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2.12

ASSEMBLY OF GAS UNIT

To assemble the gas unit, which comes
supplied  in  a  separate  cardboard
package,  first  remove  the  half  pipe
union that is on the unit and screw it to
the bent pipe connected to the burner

manifold (fig. 11). Then insert the sen-
sors  of  the  instruments  into  their
sheath, as described in section 2.11.

IMPORTANT: To ensure correct boiler
temperature  control,  the  bulbs  of
control and safety components must

be inserted in the sheath on the side
where  the  C.H.  flow/return  connec-
tions are located. 
If  the  C.H.  flow/return  connections
have  been  moved  to  the  left  side  of
the generator, the gas/control panel
assembly  must  be  moved  onto  the
left  side  as  well  to  permit  this
arrangement. 

Unwind  the  wires  of  the  two  sensors,
getting them to pass through the bush
provided  on  the  front  panel  (6  fig.  11)
and  through  the  gland  on  the  lower
front wall (11 fig. 10). Insert the ignition
electrode in the hole between the head
and  the  intermediate  section,  on  the
same side as the gas unit, fastening it to
the  two  stud  bolts  (fig.  12).  Repeat  the
same operation for the sensing electro-
de,  which  will  fit  in  the  hole  provided
between the head and the intermediate
section at the other end of the body.

NOTE:  Take  the  utmost  care  when
assembling the two electrodes, so as
not  to  break  the  ceramic  coating,
which otherwise would require imme-
diate replacement of the electrode.
After assembly, all the gas connections
must  be  tested  for  tightness  using
soapy  water  or  appropriate  products.
DO NOT USE NAKED FLAMES.

2.13

ELECTRICAL CONNECTION

Electric  power  supply  must  reach  the

54

KEY
1 Electric control board
2 Gas valve
3 Pressure intake
4 Gas pressure switch
5 Bulb of the instruments
6 Bush for electrode wires
7 Second gas solenoid valve
8 R.H. sheath

Fig. 11

KEY
1 Ignition electrode
2 Stud bolt M5 x 15
3 Washer ø 5,3
4 Nut M5 OT
5 R.H. head
6 Intermediate section with boss

Fig. 12

KEY

1 Front and rear support 

of casing base

2 R.H. support of casing base
3 L.H. support of casing base
4 L.H. side lower rear panel
5 L.H. side upper rear panel
6 L.H. side front panel
7 R.H. side lower rear panel
8 R.H. side upper rear panel
9 R.H. side front panel

10 Cover
11 Lower front wall
12 Upper front wall (cleaning plate)
13 Rear wall
14 Base strip
15 Door
16 Upper front panel

NOTA: The position of the panels (6)
and (9) can be reversed; make sure,
however,  that  the  panel  with  slits  is
always placed on the side where the
gas unit comes out.

Fig. 10

Summary of Contents for RS 10

Page 1: ...RS IT ES GB PT...

Page 2: ...rge the system bleeding off the air present in the gas pipe by operating the pressure relief valve on the gas valve inlet Make sure that none of the regulation control and safety devices and appurtena...

Page 3: ...II2H3 II2H3 II2H3 II2H3 II2H3 II2H3 II2H3 II2H3 II2H3 Type B11 B11 B11 B11 B11 B11 B11 B11 B11 Maximum temperature C 95 95 95 95 95 95 95 95 95 Mains gas nozzles Quantity n 5 6 7 8 9 10 11 12 13 Meth...

Page 4: ...limiting pressure loss between the gas meter and any apparatus being used to not greater than 1 0 mbar for family II gases natu ral gas 2 0 mbar for family III gases butane or propane An adhesive data...

Page 5: ...must be at least 500 mm Access to the chamber must be guaranteed by means of an opening provided with an air tight metal door have a circular square or rectangu lar internal cross section in the case...

Page 6: ...pieces which are to be joined together using the screws provided fig 5 The smoke chamber is assembled by fastening the right hand side panel 2 to the top panel 1 using the nine hexagonal head self tap...

Page 7: ...l 6 and the panels 7 and 8 to the panel 9 by means of the pressure pins making sure that they are joined together using the two self tapping flathead screws 7SP x 1 2 provided assemble the panels 4 an...

Page 8: ...provided between the head and the intermediate section at the other end of the body NOTE Take the utmost care when assembling the two electrodes so as not to break the ceramic coating which otherwise...

Page 9: ...rough the SM 191 1 programmer and the gas valve opens at the same time Burner ignition normally takes place within 1 or 2 seconds However it is possible for ignition failures to occur with consequent...

Page 10: ...regu lating thermostat with a double con tact having differentiated setting This makes it possible to obtain a reduction of heat output before the burner goes out completely by means of the coil asse...

Page 11: ...4085 is supplied by a rectified con nector code 6243600 which in the event of breakage must be replaced To replace it follow the instructions of fig 18 4 USE AND MAINTENANCE KEY 1 Electric operator 2...

Page 12: ...e minimum posi tion until you hear the click of the first contact of the thermostat leave the knob in that position and turning the screw 4 seek the reduced pressure value according to Table 3 for the...

Page 13: ...upon first ignition or after long periods of lay off Check whether the rectifier card on the connector that supplies the gas solenoid valve is working properly If necessary replace Valve coil has a b...

Page 14: ...scharge cur rent to the ignition electrode and simul taneously opening the gas valve Ignition of the burner normally takes place within 1 or 2 seconds For various reasons the boiler may fail to start...

Page 15: ...y to convert to a different gas from that for which the boiler has been arranged get in touch exclusively by authorized technical staff CLEANING AND MAINTENANCE At the end of each heating season it is...

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