format sime boiler manual
DESCRIPTION
Format Sime boiler manualTRANSCRIPT
CONTENTS
1 DESCRIPTION OF THE BOILER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pag. 67
2 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pag. 71
3 CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pag. 78
4 USE AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . pag. 81
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 earth 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 properly 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.
– Purge the system, bleeding off the air present in the gas pipe by operating the pressure relief valve on the gas
valve inlet.
– The installer must provide the user with instruction in operation of the boiler and safety devices and hand over the
instruction booklet to the user.
FOR
MA
T.Z
IP -
ENG
LIS
H
FONDERIE SIME S.p.A. of Via Garbo 27 - Legnago (VR) - Italy declares that its hot water boilers, which bear the CE mark underGas Directive 90/396/CEE and are fitted with a safety thermostat calibrated to a maximum of 110°C, are not subject to appli-cation of PED Directive 97/23/CEE as they meet the requirements of article 1 paragraph 3.6 of the Directive.
1.1 INTRODUCTION
“FORMAT.zip” boilers are gas-fired thermalappliances for central heating and domestichot water production, designed and manu-factured to satisfy the needs of multipledwelling and modern plant requirements.They comply with the european directives
90/396/CEE, 89/336/CEE, 73/23/CEE,92/42/CEE and with the european specifi-cations EN 297 - EN 483. These appliancescan be fired by natural gas (G20) and LPG(G30 - G31). This booklet provides theinstructions for the following boiler models:– “FORMAT.zip 25 OF - 30 OF” with elec-
tronic ignition and modulation, natural
draught.– “FORMAT.zip 25 BF - 30 BF - 35 BF”
with electronic ignition and modulation,room sealed forced-draught.
The instructions given in this manual areprovided to ensure proper installation andperfect operation of the appliance.
67
1 DESCRIPTION OF THE BOILER
1.2 DIMENSIONS
1.2.1 “FORMAT.zip 25 OF - 30 OF” models
L 125 60335
70
0
198 55 55
22
67
7
R M G E U
= 70
ø D
707070 =
41
Fig. 1
L
70
0
K
110
ø 6
0/
100
165
125335
60
55
22 55
677
70=
R EGM U
70 70 70 =
41
Fig. 1/a
1.2.2 “FORMAT.zip 25 BF - 30 BF - 35 BF” models
CONNECTIONSR 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”
25 BF 30 BF 35 BFL mm 400 450 450K mm 180 205 205
CONNECTIONSR 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”
25 OF 30 OFL mm 400 450D mm 130 150
68
25 OF 30 OF 25 BF 30 BF 35 BF
Heat output
Nominal kW 23,5 28,8 23,4 28,8 31,6
kcal/h 20.200 24.800 20.100 24.800 27.200
Minimum kW 9,4 11,9 9,0 11,5 11,2
kcal/h 8.100 10.200 7.700 9.900 9.600
D.H.W. heat output
Nominal kW 23,5 28,8 23,4 28,8 31,6
Heat input
Nominal kW 25,8 31,6 25,8 31,6 34,8
Minimum kW 10,8 13,5 10,8 13,5 13,5
Water content l 6,6 7,4 7,1 8,0 8,0
Adsorbed power consumption W 105 110 150 160 160
Electrical protection grade IPX4D IPX4D IPX4D IPX4D IPX4D
Maximum water head bar 3 3 3 3 3
Maximum temperature °C 85 85 85 85 85
Expansion vessel
Water content/Preloading pressure l/bar 8/1 8/1 8/1 8/1 8/1
C.H. setting range °C 40÷80 40÷80 40÷80 40÷80 40÷80
D.H.W. setting range °C 30÷60 30÷60 30÷60 30÷60 30÷60
Continuous D.H.W. flow rate ∆t 30°C l/min 11,2 13,8 11,2 13,8 15,1
D.H.W. flow rate (EN 625) l/min 11,0 13,4 10,7 13,4 14,5
Minimum D.H.W. flow rate l/min 2,2 2,2 2,4 2,4 2,4
D.H.W pressure
Minimum bar 0,2 0,5 0,5 0,65 0,80
Maximum bar 7 7 7 7 7
Smokes temperature °C 87/112 89/111 124/147 118/151 119/151
Smokes flow gr/s 18,6/19,7 22,0/23,7 16,1/14,7 19,4/17,1 25,1/19,6
Category II2H3+ II2H3+ II2H3+ II2H3+ II2H3+
Type B11BS B11BS B22 B22 B22
C12-32-42-52-82 C12-32-42-52-82 C12-32-42-52-82
Weight kg 30 33 38 40 40
Main burner nozzle
Quantity n° 12 15 12 14 15
Natural gas (G20) ø mm 1,30 1,30 1,30 1,30 1,30
LPG (G30 - G31) ø mm 0,77 0,76 0,77 0,78 0,80
Gas consumption *
Natural gas (G20) m3st/h 2,73 3,34 2,73 3,34 3,68
Butane (G30) kg/h 2,02 2,48 2,02 2,48 2,74
Propane (G31) kg/h 1,99 2,44 1,99 2,44 2,70
Burner gas pressure
Natural gas (G20) mbar 2,2÷11,1 2,1÷10,5 2,3÷11,8 2,6÷12,7 2,2÷13,7
Butane (G30) mbar 5,0÷27,7 5,4÷27,4 5,9÷28,5 5,5÷28,5 4,5÷28,2
Propane (G31) mbar 6,4÷35,7 7,0÷35,4 7,7÷36,5 7,1÷36,5 5,8÷36,2
Gas supply pressure
Natural gas (G20) mbar 20 20 20 20 20
Butane (G30) mbar 28 - 30 28 - 30 28 - 30 28 - 30 28 - 30
Propane (G31) mbar 37 37 37 37 37
1.3 TECHNICAL FEATURES
* Gas consumption figures express the lowest calorific power of pure gas under standard conditions at 15°C – 1013 mbar; this figure may differ from the actualfigure, which is dependent on gas composition and environmental conditions.
