Sime Format 25/60 OF, Format 30/60 BF, Format 25/60 BF Installer's Instructions

CONTENTS

1 DESCRIPTION OF THE BOILER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pag. 73

2 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pag. 76

3 CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pag. 84

4 USE AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pag. 87

INSTALLER INSTRUCTIONS

IMPORTANT

When carrying out commissioning of the boiler, you are highly recommended to perform the following checks:

– Make sure that there are no liquids or inflammable materials in the immediate vicinity of the boiler.

– Make sure that the electrical connections have been made correctly and that the ear th wire is connected to a

good earthing system.

– Open the gas tap and check the soundness of the connections, including that of the burner.

– Make sure that the boiler is set for operation for the type of gas supplied.

– Check that the flue pipe for the outlet of the products of the combustion is unobstructed and has been pro-

perly installed.

– Make sure that any shutoff valves are open.

– Make sure that the system is charged with water and is thoroughly vented.

–

Check that the circulating pump is not locked (CAUTION: Remember to release the pump coupled with the control

panel, if necessary, to protect the electronic control card).

– Purge the system, bleeding off the air present in the gas pipe by operating the pressure relief valve on the gas

valve inlet.

FORMAT 25-30/60

ENGLISH

FONDERIE SIME S.p.A. of Via Garbo 27 - Legnago (VR) - Italy declares that its hot water boilers, which bear the CE mark under

Gas Directive 90/396/CEE and are fitted with a safety thermostat calibrated to a maximum of 110°C, are not subject to appli­cation of PED Directive 97/23/CEE as they meet the requirements of article 1 paragraph 3.6 of the Directive.

1.1 INTRODUCTION

The “FORMAT” wall hung boilers with
D.H.W. storage tank allow for a multiple
number of requests to be met thanks to the
abundance of available water which the
capacious tank unit makes possible.
They comply with the European directives
90/396/EEC, 89/336/EEC, 73/23/EEC,

92/42/EEC and the European norms EN
483 - EN 625.
They may be fuelled by natural gas (metha­ne) and butane gas (G30) or propane (G31).
In this manual you will find the instructions
relative to the following boiler models:

– “FORMAT 25/60 OF”

with electronic ignition and modulation,

open chamber, natural draught.

– “FORMAT 25/60 BF - 30/60 BF”

with electronic ignition and modulation,
room sealed, forced draught.

Follow the instructions given in this manual
for the correct installation and perfect func­tioning of the appliance.

73

1 DESCRIPTION OF THE BOILER

1.2 DIMENSIONS

1.2.1 “25/60 OF” model

600

13 5

D

865

225

110

495

782

460

=

=

25

12 5

80 70 70 70 107

EUCMRG

63

Fig. 1

600

10 5

865

235

110

495

782

460

=

=

25

12 5 80 7 0 70 7 0 10 7

E

U

CMRG

ø100/60

910

63

Fig. 1/a

1.2.2 “25/60 BF - 30/60 BF” models

CONNECTIONS
R C.H. return 3/4”
M C.H. flow 3/4”
G Gas connection 3/4”
E D.H.W. inlet 1/2”
U D.H.W. outlet 1/2”
C Re-circulation 1/2”

CONNECTIONS
R C.H. return 3/4”
M C.H. flow 3/4”
G Gas connection 3/4”

E D.H.W. inlet 1/2”
U D.H.W. outlet 1/2”
C Re-circulation 1/2”

25/60 OF

D ø mm 130

74

1.3 TECHNICAL FEATURES

(1) Flow calculated with a fixed temperature on the D.H.W. potentiometer of 60 °C for a maximum period of 10 minutes
(2) The gas consumptions refers to the calorific value at standard conditions at 15°C - 1013 mbar
(3) Dif ferential measure between the pressure upstream of the gas valve and the depr ession in the sealed room

25/60 OF 25/60 BF 30/60 BF

Heat output

Nominal kW 8,4 ÷ 23,2 9,3 ÷ 25,0 11,6 ÷ 29,5

kcal/h 7.200 ÷ 20.000 8.000 ÷ 21.500 10.000 ÷ 25.400

Minimum kW 8,4 9,3 11,6

kcal/h 7.200 8.000 10.000

D.H.W. heat output

Nominal kW 23,2 25,0 29,5

Heat input

Nominal kW 10,8 ÷ 25,8 10,8 ÷ 26,7 13,5 ÷ 31,6

Minimum kW 10,8 10,8 13,5

Water content l 445

Adsorbed power consumption W 105 165 180

Electrical protection grade

IP X4D IP X4D IP X4D

Maximum water head bar 3 3 3

Maximum temperature °C 85 85 85

Expansion vessel

Water content/Preloading pressure l/bar 8/1 8/1 8/1

C.H. setting range °C 40÷80 40÷80 40÷80

D.H.W. setting range ° C 10 ÷6 0 10 ÷6 0 10 ÷6 0

D.H.W. production

Tank capacity l 60 60 60

Continuous D.H.W. flow rate at ∆t 30°C l/h 684 684 774

Specific D.H.W. flow rate EN 625

(1)

l/min 14,5 14,5 16,1

D.H.W. maximum water head bar 7 7 7

Recovery time from 25°C to 55°C min 4’ 30” 4’ 30” 4’

D.H.W. expansion vessel l 2,5 2,5 2,5

Smoke temperature °C 110 123 123

Smoke flow gr/s 21,0 17,0 20,0

Category II2H3+ II2H3+ II2H3+

Type B11BS

C12 - C32 - C42 - C52 C12 - C32 - C42 - C52

Weight kg 74 82 82

Main gas nozzles

Quantity n° 13 13 15

Methane ø mm 1,30 1,30 1,30

G30 - G31 ø mm 0,75 0,76 0,76

Gas flow

(2)

Methane m3st/h 2,73 2,83 3,34

Butane (G30) kg/h 1,99 2,06 2,44

Propane (G31) kg/h 1,96 2,03 2,40

Gas burner pressure

Methane mbar 1,8÷9,7 1,9÷10,8

(3)

1,7÷11,3

(3)

Butane (G30) mbar 4,7÷27,4 4,7÷28,4

(3)

4,7÷28,1

(3)

Propane (G31) mbar 6,3÷35,3 4,7÷35,3

(3)

4,7÷35,9

(3)

Gas supply pressure

Methane mbar 20 20 20

Butane (G30) mbar 30 30 30

Propane (G31) mbar 37 37 37

75

7

1

6

24

2

3

4

18

15

8

28

9

19

20

16

13

14

27

12

22

26

21

17

23

5

25

11

8

28

10

14

G

R

M

C

U

E

1.4 FUNCTIONAL DIAGRAM

KEY

1 Fan (“25/60 BF - 30/60 BF” versions)
2 Water-gas exchanger
3 Combustion chamber
4 Gas valve
5 D.H.W. tank
6 Heating sensor
7 Safety stat 100°C
8 Air vent valve

9 C.H. pump
10 D.H.W. pump
11 Expansion vessel
12 D.H.W. safety valve
13 Safety valve
14 Boiler drain
15 Water pressure switch
16 Automatic by-pass
17 D.H.W. expansion vessel
18 Gas cock (optional)
19 C.H. return cock (optional)
20 C.H. flow cock (optional)
21 D.H.W. cock (optional)
22 D.H.W. drain cock
23 D.H.W. sensor (SB)
24 Limit st at 80°C
25 Magnesium anode
26 Fixing jig (optional)
27 Filling cock
28 Non return valve

1.5 MAIN COMPONENTS

17

16

15

14

13

12

11

1

2

3

4

5

6

7

8

9

10

Fig. 3

KEY

1 Control panel
2 Gas valve
3 C.H. pump
4 Non return valve
5 Burner
6 Water pressure switch

7 Water-gas exchanger
8 Limit stat 80°C
9 Fan (“BF” version)

Smoke stat (“OF” version)

10 Smoke pressure switch (“BF” version)

Smoke chamber (“OF” version)

11 Expansion vessel
12 D.H.W. storage tank
13 Safety stat 100 °C
14 Heating sensor (SM)
15 Air vent valve
16 D.H.W. pump

17

16

15

14

12

13

11

1

2

3

4

5

6

7

8

9

10

FORMAT 25/60 OFFORMAT 25/60 BF - 30/60 BF

Fig. 2

The boiler must be installed in a fixed loca­tion and only by specialized and qualified
firms in compliance with all instructions
contained in this manual.
Furthermore, the installation must be in
accordance with current standards and
regulations.

