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Wall hung, fan flue, room sealed, high efficiency gas boiler
Service manual
RIVA ADVANCE HE
Models: G.C. Appl. No.
M110B.24SM/C 47---583---11
M110B.32SM/C 47---583---12
M110B.24SR/C 41---580---07
Leave this manual adjacent to the gas meter
Table of contents
1
1.1
1.2
2
2.1
2.2
2.3
2.4
2.5
2.6
3
3.1
3.2
3.3
4
Overall information . . . . . . . . . . . . . . . . . .
Overall View . . . . . . . . . . . . . . . . . . . . . . . . .
Hydraulic diagram . . . . . . . . . . . . . . . . . . . .
General access and emptying hydraulic circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Nomenclature
Body panels
. . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
Control panel . . . . . . . . . . . . . . . . . . . . . . . .
Access to the sealed chamber
Emptying the primary circuit
Emptying the d.h.w. circuit
. . . . . . . . .
. . . . . . . . . . .
. . . . . . . . . . . .
Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring diagram
M110B.24SM/... M110B.32SM/...
Wiring diagram M110B.24SR/...
Circuit voltages
. . . . . . .
. . . . . . . .
. . . . . . . . . . . . . . . . . . . . . .
Fault finding . . . . . . . . . . . . . . . . . . . . . . . .
6
6.1
6.2
7
7.1
7.2
7.3
5
5.1
5.2
5.3
Condensing heat exchanger
Function
Removal
Cleaning
. . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
D.h.w. heat exchanger
Function
Removal
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Function
Checks
Removal
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
8
8.1
8.2
8.3
8.4
Three way diverter valve . . . . . . . . . . . . .
Function
Checks
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal of the electric actuator . . . . . . . .
Removal of the diverter group and its internal parts . . . . . . . . . . . . . . . . . . . . . . . . .
16
9 Electronic control/ignition p.c.b.
. . . . . .
. . . . . .
17
9.1
9.2
9.3
9.4
9.5
9.6
9.7
9.8
9.9
Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selection and adjustment devices
Checking the temperature
Operation lights
. . . . . .
. . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . .
17
17
18
19
Setting the boiler control function modes 19
Adjustment of maximum useful output in c.h. mode
Checks
. . . . . . . . . . . . . . . . . . . . . . . . .
Reignition frequency setting . . . . . . . . . . .
Combi / C.H. only mode setting . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. .
20
20
21
22
9.10
Removal of the electronic control p.c.b
22
9.11
Thermal control in the ” ” mode 24
9.12
Thermal control in the ” ” mode . . . . . .
25
15
15
15
15
12
12
12
13
13
13
13
10
10
10
11
10
11
Transformer
10.1
Removal
Gas valve
11.1
Function
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
10.2
Check the transformer . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11.2
Description of the parts . . . . . . . . . . . . . . .
26
26
26
27
27
27
5
6
7
8
1
1
1
2
2
3
2
2
3
4
5
11.3
11.4
Checks
11.5
Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal of the gas valve . . . . . . . . . . . . . .
12 Primary circuit flow switch
12.1
Function
12.2
Checks
12.3
Removal
. . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
13 Expansion vessel and temperature--pressure gauge . . . . . . . .
13.1
Function
13.2
Checks
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13.3
Removal of the expansion vessel . . . . . . .
13.4
Removal of the temperature---pressure gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14
14.1
14.2
14.3
14.4
D.h.w. flow switch, filter and flow limiter 32
Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description and location of parts
Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal of the sensor . . . . . . . . . . . . . . . .
14.5
Removal of the flow switch group
. . . . . . .
and d.h.w. circuit filter
14.6
Flow limiter
. . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . .
32
32
32
32
32
32
15 Temperature probe . . . . . . . . . . . . . . . . . .
34
15.1
Function
15.2
Checks
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
34
34
15.3
Removal of the c.h.Temperature probe . .
34
15.4
Removal of the d.h.w.Temperature probe 35
16 By--pass valve
16.1
Function
16.2
Removal
17 Fan and Air box
. . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . .
17.1
Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17.2
Removal of the Air box and the Fan . . . . .
18 Ignition and detection electrodes, burner and spark generator . . . . . . . . . .
18.1
Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18.2
Removal of the Ignition
18.3
18.4
Removal of the front insulation panel
18.5
Removal of the rear insulation
18.6
18.7
and detection electrodes
Removal of the burner
. . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .
Removal of the spark generator
Checks
. . . .
. . . . . . . . . .
. . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19 Safety thermostat
19.1
Function
19.2
Checks
19.3
Removal
. . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
20 Flue temperature probe NTC and Safety thermal fuse . . . . . . . . . . . . . .
20.1
Function
20.2
Removal
20.3
Checks
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21 Condensate trap . . . . . . . . . . . . . . . . . . . .
21.1
Function
21.2
Check the cleanness of the trap
21.3
Removal
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
22 Short spare parts list . . . . . . . . . . . . . . . .
31
37
37
37
36
36
36
38
38
42
42
42
42
38
38
39
39
40
40
45
45
45
45
43
43
43
43
46
31
31
31
31
27
28
28
30
30
30
30
1
Overall information
1.1
Overall View
Flue temperature probe NTC
Condensing heat exchanger air purger valve
Burner
Detection electrode
Air box
Safety thermostat
Fan
Air hose
Diverter valve
Codensate trap
C.h. temp.
probe
Main circuit flow switch
D.h.w. temp.
probe
1.2
Hydraulic diagram
Central heating (c.h.) operation
Safety thermal fuse
Condensing heat exchanger
Ignition electrodes
Spark
Generator
Transformer
Gas restrictor
C.h. pressure relief valve
Automatic air purger valve
D.h.w. Flow
Switch
Pump
Gas valve
Control panel
D.h.w.
heat exchanger
Expansion vessel
Condensate trap
Domestic hot water (d.h.w.) operation
C.h.
water return
C.h.
water flow
D.h.w.
inlet
D.h.w.
outlet
1
2
General access and emptying hydraulic circuits
2.1
Nomenclature
1
A
2
6
3
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.
5
4
Fig. 2.1
4
5
6
1
2
3
Right side panel
Front panel
Control panel lid
Control panel cover
Service panel
Left side panel
2.2
Body panels
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
For the most part of the check and maintenance operations it is necessary to remove one or more panels of the case.
The side panels can be removed only after the removal of the front panel.
To remove the front panel remove screws A (Fig. 2.2), lift the panel and remove it.
B
D
C
Fig. 2.3 --- bottom view of the boiler
B
2.3
Control panel
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
2
3
To gain access to the parts located inside the control panel proceed as follows:
1 Remove the front panel of the case.
Loosen the screws B and C (Fig. 2.3).
Remove the screws D.
4 Move the lower part of the side panels as indicated in Fig. 2.4 and pull the control panel.
When completely pulled out, the panel can rotate
45˚ downwards to facilitate the service operations on the internal parts.
2
Fig. 2.4
5 Remove the screws E and remove the service panel (Fig. 2.5).
F
F
E
General access and emptying hydraulic circuits
To gain access to the parts contained in the sealed chamber it is necessary to remove the lid of the sealed chamber.
For this purpose, remove the front and side panels of the case, remove the screws G as indicated in Fig. 2.6
and remove the lid.
1
2.5
Emptying the primary circuit
Close the c.h. circuit flow and return cocks H.
(Fig. 2.7).
Fig. 2.5
6 Remove the screws F and remove the control panel lid (Fig. 2.5).
2.4
Access to the sealed chamber
H
K
Fig. 2.7 --- bottom view of the boiler
2
3
4
Remove the front and right panels of the boiler.
Open the drain tap I (Fig. 2.9 combi or Fig. 2.10
only c.h.) until the boiler is completely emptied.
To help the draining of the primary circuit loose the condensing heat exchanger air purger valve
J (Fig. 2.8).
J
G
G
Fig. 2.6
Fig. 2.8
Attention: some water could remain in the condensing heat exchanger.
5 Close drain tap once the emptying has been completed.
3
General access and emptying hydraulic circuits
Fig. 2.9
I
I
Fig. 2.10
6
7
2.6
Emptying the d.h.w. circuit
Close the d.c.w. inlet cock K (Fig. 2.7).
Open one or more hot water taps until the boiler has been completely emptied.
4
3
Diagrams
3.1
Wiring diagram
M110B.24SM/... M110B.32SM/...