69
1
2
3
4
22
5
7
8
27
11
14
10
9
6
1612
18
2813
192120
17
U E G M R
29
1.4 FUNCTIONAL DIAGRAM
Fig. 2
KEY1 Smoke chamber/Fan (“BF” model)2 Main exchanger3 Combustion chamber4 Gas valve5 D.H.W. plate exchanger6 Divertor valve with charging7 C.H. sensor (SM)8 100°C safety stat9 Air relief valve
10 Pump11 Expansion vessel12 Safety valve13 Boiler discharge14 Water flow switch15 Thermohydrometer16 Automatic by-pass17 D.H.W. filter18 C.H. return cock (optional)19 C.H. flow cock (optional)20 D.H.W. cock (optional)21 Gas cock (optional)22 Fixing jig23 D.H.W. probe (SS)24 Bithermal exchanger25 Water pressure switch26 Filling cock27 Thermometer probe28 Hydrometer29 Aqua Guard
“25 OF - 30 OF” models
“25 BF - 30 BF - 35 BF” models
1
23
3
4
22
1426
17
20 21
13
19 18
12
16
910
15
25
78
2411
U E G M R
70
6
1211
109
8
7
5
4
3
2
1
13
14
19
3
15
1
11
9
1718
16
10
2
12
1.5 MAIN COMPONENTS
Fig. 3
KEY1 Control panel2 Ignition transformer3 Combustion chamber4 Fan5 Combustion analysis intakes6 Negative pressure intake7 Positive pressure intake8 Smoke pressure switch9 C.H. sensor (SM)
10 Main exchanger (vers. “BF”)Bithermal exchanger (vers. “OF”)
11 100°C safety stat12 Gas valve13 Flow water switch14 Divertor valve15 Water pressure switch16 D.H.W. probe (SS)17 Smoke chamber18 Smoke stat19 Aqua Guard
“25 OF - 30 OF” models
“25 BF - 30 BF - 35 BF” models
The boiler must be installed in a fixed loca-tion and only by specialized and qualifiedfirms in compliance with all instructionscontained in this manual. Furthermore, theinstallation must be in accordance with cur-rent standards and regulations.
2.1 VENTILATION OF BOILER ROOM
The “OF” version boilers must be installedin adequately ventilated domestic rooms. Itis essential that in rooms where the boilerare installed at least as much air can arriveas required by normal combustion of thegas consumed by the various appliances.Consequently, it is necessary to make ope-nings in the walls for the air inlet into therooms. These openings must meet the fol-lowing requirements:– have a total free section of at least 6
cm2 for every kW of heat input, with aminimum of 100 cm2;
– They must be located as close as possi-ble to floor level, not prone to obstruc-tion and protected by a grid which doesnot reduce the effective section requiredfor the passage of air.
Models “BF”, with a hermetically sealed com-bustion chamber and air supply circuit,maybe installed in any room in the home.
2.2 INSTALLATION PLATE
The opt ional instal lat ion plate code8075416 is supplied with an instructionsheet for the fixing.
2.2.1 Curve and gas/hot water tap kit
Follow the instructions shown in fig. 4 toassemble the components supplied in optio-nal kit code 8075418.
2.2.2 Fitting isolating valves (optional)
To fit the isolating valves, supplied in kit code8091806, follow the instructions mentio-ned in fig. 4/a.
2.2.3 Replacement wall kit for other makes
For assembly of the optional kit code8093900 refer to the instruction sheetprovided with the kit.
2.3 CONNECTING UP SYSTEM
Wash all system pipes well before hookingthem up with the boiler to eliminate anyresidues which could compromise its func-tioning. The discharge pipe of the safetyvalve must be connected to a collectorfunnel for channelling away any discharge
if the safety valve goes into action. If the heating system is on a higher floorthan the boiler, install the on/off taps sup-plied in kit code 8091806 on the heatingsystem delivery/return pipes. The gas connection must be made usingseamless steel pipe (Mannesmann type),galvanized and with threaded joints providedwith gaskets, excluding three-piece connec-tions, except for initial and end connections.Where the piping has to pass through walls,a suitable insulating sleeve must be provi-ded. When sizing gas piping, from the meterto the boiler, take into account both the volu-me flow rates (consumption) in m3/h andthe relative density of the gas in question.The sections of the piping making up thesystem must be such as to guarantee asupply of gas sufficient to cover the maxi-mum demand, l imit ing pressure lossbetween the gas meter and any apparatusbeing 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 thefront panel; it contains all the technical dataidentifying the boiler and the type of gas forwhich the boiler is arranged.
2.3.1 Filter on the gas pipe
The gas valve is supplied ex factory with aninlet filter, which, however, is not adequateto entrap all the impurities in the gas or ingas main pipes. To prevent malfunctioning of the valve, or incertain cases even to cut out the safetydevice 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 thetap water exchanger, the water suppliedshould have a hardness of no more than20°F. In all cases the water used should betested and adequate treatment devicesshould be installed. To prevent lime scale ordeposits on the primary exchanger, thewater used to supply the heating circuitshould must be treated in accordance withUNI-CTI 8065 standards.It is absolutely essential that the water is tobe 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 partially or totally.
2.5 SYSTEM FILLING (fig. 5)
Filling of the boiler and the system is doneby the charge cock (2). The charge pressu-re, with the system cold, must be between1 and 1.2 bar. During system filling you are recommendedto keep the main switch turned OFF. Fillingmust be done slowly so as to allow any airbubbles to be bled off through the air val-ves. Should the pressure have risen wellabove the limit expected, discharge theover pressure by opening the pressure-relief valve.
71
2 INSTALLATION
KEY1 Fixing jig2 Elbow 1/2”x143 Gasket ø 18.5/11.54 Elbow 3/4” x 185 Gasket ø 24/176 Copper pipe 3/4”x187 Gas cock 3/4” MF8 Hot water tap section 9 D.H.W. inlet tap 1/2” Fig. 4
KEY1 Fixing jig2 Straight coupling 1/2”x143 Gasket ø 18.5/11.54 Elbow 1/2”x145 Copper pipe 1/2”x146 Isolation valve 1/2” MF7 Isolation valve 3/4” MF8 Gasket ø 24/179 Gas cock 3/4” MF
10 Straight coupling 3/4”x1811 Copper pipe 3/4”x1812 Straight coupling
3/4”x18 with olive Fig. 4/a
2.5.1 Emptying the system (fig. 5)
Use the drain tap to empty the system (9).Turn off the boiler before doing this.
2.6 FLUES/CHIMNEYS
The flue or chimney used to release theproducts of combustion into the atmosphe-re must comply with current legislation.
2.6.1 Passing flue pipes through an existing chimney
When renovating or passing flue pipesthrough an existing chimney, use only flueswhich are declared suitable for the purpo-se by the manufacturer, following theinstructions for installation and use provi-ded by the manufacturer.
2.7 INSTALLATION COAXIAL DUCT(vers. “BF”)
The air inlet-smoke outlet assembly ø60/100 is supplied in a kit code 8084811complete with mounting instructions.