2.1 VENTILATION OF
BOILER ROOM

The “25/60 OF”

version boilers must be
installed in adequately ventilated domestic
rooms. It is essential that in rooms where
the boiler are installed at least as much air
can arrive as required by normal combu­stion of the gas consumed by the various
appliances. Consequently, it is necessary to
make openings in the walls for the air inlet
into the rooms. These openings must meet
the following requirements:

– have a total free section of at least 6

cm2for every kW of heat input, with a
minimum of 100 cm2;

– They must be located as close as possi-

ble to floor level, not prone to obstruc­tion and protected by a grid which does
not reduce the effective section required
for the passage of air.

The “25/60 BF - 30/60 BF” version boi­lers may instead be installed, without any
constraints regarding location or supply of
air for combustion, in any domestic rooms.

2.2 BOILER SUPPORT BRACKET

For the mounting of the suppor t bracket of
the boiler, which is supplied, observe the fol­lowing instructions (fig. 4):
– Fix the bracket to the wall with appro-

priate dowels.

– Check with a spirit level that it is perfec-

tly in horizontal plane.

2.2.1 Fixing jig (optional)

The fixing jig code 8081209 is supplied with
an instruction sheet for the fixing.

2.2.2 Fitting the pipe elbows (optional)

To fit the connecting elbows supplied in kit
code 8075419, follow the instructions
reported in fig. 5.

2.2.3 Fitting isolating valves (optional)

To fit the isolating valves, supplied in kit code
8091807, follow the instructions mentioned
in fig. 6.

2.2.4 Replacement wall kit
for other makes (optional)

The kit code 8093900 is supplied comple­te with mounting instructions.

2.3 CONNECTING UP SYSTEM

Before proceeding to connect up the boiler,
you are recommended to make the air cir­culating in the piping in order to eliminate
any foreign bodies that might be detrimen­tal to the operating ef ficiency of the applian­ce. When making the hydraulic connections,
make sure that the dimensions indicated in
fig. 1 are respected.

The discharge pipe of the safety valve
must be connected to a collector funnel
for channelling away any discharge if the
safety valve goes into action.

The gas connection must be made using
seamless steel pipe (Mannesmann type),
galvanized and with threaded joints provi­ded with gaskets, excluding three-piece con­nections, except for initial and end connec­tions. Where the piping has to pass through
walls, a suitable insulating sleeve must be
provided. When sizing gas piping, from the
meter to the boiler, take into account both
the volume flow rates (consumption) in
m3/h and the relative density of the gas in
question.
The sections of the piping making up the
system must be such as to guarantee a
supply of gas sufficient to cover the maxi­mum demand, limiting pressure loss
between the gas meter and any apparatus
being used to not greater than:
–

1.0 mbar for family II gases (natural gas);

– 2.0 mbar for family III gases (butane or

propane).

An adhesive data plate is sticked inside the
front panel; it contains all the technical data
identifying the boiler and the type of gas for
which the boiler is arranged.

76

2 INSTALLATION

Fig. 4

KEY

1 Fixing jig
2 Copper pipe 3/4”x18
3 Gasket ø 24/17
4 Gas cock 3/4”MF
5 Elbow 3/4”x 18
6 Gasket ø 18,5/11,5
7 Elbow 1/2”x14
9 Elbow 1/2”x14

Fig. 5

KEY

1 Fixing jig
2 Straight coupling 1/2”x14
3 Gasket ø 18,5/11,5
4 Elbow 1/2”x14
5 D.H.W. cock stub pipe
6 D.H.W. cock 1/2”MF
7 C.H.-D.H.W cock

3/4”MF
8 Gasket ø 24/17
9 Gas cock 3/4”MF

10 Straight coupling 3/4”x18
11 Copper pipe 3/4”x18
12 Straight coupling

3/4”x18 with olive

13 Flow cock:

yellow (“25/60” vers.)

and brown (“30/60” ver s.)

Fig. 6

2.3.1 Filter on the gas pipe

The gas valve is supplied ex factory with an
inlet filter, which, however, is not adequate to
entrap all the impurities in the gas or in gas
main pipes. To prevent malfunctioning of the
valve, or in cer tain cases even to cut out the
safety device with which the valve is equip­ped, install an adequate filter on the gas pipe.

2.4 CHARACTERISTICS
OF FEEDWATER

To prevent lime scale and damage to the
tap water exchanger, the water supplied
should have a hardness of no more than
20°F. In all cases the water used should be
tested and adequate treatment devices
should be installed. To prevent lime scale or
deposits on the primar y exchanger, the
water used to supply the heating circuit
should must be treated in accordance with
UNI-CTI 8065 standards. It is absolutely
essential that the water is to be treated in
the following cases:
– very extensive system (with high con-

tents of feedwater);

– frequent addition of makeup water into

the system;

– should it be necessary to empty the

system either par tially or totally.

2.5 SYSTEM FILLING

The filling of the boiler and of the system is
carried out by pressing the filling cock loca­ted on the bottom of the boiler (fig. 7).
The filling pressure of the system cold must
be 1 bar. Once the filling has been comple-

ted, close the filling cock.

2.6 FLOW REGULATOR (fig. 7/a)

At the inlet of the hot water a flow regulator
can be installed, from 10 l/min (yellow) for
the “25/60” version and from 12 l/ min
(brown) for the “30/60” version; the regu­lator is supplied in the kit of the connecting
taps code 8091805.

2.7 FLUE

The flue for the atmospherical expulsion of
the combustion products from natural
draught appliances must meet the following
requirements:
–

Be gas-tight to the combustion products,
waterproof and thermally insulated.

–

Be built of materials suitable for keep
resisting to normal mechanical stresses,
heat, and the action of combustion pro­ducts and their possible condensates.

– Follow a ver tical path and not present

any throttling throughout its entire
length.

– Be adequately insulated to prevent phe-

nomena of condensation or smokes coo­ling, in particular if located outside the
building or in unheated ambiences.

– Be set at an adequate distance from

combustible or easily inflammable mate­rial by means of an air gap or suitable
insulating material.

– Have beneath the mouth of the first

smoke duct a chamber for collecting
solid material and any condensate; the
height of the chamber 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 rectangular

internal cross section; in the case of
square or rectangular sections, the cor­ners must be rounded off with a radius
of not less than 20 mm. However,
hydraulically equivalent cross sections
are allowed.

– Be equipped with a chimney-pot at the

top, which must be outside the so-called
back-flow zone, so as to prevent the for­mation of back-flow, which prevents free
discharge of the products of combustion
into the atmosphere.