Electric supply terminal block
Three way diverter valve
L N bn gnye bu
External controls terminal block
3 2 1 bu bk bn
Pump gnye bu bn
1 M
~ 3 rd bk wh
2
4
Gas valve
1 bu bn bu gnye
5 gnye bk rd
D.h.w. temperature probe NTC
C.h. temperature probe NTC bu t bu bu
D.h.w. flow switch t wh bn bn bu bk bu bu bn rd wh bk bu bn bk rd wh bu
X12 X14
F2 F1
X11
X7 X17
K2
X3 wh bk
X16 wh wh bn
F3
T3
X15
X6
X23 bu bn bu bn
X24 bu bn wh
LD3 LD2 LD1
P6 P3
SB1
LD4 bn bn bu bu
Transformer
230V~ / 24V~ bn = brown bu = blue bk = black wh = white rd = red gy = grey gn = green ye = yellow vt = violet og = orange gnye = green/yellow rdwh = red/white
Ignition electrodes og bn bu wh bk wh bu gy rd NO
M
~ rd
COM bk rd
Primary circuit flow switch gy wh Fan gy t
Flame detection electrode gy Flue temperature probe NTC gy t wh
Safety thermal fuse
Safety thermostat
X10 rd bk wh gn
X2
Time switch
5
6
Diagrams
3.2
Wiring diagram
M110B.24SR/...
Electric supply terminal block
L N bn gnye bu
External controls terminal block
3 2 1
Pump bu bk bn gnye bu bn bu bn bu gnye
4
Gas valve
1
5 gnye
C.h. temperature probe NTC bu t bu bn bn bu bk bu bu bn bu bn
X12 X14
F2 F1
X11
X7 X17
K2
X3 wh bk
X16 wh wh bn
F3
T3
X15
X6
X23 bu bn bu bn
X24 bu bn wh
LD3 LD2 LD1
P6
P3
SB1
LD4 bn bn bu bu
Transformer
230V~ / 24V~ bn = brown bu = blue bk = black wh = white rd = red gy = grey gn = green ye = yellow vt = violet og = orange gnye = green/yellow rdwh = red/white
Ignition electrodes og bn bu wh bk wh bu gy rd NO
M
~ rd
COM bk rd
Primary circuit flow switch gy wh Fan gy t
Flame detection electrode gy Flue temperature probe NTC gy t wh
Safety thermal fuse
Safety thermostat
X10
X2
3.3
Circuit voltages
Electrical voltages with burner on
Pump
3 way diverter valve
Gas valve during c.h. or d.h.w. operation only during c.h. operation only during d.h.w. operation
D.h.w.
Flow switch
Supply network
Diagrams
X12
F2 F1
X7
X16
X3
T3
F3
X15
X6
X24
LD3 LD2 LD1
P6
K2
X17
X23
X14
P3
SB1
LD4
X11 X10
X2
Transformer Fan Main circuit pressure switch
Safety thermostat
7
--- (7)
--- (4)
--- (3)
--- (2)
--- (1)
NTC trap and anger b.) ge gau e alv tyv l vesse ion robe ep atur per trictor t ermosta ode lectr ctione trode elec obe or erat gen p.c.
e itch sw h p.pr
r cto restri ve val ass rob p.p
em em uitt irc low r itf ilte circu ve ttings nic
.b.
itc sw e p.c
tro alv lec (E low w.f
es terv tronic rse val w.f
nc w.t
- -p air ition tyth tem res ans ssure
D.h.
Fus
Elec
Main
Ign
Dete
Safe
Pre
Diver
Boile
Gas
D.h.
Mai
D.h.
By-
Safe
Gas
Flue
Exp
Spark
Fan
Pump xch ate w.he
D.h.
uit irc w.c
D.h.
uit circ C.h.
ipe np drai te nsa Conde s pipe Flue ne yli suppl Gas e lin upply ers Pow er rm sfo Tran
8 d pre lam nal sig out k--Loc ON OFF
--- (7)
--- (4)
--- (3)
--- (2)
--- (1)
NTC trap and anger b.) ge gau e alv l vesse ion robe ep atur per tem trictor t ermosta ode lectr ctione trode elec or erat gen obe p.c.
e itch sw h p.pr
r cto restri ve val ass rob p.p
em em uitt irc low itf r ilte circu b.
nic itc sw e p.c.
tro ve ttings alv lec (E low nic w.f
es ctro rse terv val w.f
nc w.t
- -p air ition tyth res ans tyv ssure Pre
Safe
Dete
Ign
Main
Ele
Fus
D.h.
Exp
Flue
Gas
Safe
By-
D.h.
Mai
D.h.
Gas
Boile
Diver
Fan
Spark
Pump xch ate w.he
D.h.
uit irc w.c
D.h.
uit circ C.h.
ipe np drai te nsa Conde es pip Flue e lin upply ne yli ers suppl Gas
Pow er rm sfo Tran d pre lam nal sig out k--Loc OFF F
9
5
Condensing heat exchanger
5.1
Function
The Condensing heat exchanger A in Fig. 5.1 has the function of transferring heat produced from combustion of the gas and from the flue exhausted gas to the water circulating in it.
A
H
J
C I I
E
G
F
B
1
2
5
6
7
8
9
Fig. 5.1
By reducing the combustion products temperature, the latent heat of the vapour is transferred to the water circuit, allowing an extra gain of useful heat.
The condensed vapour is then drained through the condensate trap B and the draining pipe C.
5.2
Removal
3
4
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
Disconnect the flue system from the boiler.
Remove the fan group (rubber pipe, gas pipe) following the instructions from 1 to 6 in section 17.2.
Disconnect the detection electrode connector D, the ignition electrodes connector E and the earth wire F.
Disconnect the fan connector G by pressing the plastic hook placed on the side of the connector
(Fig. 5.2).
Unscrew the nuts H (Fig. 5.2).
Remove the fan---burner group I.
Empty the primary circuit of the boiler.
Remove the clips J (Fig. 5.2).
Loosen the connection K and slightly move the pipe L upwards, turn it towards left (Fig. 5.2) and then move the pipe downwards freeing it from the
Condensing heat exchanger.
D
M N L K
Fig. 5.2
10 Loosen the connection M and slightly move the pipe N upwards, turn it towards left (Fig. 5.2) and then move the pipe downwards freeing it from the
Condensing heat exchanger.
P
R
O
Q
Fig. 5.3
10
11 Using pliers, remove the spring O moving it downwards and disconnect the rubber pipe P
(Fig. 5.3).
12 Unscrew the screws Q and remove the clamps
(Fig. 5.3).
13 Disconnect the two connectors R by pressing the plastic hook placed on the side of the connector
(Fig. 5.3).
14 Remove the Condensing heat exchanger by levering it and sliding it forwards.
15 Reassemble the Condensing heat exchanger carrying out the removal operations in reverse order.
Ensure to tight the nuts H --- Fig. 5.2 firmly
5.3
Cleaning
If there are deposits of dirt on the coil of the Condensing heat exchanger, clean with a bristle paintbrush and remove the dust with a hoover.
Warning: After cleaning or replacement as detailed above, if it deemed necessary to undertake a combustion analysis, refer to
Condensing heat exchanger the appropriate chapter Maintenance of the installation instructions manual.
S
Fig. 5.4
The siliconic gasket S Fig. 5.4 must be replaced every 2 years.
11
6
D.h.w. heat exchanger
6.1
Function
The d.h.w heat exchanger A in Fig. 6.1 and Fig. 6.3 allows the instantaneous transfer of heat from the primary hydraulic circuit to the water destined for d.h.w use.
A
A
B
Fig. 6.3
5 Remove the pump following the instructions in section 7.3.
A
C
Fig. 6.1
The schematic structure is shown in Fig. 6.2.
Primary hydraulic circuit
Domestic hot water circuit
Fig. 6.2
1
2
3
4
6.2
Removal
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
Remove the front and right hand side panels of the case.
Empty the primary circuit and the d.h.w circuit of the boiler.
Completely unscrew the Allen key screws B
(Fig. 6.3) which hold the exchanger to the brass group.
Remove the electric actuator following the instructions in section 8.3.
Fig. 6.4
6
7
Completely unscrew the Allen key screws C
(Fig. 6.4) which hold the exchanger to the plastic groups.
Move the exchanger towards the rear of the boiler and extract it.
Reassemble the d.h.w. heat exchanger carrying out the removal operations in the reverse order.
Warning: to lubricate the O--ring gaskets exclusively use a silicone base grease compatible to be in contact with foods and approved by the local water Authorities.
Attention. When reassembling the exchanger be sure to put the off centre location/securing pin indicated in Fig. 6.5 towards the left side of the boiler.
Fig. 6.5
12
7
Pump
7.1
Function
The pump A in Fig. 7.1 and Fig. 7.2 has the function of making the water in the main circuit circulate through the main condensing heat exchanger and therefore through the c.h. system (during the c.h. function) or through the secondary heat exchanger (during the d.h.w. function).