With the curve supplied in the kit themaximum horizontal length of the fluemust not exceed 3.4 metres in model “25BF”, 3 metres in models “30 BF - 35 BF”. When the extension code 8086908 isused, the end of the flue must alwayshave a horizontal outlet.
The diagrams in fig. 6 illustrate a number ofexamples of different coaxial outlets.
2.7.1 Coaxial flue diaphragm
The boiler is normally supplied with ø 87.5diaphragm. Insert the diaphragm only if thelength of the coaxial flue.Refer to fig. 7 for positioning.
72
C12
C32
C42
3
1
2
7
64
3
2
min
1,3
m -
max
5 m
8
x
y
x + y = max 3,4 m "25"x + y = max 3,0 m "30-35"
max 3,4 m "25"max 3,0 m "30-35"
KEY1 Coaxial flue kit
code 80848112 a Extension L. 1000
code 80961002 b Extension L. 500 code 80961013 Vertical extension L. 200 code 80869084 Additional 90° curve code 80958006 Articulated tile code 80913007 Roof outlet terminal L. 1284 code 80912008 Vertical condensation collector L. 200 cód. 8092803
Fig. 6
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.– It is advisable to assemble the condensation collector (8) on vertical
segments exceeding 2.5 metres in length and to limit maximumlength to 4 metres.
8
5
7 6
4231 9
Fig. 5
KEY1 D.H.W. inlet/outlet manifold2 Fill tap3 D.H.W. filter4 Manifold by-pass
5 Water rate adjuster6 D.H.W. exchanger7 Microswitches8 Water flow switch9 Boiler discharge
“25 OF - 30 OF” models “25 BF - 30 BF - 35 BF” models
5
8
3 2 9 4
With outlet type C12 - C42, install diaphragm ø 87.5 only if the coaxial flue isless than 1.8 metres long for model “25 BF” or 1.5 metres long for model “30BF - 35 BF”.
With outlet type C32, use the following diaphragms, depending on flue length andwithout any additional curves:
Installations with adapter Installations with condensationcode 8086901 collector code 8092802
Optional Standard Without Standard Nonediaphragm ø 86 diaphragm ø 87,5 diaphragm diaphragm ø 87,5 diaphragm(cód. 6028623)
L min = 1,3 m L min = 2,5 m L min = 4 m L max = 2,5 m L min = 2,5 mL max = 2,5 m L max = 4 m L max = 5 m L max = 4 m
Fig. 7
2.8 INSTALLATION SEPARATE PIPES (“BF” version)
When installing the pipes, follow closely therequirements of the current standards, aswell as the following practical pointers:
– With direct intake from outside, whenthe pipe is longer than 1 m, you arerecommended to insulate the piping soas to prevent formation of dew on theoutside of the piping during particularlyhard periods of the year.
– With the outlet pipe outside the buildingor in cold indoor environments, insulationis necessary to prevent burner failure instarting. In such cases, provide for a condensate-collector system on the piping.
– If a segment of the flue passes through aflammable wall, this segment must beinsulated with a glass wool pipe insulator30 mm thick , with a density of 50kg/m3.
The maximum overall length of the intakeand exhaust ducts depends on the headlosses of the single fittings installed andmust not be greater than 7.60 mm H2Overs. “25 BF”, 10.40 mm H2O vers. “30BF” and 12.0 mm H2O vers. “35 BF”. Forhead losses in the fittings, refer to Table 1.
2.8.1 Separate flue kit (fig. 8)
The separate flue kit code 8089904 is
supplied with an intake diaphragm whichmust be used as shown in fig. 8/a, depen-ding on the maximum load loss permittedin both flues.
73
Example of allowable installation calculation in that the sum of the head losses of the single fit-tings is less than 7.60 mm H2O:
Intake Outlet7 meter horizontal pipe ø 80 x 0.20 1.40 –7 meter vertical pipe ø 80 x 0.30 – 2.10n° 2 90° elbows ø 80 x 0.30 0.60 –n° 2 90° elbows ø 80 x 0.40 – 0.80N° 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 segments from n. 1 to n. 7 from diaphragm in the intake pipe.
16
5
11
016
5
K
ø 8
0
ø 8
0
100
92
1
2
3
46
Fig. 8
Fig. 8/a
KEY1 ø125/95 sponge seal2 Fixing screw3 Flue outlet flange4 Inlet air diaphragm6 Manifold with intakes
25 BF 30 BF 35 BFK mm 180 205 205
TABLE 1
Accessories ø 80 Load loss (mm H2O)
25 BF 30 BF - 35 BF
Intake Outlet Roof out. Intake Release Outlet Roof out.Intake
90° curve MF 0,30 0,40 – 0,30 0,50 –
45° curve MF 0,20 0,30 – 0,20 0,40 –
Extension L. 1000 (horizontal) 0,20 0,30 – 0,20 0,40 –
Extension L. 1000 (vertical) 0,30 0,20 – 0,30 0,30 –
Outlet terminal – 0,30 – – 0,40 –
Intake terminal 0,10 – – 0,10 – –
Manifold 0,20 – – 0,30 – –
Roof outlet terminal L.1390 – – 0,50 – – 0,60
Condensation collection T – 1,00 – – 1,10 –
N° segments Total load loss mm H2Oto remove 25 BF 30 BF 35 BF
none 0 ÷ 0.8 0 ÷ 1.0 -n° 1 0.8 ÷ 1.6 1.0 ÷ 2.0 -
n° 1 e 2 1.6 ÷ 2.4 2.0 ÷ 3.0 0 ÷ 1.0da n° 1 a 3 2.4 ÷ 3.1 3.0 ÷ 4.0 1.0 ÷ 2.0da n° 1 a 4 3.1 ÷ 3.8 4.0 ÷ 5.0 2.0 ÷ 3.0da n° 1 a 5 3.8 ÷ 4.5 5.0 ÷ 5.9 3.0 ÷ 4.0da n° 1 a 6 4.5 ÷ 5.2 5.9 ÷ 6.8 4.0 ÷ 5.0da n° 1 a 7 5.2 ÷ 5.8 6.8 ÷ 7.7 5.0 ÷ 6.0da n° 1 a 8 5.8 ÷ 6.4 7.7 ÷ 8.6 6.0 ÷ 7.0da n° 1 a 9 6.4 ÷ 7.0 8.6 ÷ 9.5 7.0 ÷ 8.0
da n° 1 a 10 - - 8.0 ÷ 10.0without diaphragm 7.0 ÷ 7.6 9.5 ÷ 10.4 10.0 ÷ 12.0
To use the air intake in this type of outletyou must perform the following operations(fig. 9):
– Remove the base of the air intake, usinga tool to cut it off (a);
– Overturn the air intake (b) and replacethe seal (5) with the seal supplied in thekit code 8089904;
– Insert the intake diaphragm supplied inthe kit code 8089904, pushing it in untilit is in contact with the beat.