– Be devoid of mechanical means of suc-

tion located at the top of the pipe.

– No overpressure should be present in a

chimney that passes within or close up
to inhabited rooms.

2.7.1 Connecting up flue

Fig. 8 refers to the connection of the boiler

“25/60 OF” to the flue or chimney throu­gh smoke ducts. When making the con­nection, in addition to respecting the
dimensions given, you are recommended
to use gas-tight materials capable of resi­sting over time mechanical stresses and
the smokes heat.
At any point along the smoke duct, the tem­perature of the combustion products must
be higher than the dew point. More than a
total of three changes of direction must not
be made, including the inlet connection to
the chimney/flue. For any changes of direc­tion use only curved pipe lengths.

Fig. 8/a shows some applications of drau­ght terminals that ensure proper expulsion
of the combustion products, in case of
discharge through the wall.

77

Fig. 8

Fig. 7

Fig. 7/a

CLOSE

Fig. 8/a

2.8 COAXIAL DUCT

“25/60 BF -30/60 BF”

The coaxial inlet and outlet duct ø 60/100
is supplied in a kit code 8084805 complete
with mounting instructions.

2.8.1 Diaphragm installation

The diaphragm is supplied together with the
“30/60 BF” boiler version.
See figure 9 for the positioning.

ATTENTION:
Install the diaphragm only when the
length of the ø 60/100 coaxial duct is
less than 1 m.

2.8.2 Coaxial duct

accessories

The accessories necessary for the realisa­tion of this type of discharge and some of
the connecting systems that can be used
are shown in fig. 10.

With the elbow supplied in the kit the
maximum length of the duct should not be
greater than 3 metres.

2.8.3 Positioning the

outlet terminals

The outlet terminals for forced-draught
appliances may be located in the external
perimeter walls of the building.
To provide some indications of possible solu­tions, Table 1 gives the minimum distances
to be observed, with reference to the type
of building shown in fig. 11.

2.8.4 Roof outlet

coaxial duct

The roof outlet terminal L.1284 cannot be
shortened and the positioning of the tile
distances must be no less than 600 mm
from the discharge terminal outlet (fig. 12).
The fittings required for this type of dischar­ge and some of the connecting systems
that can be used are shown in fig. 13.

Up to a maximum of three extensions can
be added to reach a rectilinear length of

3.7 m. If it proves necessary to provide for

78

KEY

1a-b Coaxial duct kit code 8084802

2 Extension L.815 code 8084800
3 Vertical extension L.584 code 8086900
4 Supplementary 90° elbow code 8085600

TABLE1

Siting of terminal Appliances from 7 t o 35 kW

(distances in mm)
A - below openable window 600
B - below ventilation opening 600
C - below eaves 300
D - below balcony (1) 300
E - from adjacent window 400
F - from adjacent ventilation opening 600
G - from horizontal or ver tical soil or drain pipes (2) 300
H - from corner of building 300
I - from recess in building 300
L - from ground level or other treadable surface 2500
M - between two terminals set vertically 1500
N - between two t erminals set horizontally 1000
O - from a surface facing without openings or terminals 2000
P - as above but with openings and terminals 3000

Fig. 11

Fig. 10

1

) Terminals below a practicable balcony must be located in such a way that the total

path of the smoke from its outlet point from the terminal to its outlet point from the
external perimeter of the balcony, including the height of possible railings, is not less
than 2000 mm.

2) When siting terminals, where materials that may be subject to the action of the combu­stion products are present in the vicinity, e.g., eaves, gutters and downspouts painted or
made of plastic material, projecting timberwork, etc., dist ances of not less than 1500 mm
must be adopted, unless adequate shielding is provided to guard these materials.

Fig. 9

IMPORTANT:
Each additional 90° curve installed reduces the
available length by 0.90 metres.
Each additional 45° curve installed reduces the
available length by 0.45 metres.

two changes of direction in the duct, the
maximum length must not be greater
than 2 m.

2.9 SEPARATE DUCTS
“25/60 BF -30/60 BF”

In the installation it is best to observe the
directions requested by the Norms and a
few practical considerations:
– With direct external suction, when the

duct is than 1 m in length, insulation is
recommended in order to avoid, in parti­cularly cold periods, the formation of
dew on the outside of the tubing.

– With discharge duct positioned on the

outside of the building, or in cold environ­ments, insulation is necessary to avoid
starting failures of the burner. In such
cases, a system for the collection of con­densation must organised.

–

If a segment of the flue passes through
a flammable wall, this segment must be
insulated with a glass wool pipe insula­tor 30 mm thick, with a density of 50
kg/m

3

.

The maximum total length obtained by
summing up the lengths of the suction and
discharge tubing is determined by the load
losses of the single fittings attached (exclu­ding the splitter) and must not be greater
than 8.00 mm H20 (vers. “25/60”) and

9.00 mm H2O (vers. “30/60”). For the load
losses of the fittings refer to Table 2.

2.9.1 Fittings separate ducts

A kit code 8093000 (fig. 14) is supplied for

the realisation of this type of discharge.
The sector diaphragm that comes with the
kit must be used as indicated in fig. 15
according to the maximum load loss

allowed in both ducts.
The complete range of the fittings neces­sary for each type of installation is given in
fig. 16.

79

KEY
1 Tile with articulated joint
2 Lead panel
3 Collar
4 Locking screw

Fig. 12

Fig. 13

KEY
1 Vertical extension L. 194

with take-off point code 8086903
2 Extension L. 815 code 8084804
3 Tile with articulation joint code 8091300
4 Roof outlet terminal L. 1284 code 8091200
5 Supplementaty 90° elbow code 8085601

Example of allowable installation calculation (“25/60” version) in that the sum of the head
losses of the single fittings is less than 8.00 mm H

2

O:

Intake Outlet

7 meter horizontal pipe ø 80 x 0.20 1.40 –
7 meter vertical pipe ø 80 x 0.30 – 2.10
n° 2 90° elbows ø 80 x 0.30 0.60 –
n° 2 90° elbows ø 80 x 0.40 – 0.80
N° 1 terminal ø 80 0.10 0.30

Total head loss 2.10 + 3.20 = 5.3

mm H2O

With this total head loss, remove the ø 38 baffle from the intake pipe.

TABLE 2

Accessories ø 80 Head loss (

mm H2O)

“25/60” version “30/60” version

Inlet Outlet Roof outlet Inlet Outlet Roof outlet

90° elbow MF 0.30 0.40 – 0.30 0.50 –
45° elbow MF 0.20 0.30 – 0.20 0.40 –
Extension L. 1000 (horizontal) 0.20 0.30 – 0.20 0.40 –
Extension L. 1000 (ver tical) 0.30 0.20 – 0.30 0.30 –
Outlet terminal – 0.30 – – 0.40 –
Intake terminal 0.10 – – 0.10 – –
Doubler fitting 0.20 – – 0.30 – –
Roof outlet terminal L. 1390 – – 0.50 – – 0.60
Tee condensation outlet – 1.00 – – 1.10 –

105

120

150

ø80

4

3

1

2

80

Fig. 14

KEY
1 Sponge-rubber gasket ø125/95
2 Fixing screw
3 Air-smokes flow splitting unit

with take-off point

4 Sectors of diaphragm ø 38

Fig. 15

Fig. 16

KEY
1 Air-smokes flow plitting unit

with take-off point code 8093000
2a 90° elbow MF code 8077404
2b Isolated 90° elbow MF code 8077408
3a Extension L. 1000 code 8077303
3b Isolated extension L. 1000 code 8077306
4 Outlet terminal code 8089501
5 Int.-est. ring kit code 8091500
6 Intake terminal code 8089500
7 45° elbow MF code 8077406
8 Condensation outlet L. 135 code 8092800
9 Locking junction (n. 5) code 8092700