A n
Check that the impeller is integral with the rotor.
With the boiler off remove the front and right hand side case panels, lower the control panel and empty the primary circuit.
Remove the pump head by undoing the screws which hold it to the pump body and check that the impeller is firmly joined to the rotor.
1
4
5
2
3
6
7
7.3
Removal
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
Remove the front and right hand side case panels.
Empty the primary circuit of the boiler.
Extract and lower the control panel.
Disconnect the connector B (Fig. 7.2)(Fig. 7.3).
Loosen the connection C,and pull up and turn to the left the pipe D.
C.h. only model remove the fork E and remove pressure gauge connection F (Fig. 7.3)
C.h. only model remove the fork G, loosen the connection H and remove the pipe I (Fig. 7.3)
D
C
Fig. 7.1
7.2
Checks
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
n Check that the pump is not seized and that the movement of the rotor is not subject to mechanical impediments.
With the boiler off, remove the front panel. Remove the air release plug of the pump and turn the rotor with a screwdriver.
n
Check the electrical continuity.
With the boiler off, remove the front panel and disconnect the connector B (Fig. 7.2).
Measure the electrical resistance between the pump supply connections.
Electrical resistance of the windings (at ambient temperature) must be about 230 8.
n
Check the absence of starting defects.
With the boiler off remove the front case panel.
Remove the air release plug from the pump. Start the boiler and with a screwdriver, turn the rotor in the direction of the arrow. If there is a defect in starting, the rotor will begin to turn normally only starting it manually.
B
Fig. 7.2
D
C
E
B
A
A
Fig. 7.3 c.h. only model
8 Remove the locking plate J.
J
K
J
K
F
G
H
I
13
Pump
9 Unscrew the two screws K that hold the pump on the frame and remove the pump.
Reassemble the pump carrying out the removal operations in the reverse order. When reassembling the pump, check the correct location of the O---ring gasket in the inlet port of the pump that seals the connection between the pump and the plastic group.
14
8
Three way diverter valve
8.1
Function
The diverter valve A (Fig. 8.1) has the function of modifying the hydraulic circuit of the boiler by means of an electric command given by the electronic control p.c.b.
in order to send the water that exits the primary heat exchanger towards the c.h. system or towards the d.h.w.
heat exchanger.
B
A rd = red bk = black wh = white
Fig. 8.2 --- D.h.w. mode
B
Spindle B not visible
9,4 Kohm
Open circuit
Spindle B visible
Open circuit
9,4 Kohm rd = red bk = black wh = white
Fig. 8.1
8.2
Checks
n
Check the electrical continuity
Fig. 8.2 indicates the relationship between the electric command coming from the electronic control p.c.b.
and the position of the actuator B (brass spindle) when the boiler operates in d.h.w. mode.
Fig. 8.3 indicates the relationship between the electric command coming from the electronic control p.c.b.
and the position of the actuator 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 the wiring) is also given.
Fig. 8.3 --- C.h. mode
1
2
3
8.3
Removal of the electric actuator
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
Remove the front case panel.
Disconnect the connectors C (Fig. 8.4).
Remove the fixing spring D and remove the actuator E.
Reassemble the actuator carrying out the removal operations in the reverse order.
When reassembling the actuator, refer to Fig. 8.2
--- Fig. 8.3 or to the wiring diagram in section 8.2
for the correct wiring connection.
15
Three way diverter valve
E
C
D
L
Fig. 8.4
3
4
1
2
5
6
8.4
Removal of the diverter group and its internal parts
Remove the front and both side case panels.
Empty the primary circuit and the d.h.w. circuit of the boiler.
Remove the electric actuator (see section 8.3).
Remove the fixing spring F (Fig. 8.5) and remove the primary circuit flow switch G.
Disconnect both c.h. and d.h.w. temperature probe, respectively H and I .
Unscrew the connector J, the c.h. flow connector and the d.h.w. outlet connector.
L
M
Fig. 8.6 Rear view of the boiler
10 Refer to the exploded view in Fig. 8.7 to remove the internal parts of the three way diverter valve.
J
F
G
I
H
Fig. 8.5
7
8
9
Remove the d.h.w. heat exchanger (see section
6.2).
Remove the fork K and move away the pipe L
(Fig. 8.6).
Unscrew the screw M and remove the diverter group.
Fig. 8.7
11 Reassemble the diverter group carrying out the removal operations in the reverse order.
Warning: to lubricate the O--ring gaskets exclusively use a silicone base grease compatible to be in contact with foods and approved by the local water Authorities.
16
9
Electronic control/ignition p.c.b.
9.1
Function
Inlet Information
On the Electronic control/ignition p.c.b.......
Function control
C.h. temperature adjustment
D.h.w. temperature adjustment
Boiler reset button
(control panel fascia)
From other boiler devices....
C.h. temperature probe NTC
D.h.w. temperature probe NTC
D.h.w. flow switch
Primary circuit flow switch
Flue temperature probe NTC
Safety thermal fuse
Safety thermostat
Flame detection electrode
Room thermostat (if fitted)
Time switch
Fig. 9.1
Outlet command
Pump
Three way diverter valve
Gas valve
Fan
Ignition electrodes
Appliance operation lights*
Lock---out signal lamp*
*control panel fascia
The fundamental function of the Electronic control/ignition p.c.b. is that of controlling the boiler in relation to the external needs (i.e. heating the dwelling or heating the water for d.h.w. use) and operating in order to keep the temperature of the hydraulic circuits constant.
This is obviously possible within the useful power and maximum working temperature limits foreseen.
Generally, the Electronic control/ignition p.c.b. receives inlet information coming from the boiler (the sensors) or from the outside (knobs, room thermostat, etc.), processes it and consequently acts with outlet commands on other components of the boiler (Fig. 9.1).
The Electronic control/ignition p.c.b. is also a full sequence ignition device and does a sequence of operations (ignition cycle) which lead to the ignition of the gas at the burner
It checks the presence of the flame during the entire period in which it is activated and supplies the fan regulating its speed.
The Electronic control/ignition p.c.b. has a safety func-
tion and any incorrect interventions or tampering can result in conditions of dangerous functioning of the boiler.
The Electronic control/ignition p.c.b. can lock the functioning of the boiler (lock state) and stop its functioning up to the resetting intervention. The lock is signalled by the lighting of the lock---out signal lamp and the device can be reset only by using the boiler reset button placed on the control panel fascia.
Some components which are connected to the device can activate the lock state. The causes of a lock state could be: f
The intervention of the safety thermostat (overheat of the primary circuit).
f
The intervention of the flue temperature probe
(overheat of the combustion products).
f
A fault on gas supply.
f
Faulty ignition (faulty ignition electrodes, their wiring or connection).
f
Faulty flame detection (faulty detection electrode, its wiring or connection).
f
Faulty condensate drainage.
f
Faulty gas valve (faulty on---off operators or not electrically supplied).
f
Faulty Electronic control/ignition p.c.b..
Other components like the primary circuit flow switch can temporarily stop the ignition of the burner but allow its ignition when the cause of the intervention has stopped.
Fig. 9.20 and Fig. 9.21 show the sequence of the operations that are carried out at the start of every ignition cycle and during normal functioning.
9.2
Selection and adjustment devices
On the Electronic control/ignition p.c.b. several selection, adjustment and protection devices are located.
(Fig. 9.2).
Some of these devices are directly accessible by the user (function control, temperature adjustment poten-
17
Electronic control/ignition p.c.b.
tiometers etc.) others, like the fuses, are accessible by removing the service panel.
1 2 3 4 5 6 7 8 9 10
The temperature of the water is converted into an electric signal by means of temperature probes.
The user, setting the desired temperature with the control panel knobs operates the variable elements (14 and
17 in Fig. 9.2) of the electronic control p.c.b.
If the power requested is lower than 40% of the maximum power output then control is achieved by switching ON the burner at minimum power, then switching
OFF (ON/OFF function). If the power requested is higher, then the burner is switched ON at maximum power and will control by modulating to 40% of the maximum power output.
During the c.h. operation (Fig. 9.3), the signal coming from the c.h. temperature probe is compared to the signal given by the control panel through the adjustment made by the user (knob ). The result of such a comparison operates the fan speed thus regulating the gas flow rate and consequently changing the useful output of the boiler.
19 18 17 16 15 14 13 12 11
Fig. 9.2
4
5
2
3
6
1
7
8
9 x7 connector --- electric supply terminal block and external controls terminal block.