You can now insert the extension or curvein its housing to complete the intake (youneed not use any seal or sealant).
2.7.2 Outlet systems
The diagrams in fig. 9/a illustrate a num-ber of examples of different types of sepa-rate outlets.
74
max 0,5 m
max
0,5
m
C12
1
4
9
C52
C32
C42
3
2
11
10
C82
6
5
6
12
3
11
10
3
7
1
8
3
1
3
2
3
3 2
1
3
23 63
1
8 3KEY
1 Separate flue kit code 80899042a 90° elbow MF (n° 6) code 80774102b Isolated 90° elbows MF code 80774083a Extension L. 1000 (n° 6) code 80960033b Insulated extension L. 1000 code 80773063c Extension L. 500 (n° 6) code 80960024 Intake terminal code 80895015 Int.-est. ring kit code 80915006 Intake terminal code 80895007 45° elbow MF (n° 6) code 80774118 Condensation outlet L. 135 code 80928009 Doubler fitting code 8091400
10 Tile with articulated joint code 809130011 Roof outlet terminal L. 1390 code 809120112 Tee condensation outlet code 8093300
Fig. 9
Fig. 9/a
a
b
5
IMPORTANT: In type C52 the outlet and inlet flues must not come out on opposite walls.
IMPORTANT: The three housingson the diaphragm permit assem-bly of the air intake in one posi-tion only.
2.9 FORCED EXHAUST (Type B22)
Comply with the following requirementsduring installation:– Insulate the exhaust pipe and install a
condensation collection system at thebase of the vertical pipe.
– If the pipe passes through combustiblewalls, insulate the section of the flue pipepassing through the wall with a 30 mmthick fibreglass pipe covering with a den-sity of 50 kg/m3.
In “BF” models this type of exhaust pipe isinstalled using the special kit, code8089904. For kit assembly instructions,refer to point 2.9.1. Protect the intake withthe optional accessory, code 8089501. Theaccessory is assembled by cutting a 50 mmlong segment from an ordinary ø 80 exten-sion and inserting it on the air intake, onwhich the accessory is then fitted, anchoredto the pipe segment with the screws provi-ded (fig. 10). Kit code 8089904 is suppliedwith the intake diaphragm, which must beused as shown in fig. 8/a, depending on themaximum permitted flow. Maximum flowresistance must be no more than 7.6 mmH2O in vers. “25 BF”, 10.4 mm H2O in vers.“30 BF” and 12.0 mm H2O in vers. “35 BF”.As the maximum pipe length is determinedby adding up the flow resistance of thevarious individual accessories installed, referto Table 1 for calculation.
2.10 POSITIONING OF OUTLETTERMINALS
The outlet terminals for forced draught
systems may be located on the outer wallsof the building. Table 2 shows approximate,non-binding minimum distances to be metfor a building of the type shown in fig. 11.
2.11 ELECTRICAL WIRING
If you must replace the electric powercable supplied with the boiler, order it exclu-sively from Sime.The power supply must be single-phase230V - 50 Hz through a main switch pro-
tected by a fuse with a distance of at least3 mm between contacts.
NOTE: The boiler must be connected withan efficient grounding system. SIME shallnot be held liable for injury or damageresulting from failure to ground the boiler.
2.11.1 Electrical panel (fig. 12)
Disconnect the electric power supply beforeperforming any work. Remove the three
75
TABLE 2
Siting of terminal Appliances from 7 to 35 kW(distances in mm)
A - below openable window 600B - below ventilation opening 600C - below eaves 300D - below balcony (1) 300E - from adjacent window 400F - from adjacent ventilation opening 600G - from horizontal or vertical soil or drain pipes (2) 300H - from corner of building 300I - from recess in building 300L - from ground level or other treadable surface 2500M - between two terminals set vertically 1500N - between two terminals set horizontally 1000O - from a surface facing without
openings or terminals 2000P - as above but with openings and terminals 3000
1) Terminals below a practicable balcony must be located in such a waythat the total path of the smoke from its outlet point from the termi-nal 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 theaction of the combustion products are present in the vicinity, e.g.,eaves, gutters and downspouts painted or made of plastic mate-rial, projecting timberwork, etc., distances of not less than 1500mm must be adopted, unless adequate shielding is provided toguard these materials. Fig. 11
50
cod. 8089501
Fig. 10
screws (9) locking the control panel in placeand pull the panel forward until it can be tilteddownward. To access the components of theelectrical panel, unscrew the four screws hol-ding the protective guard in place (6).
2.11.2 Room stat connection (fig. 12)
To gain access to connector “TA”, removethe control panel cover (7) and connect theroom stat to the terminals 10-11 after
having removed the jumper. The thermostat or timer-thermostat,recommended for better room tempera-ture control, must be class II as specifiedby standard EN 60730.1 (clean contact).
76
4
1 2 3
56 7
8
9
Fig. 12
KEY1 Thermohydrometer2 Time programmer seat3 Rotary switch4 Main PCB5 Earth faston6 Control panel protection7 Cover (TA)8 Connector (TA)9 Fixing screw
ATTENTION: After having removed the three screws, take outthe panel to tilt it downward.
77
KEYF1 Fuse (1.6 AT)TR Transformer 230/24VPI C.H. pumpEV1-2 Gas valve coilV FanPF Smoke pressure switchVP Divertor valveM Modulator
C Rotay switchSM C.H. sensorSS D.H.W. probeTA Room statEAR Ignition/detection electrodeTRA Ignition transformerTS 100°C safety statPA Water pressure switch
FL FlowmeterTF Smokes statOP Time programmer
Nota: The room stat or the chronothermo-stat must be connected to terminals 10-11 of the “TA” connector after havingremoved the bridge.