Sectors of diaphragm Total head loss

to remove mm H

2OPa

0 0 ÷ 2 0 ÷ 19,6
2 2 ÷ 3 19,6 ÷ 29,4
4 3 ÷ 4 29,4 ÷ 39,2
6 4 ÷ 5 39,2 ÷ 49,0

Remove diaphragm 5 ÷ 8 49,0 ÷ 78,4

Sectors of diaphragm Total head loss

to remove mm H

2OPa

4 0 ÷ 4 0 ÷ 39,2
5 4 ÷ 5 39,2 ÷ 49,0
6 5 ÷ 6 49,0 ÷ 58,8

Remove diaphragm 6 ÷ 9 58,8 ÷ 88,2

“25/60” version

“30/60” version

SECTOR OF DIAPHRAGM

2.9.2 Roof outlet separate ducts

The roof outlet terminal L. 1390 cannot be
shortened and in the positioning of the tile
the distance from the discharge outlet of
the terminal must not be less than 700 mm
(fig. 17). The fittings necessary for this type
of discharge and some of the other type of
systems that it is possible to use are shown
in fig. 18. By utilising the manifold (7 fig. 18)
it is possible to have a concentric discharge.
In these cases, during assembly, it is neces­sary to get the washer in silicon used on the
reduction of the terminal (5 fig. 17) to be
substituted with the manifold and place it in
the housing of the manifold.

For this type of discharge the sum of the
maximum development allowed of the
ducts must not be greater than 8.00 mm
H2O (vers. “25/60”) - 9.00 mm H2O (vers.
“30/60”).

To calculate the load losses of the single fit­tings attached refer to Table 2.

2.10 ELECTRICAL CONNECTION

The boiler is supplied with an electric supply
cable, which in case of replacement must
be requested from SIME. The supply must
be carried out with a monophase voltage of
230V - 50 Hz via a general switch protec­ted by fuses, with a distance between con­tacts of at least 3 mm. Observe the L-N
polarities and the earth connection.

NOTE: Device must be connected to an
efficient earthding system. SIME declines

any responsibility for damages to persons
or objects due to failing to earth the boiler.

2.10.1 Control board (fig. 19)

To access the electrical panel, turn off the
power supply and then remove the front
panel and the two screws that anchor the
control panel to the sides (see point 4.6).
The panel will move towards the bottom at
an angle that will allow access to the com­ponents. To remove the protection (6)
unscrew the fixing screws and with a screw­driver press on the upper splines to detach
them from the control panel.

2.10.2 Room stat
connection (fig. 19)

In order to have access to the “TA” con-
nector, remove the cover (7) of the con­trol panel and electrically connect the
room stat to the terminals 10-11 after
having removed the existing bridge.

The thermostat or chronothermostat to
be used, whose installation allows a bet­ter regulation of the temperature and
comfort of the environment, must be
class II in compliance with norm EN

60730.1 (clean electrical contact).

81

KEY
1 Tile with articulated joint
2 Lead panel
3 Collar
4 Locking screw
5 Reducing fitting with washer

Fig. 17

Fig. 18

KEY

1 Air-smokes flow splitting unit

with take-off point code 8093000

2 a 90° elbow MF

code 8077404
2 b Isolated 90° elbows MF code 8077408
3 a Extension L. 1000 code 8077303
3 b Isolated extension L. 1000 code 8077306
4 Int.-est. ring kit code 8091500
5 Intake terminal code 8089500
6 Locking junction (n. 5) code 8092700
7 Doubler fitting code 8091400
8 Tile with ar ticulated joint code 8091300
9 Roof outlet terminal L. 1390 code 8091201

10 45° elbow MF code 8077406

11 Condensation outlet L. 135 code 8092800

12 Tee condensation outlet code 8093300

82

2.10.3 Wiring diagram “25/60 OF”

Fig. 20

KEY
F1 Fuse (F 1, 6A)
TR Transformer 230-24V
PI C.H. pump
PB D.H.W. pump
EV1 Gas valve coil
EV2 Gas valve coil
TF Smoke stat
TL Limit stat 80°C
M Modulator
PA Water pressure switch
C Rotary switch
SM Heating sensor (blue)
SB D.H.W sensor
TA Room stat
EAR Ignition/detection electr ode
TRA Ignition transformer
TS Safety stat 100°C

Note: The room stat or the chronothermostat must be connected to terminals 10-11 of the “TA” connector
after having removed the bridge.

12

6

7

5

8

3

4

Fig. 19

KEY
1 Thermometer
2 Time programmer
3 Rotary switch
4 Electronic board
5 Earth faston
6 Instrument protection
7 Room stat cover
8 Room stat connector (TA)

CONNECTOR SPARE PART CODES:

J2 cod. 6278622
J3 cod. 6278639
J5 cod. 6278624
J6 cod. 6278640

J10 cod. 6278641

83

2.10.4 Wiring diagram “25/60 BF -30/60 BF”

Fig. 20/a

KEY
F1

Fuse (F 1,6A)
TR Transformer 230/24V
PI C.H. pump
PB D.H.W. pump
EV1 Gas valve coil
EV2 Gas valve coil
V Fan
PF Smoke pressure switch
TL Limit stat 80 °C
M Modulator

PA Water pressure switch
C Rotary switch
SM Heating sensor (blue)
SB D.H.W. sensor
TA Room stat
EAR Ignition/detection electr ode
TRA Ignition transformer
TS Safety stat 100°C

Note: The room stat or the chro­nothermostat must be connected

to terminals 10-11 of the “TA” con­nector after having removed the
bridge

CONNECTOR SPARE PART CODES:

J2 cod. 6278622
J3 cod. 6278621
J5 cod. 6278625
J6 cod. 6278620

J10 cod. 6278623

3.1 ELECTRONIC BOARD

Made in accordance with the Low Voltage
EEC directive 73/23, supplied with 230
Volt; via a transformer it sends 24 Volt to
the following components: modulator, C.H.
and D.H.W. sensors, gas valve, limit stat,
room stat, water pressure switch and time
programmer.
An automatic and continuous modulating
system allows the boiler to adjust the power
to the various systems or user demands.
The electronic components are guaranteed
to work in a temperature range between 0
and +60 °C.

3.1.1 Functioning faults

The leds that show an irregular and/or
incorrect functioning of the boiler are
shown in fig. 21.

3.1.2 Devices

The electronic board has the following devi­ces (fig. 22):

– Trimmer “POT. RISC.” (1)

It regulates the maximum value of hea­ting power. To increase the value turn
the trimmer in a clockwise direction and
to decrease it turn the trimmer in an
anti-clockwise direction.

– Trimmer “POT. ACC.” (6)

Trimmer to vary the pressure level
(STEP) in the ignition of the gas valve. In
accordance with the type of gas for

which the boiler is predisposed, the trim­mer must be regulated so as to provide
the burner with a pressure of around 3
mbar for methane gas or 7 mbar for
butane (G30) and propane gas (G31).
To increase the pressure turn the trim­mer in a clockwise direction, to decrease
it turn the trimmer in an anti-clockwise
direction.
The level of pressure of slow starting is
able to be set during the first 3 seconds
from the star ting of the burner.
After having established the level of

pressure at starting (STEP) according to
the type of gas, check that the heating
gas pressure is still on the value previou­sly set.