Fuse F1, F2 3,15 A F
Fuse F3, 400 mA T x12 connector --- pump and 3way diverter valve x17 connector --- gas valve x14 connector --- external temperature probe
(optional) x9 connector --- safety thermostat, flue temperature probe NTC, c.h. temperature probe NTC x11 connector --- d.h.w. temperature probe x10 connector --- d.h.w. flow switch
10 x13 connector --- remote control (optional)
11 x2 connector --- timer
12 Lock---out signal lamp
13 Boiler reset button
14 Function control / C.h. temperature adjustment
15 x22 connector --- fan
16 x24 connector --- transformer
17 D.h.w. temperature adjustment
18 x5 connector --- transformer
19 Appliance operation lights
9.3
Checking the temperature
The Electronic control/ignition p.c.b. makes it possible to separately adjust the c.h. water flow temperature and d.h.w. outlet temperature.
Fig. 9.3
When the boiler functions in d.h.w. (Fig. 9.4), the signal coming from the d.h.w. temperature probe is compared with the signal given by the control panel through the adjustment made by the user (knob ).
18
Electronic control/ignition p.c.b.
With the boiler switched ON ( or ) all the lamps
(19 in Fig. 9.2) are activated.
The following table gives the relationship between each of the possible lamp combinations and their meaning.
90 ˚C
Fig. 9.4
Normally, the result of the comparison between these two signals directly operates the fan speed adjusting the useful output generated in order to stabilize the temperature of the exiting water.
If during the d.h.w. mode operation, the temperature of the primary circuit goes over 90qC, the useful output is automatically reduced so that the primary circuit cannot reach excessive temperatures.
The control sequences in function and in function are illustrated in detail in sections 9.11 and 9.12.
9.4
Operation lights
The Electronic control/ignition p.c.b. is provided with three lamps (L.E.D. indicators) 19 in Fig. 9.2 that give optical information during the operation of the boiler.
The green lamp on the left gives information whether the boiler is in stand---by mode or during the normal operation of the boiler.
The following table gives the relationship between the lamps indication and their meaning.
A short pulse every 4 seconds
Boiler in stand---by condition.
(function control in position).
Anti---freeze system active.
Boiler ON condition
(function control in position) or
1 second ON 1 second OFF
Normally operating boiler
(see the previous table for details)
C.h. operation
D.h.w. operation
Frost protect operation
D.h.w. operation
Excessive temperature on primary circuit
Faulty c.h. temperature probe NTC
Faulty d.h.w temperature probe NTC
Faulty primary circuit
(no water or absence of flow)
Lack of burner ignition
Safety thermostat lock out
Faulty fan control system
Flue temperature probe NTC lock out
Open flue temperature probe NTC
Faulty external temperature probe NTC
Flame detection error
Lack of power supply or faulty electronic control p.c.b.
Faulty Electronic control/ignition p.c.b.. *
Lamp
OFF
Lamp
ON
Flashing lamp, alone or simultaneously with an other lamp.
Flashing lamp, alternate with another lamp.
* These conditions are normal only for a short time when the power supply is applied to the boiler.
If permanent they indicate a faulty p.c.b.
9.5
Setting the boiler control function modes
It is possible to select the various boiler control function modes by using the function selector knob A and the
D.h.w. temperature control knob B (Fig. 9.5).
On model M110B.24SR/... the knob B is used just for boiler setting and doesn’t affect the boiler functions during the normal operation.
During the function modes setting, the boiler does not operate.
19
Electronic control/ignition p.c.b.
Fig. 9.5
E B A C D
9.6
Adjustment of maximum useful output in c.h. mode
The following procedure allows the output of the boiler for c.h. to be limited to meet the system requirement.
Adjusting the maximum useful output in c.h. mode does not prevent the boiler firing at maximum rate for d.h.w. production.
1 Turn the boiler ON positioning the function selector knob A as indicated in Fig. 9.6.
Fig. 9.6
E
2
3
B A C D
Keep pressed the reset button C for about 10 seconds until the lock---out signal lamp D blinks.
The lamps E should give the indication as in
Fig. 9.7 (maximum c.h. useful output adjustment). If not, press the reset button repeatedly to obtain it.
Knob position
6
7
4
5
1
2
3
Tab. 9.1
Maximum useful output in c.h. mode non condensing kW (BTU/h)
M110B.24SM/...
M110B.24SR/...
M110B.32SM/...
5,8 (19 789)
9,0 (30 707)
12,2 (41 625)
15,5 (52 884)
18,7 (63 802)
21,9 (74 720)
25,1 (85 638)
8,2 (27 977)
12,4 (42 307)
16,5 (56 296)
20,7 (70 626)
24,8 (84 614)
29,0 (98 944)
33,1 (112 933)
1
2
3
4
5
6
7
B
Fig. 9.8
5
6
To memorize the setting keep pressed the reset button C for about 5 seconds until the lights E briefly blinks simultaneously.
To reset the boiler to the normal operation turn it
OFF and ON by the function selector knob A. In any case, the boiler automatically resets to its normal operation after 10 minutes.
9.7
Reignition frequency setting
It is possible to select the minimum time that must pass between two ignitions of the burner in c.h. function mode.
1 Turn the boiler ON positioning the function selector knob A as indicated in Fig. 9.9.
Where: Lamp OFF
Lamp ON
Fig. 9.7
At this step it is possible to visualize the current setting by keeping the reset button C pressed for more than 5 seconds. The lamps will flash a number of times corresponding to the setting (Tab. 9.1 and Fig. 9.8).
4 To change the setting turn the knob B on a position corresponding to the desired maximum useful output (Tab. 9.1 and Fig. 9.8).
By turning the knob B, the lock---out signal lamp
D blinks quickly (2 per seconds) indicating that the setting has changed and must be memorised.
20
Fig. 9.9
E
2
3
B A C D
Keep pressed the reset button C for about 10 seconds until the lock---out signal lamp D blinks.
The lamps E should give the indication as in
Fig. 9.10 (reignition frequency). If not, press the reset button repeatedly to obtain it.
Where: Lamp OFF
Lamp ON
Fig. 9.10
At this step it is possible to visualize the current setting by keeping the reset button C pressed for more than 5
seconds. The lamps will flash a number of times corresponding to the setting (Fig. 9.11).
4 To change the setting turn the knob B on a position corresponding to the desired delay.
By turning the knob B, the lock---out signal lamp
D blinks quickly (2 per seconds) indicating that the setting has changed and must be memorised.
1 1/2
2
3
3
0 1
4
4
5 1/2
5
6
7
7
8 1/2
B
Delay (minutes)
Setting No.
Fig. 9.11
5
6
To memorize the setting keep pressed the reset button C for about 5 seconds until the lights E briefly blinks simultaneously.
To reset the boiler to the normal operation turn it
OFF and ON by the function selector knob A. In any case, the boiler automatically resets to its normal operation after 10 minutes.
Factory setting = 3 minutes
9.8
Combi / C.H. only mode setting
1
2
Two different options are available on the Electronic control/ignition p.c.b. and proper setting must be done after a replacement of the p.c.b.
Remove the front panel of the case.
Turn ON the power supply. Lamps E give the indication as in Fig. 9.12.
Where: Lamp OFF
Lamp Flashing
Fig. 9.12
3
4
5
Position the function selector A as in NO TAG and disconnect the C.h. temperature probe.
Keep pressed the reset button C for about 10 seconds (Fig. 9.13) until the lock---out signal lamp D blinks.
Connect the c.h.temperature probe.
6
Electronic control/ignition p.c.b.
Press the reset button C repeatedly (2 times) until the lamps E give the indication as in Fig. 9.14
(boiler mode).
Where: Lamp OFF
Lamp ON
Fig. 9.14
At this step it is possible to visualize the current setting by keeping the reset button C pressed for more than 5 seconds. The lamps E will flash a number of times corresponding to the setting (Fig. 9.15).
M110B.24SR/...
4 flashes
M110B.24SM/...
M110B.32SM/...
1 flash
B
Fig. 9.15
7
8
9
To change the setting turn the knob B on a position corresponding to the boiler models
(Fig. 9.15). By turning the knob B, the lock---out signal lamp D blinks quickly (2 per seconds) indicating that the setting has changed and must be memorised.
To memorize the setting keep pressed the reset button C for about 5 seconds until the lights E briefly blinks simultaneously.
Press the reset button C once until the lamps E give the indication as in Fig. 9.16 (boiler mode).
Where: Lamp OFF
Lamp ON
Fig. 9.16
It’s now possible to check the current setting by pressing reset button C for more than 5 seconds. The three lamps E will flash a number of times corresponding to the setting as in Fig. 9.17 (once for the combination and four times for system boilers). At this point only the right green light flashes.
M110B.24SR/...
4 flashes
M110B.24SM/...
M110B.32SM/...