Fig. 13
2.11.3 Wiring diagram
“25 BF - 30 BF - 35 BF” models
“25 OF - 30 OF” models
CONNECTOR SPARE PART CODES:J2 code 6278673AJ3 code 6278679J5 code 6278681J6 code 6278678
J10 code 6278680J11 code 6278682
CONNECTOR SPAREPART CODES:
J2 code 6278673AJ3 code 6278672J5 code 6278675J6 code 6278671
J10 code 6278674
3.1 ELECTRONIC BOARD
The electronic boards are manufactured incompliance with the EEC 73/23 low-voltagedirectives. They are supplied with 230V and, through abuilt-in transformer, send a voltage of 24Vto the following components: modulator,D.H.W./C.H. sensors, room stat, waterflowmeter and time programmer. An automatic and continuous modulationsystem enables the boiler to adjust the heatoutput to the various system requirementsor the User’s needs. The electronic components are guaran-teed against a temperature range of 0°to +60°C.
3.1.1 Fault finding
The indicator leds signalling irregularand/or incorrect operation of the equip-ment are indicated in fig. 14.
3.1.2 Devices
The electronic board is equipped with thefollowing devices (fig. 15):
– “POT. RISC.” trimmer (1)Sets the maximum heating power value.To increase the value turn the trimmerclockwise; to reduce the value turn thetrimmer anticlockwise.
– “POT. ACC.” trimmer (6)Trimmer to vary the pressure level uponignition (STEP), of the gas valve. According to the type of gas for whichthe boiler is equipped, the trimmer mustbe regulated so as to obtain a pressureof approx. 3 mbar at the burner formethane gas and 8 mbar for LPG. To increase pressure, turn the trimmerclockwise; to reduce pressure, turn thetrimmer counterclockwise. The slow ignition pressure level can beset during the first 10 seconds followingburner ignition.
After setting the pressure level uponignition (STEP) according to the type ofgas, check that the pressure for hea-ting is still at the value previously set.
– Connector “METANO-GPL” (4)With the connector disconnected, theboiler is ready to function with METHANE;with the connector connected with GPL.
– “ANN. RIT.” connector (5)In the heating phase, the electronicboard is programmed to include a bur-ner technical delay interval of approx.
78
3 CHARACTERISTICS
Fig. 15
1
7
32 4
5
10
9
8
6
1 6
KEY1 “Heat output” trimmer2 Fuse (F 1,6A)3 D.H.W. potentiometer4 Connector “METHANE/GPL”
5 Connector “Delay cancellation”6 “Ignition power” trimmer7 Block red led8 C.H. potentiometer9 Bi-colour led gree/orange
10 Connector “TA”
NOTE: To have access to the regula-ting trimmers (1) and (6) take off theC.H. potentiometer knob.
Fig. 14
Bi-colour green led off if power is cut-off.
Bi-colour orange led: C.H. sensor (SM) fault.
Green led flashing: fan/smoke pressure switch/smokes stat failure.
Red led on, ignition blocked/safety stat tripped: turn the rotary switch in the position ( )
to restore functioning
90 seconds, which occurs both atsystem cold starting and at subse-quent re-ignitions. The aim is to overcome the problem ofrepeated ignitions and turning off withvery short time intervals between. This could occur in particular in systemspresenting high head losses. At each restart after the period of slowignition, the boiler will set itself for about1 minute at the minimum modulationpressure, and will then move to the hea-ting pressure value set. When the connecting link is inserted,both the programmed technical pauseand the period of operation at minimumpressure in the startup phase will becancelled. In this case, the times elapsing betweenturning off and subsequent re-ignition willdepend on a temperature difference of5°C detected by the C.H. sensor (SM).
ATTENTION: It is essential that the operations descri-bed above be carried out by authorizedtechnical staff.
3.2 TEMPERATURE SENSOR
3.2.1 Model “BF”
The boiler is equipped with sensor for detec-ting heating temperature. The sensor acts as a limit stat, switching-offthe burner when the temperature measu-red is higher than 85°C; the reset tempe-rature is set at 80°C. When sensor has tripped, the boiler willnot function for either service.
Table 3 shows the resistance values (Ω)that are obtained on the sensor as thetemperature varies.
3.2.2 Model “OF”
Table 3 gives resistance values (Ω) obtai-ned with the heating and hot water probeswhen the temperature changes.
If the heating probe (SM) is off, the boi-ler does not work for either heating orhot water. If the hot water probe (SS) isoff, the boiler works for either heatingor hot water but does not modulate inD.H.W. mode.
3.3 ELECTRONIC IGNITION
Ignition and flame detection is controlled byan electrode located on the burner. Theseguarantee maximum safety with interven-tion times, for accidental switching off orgas failure, of within one second.
3.3.1 Operating cycle
Rotate the rotary switch to summer or win-ter, the red led should light up. Burner ignition normally takes place within10 seconds. However, it is possible for igni-tion failures to occur, with consequent acti-vation of signal indicating that the controlbox has “locked out”.– Gas failure
The control box runs through the cyclenormally sending electric power to theignition electrode. The electrode conti-nues spark discharge for a maximum of10 sec. If the burner does not ignite, thecontrol box “locks out”.This may occur upon first ignition orafter long periods of boiler lay-off whenthere is air in the pipes. It may be causedby the gas cock being closed or by one ofthe valve coils having a break in the win-ding, so that the valve cannot open.
– Ignition electrode fails to sparkIn the boiler, only the gas to the burner isseen to open. After 10 sec. the controlbox “locks out”.This may be due to a break in the wire ofthe electrode or to the wire not properlyfastened to the electric terminal of theignition transformer. The electrode is earthed or very wormand needs to be substituted.The controlbox is defective.
When there is a sudden voltage failure, theburner shuts out immediately; when powersupply returns, the boiler will start up againautomatically.
3.4 “OF” SMOKE SAFETY DEVICE
It is a safety measure against the outflow of
smoke into the environment due to ineffi-ciency or a partial clogging up of the flue (18fig. 3). It acts by blocking the gas valve whenthe release of smoke into the environmentis continuous and in such a quantity as to bedangerous. To restart the boiler, and reactivate the but-ton of the thermostat. If the blockage occurs repeatedly a thorou-gh control of the flue will be necessary,making all the modifications and taking allthe precautions necessary in order for it tobe efficient.
3.5 “25 BF - 30 BF - 35 BF” SMOKE PRESSURE SWITCH
The pressure switch (8 fig. 3) with fixed set-tings 9.5-14.4 mm H2O (4.6-5.6 mm H2O invers. “35”) is able to guarantee the boileroperation even with air intake and smokeoutlet pipes at the maximum limit of thelength allowed (fig. 16).
3.6 “OF” WATER PRESSURE SWITCH
The water pressure switch (15 fig. 3) istripped, stopping the burner, if the pressu-re in the boiler is lower than 0.6 bar. To restore burner functioning, restorepressure in the system to a value between1-1.2 bar.