– Connector “METANO-GPL” (4)

With the connector disconnected, the
boiler is ready to function with METHANE;
with the connector connected with GPL.

– Connector “ANN. RIT.” (5)

The electronic board is programmed, in
heating phase, with a technical pause by

84

3 CHARACTERISTICS

Fig. 22

KEY

1 “Heating Power” trimmer
2 Fuse (F 1,6A)
3 Hot-water service potentiometer
4 Connector “METHANE/GPL”

5 Connector “Delay cancellation”
6 “Start up Power” trimmer
7 Block red led
8 Heating potentiometer
9 Bi-colour led green/orange

10 Connector “TA”

NOTE: To have access to the regulating
trimmers (1) and (6) take off the hea­ting potentiometer knob.

Fig. 21

Bicolour green led off in case of no electricity

Bicolour orange led flashing in case of insufficient water pressure

Bicolour orange led flashing - C.H. sensor (SM) fault.

Bicolour green led flashing - in case of interception by the smoke safety device in

the version “25/60 OF”: reinstate the thermostat button to restore functioning.

Green led flashing - fan/pressure switch failure in the vers. “BF”.

Red led - ignition blocked / safety stat interception:

turn the rotary switch in the position

( ) to restore functioning

0

306090

120

bar

°C

034

1

B

A

C

6

1

2

3

5

9

7

6

1

8

4

10

85

the burner of around 90 seconds, both
at the beginning when the plant is cold
and in subsequent restartings.
This is so to avoid startings and swit­ching off with very short intervals, that
may in particular be found in plants with
high losses.
At every restarting, following the period
of slow starting, the boiler will position
itself for around 1 minute to the mini­mum modulating pressure to then return
to the set value of heating pressure.
With the insertion of the bridge both the
technical pause programmed and the
period of functioning at minimum pressu­re in the starting phase will be elimina­ted. In such a case, the time that runs
between the switching off and the next
starting will be in function of a variance
of 5°C, as detected by the heating sen­sor (SM).

ATTENTION: All of the operations descri­bed above must be carried out by authori­sed personnel.

3.2 TEMPERATURE DETECTION
SENSORS

In Table 3 the resistance (Ω) values are
given. They are obtained by the sensors
when the temperature varies.

With the C.H. sensor (SM) interrupted
the boiler will not function with both ser­vices. With the D.H.W. sensor (SB)
interrupted the boiler functions only
with heating.

3.3 ELECTRONIC IGNITION

The ignition and flame sensing are control­led by a single electrode on the burner that
guarantees the maximum safety, with a
time of intervention of one second for acci­dental switching of f or lack of gas.

3.3.1 Functioning cycle

Turn the rotary switch to summer or winter
and note, from the lighting up of the green
led, whether electricity is present. We can
summarise the manifestations of a failure
to start, with consequent activation of the
failure signal as follows:

– Lack of gas

The ignition electrode continues to spark

for a maximum of 10 seconds, the pilot
burner does not start, the apparatus is
blocked.

This may occur at the first ignition
attempt or after long periods of inactivity
with the presence of air in the tubing.
May be due to the gas tap being closed
or a break in the valve coil, which do not
allow opening.

– The ignition electrode does not spark.

In the boiler only the gas opening to the
burner is noted, after 10 seconds the
block signal lights up.

May be due to the fact that the cable of
the electrode is interrupted or is not well
fixed to the terminal of the ignition tran­sformer. The electrode is ear thed or
very worn and needs to be substituted.
The electronic board is faulty.

Due to a sudden fall in electricity the burner
is immediately arrested, once the electricity
is restored, the boiler will automatically
restart.

3.4 SMOKE SAFETY
DEVICE “25/60 OF”

It is a safety measure against the outflow of
smoke into the environment due to ineffi­ciency or a partial clogging up of the flue (9
fig. 3). It acts by blocking the gas valve when
the release of smoke into the environment
is continuous and in such a quantity as to be
dangerous. To restart the boiler, and reacti­vate the button of the thermostat. If the
blockage occurs repeatedly a thorough con­trol of the flue will be necessary, making all
the modifications and taking all the precau­tions necessary in order for it to be efficient.

3.5 SMOKE PRESSURE SWITCH
“25/60 BF -30/60 BF”

The smoke pressure switch with fixed set­tings 4.5-6 mm H2O (vers. “25/60”) and
10-13 mm H2O (vers. “30/60”) is able to
guarantee the functioning of the boiler even
with suction and discharge tubing at the
maximum limit length permitted (10 fig. 3).
Impurities and the formation of condensa­tion, most probable during the colder
periods of the season, could cause starting
failure of the boiler.

3.6 WATER PRESSURE SWITCH

A water pressure switch intercepts,
blocking the functioning of the burner
when the pressure in the boiler is less
than 0.5 bar (6 fig. 3).
To restore the functioning of the burner,
press on the charging key (fig. 7) and take
the pressure to a value between 1-1.2 bar.

3.7 SYSTEM AVAILABLE HEAD

The residual prevalence for the heating
plant is represented, according to flow, by
the graph in fig. 23.

3.8 TIME PROGRAMMER
OPTIONAL (fig. 24)

The control panel allows a time program­mer to be utilised for the management of
the heating, supplied on request in the kit
code 8092203.
For the assembly of the time programmer
remove the control panel and the cover for
the positioning and, with the panel open, fix
the clock to the panel with the screws spe-

TABLE 3

Temperature (° C) Resistance (Ω)

20 12.090
30 8.313
40 5.828
50 4.161
60 3.021
70 2.229
80 1.669

0

600

200

1600

140012001000800600400

PORTATA (l/h)

PREVALENZA RESIDUA (mbar)

500

400

10 0

200

300

25/60

30/60

Format e Planet 25 - 30/60

Fig. 23

FLOW RATE (l/h)

RESIDUAL HEAD (mbar)

cifically supplied.
Remove the faston that connects terminal
3 of the rotary switch and insert it in termi­nal 3 of the clock.
Complete the connection of the electric
clock as indicated in the diagram.

3.9 ELECTRICAL
CONNECTION
ZONE SYSTEMS

Use a separate electric line to link up the
room stats and relative zone valves or

pumps.
The connection of the micros or the
relay contacts is carried out on termi­nals 10-11 of the “TA” connector of elec­tronic panel after having removed the
existing bridge (fig. 25).

86

C

OP

KEY
OP Time programmer
C Rotary switch

Fig. 24

REMOVE

L

N

TA

TA

1

VZ

R

VZ1

R1

CIRCUITO CON VALVOLE DI ZONA

NOTA: I relé vengono impiegati solo nel caso
le valvole di zona siano prive di micro.

CIRCUITO CON POMPE DI ZONA

CR1

CR

Connettore "TA"

10 11

RL

Cavo

pompa

impianto

NOTA: Sostituire la pompa impianto della
caldaia con il tronchetto optional cod. 8094001.
Collegare il cavo della pompa impianto ad un
relè di potenza (RL).

L

N

TA1

CRL

R1

P

TA

R

P1

CR

CR1

LEYENDA
TA-TA1 Zone room stat
VZ-VZ1 Zone valve
R-R1 Zone relay
CR-CR1 Relay contact or micro zone valve
P-P1 Zone pump
RL Power relay
CRL Power relay contact

Pump cable

“TA” connector

CIRCUIT WITH ZONE VALVES CIRCUIT WITH ZONE PUMPS

NOTE: Relays are used only if the area
valves have no microswitches.