1 flash
B
E
Fig. 9.13
B A C D
Fig. 9.17
21
Electronic control/ignition p.c.b.
10 Turn the water control to minimum. Lock---out lamp blinks (2 per second) indicating the setting has changed
11 To change the setting turn the knob B on a position corresponding to the boiler model
(Fig. 9.17).
12 To memorize the setting keep pressed the reset button C for about 5 seconds until the lights E briefly blinks simultaneously. At this point only the right green light flashes.
13 To reset the boiler to the normal operation turn it
OFF and ON by the function selector knob A.
9.9
Checks
n
Check that the fuses are complete
If the Electronic control/ignition p.c.b. does not supply any device (pump, fan, etc.) check that the fuses 2 and
3(Fig. 9.2) are complete.
If a fuse has blown replace it with one that has the same characteristics after having identified the reason for failure.
n Lock sequence
Start the boiler until the burner is ignited.
With the burner firing, interrupt the gas supply. The
Electronic control/ignition p.c.b. must carry out four complete ignition cycles and then, after about 4 minutes, goes to lock---out state.
By turning the boiler on and off by means of the function switch the device must not unlock and the burner must not turn on.
9.10
Removal of the electronic control p.c.b
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
When replacing the Electronic control/ignition p.c.b. it is advisable to go through the setting modes of the boiler here described in sections 9.5 to 9.7.
The spare electronic control/ignition p.c.b. is set for natural gas.
If the boiler is fed with different gas type, go through the Gas conversion operations described in the In- stallation manual.
If an external temperature probe (optional) is fitted, the coefficient K has also to be set as described in the Commissioning chapter of the installation manual.
1
2
3
Gain access to the parts located inside the control panel as explained in the section 2.3 of this manual.
Remove all the wiring connected to the Electronic control/ignition p.c.b..
To disconnect the connectors delicately flex the hook present on one side of each socket.
Remove the spindles of the c.h. and d.h.w. temperature adjustment knobs by delicately pulling them with pliers in the direction shown by the arrow in Fig. 9.18.
Fig. 9.18
4
5
6
Unscrew the four screws that hold the Electronic control/ignition p.c.b. on to the control panel.
Remove it by lifting its rear edge and freeing it from any of the wiring.
Re---assemble the Electronic control/ignition p.c.b. following the removal procedures in the reverse order.
Important
When re---assembling the Electronic control/ignition p.c.b.:
7
8
It is not necessary to utilise static protections but it is advisable to ensure that the pcb is handled with care and held at the edges and with clean dry hands.
Fit the p.c.b. into the control panel by first inserting the front lower edge under the control knob shafts. Lower the rear edge and ensure that no wiring is trapped beneath.
9 Insert the spindles in the control panel knobs until the notch A (Fig. 9.19) reaches the potentiometer edge. It is not necessary to force them in the knob.
10 While tightening the screws that fix the Electronic control/ignition p.c.b. on the control panel, keep the p.c.b. towards the control panel fascia mak-
22
ing sure of the contact between the boiler reset button B and the tab C (Fig. 9.19).
Fig. 9.19
A
A
B
C
Electronic control/ignition p.c.b.
Attention
After installing the Electronic control/ignition p.c.b. :
11 Make sure the c.h. ( ) and d.h.w. ( ) temperature adjustment knobs can move freely for the complete range.
If not, remove the spindle again as described at step 3, turn the knob half a turn and re---insert the spindle.
12 Make sure that the settings comply with the indications given in section 9.5.
13 Operate the boiler and close the gas inlet cock so that the boiler goes into the safety lock---out state.
Verify the correct operation of the boiler reset button by pressing and releasing it.
Warning: After cleaning or replacement as detailed above, if it deemed necessary to undertake a combustion analysis, refer to the appropriate chapter Maintenance of the installation instructions manual.
23
Electronic control/ignition p.c.b.
9.11
Thermal control in the ” ” mode
Switch in the function mode circulator on YES
Taking water from the domestic hot water circuit?
NO circulator off fan still
YES
YES
Is primary circuit temperature higher than that selected?
NO
YES
Operation lights
YES
Main circuit pressure switch consense?
NO stop circulator (3min)
Operation lights lock memorised?
NO cancels lock starts fan checks fan rpm
NO
Is fan rpm exact?
turns on lock---out light
Opeartion lights
YES
Is flue temperature higher than 110˚C?
YES beginning of wait period
NO
Fig. 9.20
24 flame presence?
YES
NO
YES starts ignition discharges
Opens gas valve beginning of ignition period
End of ignition period?
End of wait period?
NO flame presence?
YES
YES
NO closes gas valve stops fan interrupts ignition discharges memorizes lock turns on lock---out light
NO
Is fan rpm exact?
YES
NO reset push---button pressed?
YES interrupts ignition discharges gas valve open fan runs
NO safety thermostat or flue temperature probe lock out?
YES flame presence?
NO
YES
Electronic control/ignition p.c.b.
9.12
Thermal control in the ” ” mode
Switch in the function mode
See functioning with the function control in the mode
(sec. 9.11)
YES
Taking water from the domestic hot water circuit?
NO circulator on
Request for heat from room thermostat?
NO circulator off fan still
YES
YES
Is primary circuit temperature higher than that selected?
NO
YES
Opeartion lights
YES
Main circuit pressure switch consense?
NO stop circulator (3min)
Operation lights lock memorised?
NO cancels lock starts fan checks fan rpm
NO
Is fan rpm exact?
turns on lock---out light
Opeartion lights
YES
Is flue temperature higher than 110˚C?
YES beginning of wait period
NO flame presence?
YES
NO
YES starts ignition discharges
Opens gas valve beginning of ignition period
End of ignition period?
End of wait period?
NO flame presence?
YES
YES
NO closes gas valve stops fan interrupts ignition discharges memorizes lock turns on lock---out light
NO
Is fan rpm exact?
YES
NO reset push---button pressed?
YES interrupts ignition discharges gas valve open fan runs
NO safety thermostat or flue temperature probe lock out?
YES
YES flame presence?
NO
Fig. 9.21
25
10
Transformer
10.1
Removal
2
3
4
Disconnect the four connectors A.
Unscrew the screws B and remove the
Transformer C by sliding it forward.
Reassemble the Transformer carrying out the removal operations in the reverse order.
After reassembling ensure the wires are correctly connected (see Fig. 10.2) smaller connector larger connector clamp for fitting the transformer
C
B
A
Fig. 10.1
1
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
Remove all the case panels and the sealed chamber lid (see section 2).
smaller connector
Fig. 10.2
larger connector
1
2
10.2
Check the transformer
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
Remove the Transformer (see section 10.1)
Measure the electrical resistance of the primary and secondary windings.
The primary should have a resistance approx. 35 ohm and the secondary approx. 1,4 ohm.
26
11
Gas valve
11.1
Function
The Gas valve A in Fig. 11.1 controls the gas inflow to the boiler burner.
A
Fig. 11.1
By means of an electric command given to the on---off operators the passage of the gas through the Gas valve can be opened or closed.
1
2
3
4
5
11.2
Description of the parts (Fig. 11.2)
Maximum gas pressure adjustment
Minimum gas pressure adjustment
On---off operators
On---off operators electric connector
Gas valve inlet pressure test point
11.3
Adjustment
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
Check the supply pressure before making any adjustment to the gas valve.
1
2
3
Close the gas inlet valve.
Remove the front panel of the case and lower the control panel (see sections 2.2 and 2.3).
Loosen the internal screw on the Inlet Pressure
Test Point 5 (Fig. 11.2) of the Gas valve and connect a pressure gauge using a suitable hose.
4
5
6
7
8
Open the gas inlet valve.
Turn on the electricity supply to the boiler, switching on the fused spur isolation switch.
The appliance operation light on the left will flash every 4 seconds.
Set the function knobs as illustrated in Fig. 11.4.
Open at least one hot water tap fully.
Read the inlet pressure value and ensure that it is within the limits given in the table Gas supply
pressures, of the user/installation manual
If it does not comply with the required pressure check the gas supply line and governor for faults and/or correct adjustment.
9 Switch off the boiler close the gas inlet valve and close the water tap .
10 Disconnect the pressure gauge and close the
Inlet Pressure Test Point 5 (Fig. 11.2).
Gas valve adjustment
11 Fit the probe of the flue analyser in the flue exhaust sampling point located on the exhaust pipes of the boiler (Fig. 11.3).
air---flue exhaust sampling points
1
2
5
Fig. 11.2
4
3
Fig. 11.3
12 Turn on the boiler, switching on the fused spur isolation switch.
13 Open the gas inlet valve.
14 Set the function knob B as indicated in Fig. 11.4.
The appliance operation light on the left will flash every 4 seconds.