3.7 FLOW SWITCH WATER
In model “OF” the flow switch (8 fig. 5) istripped, stopping the burner, when nowater is detected in the hot water circuit.
In model “BF”, on the other hand, it is trip-ped and stops the burner when it doesnot detect water in the primary circuit (>400 l/h).To restore burner functioning, checksystem pressure and the functioning of thepump and the flow switch, and the cleaningof the “Aqua Guard” filter.
79
TABLE 3
Temperature (°C) Resistance (Ω)20 12.09030 8.31340 5.82850 4.16160 3.02170 2.22980 1.669
Fig. 16
3.8 HEAD AVAILABLE TO SYSTEM
Residual head for the heating system isshown as a function of rate of flow in thegraph in fig. 17.
3.9 ELECTRICAL WIRING OF ZONE HEATING SYSTEMS
When installing a system of this type, use aseparate electrical line to which room ther-mostats with their local valves or pumpswill be connected. Connect micro switches or relay contactson terminals 10-11 of the “TA” connector ofthe electronic card after removing the exi-sting jumper (fig. 18).
80
L
N
TA TA1
VZ R VZ1 R1
NOTA: I relé vengono impiegati solo nel casole valvole di zona siano prive di micro.
CR1CR
Connettore "TA"
L
N
TA TA1
P R
P1 R1
CIRCUITO CON VALVOLE DI ZONA CIRCUITO CON POMPE DI ZONA
KEYTA-TA1 Zone room statVZ-VZ1 Zone valveR-R1 Zone relayCR-CR1 Relay contact or micro zone valveP-P1 Zone pump
Fig. 18
0 200 1600140012001000800600400
PORTATA (l/h)
PR
EVA
LEN
ZA
RES
IDU
A (m
bar)
500
400
100
200
300
30 - 35
25
Form
at.z
ip
Fig. 17
FLOW RATE (l/h)
RES
IDU
AL
HEA
D (
mba
r)
CIRCUIT WITH ZONE VALVES CIRCUIT WITH ZONE PUMPS
NOTE: Relays are used only if the areavalves have no microswitches.
“TA” connector
4.1 D.H.W. TEMPERATUREADJUSTMENT
The sistem with a potentiometer for adju-sting the temperature of D.H.W. with a set-ting range from 30° to 60°C offers a dou-ble advantage:
1) The boiler adapts perfectly to any type ofD.H.W. system, whether the mixingsystem is a mechanical or a thermostat-controlled type.
2) The thermal output is dosed accordingto the temperature required, whichmeans a considerable saving in fuel.
NOTE: In order to avoid any misunderstan-ding please remember that the value obtai-ned by the product of temperature diffe-rence (in °C) between D.H.W. output andinput into the boiler by the hourly flow ratemeasured on the tap, where hot water isdrawn off (l/h), cannot be higher than theuseful output developed by the boiler.For measurements and checks on flowrate and temperature of D.H.W., use sui-table instruments, taking into considera-tion any heat dispersion along the stretchof piping between the boiler and the mea-suring point.
4.2 ADJUSTMENT OF D.H.W. FLOW RATE
To adjust the D.H.W. flow rate, use the flowrate adjuster (5 fig. 5). Remember that the flow rates and corre-sponding temperatures of use of hot water,given in section 1.3, have been obtained bypositioning the selector of the circulationpump on the maximum value. Should there be any reduction in theD.H.W. flow rate, the filter installed on theinlet to the divertor valve (3 fig. 5) willneed cleaning.
4.3 ADJUSTMENT OF HEAT OUTPUT FOR C.H. MODE
To adjust boiler heat output for heating pur-poses, i.e., modifying the setting made at thefactory which is approximately 16 kW for“25”, 20 kW for “30” and 22 kW for “35”,use a screwdriver to adjust the C.H. heatoutput trimmer (1 fig. 15). To increase working pressure, turn the trim-mer clockwise; to reduce pressure, turn thetrimmer counterclockwise. To facilitate the operations of adjusting heatoutput, see the pressure/heat output dia-grams for natural gas (methane) and buta-ne or propane gas (figg. 19 - 19/a - 19/b).
4.3.1 Measuring gas pressure at nozzles
To measure pressure at the nozzle, con-nect a manometer to the intake down-stream of the gas valve.
81
4 USE AND MAINTENANCE
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)
PR
ESS
ION
E U
GEL
LO m
bar
29,0 (25.000)
12
13
14
2530
35
Fig. 19
Pressure/heat output diagram for natural gas (methane)
25
20
15
10
8,1 (7.000) 11,6 (10.000) 17,4 (15.000) 23,2 (20.000)
POTENZA TERMICA kW (kcal/h)
PR
ESS
ION
E U
GEL
LO m
bar
30
5
29,0 (25.000)
25 30 35
Pressure/heat output diagram for butane gas (G30)
Fig. 19/a
25
20
15
10
8,1 (7.000) 11,6 (10.000) 17,4 (15.000) 23,2 (20.000)
POTENZA TERMICA kW (kcal/h)
PR
ESS
ION
E U
GEL
LO m
bar
30
35
5
29,0 (25.000)
25 30 35
Pressure/heat output diagram for propane gas (G31)
Fig. 19/b
NO
ZZ
LEP
RES
SU
RE
mba
r
HEAT OUTPUT kW (kcal/h)
NO
ZZ
LEP
RES
SU
RE
mba
r
HEAT OUTPUT kW (kcal/h)
NO
ZZ
LEP
RES
SU
RE
mba
r
HEAT OUTPUT kW (kcal/h)
In “BF” models, connect the manometer asshown in figure 20. This connection mustalso be used when checking maximum andminimum gas pressure; refer to the direc-tions provided under point 4.5.1 if you needto correct the settings.
4.4 GAS VALVE
The boilers are equipped standard with theSIT 845 SIMGA/HONEYWELL VK 4105Mgas valve (fig. 21). The gas valve is set at two pressure values:maximum and minimum. According to the type of gas burnt, thesecorrespond to the values given in Table 4. The gas pressures at the maximum andminimum values, are factory set. Conse-quently they must not be altered. Only when you switch the appliance fromone type of gas supply (methane) toanother (butane or propane), it is permit-ted to alter the operating pressure.
4.5 GAS CONVERSION
This operation must be performed byauthorised personnel using original Simecomponents. To convert from natural gasto LPG or vice versa, perform the followingoperations (fig. 22):– Close the gas cock.– Disassemble the burner manifold (3).– Replace the main nozzles (6) supplied in
a kit, inserting the copper washer (4).Use a ø 7 spanner to perform this ope-ration.
