Страница 5: ...holds the cable G H Fig 2 6 9 Pass the terminal block connected to the boiler through the hole of the control panel lid Fig 2 7 Fig 2 7 10 Remove the screws I and remove the control pan el lid Fig 2 5...

Страница 6: ...emptied 4 To help the draining of the primary circuit loose the condensing heat exchanger air purger valve M M Fig 2 10 Attention some water could remain in the condens ing heat exchanger 5 Close drai...

Страница 7: ...1 X12 X13 X17 X23 X24 P3 X14 X15 SB1 X16 X22 X9 bu bn bu bn bu bu bn bn 1 2 3 L N gnye bu bn bn bk bu bn bu gnye bn bk bu bn gnye bu M rd bk wh 3 2 1 gnye bn bu rd wh bk bu bn gnye gnye bu bn bu gnye...

Страница 8: ...on only during d h w operation 230 Safety thermostat 0 Fan 0 Main circuit LD1 LD2 LD3 F1 F2 F3 K1 K2 K3 K4 LD4 P6 T3 X1 X2 X3 X5 X6 X7 X10 X11 X12 X13 X17 X23 X24 P3 X14 X15 SB1 X16 X22 X9 Supply netw...

Страница 9: ...gauge By pressing the reset push button the boiler turns on and operates cor rectly J J J J J J J J J J By pressing the reset push button the boiler starts the ignition cycle The burner doesn t light...

Страница 10: ...h mode J J J 8 J OFF Low d h w flow rate J J J Water leaks from the safety valve dur ing operation on c h J J J J J Water leaks from the safety valve when the boiler is off J J Note Useful informatio...

Страница 11: ...C 5 2 Removal Warning isolate the boiler from the mains electricity supply before removing any covering or component 1 Disconnect the flue system from the boiler 2 Remove the air box following the in...

Страница 12: ...N P R U T T Fig 5 6 14 Unscrew the screws S and remove the clamps Fig 5 4 15 Unscrew the screws T and remove the support U Fig 5 6 16 Remove the Condensing heat exchanger by levering it and sliding i...

Страница 13: ...re removing any covering or component 1 Remove the front and right hand side panels of the case 2 Empty the primary circuit and the d h w circuit of the boiler 3 Completely unscrew the two Allen key s...

Страница 14: ...rotor in the direc tion of the arrow If there is a defect in starting the rotor will begin to turn normally only starting it manually n Check that the impeller is integral with the rotor With the boil...

Страница 15: ...B brass spindle when the boiler operates in c h mode In both figures the relationship between the position of the actuator and the resistance of the motor windings the motor must be disconnected from...

Страница 16: ...ch G 5 Disconnect d h w temperature probe H 6 Unscrew the connector I the c h flow connector and the d h w outlet connector F G I H Fig 8 5 7 Remove the d h w heat exchanger see section 6 2 8 Remove t...

Страница 17: ...od in which it is activated and supplies the fan regu lating its speed The Electronic control ignition p c b has a safety func tion and any incorrect interventions or tampering can result in condition...

Страница 18: ...s it possible to separately adjust the c h waterflow temperatureand d h w outlet temperature The temperature of the water is converted into an elec tric signal by means of temperature probes The user...

Страница 19: ...aning A short pulse every 4 seconds Boiler in stand by condition function control in position Anti freeze system active 1 second ON 1 second OFF Boiler ON condition function control in or position Wit...

Страница 20: ...hat the setting has changed and must be memo rised Knob position Maximum useful output in c h mode non condensing kW BTU h M110 24SM M110 32SM 1 5 8 19 788 10 6 36 165 2 10 3 35 142 13 2 45 036 3 13 8...

Страница 21: ...optional is fitted the coefficient K has also to be set as described in the Commissioning chapter of the installation man ual 1 Gain access to the parts located inside the con trol panel as explained...

Страница 22: ...and re insert the spindle 12 Make sure that the settings comply with the in dications given in section 9 5 13 Operate the boiler and close the gas inlet cock so that the boiler goes into the safety l...

Страница 23: ...than 110 C YES NO beginning of wait period flame presence End of wait period YES NO YES starts ignition discharges Opens gas valve beginning of ignition period flame presence YES interrupts ignition...

Страница 24: ...k Is fan rpm exact NO YES Is flue temperature higher than 110 C YES NO beginning of wait period flame presence End of wait period YES NO YES starts ignition discharges Opens gas valve beginning of ign...

Страница 25: ...out the re moval operations in the reverse order After reassembling ensure the wires are correctly connected see Fig 10 2 larger connector larger connector smaller connector smaller connector clamp f...