NOTE: Replace the heating pump with the option­al stub pipe, code 8094001. Connect the pump
cable to a power relay (RL).

Fig. 25

4.1 D.H.W. PRODUCTION

The preparation of hot water is guaranteed
by the tank unit in glass enamelled steel
with magnesium anode for the protection of
the tank unit and inspection flange for its
control and cleaning.

The magnesium anode must be checked
annually and substituted when it is worn.
If the boiler does not produce hot water,
make sure that the air has been released
by pressing on the manual outlets after
having switched off the main switch.

4.2 GAS VALVE

The boiler is produced with gas valve model
SIT 845 SIGMA (fig. 26) and gas valve
model HONEYWELL VK 4105M (fig. 27).
The gas valve is set at two pressure values:
maximum and minimum, that correspond,
according to the type of gas, to the values
indicated in Table 4.
The setting of the gas pressure at minimum
and maximum values is carried out by SIME:
variations are discouraged. Only in the pas­sing from one type of gas supply (methane)
to another (propane) is a change in the
working pressure allowed.

Such an operation must be carried out by
authorised personnel, or the guarantee
will lose validity. Once the change in
working pressure has been carried out,
seal the regulators.

When the gas pressures are to be reset,
this must be done following a set order

first
setting the MAXIMUM and then the MINI­MUM.

4.2.1 Maximum and minimum

pressure adjustment
SIT 845 SIGMA (fig. 29):

In order to carry out the setting of the maxi­mum pressure proceed in the following way:
– Connect the manometer to the down-

stream pressure plug of the gas valve.
In the “BF” versions, instead, connect
the manometer as shown in fig. 28.

–

Remove the plastic cap of the modulator (1).

– Place the heating potentiometer knob on

the maximum value.

– Start the boiler by pressing on the four

way switch and the hot water cock.

– Using a ø 10 wrench turn the nut (3) to

find the maximum pressure as shown in
Table 4: to reduce the pressure turn the
nut anti-clockwise, to increase the pres­sure turn the nut clockwise.

– Turn off and turn on the burner a few

times whilst keeping the hot water tap
constantly open to verify that the pressu­re corresponds to the values given in
Table 4.

After having regulated the maximum pres­sure, proceed with the setting of the mini­mum pressure:

87

4 USE AND MAINTENANCE

3

4

2

1

5

6

Fig. 26

KEY
1 Modulator
2 EV1-EV2 coils
3 Upstream pressure inlet
4 Downstream pressure inlet
5 VENT

TABLE 4

Burner max. Modulator Burner min. Modulator

Type of gas pressure current pressure current

mbar mA mbar mA

Methane (G20) 10 - 11 130 2 0
Butane (G30) 27 - 28 165 5 0
Propane (G31) 35 - 36 165 6 - 5 0

1

2

4 35

Fig. 27

1

2

3

4

Fig. 28

KEY
1 Modulator
2 EV1-EV2 coils
3 Upstream pressure inlet
4 Downstream pressure inlet
5 VENT

KEY
1 Downstream pressure inlet
2 VENT
3 Sealed chamber
4 Differential manometer

– Disconnect the electric supply of the

modulator.

– With the D.H.W. potentiometer knob on

the maximum value, the hot water cock
open and the burner alight, holding the
nut (3) blocked, turn the screw (2) to find
the minimum pressure value as shown in
Table 4: to decrease the pressure turn
the nut anti-clockwise and to increase
the pressure turn the nut clockwise.

– Turn on and turn of f the burner a few

times whilst keeping the hot water cock
constantly open and verify that the pres­sure corresponds to the values fixed.

– Reconnect the electrical supply of the

modulator.

– Replace the plastic cap (1)

4.2.2 Maximum and minimum
pressure adjustment
HONEYWELL VK 4105M (fig. 30)

To set the maximum pressure, proceed as
follows :
–

Connect the pressure column to the pres­sure inlet downstream of the gas valve.

– For the “BF” models connect the pressu-

re column as shown in fig. 28.

– Remove the plastic cap on the modula-

tor (1).

– Set the knob of the D.H.W. potentiome-

ter to the maximum value.
– Ignite the boiler and open the D.H.W. cock.
– Using a ø 9 spanner, turn the nut (3) to

achieve the maximum pressure value

given in

Table 4

: to reduce the pressure,
turn the nut counterclockwise; to increa­se the pressure, turn it clockwise.

–

Operate the main switch a number of
times, keeping the D.H.W. cock open all the
time, and check that the pressure corre­sponds to the values given in Table 4.

After adjusting maximum pressure, pro­ceed to calibrate minimum pressure:
–

Disconnect the electric power supply
from the modulator.

–

With the hot water potentiometer
knob set to the maximum, the hot
water tap turned on and the burner lit,
hold nut (3) locked in place and simulta­neously turn nut (2) using a fixed ø 7

wrench to identify the minimum pres­sure value shown in Table 4: turn the
nut anti-clockwise to reduce pressure
or clockwise to increase it.

– Turn the boiler on and off repeatedly

while keeping the hot water tap turned
on, checking that pressure corresponds
to the values shown in Table 4.

– Connect up the power supply to the

modulator again.

– Replace the plastic cap (1).

4.3 ADJUSTMENT OF
HEATING OUTPUT

To regulate the heating output, modifying
the factory settings whose power value is
around 16 kW, it is necessary to work with
a screwdriver on the trimmer of the heating
power (1 fig. 22).
To increase the operating pressure turn the
trimmer in a clockwise direction, to decrea­se the pressure turn the trimmer in an anti­clockwise direction. To facilitate the search

for the adjusting of the heating power the
diagrams pressure/ heat output for natu­ral gas (methane) and butane or propane
gas are available (fig. 31).

4.4 CONVERSION TO ANOTHER GAS

For the functioning with butane (G30) or
propane (G31) gas, a kit with that needed
for the conversion is supplied.
To convert from one gas to another carry
out the following operations (fig. 32):

88

3

2

1

Fig. 29

KEY
1 Plastic cap
2 Minimum pressur e

adjusting screws

3 Maximum pressur e

adjusting nut

Fig. 30

KEY
1 Plastic lid
2 Minimum pressur e

regulating nut

3 Maximum pressur e

regulating nut

11

10

9

8

7

6

5

4

3

2

1

8,1 (7.000) 11,6 (10.000) 17,4 (15.000) 23,2 (20.000)

POTENZA TERMICA kW (kcal/h)

PRESSIONE UGELLO mbar

29,0 (25.000)

12

25 30

Fig. 31/a

Pressure/heat output diagram for natural gas (methane)

HEAT OUTPUT kW (kcal/h)

NOZZLE PRESSURE mbar

89

– Close the gas tap
– Undo the burner group
–

Replace the main nozzles (5) supplied
in kit, and placing the copper washer
(4); to carry out this operation use a ø
7 wrench.

– Insert the bridge of the ìMETHANE-GPLî

connector of the electronic panel onto
the ìGPLî position (4 fig. 22).

–

For the setting of the values of the maxi­mum gas pressure and the minimum fol­low the indications as specified in point

4.2. Once the operating pressure changes
have been carried out seal the regulators.

– The supply pressure must never be

greater than 50 mbar.

– Once the operations have been finished

cover, with the label supplied, the gas

pre-setting data on the data tag.

NOTE: After assembly the sealing capa­city of all the gas connections must be
tested, using soapy water and special pro­ducts, and avoiding the use of naked fla­mes. The conversion must be carried out
only by authorised personnel.