– Remove the “METANO/GPL” connectorlink on the card and set it in the posi-tion corresponding to the gas to beused (4 fig. 15).
– To set the values of maximum and mini-mum gas pressure, follow the instruc-tions given in section 4.5.1.
– After have ultimated the conversion ofthe boiler, please stick onto the casingpanel the plate showing the relevant fee-ding gas which is included into the kit.
NOTE: When reassembling componentswhich you have removed, replace gasseals; test all gas connections afterassembly using soapy water or a productmade specifically for the purpose, beingsure not to use open flame.
4.5.1 Adjusting valve pressure
Set maximum and minimum pressure onSIT 845 SIGMA or HONEYWELL VK4105M valves as follows (fig. 22/a):– Connect the column or a manometer to
the intake downstream of the gas valve. In “BF” models, disconnect the valveVENT pressure test point tube (5 fig. 21).
– Remove the cap (1) from the modulator.– Place the hot tap water potentiometer
knob at the maximum position.
82
1
2
3
4
Fig. 20
KEY1 Pressure inlet downstreamr2 VENT pressure test point3 Sealed chamber4 Manometer
3
4
2
1
5
6
1 2
4 35
SIT 845 SIGMA HONEYWELL VK 4105M
KEY1 Modulator2 EV1-EV2 coils3 Pressure inlet upstream4 Pressure inlet downstream5 VENT pressure test point
TABLE 4
Burner max. pressure Modulator Burner min. pressure Modulator
Type of gas mbar current mbar current
25 OF 30 OF 25 BF 30 BF 35 BF mA 25 OF 30 OF 25 BF 30 BF 35 BF mA
G20 * 11,1 10,5 11,8 12,7 13,7 130 2,2 2,1 2,3 2,6 2,2 0
G30 27,7 27,4 28,5 28,5 28,2 165 5,0 5,4 5,9 5,5 4,5 0
G31 35,7 35,4 36,5 36,5 36,2 165 6,4 7,0 7,7 7,1 5,8 0
(*) Max. burner pressure is guaranteed only when the supply pressure exceeds the max. burnerpressure by at least 3 mbar.
Fig. 21
Fig. 22
KEY1 Swivel connection 1/2”2 Locknut 1/2”3 Burner manifold4 Washer ø 6.15 Burners6 Nozzle M67 Screw
WARNING: To ensure a per-fect seal, always use thewasher (4) supplied in thekit when replacing nozzles,even in burner units forwhich it is not specified.
– Turn on the boiler using the four-wayswitch and turn on a hot water tap allthe way.
– Remember that rotating clockwise willincrease pressure while rotating anti-clockwise will diminish it.
– Adjust maximum pressure using the nut(3) with a wrench (10 for 845 SIGMA, 9for VK4105) to the maximum pressurevalue indicated in Table 4.
– Do not adjust minimum pressure untilyou have adjusted maximum pressure.
– Turn off the supply power to the modula-tor, and keep the hot water tap turnedon.
– Lock the nut (3) in place, turn the screw(2) for 845 SIGMA or the nut (2) using a7 wrench for VK4105 to the minimumpressure indicated in Table 4.
– Turn off the boiler and turn it back onagain several times, keeping the hotwater tap turned on at all times andchecking that the maximum and mini-mum pressure values correspond to theestablished values; correct the settings ifnecessary.
– Adjust, checking that you have restoredthe power to the modulator.
– Put the pipe back on the valve VENTpressure test point.
– Remove the manometer, rememberingto tighten the screw for closing the pres-sure test point.
– Put the plastic cap (1) back on the modu-lator and seal with a drop of colouredsealant if necessary.
4.6 DISMANTLING THE CASING
The casing may be removed completely tofacilitate boiler maintenance, as shown infig. 23.
4.7 CLEANING AND MAINTENANCE
Carry out the cleaning of the generator inthe following way:
– Turn the main switch off to stop electricpower reaching the boiler and close thegas feed cock.
– Remove the outer casing and the gasburner manifold unit . To clean the bur-ner, blow in a jet of air, so as to removeany dust particles that may have accu-mulated.
– Clean the heat exchanger, removing anydust or residue from combustion. Whencleaning the heat exchanger or the bur-ners, chemical products or steel bru-shes MUST NOT BE USED.Make sure that the tops of the burnerswith the holes are free from encrusta-tions.
– Reassemble the items removed fromthe boiler, making sure to follow the cor-rect sequence.
– Check operation of the main burner.
– After assembly of all the gas connec-tions, these must be tested for sound-ness, using soapy water or appropriateproducts. DO NOT USE NAKED FLAMES.
– Do not use calcium chloride to treat theplastic component during generatormaintenance.
4.7.1 Chimney sweep function (fig. 24)
To carry out the verification of combustion
in the boiler turn the selector and stop onthe position ( ) until the green/orange ledstarts to flash intermittently.From that moment the boiler will start func-tioning in heating mode at the maximumpower, with switching off at 80°C andrestarting at 70°C.Before activating the chimney sweep func-tion make sure that the radiator valves oreventual zone valves are open.The test may be carried out also during hot-water service functioning.
83
1
2
Fig. 23
3
2
1
Fig. 22/a
KEY1 Plastic tap2 Minimum pressure adjusting nut3 Maximum pressure adjusting nut
SIT 845 SIGMA HONEYWELL VK 4105M
To do so it is enough, after having activatedthe chimney sweep function, to take somehot water from one or more cocks. Even in this condition the boiler functions atthe maximum temperature always with theprimary controlled between 80°C and 70°C.During the entire duration of the testing thehot water taps must remain open.After verifying the combustion the boilershould be switched off by placing the selec-tor on the OFF position; then return theselector to the desired function.
ATTENTION: After about 15 minutes, oronce the hot water request has been ful-filled, the chimney sweep function auto-matically deactivates.
4.7.2 Cleaning the C.H. water filter“Aqua Guard” (fig. 24/a)
To clean the filter, close the delivery/returnon/off taps, turn off the power to the con-trol panel, remove the casing and empty theboiler using the drain provided (9 fig. 5) untilthe hydrometer shows “zero”. Place a con-tainer for collection underneath the filter,unscrew the cap and proceed to clean thefilter, removing impurities and limestonedeposits. Check the seal o-ring before reas-sembling the cap with the filter.
4.8 FAULT FINDING
The burner does not ignite and the circu-lator is working.– Check that the water pressure reads 1 -
1.2 bar.– The flowmeter is faulty, replace it.– The flow switch has been tripped becau-
se the heating circuit filter “Aqua Guard”is obstructed with impurities; it needscleaning.