Страница 26: ...e 5 Turn on the electricity supply to the boiler switch ing on the fused spur isolation switch The appliance operation light on the left will flash every 4 seconds 6 Set the function knobs as illustra...

Страница 27: ...d turn off the hot water tap s 26 Close the air flue sampling points 27 After adjustment fit the protective brass plug 1 Fig 11 2 Important after the gas pressure checks and any adjustment operations...

Страница 28: ...the plastic screw 1 Fig 11 2 fully clockwise until it stops Do not overtight 9 Turn it counter clockwise 2 and 3 4 turns 10 Adjust the gas valve using the flue analyser as de scribed in section 11 3 A...

Страница 29: ...r in d h w or c h mode 3 Looking through the switch box verify the position of the shaft B referring to Fig 12 2 B Boiler OFF Boiler ON Fig 12 2 n Electrical check It is possible to verify the general...

Страница 30: ...r manual and installation instructions for the correct value 13 3 Removal of the expansion vessel If there is at least 400 mm clearance above the boiler and the rear exit flue can be easily removed th...

Страница 31: ...9 Filter 10 Spring seat 5 6 4 9 2 8 7 3 1 Fig 14 3 14 3 Checks Warning isolate the boiler from the mains electricity supply before removing any covering or component n Flow switch sensor operation 1 R...

Страница 32: ...th a 10 litre min flow limiter If on the M110 32SM model the flow rate of the d h w circuit is too high it is possible to limit it by installing a flow limiter The following sizes are available Nomina...

Страница 33: ...ectricity supply before removing any covering or component Disconnect the cable from the Temperature probe Measure the temperature of the brass group where the Temperature probe is located and check t...

Страница 34: ...Temperature probe 32 B Fig 15 4...

Страница 35: ...fitted on the rear side of the div erter group A Fig 16 1 16 2 Removal Warning isolate the boiler from the mains electricity supply before removing any covering or component 1 Remove all the case pane...

Страница 36: ...boiler from the mains electricity supply before removing any covering or component 1 Turn off the gas supply 2 Remove all the case panels and the sealed chamber lid see section 2 C F E H G I Fig 17 2...

Страница 37: ...mble the Air box carrying out the removal operations in reverse sequence M I Fig 17 6 Warning After cleaning or replacement as detailed above if it deemed necessary to undertake a combustion analysis...

Страница 38: ...supply before removing any covering or component 1 Remove all the case panels and the sealed chamber lid see section 2 2 Disconnect the ignition electrodes connector F and the earth wire G from the s...

Страница 39: ...ns of section 17 2 from step 1 to step 8 3 Unscrew the nuts J Fig 18 1 and remove the cover of the combustion chamber 4 Remove the front insulation panel Fig 18 5 5 Assemble the new front insulation c...

Страница 40: ...ignition elec trodes Fig 18 9 spark generator connector C earth wire ignition electrodes wire S S Fig 18 9 3 Unscrew the screws S and remove the spark gen erator 4 Assemble the spark generator carryin...

Страница 41: ...ials may cause tem porary irritation to eyes skin and respiratory tract Known hazards Some people can suffer reddening and itching of the skin Fibre entry into the eye will cause foreign body irritati...

Страница 42: ...ermostat and no overheat intervention should occur Warning isolate the boiler from the mains electricity supply before removing any covering or component n Electrical function 1 Remove all the case pa...

Страница 43: ...rom the mains electricity supply before removing any covering or component 1 Remove all the case panels and the sealed chamber lid 2 Disconnect the wires B from the Flue temperature probe NTC 3 Unscre...

Страница 44: ...isn t correctly evacuated the condensate level in the trap rises till it reaches thus causing the boiler lock out 21 2 Removal Warning isolate the boiler from the mains electricity supply before remo...

Страница 45: ...that is the setting for the operation with no external temperature probe fitted 20 30 40 50 60 70 80 20 15 10 5 0 5 10 15 20 25 K 4 K 3 K 2 K 1 K 0 5 K 1 5 K 6 External temperature C C h flow tempera...

Страница 46: ...Partners Electronic regulation p c b mod M110 32SM 1 BI1805 101 8 E01 204 D h w heat exchanger M110 24SM 1 BI1001 101 E01 205 D h w heat exchanger M110 32SM 1 BI1161 100 9 H20 993 Pump 1 BI1262 103 10...

Страница 47: ...Short spare parts list 45 P5 1 5 3 4 2 6 9 12 7 14 16 18 19 20 21 8 10 11 13 15 17...

Страница 48: ...17962 1252 2 1207 48A4 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 www...

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