27
Gas valve
E F B C D
Fig. 11.4
15 Keep pressed the reset button C for about 10 seconds (Fig. 11.4) until the lock---out signal lamp D blinks.
16 The lamps E should give the indication as in
Fig. 11.5.
Where: Lamp OFF
Lamp ON
Fig. 11.5
17 Release and keep the reset button C pressed for more than 5 seconds until the lock---out signal lamp D is switched off.
The boiler will now go through an ignition sequence and the burner will light.
18 Open at least one hot water tap fully.
Adjusting minimum gas valve setting
19 Set the knob F to the minimum position as illustrated in Fig. 11.6.
E
Fig. 11.6
F B C D
20 Allow the analyser to give a stable reading.
21 Read the CO
2
% value.
It should be between 9,0 and 9,8 % (natural gas
G20) or between 10,0 and 11,0 % (LPG G31).
To adjust the CO
2
% value remove the brass plug by unscrewing it and rotate the Allen key screw ø
4 mm (2 --- Fig. 11.2) (by rotating it clockwise the
CO
2
% increases).
Checking the maximum gas valve setting
22 Set the knob F to the maximum position as illustrated in Fig. 11.7.
28
E
Fig. 11.7
F B C D
23 Allow the analyser to give a stable reading.
24 Read the CO
2
% value.
It should be between 9,0 and 9,8 % (natural gas
G20) or between 10,0 and 11,0 % (LPG G31).
To adjust the CO creases).
2
% value rotate screw (1 ---
Fig. 11.2) (by rotating it clockwise the CO
2
% de-
25 Switch off the boiler and turn off the hot water tap(s).
26 Close the air---flue sampling points.
27 After adjustment fit the protective brass plug (2,
Fig. 11.2).
Important: after the gas pressure checks and any adjustment operations, all of the test points must be sealed.
11.4
Checks
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
n
Check the on---off operators coils
1
2
3
Remove the front panel of the case.
Disconnect the electrical connector 4 (Fig. 11.2).
Measure the electrical resistance between the connector pins of the on---off operators as illustrated in Fig. 11.8.
ON---OFF Operator approx. 6 400 8*
ON---OFF Operator approx. 920 8*
* at ambient temperature.
Fig. 11.8
1
2
11.5
Removal of the gas valve
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
Remove the front panel of the case as explained in the section 2.3 of this manual and the sealed chamber lid.
Remove the screw G and disconnect the connector H (Fig. 11.9).
5
Gas valve
Unscrew the connector K (Fig. 11.9), remove the fixing fork L and remove the pipe M (Fig. 11.10).
K
J
I
G H
Fig. 11.9
3
4
Turn off the gas supply and disconnect the gas isolation cock connector from the inlet port of the gas valve.
Using pliers, remove the spring I and the rubber pipe J (Fig. 11.9).
Fig. 11.10
L
M
N
Fig. 11.11
6
7
Unscrew the screws N and remove the valve
(Fig. 11.11).
Reassemble the valve carrying out the removal operations in reverse order.
Before to fit a new valve it is advisable to pre--set it as hereafter explained.
8 Remove the brass plug and turn the plastic screw inside it 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 described in section 11.3.
After any service operation on the components of the gas circuit check all the connections for gas leaks.
Warning: After cleaning or replacement as detailed above, it is deemed necessary to undertake a combustion analysis as detailed in chapter 11.3 section 11.
29
12
Primary circuit flow switch
12.1
Function
The Primary circuit flow switch ( A in Fig. 12.1) function is to detect water flow rate through the primary hydraulic circuit of the boiler.
A
Boiler OFF
Fig. 12.2
B Boiler ON n
Electrical check
It is possible to verify the general operation of the switch by measuring the electric resistance between the contacts C. and N.O. of the switch.
1 Remove the switch as explained in section
NO TAG.
2
3
Measure the electrical resistance between the tabs marked C. and N.O. (Fig. 12.3).
The contact must be normally open.
Operate the switch by hand and verify that the contact is now closed.
N.O.
C
I
Fig. 12.1
This hydraulic/membrane operated electrical micro--switch device will control the functioning of the ignition control circuit, providing there is an adequate quantity and flow of water in the primary circuit. Any failure of the pump or obstructions in the primary circuit, whilst in either c.h. or d.h.w. modes, will not allow the device to operate.
This device is connected to the electronic control p.c.b.
and if, after the pump operates, it does not activate within 20 seconds the control board will indicate that a fault condition (see section 9.4 of this manual) has occurred.
12.2
Checks
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
n
Mechanical function
1 Remove the front panel of the case.
2
3
Start and stop the boiler either in d.h.w. or c.h.
mode.
Looking through the switch box verify the position of the lever B referring to Fig. 12.2.
30 do not use
Fig. 12.3
12.3
Removal
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
2
3 n
Removal of the switch
1 Remove the front panel of the case.
4
Remove the fork C (Fig. 12.4).
Open the box and disconnect the switch.
Re---assemble the parts in reverse order of removal. Refer to Fig. 12.3 for the correct wiring connectors on the switch n
1
2
Removal of the membrane
Remove the front and right hand side panels of the case, turn off the flow and return isolation valves and empty the primary circuit.
Remove the fork C that holds the micro---switch housing D (Fig. 12.4).
C
D
Fig. 12.4
3
H
Unscrew the four screws E (see Fig. 12.5) open the hydraulic operator and remove the membrane F.
F
G
E
Primary circuit flow switch sion vessel can be changed without removing the boiler.
1
2
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
Remove the front and left hand side panels of the case, turn off the flow and return isolation valves and empty the primary circuit.
Completely unscrew the connection K, the locknut L (Fig. 13.2) and remove the expansion vessel from the top of the boiler.
Fig. 12.5
4 Reassemble the parts in reverse order of removal.
When assembling the membrane, ensure that its concave side faces towards the actuator plate G and the reference indicated aligns with the seat H (see
Fig. 12.5).
13
Expansion vessel and temperature---pressure gauge
13.1
Function
The Expansion vessel ( I in Fig. 12.1) function is to allow for the volume expansion of the c.h. circuit water due to the temperature rise.
1
2
13.2
Checks
Turn off the flow and return isolation valves and empty the primary circuit of the boiler.
Remove the protective cap J (Fig. 13.1) from the valve on the top of the expansion vessel and connect a suitable air pressure gauge.
I
K
L
Fig. 13.2
3 Re---assemble the parts in reverse order of removal.
1
13.4
Removal of the temperature---pressure gauge
2
3
4
Remove the front and right hand side panels of the case, turn off the flow and return isolation valves and empty the primary circuit.
Remove the fork M and the probe holder spring
N (Fig. 13.3).
Squeeze the tabs O to release the temperature--pressure gauge P and remove it.
Re---assemble the parts in reverse order of removal.
M
N
Fig. 13.1
3 Check the pre---load pressure and refer to the section Expansion vessel in the User 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, the expan-
O
Fig. 13.3
P
31
14
D.h.w. flow switch, filter and flow limiter
14.1
Function
The d.h.w. flow switch A in Fig. 14.1 is a device that generates an electrical signal when hot water is drawn.
2
1
3
Fig. 14.1
When the flow rate through the d.h.w. circuit reaches about 2,5 litres/min’, the float 5 (Fig. 14.3) is dragged upwards and the magnetic in it, getting closer to the sensor 8 closes the electric contact.
D
C
B
A
Fig. 14.2
7
8
5
6
3
4
1
2
14.2
Description and location of parts
(Fig. 14.3)
Flow switch plug
O---ring
Flow limiter (M110B.32SM/... optional accessory)
Body
Float
Filter
Sensor holder spring
Sensor
32
4
5 7
8
6
Fig. 14.3
14.3
Checks
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
n
Sensor operation
1
2
Remove the front panel of the case.
Measure the electrical resistance at the leads of the sensor. Without water being drawn, the contact must be open. By opening a hot water tap the contact must be close (electrical resistance zero
8).
1
2
3
14.4
Removal of the
sensor
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
Remove the front panel of the case.
Disconnect the connectors B and remove the sensor holder spring C (Fig. 14.2).
Remove the sensor.
14.5
Removal of the flow switch group and d.h.w. circuit filter
2
3
1
4
5
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
Remove the front panel of the case and empty the d.h.w. circuit.
Remove the sensor (see section 14.4).
Remove the fork D and pull up the flow switch plug 1 with the help of a screwdriver.
To remove the filter from the flow switch group separate the filter 6 from the body 4 (Fig. 14.3) by levering it.
Reassemble the parts following the removing sequence in reverse order.