Main burner does not start either to drawoff D.H.W. or for heating.– Check flowmeter; if necessary, replace it.
– The smoke stat has tripped; reset it(“OF” vers.).
– Check whether electric power is rea-ching the gas valve actuator; check itsoperation and, if necessary, replace it.
– Check operation of the smoke pressureswitch (“BF” vers.).
– The fan is operating but at low rpm, sofailing to activate the smoke pressureswitch (“BF” vers.); replace the fan.
– Replace the electronic card.
Boiler turns on, but after 10 seconds“locks out”.– Check that during electric wiring the
position of line and neutral have not beeninverted.
– The ignition/sensing electrode is faulty;replace it.
– The control box is faulty; replace it.
Gas valve fails to modulate in D.H.W. andC.H. modes.– The sensor is interrupted; replace it.– The modulator has a break in winding;
replace it.– Check that the current to the modulator
complies with the specifications– The control box is faulty; replace it.
Boiler is noisy or heat exchanger makes asizzling sound.– Check whether circulation pump P is
obstructed; if necessary clear it out.– Unclog impeller of circulation pump, clea-
ring away any impurities or sediments.– Circulation pump is burnt out or has a
lower rpm than required; replace it.– Check boiler output is adequate for
actual needs of heating system.
Boiler safety valve keeps tripping.– Check charge cock is closed. If it doesn’t
close properly, replace it.– Check system cold charge pressure is not
too high; keep to recommended values.– Check whether safety valve is out of cali-
bration; if necessary, replace it.
– Check whether the vessel is sufficientlycapacious to contain the water for thesystem.
– Check preloading pressure of expansionvessel.
– Replace expansion vessel if faulty.
Radiators fail to heat up in winter.– The rotary switch is on “Summer”; swit-
ch to “Winter”.– The room stat is set too low or needs
replacing because faulty.– The electrical connections of the room
stat are wrong.
Main burner burns badly: flames too high,deep yellow.– Check that pressure of burner gas is
regular.– Check burners are clean.– Check coaxial assembly has been instal-
led correctly (“BF” vers.).
Smell of unburnt gases.– Check boiler is properly clean.– Check draught is sufficient.– Check gas consumption is not too high.
Boiler operates but does not increase temp.– Check gas consumption is not lower
than it should be.– Check boiler is clean.– Check boiler is sized in proportion to
system.
In the “BF” boilers, upon demand for D.H.W.or heating, fan fails to turn at max speed.– Make sure that the smoke pressure
switch is working and that the relativecontact is in the rest position.
– Check whether connection tubes ofsmoke pressure switch are obstructedand, if necessary, clean away impuritiesor condensate.
– The smoke pressure switch needsreplacing.
– Replace electronic board.
84
verde/arancio
Fig. 24
FLASHING GREEN/ORANGE LED
Fig. 24/a
BOILER IGNITION (fig. 25)
Open the gas valve and light the applianceby turning the rotary switch to summerposition ( ). The green led indicates that electricity isbeing supplied to the appliance.– With the rotary switch in the summer
position ( ), the boiler will start-upupon demand for domestic hot water,and run at full power to reach the selec-ted temperature. The gas feeding pressure will then auto-matically vary to ensure that the requi-red temperature is kept constant.
– With the rotary switch in the winterposition ( ), once the boiler has rea-ched the value set on the heating poten-tiometer, it will start to modulate in auto-
matically in order to supply the requiredpower output to the system.The operation of the boiler will be stop-ped through the intervention of the roomstat or the chronothermostat.
TEMPERATURESADJUSTMENT (fig. 26)
– The D.H.W. temperature can be adju-sted by turning the knob of the D.H.W.potentiometer which has a range ofbetween 30 to 60°C .
– The C.H. temperature can be adjusted byturning the knob of the C.H. potentiome-ter which has a range of between 40to 80°C.To ensure optimal boiler efficiency at all
times, we recommend not to drop belowa minimum working temperature of 50°C.
TURNING THE BOILER OFF (fig. 25)
To turn the boiler off place the selector knobon the OFF position. If the boiler is not goingto be used for a lengthy period it is advisedto turn off the electricity supply, close thegas cock, and if low temperatures are fore-seen, empty the boiler and the hydraulicsystem to avoid breakage in the tubes dueto the freezing of the water.
GAS CONVERSION
Should it be necessary to convert theappliance to a different gas from the onefor which the boiler has been equipped,approach the technical staff.
CLEANING AND MAINTENANCE
Preventive maintenance and checking ofthe efficient operation of the equipmentand safety devices must be carried outexclusively by the authorized technicalstaff. The boiler is supplied with an elec-tric cable. Should this require replace-ment, contact exclusively with the autho-rized technical staff.
85
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 nearest Authorised Technical Service Centre.
– 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.
– The manufacturer shall not be held liable for any damage caused by improper use of the appliance.
LIGHTING AND OPERATION
Apre
Fig. 25
Fig. 26
OPEN
FAULTS FINDING
– Ignition failure/safety stat interception (fig. 27)If the burner fails to start the red ledthat signals blockage will light up.To attempt starting it again, the selectorknob must be turned to the position ( )and released soon after, returning to thesummer ( ) or winter ( ) position.If the failure should occur again, callthe authorised technical staff to checkthe boiler.
– The burner does not ignite (fig. 27/a)If the problem is due to insufficient watercirculation in the system for the inter-vention of the fluxostat, the hydrometercould point to 0 bar.Use the fill cock, to restore functioningact on the filling tap taking the index ofthe hydrometer within the scale of theblue colour (1). Once filled close the filling tap. The blue coloured scale (2) shows theworking field with heating plant functio-ning.If the problem is due to some othercause, contact an authorised technicalassistance personel.
– Other faults (fig. 27/b)In case the green bi-colour led lights(fan/pressure switch/smokes stat),deactive the boiler. To restore functio-ning reinstate the thermostat button(“OF” model). For “BF” models or if thefailure should occour again call theauthorised technical staff for assistance. In case the orange bicolour led lights upt(C.H. sensor SM failure), deactive the boi-ler and call the authorised technical stafffor assistance.
86
Spia rossa
Fig. 27/a
Fig. 27
Fig. 27/b
Apre
Scalacoloreazzurro 0
3060
90
120
bar
°C
0
3
4
1
Scalacoloreblu
IT SPIESREDHEAD
IT CLIMBSBLUE (1)COLOR IT CLIMBS
BLUE (2)COLOR
OPEN