4.5 DISASSEMBLY OF
EXPANSION VESSEL

To disassemble the expansion vessel pro­ceed in the following way:
– Make sure that the boiler has been emp-

tied of water

– Unscrew the union that connects the

expansion vessel and the screws that
release it from its bracket.

Before refilling the system, make sure that
the expansion vessel is pre-loaded to a pres­sure of 0.8÷1 bar.

4.6 REMOVAL THE OUTER CASING

For easy maintenance of the boiler it is pos­sible to completely dismantle the casing fol­lowing these simple instructions (fig. 33):
– Pull the front panel (5) fixed with pin clut-

ches forward.

– Unscrew the two screws that fix the con-

trol panel to the shell.

– Remove the side panel (6) by unscrewing

the two screws that fix it to the upper
bracket (7) and to the support control
panel. Push upwards to free it from the
notches in the right side.

20

15

10

5

8,1 (7.000) 11,6 (10.000) 17,4 (15.000) 23,2 (20.000)

POTENZA TERMICA kW (kcal/h)

PRESSIONE UGELLO mbar

25

30

0

29,0 (25.000)

25 30

35

20

15

10

5

8,1 (7.000) 11,6 (10.000) 17,4 (15.000) 23,2 (20.000)

POTENZA TERMICA kW (kcal/h)

PRESSIONE UGELLO mbar

25

30

0

29,0 (25.000)

25 30

Pressure/heat output diagram for propane gas (G31)

Fig. 31/b

Fig. 31/c

4

1

2

5

6

7

3

Fig. 32

KEY
1

Burner manifold
2 Extension 1/2”
3 Lock nut 1/2”
4 Washer ø 6,1
5 Nozzle M6
6 Protection
7 Burners

WARNING: To ensure a perfect
seal, always use the washer (4)
supplied in the kit when replacing
nozzles, even in burner units for
which it is not specified.

Pressure/heat output diagram for butane gas (G30)

HEAT OUTPUT kW (kcal/h)

NOZZLE PRESSURE mbar

HEAT OUTPUT kW (kcal/h)

NOZZLE PRESSURE mbar

– Unscrew the four lower screws that fix

the sides to the suppor t control panel
and the two screws that fix it to the
upper bracket (7). Push the sides (3) and
(4) upwards freeing them from the not­ches in the frame (2).

4.7 CLEANING AND
MAINTENANCE

Carry out the cleaning of the generator in
the following way:
– Remove the electricity supply to the boi-

ler and close the gas supply tap.

– Disassembly the casing as described in

point 4.6.

– Disassembly the burner - gas manifold

group (fig. 32).

– Clean direct a stream of air towards the

inner par t of the burner to blow out any
dust that has accumulated.

– Then clean the heat exchanger removing

dust and combustion deposits.

– In cleaning the heat exchanger and that

of the burner, chemical products or steel
brushes must never be used.

– Make sure that the top perforated part

of the burners is free of encrustations.

– During the assembly and disassembly of

the burner it is recommended that
attention be paid to the ignition and
detection electrodes.

– Reassemble the parts removed from the

boiler, observing the succession of the

phases.
– Check the functioning of the main burner.
– After the assembly all the gas connec-

tions must be checked for the seal, using

soapy water or specific products, avoi-

ding the use of naked flames.

Preventive maintenance and checking of
efficient operation of equipment and

safety devices must be carried out exclu­sively by authorized technical personnel.

4.7.1 Chimney sweep function

To carry out the verification of combustion
in the boiler turn the selector and stop on
the position ( ) until the green/ orange led
starts to flash intermittently (fig. 34).
From that moment the boiler will start func­tioning in heating mode at the maximum
power (20,000 - 25,000 kcal/ h), with swit­ching off at 80°C and restarting at 70°C.
Before activating the chimney sweep func­tion make sure that the radiator valves or
eventual zone valves are open.
The test may be carried out also during hot­water service functioning.
To do so it is enough, after having activated
the chimney sweep function, to take some
hot water from one or more cocks. Even in
this condition the boiler functions at the
maximum temperature always with the pri­mary controlled between 80°C and 70° C.
During the entire duration of the testing the
hot water taps must remain open.
After verifying the combustion the boiler
should be switched off by placing the selec­tor on the OFF position; then return the
selector to the desired function.

ATTENTION:
After about 15 minutes, or once the hot
water request has been fulfilled, the
chimney sweep function automatically
deactivates.

4.8 FAULT FINDING

The burner does not light up and the cir­culator functions.

– Check that the water pressure is on a

value of 1 - 1.2 bar.

– The water pressure switch is faulty and

needs to be replaced.

The main burner does not start either in
the hot water or heating drawing.

– Check and eventually replace the water

pressure switch.

– If the smoke stat has intercepted, then

reinstate it.

– Check that the coils of the gas valve are

receiving electricity, check the functio­ning and eventually replace it.

–

Check the functioning of the limit stat of
the smoke pressure switch (vers. “BF”).

– The fan works but at a reduced number

of turns and not activating the smoke
manostat, it is necessary to replace it
(vers. “BF”).

– Replace the electronic board.

The boiler starts up but after 10 seconds
it blocks.

– Check that in the electrical connection

the positions of phase and neutral have
been respected.

– The ignition/detection electrode is faulty;

90

2

3

1

4

1

5

1

6

7

Fig. 33

KEY
1 Screws
2 Frame
3 Left side
4 Right side
5 Front panel
6 Side panel
7 Upper bracket

SPIA LAMPEGGIANTE
VERDE/ARANCIO

Fig. 34

FLASHING
GREEN/ORANGE LED

it must be replaced.

– Replace the electronic board.

The gas valve does not modulate in hea­ting and hot water phases.

– The sensor is interrupted, it needs to be

replaced.

– The winding of the modulator is interrup-

ted.

– Check that the electricity to the modula-

tor is in compliance with the specifica­tions.

– Substitute the panel as it is faulty.

In the exchanger of the boiler there are
noises and sparking.

– Check that the circulator is not blocked,

eventually unblock it.

– Remove impurities and sediment that

have accumulated around the rotor of
the circulator.

– The circulator is burnt or the number of

turns is less than that foreseen; it must
be replaced.

– Check that the power to the boiler is

adequate to the actual necessities of the
heating system.

The safety valve of the boiler frequently
intercepts.

– Check that the filling cock is closed. If it

does not close perfectly then replace it.

– Check that the filling pressure when the

system is cold is not too high, keep to
the given values.

– Check whether the safety valve is calibra-

ted, eventually replace it.

– Check whether the capacity of the tank

is enough to hold the quantity of water of
the system.

– Check the pre-loading pressure of the

expansion vessel.

– Replace the expansion vessel if faulty.

The radiators do not heat up in winter.

– The rotary switch is in the summer posi-

tion, put it on the winter position.

– The room stat is regulated too low or

needs to be replaced as it is faulty.

– The electrical connections of the room

stat are not correct.

The principal burner burns badly: flames
too high, yellow flames.

– Check that the gas pressure to the bur-

ner is normal.

– Check that the burners are clean.
– Check that the coaxial duct is correctly

installed (vers. “BF”).

Smell of combusted gas

– Check that the boiler is perfectly clean.
– Check that the suction is suf ficient.
– Check that there is not an excessive.

The boiler is functioning but the tempera­ture is not increasing.

– Check that the consumption of gas is not

below that foreseen.
– Check that the boiler is clean.
– Check that the boiler is proportional to

the system.