14.6
Flow limiter
The M110B.24SM/... model is factory fitted with a 10 litre/min. flow limiter.
If on the M110B.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:
Nominal flow rate (litres/min)
10
12
14
Colour
Blue
Red
Pink
To install the flow limiter:
1 Remove the flow switch group as explained in the section 14.5.
2
D.h.w. flow switch, filter and flow limiter
Separate the flow switch plug 1 from the body 4 levering with a screwdriver one of the two hooks.
1
4
Fig. 14.4
3
4
Insert the flow limiter 3 as shown in Fig. 14.3
Reassemble the group following the above sequence in reverse order.
33
15
Temperature probe
15.1
Function
The Temperature probe has the function of converting the temperature of the water in the hydraulic circuit where it is installed into an electrical signal (resistance).
The relation between temperature and electrical resistance is stated in Fig. 15.1.
8
8500
8000
7500
7000
6500
6000
5500
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
12500
12000
11500
11000
10500
10000
9500
9000
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 ˚C
Fig. 15.1
On the boiler there are two Temperature probes. One on the output of the primary condensing heat exchanger (c.h. Temperature probe) A in Fig. 15.2 and
Fig. 15.3; one on the output of the d.h.w. heat exchanger (d.h.w. Temperature probe) B in Fig. 15.2 and
Fig. 15.3.
15.2
Checks
n
Temperature---resistance relationship
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
Disconnect the cable from the Temperature probe.
Measure the temperature of the pipe near the Temperature probe and check the electrical resistance according to the graph in Fig. 15.1.
1
2
3
4
15.3
Removal of the c.h.Temperature probe
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
Remove all the case panels and the sealed chamber lid.
Empty the primary circuit of the boiler.
Remove the electric connector C and unscrew the c.h. Temperature probe A --- Fig. 15.3 or
Fig. 15.4
Reassemble the c.h.Temperature probe carrying out the removal operations in reverse order.
A
B
C
D
A
Fig. 15.3
A
C
B
Fig. 15.2
34 c.h.
return c.h.
flow d.h.w.
inlet d.h.w.
outlet
Fig. 15.4
1
2
15.4
Removal of the d.h.w.Temperature probe
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
Remove the front panel of the case.
Empty the d.h.w circuit of the boiler.
3
4
Temperature probe
Remove the electric connector D and unscrew the d.h.w. Temperature probe B --- Fig. 15.3
Reassemble the d.h.w. Temperature probe carrying out the removal operations in reverse order.
Warning: to lubricate the O--ring gaskets exclusively use a silicone base grease compatible to be in contact with foods and approved by the local water Authorities.
35
16
By---pass valve
16.1
Function
The By---pass valve A in Fig. 16.1 is located between the c.h. water flow and return and its function is that of guaranteeing a minimum flow across the primary heat exchanger if the circulation across the c.h. system is completely closed.
The By---pass valve is fitted on the rear side of the diverter group.
2
3
4
Empty the primary circuit of the boiler.
Remove the diverter group as described in the section 8.4 of this manual.
Unscrew the connector B and remove the by--pass valve C (Fig. 16.2) (Fig. 16.3).
B
C
Fig. 16.2
A
Fig. 16.1
1
16.2
Removal
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
Remove all the case panels.
C B
Fig. 16.3
5 Reassemble the by---pass valve as illustrated in
Fig. 16.2 --- Fig. 16.3 reversing the order of removal.
36
17
Fan and Air box
17.1
Function
The function of the Fan A (Fig. 17.1) is to force the mixture of air and gas into the burner.
The function of the Air box B is to mix the gas and the air in the right proportion.
The flow rate of the air---gas mixture and consequently the input power of the boiler is proportional to the speed of the fan that is controlled by the electronic control p.c.b.
A
B
3 Disconnect the air manifold C (Fig. 17.2) by pulling it.
I
D
F
H
J
Fan gasket
G
Fig. 17.3
4 Disconnect the rubber pipe D (Fig. 17.3).
E
Fig. 17.1
1
2
17.2
Removal of the Air box and the Fan
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
Turn off the gas supply.
Remove all the case panels and the sealed chamber lid (see section 2).
Fig. 17.2
K
M
C
L
Fig. 17.4
5
6
7
8
Unscrew the gas connector E (Fig. 17.4)
Remove the fixing fork F and remove the gas pipe
G (Fig. 17.3).
Loosen without removing the screw H.
Remove the screws I and the air box J. Leave the air box with the air manifold clamped to the water pipe.
9 Disconnect the fan connector K by pressing the plastic hook placed on the side of the connector
(Fig. 17.2).
10 Unscrew the screws L (Fig. 17.2).
11 Remove the fan M.
12 Assemble the Fan and the Air box carrying out the removal operations in reverse sequence.
Before reassembling ensure the fan gasket
(Fig. 17.3) is correctly mounted.
Warning: After cleaning or replacement as detailed above, if it deemed necessary to undertake a combustion analysis, refer to the appropriate chapter Maintenance of the installation instructions manual.
37
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 right side of the fan---burner group A, are the ignition electrodes B and are connected to the spark generator C.
On the left side is the detection electrode D and it detects the presence of the flame.
H
K
B
I
I
D
K
C
F
J
E
A
I
J
G
Fig. 18.2
18.2
Removal of the Ignition and detection electrodes
1
2
3
4
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
Remove all the case panels and the sealed chamber lid (see section 2) .
Disconnect the ignition electrodes connector F and the earth wire G from the spark generator C
(Fig. 18.1) and disconnect the detection electrode connector H.
Unscrew the screws I and remove the ignition electrodes B and the detection electrode D
(Fig. 18.1).
Assemble the Ignition and detection electrodes carrying out the removal operation in reverse order.
When reassembling the ignition electrodes be sure to connect correctly the wires to the spark generator (see Fig. 18.3) earth wire ignition electrodes wire
C
Fig. 18.1
The burner E is fitted on the rear of the fan---burner group A.
38
Fig. 18.3
1
2
18.3
Removal of the burner
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
Remove the air box and the fan (see section 17.2)
Remove the Ignition and detection electrodes
(see section 18.2).
3
4
5
Unscrew the screws J (Fig. 18.1 )and remove the cover of the combustion chamber.
Unscrew the screws K (Fig. 18.1 ) and remove the
Air---gas duct lid.
Remove the burner by sliding it forward.
burner gasket
Ignition and detection electrodes
Before reassembling ensure the burner gasket is correctly located.
Warning: After cleaning or replacement as detailed above, if it deemed necessary to undertake a combustion analysis, refer to the appropriate chapter Maintenance of the installation instructions manual.
18.4
Removal of the front insulation panel
2
3
4
See warning note at the end of this chapter before to remove this part.
1 Remove the Ignition and detection electrodes
(see section 18.2).
Remove the burner (see section 18.3).
Remove the
front insulation panel
(Fig. 18.6).
Assemble the new front insulation carrying out the removal operation in reverse order.
When fitting the new panel ensure that the electrodes holes coincide with the holes of the combustion chamber.
locating tab
Fig. 18.4
6 Assemble the burner carrying out the removal operation in reverse order. Ensure the burner is correctly located by lining up the locating tab
(Fig. 18.4).
Fig. 18.5
burner gasket
Air---gas duct gasket front insulation
Siliconic gasket
Fig. 18.6
The siliconic gasket (Fig. 18.6) must be replaced if damaged or anyway every 2 years.
The front insulation (Fig. 18.6) must be replaced if damaged or wet
18.5
Removal of the rear insulation
See warning note at the end of this chapter before to remove this part.
Attention: Cover the inner of the condensing heat exchanger to avoid that dirt and debris fall in the coil.
1
2
Do the operations of section 18.3 from step 1 to step 3.
Unscrew the screw L, remove the washer M and the rear insulation N (Fig. 18.7).
39
Ignition and detection electrodes
N
M
L
1
2
There is not a significant way to verify the integrity of the spark generator.
When the fan turns but the burner does not light a possible cause is a faulty spark generator and it is advisable to replace it to locate the fault.
n
Check the position of the electrode edges
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
Remove the ignition electrodes (see section 18.2)
Check for the correct distance between the metallic edges of the ignition electrode (see Fig. 18.9
--- Fig. 18.10).
3,5 mm
Fig. 18.7
The rear insulation (Fig. 18.7) must be replaced if damaged or wet
1
2
18.6
Removal of the spark generator
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
Remove all the case panels and the sealed chamber lid.
Disconnect the spark generator connector coming from the control p.c.b, the electrodes wire and the earth wire coming from the ignition electrodes (Fig. 18.8).
ignition electrodes wire earth wire
O
C
O spark generator connector
Fig. 18.8
3
4
Unscrew the screws O and remove the spark generator
.
Assemble the spark generator carrying out the removal operation in reverse order.
When reassembling the spark generator be sure to connect correctly the wires.
18.7
Checks
n
Check of the spark generator
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
40 earth electrode
Ignition electrode
Fig. 18.9
n
Check the connection wires.
7 mm
Ignition electrode
Fig. 18.10
1
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
Remove all the case panels and the sealed chamber lid.
2 Check for the integrity of the insulation of wires which connect the electrodes to the spark generator and to the control/ignition p.c.b.
Warning -- Insulation panels material handling care
Mineral fibres are used in this appliance for the insulation panels of the combustion chamber
Excessive exposure to these materials may cause temporary 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
Ignition and detection electrodes cause foreign body irritation, which can cause severe irritation to people wearing contact lenses. Irritation to respiratory tract.
Precautions --- Dust goggles will protect eyes. People with a history of skin complaints may be particularly susceptible to irritation. High dust levels are only likely to arise following harsh abrasion. In general, normal handling and use will not present high risk, follow good hygiene practices, wash hands before, touching eyes, consuming food, drinking or using the toilet.
First aid --- Medical attention must be sought following eye contact or prolonged reddening of the skin.
41
19
Safety thermostat
19.1
Function
The safety thermostat A in Fig. 19.1 is a device that senses the temperature of the primary circuit water which flows in the outlet pipe of the condensing heat exchanger.
If the temperature control system of the boiler fails and the temperature of the primary circuit reaches a dangerous temperature, the safety thermostat opens the electric circuit that supplies the on---off operators of the gas valve.
Consequently, the full sequence ignition device attempts to light the burner and, at the end, locks the boiler and lights the lock---out signal lamp.
A n
Electrical function
1 Remove all the case panels and the lid of the sealed chamber.
2 Disconnect the safety thermostat and check its electrical function. Normally (no intervention) the contact must be closed (electrical resistance zero
8).
1
2
3
19.3
Removal
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
Remove all the case panels and the lid of the sealed chamber.
Disconnect the wiring B (detail in Fig. 19.2).
Unscrew the screws C which hold the overheat thermostat on the pipe of the condensing heat exchanger and remove it.
C
B
Fig. 19.1
19.2
Checks
n
Overheat temperature value
1 Set the temperature control knobs to their max.
position and run the boiler in d.h.w. and c.h.
2 Allow the boiler to reach its maximum operating temperature (monitor the temperature gauge on the instrument panel). The boiler should maintain a temperature below that of the safety thermostat and no overheat intervention should occur.
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
Fig. 19.2
4
5
Reassemble the overheat thermostat carrying out the operations in reverse order.
Apply an adequate quantity of heat conducting compound between the pipe and the thermostat.
Warning: After cleaning or replacement as detailed above, if it deemed necessary to undertake a combustion analysis, refer to the appropriate chapter Maintenance of the installation instructions manual.
42
20
Flue temperature probe NTC and
Safety thermal fuse
20.1
Function
The Flue temperature probe NTC A in Fig. 20.1 and
Fig. 20.2 senses the temperature of the combustion products that flow through the condensing heat exchanger.
B
NTC and acts as a safety device in extreme case of incorrect operation of the Flue temperature control system.
Reaching the breakdown temperature it opens the circuit and locks out the boiler.
In case of intervention of this safety device the heat exchanger (part shown in Fig. 20.3) may be damaged and must be replaced.
A
Fig. 20.1
If the temperature of the combustion products circuit reaches the limit temperature, the Flue temperature probe NTC reduces the gas flow rate to the burner. The temperature of the combustion products should decrease to a safe value temperature.
In the case that the temperature of the combustion products reaches a potentially dangerous value, it stops the boiler operation (lock---out).
This allows the use of plastic materials for the flue outlet pipes and bends.
The use of kits different from the original isn’t however allowed, since the flue pipes are integral parts of the boiler.
C
A
B
Fig. 20.2
A Safety thermal fuse B in Fig. 20.1 --- Fig. 20.2 is also connected in series with the Flue temperature probe
Fig. 20.3
20.2
Removal
1
2
3
4
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
Remove all the case panels and the sealed chamber lid.
Disconnect the connector C from the Flue temperature probe NTC by pressing the plastic hook placed on the side of the connector.
Unscrew and remove the flue temperature probe
A (Fig. 20.2) from the condensing heat exchanger.
Assemble the Flue temperature probe NTC carrying out the removal operations in reverse sequence.
20.3
Checks
n
Overheat temperature value
1
2
Set the temperature control knobs to their max.
position and run the boiler in d.h.w. and c.h.
Allow the boiler to reach its maximum operating temperature (monitor the temperature gauge on the instrument panel). The boiler should maintain a temperature below that of the Flue temperature probe NTC and no overheat intervention should occur.
n
Temperature---resistance relationship
1 Remove the Flue temperature probe NTC (see section 20.2).
2 Measure the Flue temperature probe NTC electrical resistance at the ambient temperature and check it according to the graph in Fig. 20.4
43
Flue thermostat
8
12500
12000
11500
11000
10500
10000
9500
9000
8500
8000
7500
7000
6500
6000
5500
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
Fig. 20.4
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 ˚C
44
21
Condensate trap
21.1
Function
The condensate trap A in Fig. 21.1 and Fig. 21.2 allows the discharge of the condensate via the condensate drain pipe avoiding in the mean time the escape of combustion products.
A plastic ball closes the trap outlet in case that the trap is empty.
21.2
Check the cleanness of the trap
Unscrew the plug on the bottom of the trap and remove dirt eventually deposit.
4
5
1
2
3
6
21.3
Removal
Warning: isolate the boiler from the mains electricity supply before removing any covering or component.
Remove the front and left case panels.
Disconnect the trap from the draining pipe.
Using pliers, remove the spring B moving it upwards and remove the flexible pipe C.
Unscrew the screw D and remove the trap.
Unscrew the lock---nut E and separate the trap from its bracket.
Reassemble carrying out the removal operations in reverse order.
D C
B
E
A
A
Fig. 21.1
If the drain pipe is plugged or in any case in which the condensate isn’t correctly evacuated, the condensate level in the trap rises till it reaches the detection electrode in the combustion chamber thus causing the boiler lock---out.
Fig. 21.2
45
1
4
5
6
22
Short spare parts list
Key G.C. part no.
Description
2
3
H58---688
H58---689
E94---576
H58---659
H58---660
H58---702
H58---694
H50---189
Burner (mod. M110B.24SM/... M110B.24SR/...)
Burner (mod. M110B.32SM/...)
Expansion vessel
Condensing heat exchanger (mod.
M110B.24SM/... M110B.24SR/...)
Condensing heat exchanger (mod.
M110B.32SM/...)
Fan
Gas valve
Safety valve
7 H58---717
H58---718
8 E01---205
H05---161
H58---670 9
10 H32---555
11 169---010
12 E00---688
13 E83---086
14 E83---101
15 H58---661
16 H44---170
17
18 164---026
19 H58---709
20 H58---680
21 E83---145
Electronic regulation p.c.b. (mod.
M110B.24SM/... M110B.24SR/...)
Electronic regulation p.c.b. (mod.
M110B.32SM/...)
D.h.w. heat exchanger (M110B.24SM/...)
D.h.w. heat exchanger (M110B.32SM/...)
Pump
Primary circuit flow switch
D.h.w. flow switch
Main. flow switch membrane
Three way diverter valve (electric actuator)
Overheat thermostat
Flue temperature probe NTC
Fuse 3,15 AF
Fuse 400 mA T
Temperature probe (main or D.h.w. circuit)
Detection electrode
Ignition electrode
Temperature---pressure gauge
1
1
1
1
1
1
1
2
1
1
1
2
1
1
1
1
1
1
1
1
1
1
1
1
1
Q.ty Manufacturer part no.
BI1293 100
BI1293 101
Manufacturer’s reference
BI1182 105 CIMM 7 litres
BI1432 100
BI1432 101
BI1293 105
BI1293 104
BI1181 100 Watts
Orkly (alternative)
BI1955 100 Bertelli & Partners
BI1955 101
EBM RG128 24V 54W
SIT 848 Sigma
BI1001 102
BI1161 100
BI1911 103
BI1251 501
KI1042 107
BI1011 103
BI1101 102 Elbi
BI1172 105 ELTH --- type 261
BI1432 102
BI1295 108
BI1665 104
KI1001 117
BI1293 103
BI1293 102
BI1475 108 IMIT
46
1
7
4
2
3
Short spare parts list
5
6
9
8
10
11
12
13
14 15 16 17
18
19
20
21
47
*1796213402*
17962.1340.2
2008 52A4 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
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