In the “BF” versions on request for hot
water or heating the fan does not start.

– Make sure that the smoke pressure

switch is functioning and that the relative

contact is in rest conditions.
– Check and if necessary remove impuri-

ties or condensation from the connec-

ting tubes of the smoke pressure switch.
– It is necessary to replace the smoke

pressure switch.
– Replace the electronic board.

91

92

USER INSTRUCTIONS

WARNINGS

– In case of fault and/or incorrect equipment operation, deactivate it, without making any repairs or taking any direct

action. Contact the authorised technical staff.

– The installation of the boiler and any servicing or maintenance job must be carried out by qualified personnel. Under

no circumstances, the devices sealed by the manufacturer can be tampered with.

– It is absolutely prohibited to block the intake grilles and the aeration opening of the room where the equipment is

installed.

LIGHTING AND OPERATION

BOILER IGNITION (fig. 1)

Open the gas valve and light the appliance
by turning the rotary switch to summer
position

. The green led indicates that
electricity is being supplied to the appliance.
–

With the rotary switch in the summer
position , the boiler will start-up upon
demand for domestic hot water, and run
at full power to reach the selected tempe­rature. The gas feeding pressure will then
automatically vary to ensure that the
required temperature is kept constant.

– With the rotary switch in the winter posi-

tion , once the boiler has reached the
value set on the heating potentiometer, it
will start to modulate in automatically in

order to supply the required power out­put to the system.
The operation of the boiler will be stop­ped through the intervention of the ther­mostat or timer.

TEMPERATURES ADJUSTMENT (fig. 2)

– The D.H.W. temperature can be adju-

sted by turning the knob of the D.H.W.
potentiometer which has a range of
between 40 to 60°C (fig. 2).

– The C.H. temperature can be adjusted by

turning the knob of the C.H. potentiome­ter which has a range of between 40
to 80°C. To ensure optimal boiler ef fi-

ciency at all times, we recommend not to
drop below a minimum working tempera­ture of 50°C.

TURNING THE BOILER OFF (fig. 1)

To turn the boiler off place the rotary switch
on the OFF position. If the boiler is not going
to be used for a lengthy period it is advised
to turn of f the electricity supply, close the
gas cock, and if low temperatures are fore­seen, empty the boiler and the hydraulic
system to avoid breakage in the tubes due
to the freezing of the water.

GAS CONVERSION

Should it be necessar y to convert the
appliance to a different gas from the one
for which the boiler has been equipped,
approach the technical staff.

CLEANING AND MAINTENANCE

Preventive maintenance and checking of
the efficient operation of the equipment
and safety devices must be carried out
exclusively by the authorized technical
staff. The boiler is supplied with an elec­tric cable. Should this require replace­ment, contact exclusively an authorised
technical staff.

APRE

0

306090

120

bar

°C

034

1

Fig. 1

Fig. 2

OPEN

FAULT FINDING

– Ignition failure/safety stat intercep-

tion (fig. 3)

If the burner fails to start the red led
that signals blockage will light up. To
attempt star ting it again, the rotary swit­ch must be turned to the position ( )
and released soon af ter, returning to the
summer

()

or winter

()

position.

If the failure should occur again, call
the authorised technical staff to check
the boiler.

– Insufficient water pressure (fig. 4)

In case the index of the thermomanome­ter is below scale of the blue colour (2)
the boiler is not functioning and the oran­ge bicolour detector is flashing. To resto­re functioning act on the filling cock
taking the index of the manometer within
the scale of the blue colour (2).
Once filled close the filling tap. The blue
coloured scale (1) shows the working
field with heating system functioning.

– Other faults (fig. 5)

In the “25/60 BF - 30/60 BF” versions
in case the green bicolour detector
(fan/pressure switch), deactive the boi­ler and call the authorised technical staf f
for assistance. In case the orange bico­lour detector lights upt (heating sensor
SM failure), deactive the boiler and call
the authorised technical staff for assi­stance.

– Smoke safety device vers. “25/60”

(fig. 6)
If the green bicolour detector is flashing
(fig. 5) the boiler is not functioning.
To restore functioning reinstate the ther­mostat button.

If the failure should occur again, call
the authorised technical staff for assi­stance.

93

SPIA ROSSA

Fig. 4

SCALA

COLORE

AZZURRO

0

30

60

90

120

bar

°C

0

3

4

1

SCALA COLORE BLU

SPIA LAMPEGGIANTE ARANCIO

0

30

60

90

120

bar

°C

0

3

4

1

Fig. 6

Fig. 3

CLOSE

Fig. 5

RED LED

BLU SCALE (2)

BLU

SCALE (1)

FLASHING ORANGE LED

TIME PROGRAMMER (optional)

With the selector in the “AUTO” position,
the boiler operation is regulated according
to the temperatures set for the program­med time periods.
During star t-up, the second selector must
be in the “RUN” position. Programming:

– Setting the time (fig. 7)

Move the selector to “”. To change the
hour on the display, press the “h” button,
to change the minutes, press the “m”
button.
To set the day, press button “1...7” until
the arrow points to the correct day (1 =

Monday ....... 7 = Sunday).

– Setting the programme (fig. 8)

The programmer has 8 start-up pro­grammes and 8 shutdown options.
To make programming easier, 3 star t-up
and 3 shutdown programmes have
already been set up for each day of the
week, as follows:

NOTE:Programmes from 7 to 16 are not
pre-set.

To select programmes other than those
pre-set, move the selector to the “P”
position: “0:00 1” will appear on the
display: the first three figures indicate
the hour and minutes, the fourth figure is
the number of the programme.
Programmes with odd numbers are swit­ch-on times (daytime temperature) and
are indicated on the display by a light bulb
symbol. Programmes with even numbers
indicate the temperature reduction
(night).
Use button “1...7” to select the day of the
week (from 1 to 7), or the period (1 ÷ 5,
6 - 7; 1 ÷ 6; or every day if the program­me has to be repeated every day of the
week). Set the hour and minutes using
buttons “h” and “m”.
The operation in memorized by pressing
button “P”

The display then changes to the further
programme. Repeat the same opera­tions to set the successive programmes.
At the end of the programming. Move the
selector to the “RUN” position.

– Cancelling one or more

programmes (fig. 9)
The programmed switch-on time and
switch-off time must be cancelled for
each individual programme by moving
selector (2) to the “P” position.
Select the required programme with but­ton (3), press button (4) to cancel the
settings for that day (the triangular day
indicator should disappear).
If a par t of the programme is cancelled,
when selector (2) is returned to the
“RUN” position, an error message will

appear on the clock display together with
an indication of the incorrect program­me. To cancel all the programmes, move
the selector to the “P” position and press
buttons (3) and (5) simultaneously.

– Setting the “SKIP” function (fig 9)

The SKIP function defused the program­mes when going out for the day, during
which no heating is required.
To start this function, press button (7);
the button is only active when selector (2)
is in the “RUN” position.

Once selected, the SKIP function beco­mes active at 0:00 of the following day
and lasts for 24 hours.
Once activated, it cannot be defused.
Consequently the normal programme
will only be resumed after 24 hours.

94

KEY
1 Manual/automatic operation selector
2 Programmer/timer setting selector
3 Programme button
4 Day button
5 Hour button
6 Minute button
7 SKIP function button
8 Reset button

Fig. 8

Fig. 9

Programa Hora de Hora de

encendido apagado
1 06,00 ­2 - 09,00
3 12,00 ­4 - 14,00
5 18,00 ­6 - 22,00

Fig. 7