Baxi Nuvola 3 Comfort Operating And Installation Instructions Download Page 35

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C607215 - GB

INSTRUCTIONS FOR FITTERS

30. FUNCTIONAL CIRCUIT DIAGRAM

1 boiler

2 boiler probe

3 DHW exchanger

4 Expansion vessel

5 Boiler drain tap

6 Central heating NTC sensor

7 Safety thermostat

8 Ignition electrode

9 Water-fumes exchanger

10 fumes hood

11 fumes thermostat

12 flame detection electrode

13 Gas train with injectors

14 safety valve on heating circuit 3 bar

15 differential hydraulic pressure switch

16 automatic air vent

DHW outlet

DHW inlet

Heating return

Heating delivery

Gas

17 pump with air separator

18 Gas valve

19 heating return filter

20 automatic by-pass

21 gas tap

22 Pressure gauge

23 Burner

24 Three-way valve

25 Three-way valve motor

26 Boiler filling tap

27 safety valve on DHW circuit 8 bar

28 storage boiler drain tap

29 flow adjuster

30 water supply tap

240 i - 280 i

Figure 19

0702_1204 / C

G_1884

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Summary of Contents for Nuvola 3 Comfort

Page 1: ...High performance gas fired wall mounted boiler operating and installation instructions GB ...

Page 2: ... 12 Instructions prior to installation 14 13 Installing the boiler 15 14 Dimensions of boiler 15 15 Contents of pack 16 16 Installation of flue and air ducts 16 17 Connecting the mains supply 20 18 Installing the climate controller 21 19 Gas conversion methods 23 20 Visualisation of electronic board parameters on boiler display info function 25 21 Parameters setting 27 22 Adjustment and safety dev...

Page 3: ...on acid and non alkaline Recommended cleaning products are SENTINEL X300 or X400 and FERNOX Regenerator for heating circuits Use these products in strict compliance with the manufacturers instructions 2 2 existing plant Before installing the boiler drain the system and clean it to remove sludge and contaminants using suitable proprietary products as described in section 2 1 To avoid damaging metal...

Page 4: ... Winter Heating only Off enable DHW temperature adjustment Information and Programming Timer Ambient temperature adjustment Confirm Programmed operating mode setting Heating Manual Automatic Off Economy Comfort Daily programming histogram Operating mode at comfort temperature Operating mode at economy temperature Communication in progress between board and remote control Flame modulation level boi...

Page 5: ... two symbols In this mode only the ambient frost protection function is enabled any other request for DHW or heating is not satisfied 3 2 DESCRIPTION OF BUTTON Summer Winter Heating only Off Press this button to set one of the following heating functions AUTOMATIC MANUAL OFF as described below AUTOMATIC symbol displayed This function enables hourly boiler programming in the heating mode Heat deman...

Page 6: ... in the boiler press to adjust the delivery temperature of the heating system water The temperature displayed is the ambient temperature DATE TIME SETTINGS Press IP the display shows PROG for a few seconds and the hour starts flashing NOTE if no button is pressed the function automatically stops after about 1 minute 3 5 PROGRAMMING PROG Press to adjust the hours Press OK Press to adjust the minute...

Page 7: ...from point 4 onwards to set the remaining three time bands 11 press IP to exit the function 0608_2802 FACTORY SETTINGS On 1 Of 1 On 2 Of 2 On 3 Of 3 On 4 Of 4 MONDY DAY 1 Monday 06 00 08 00 11 00 13 00 17 00 23 00 24 00 24 00 TUEDY DAY 2 Tuesday WEDDY DAY 3 Wednesday THUDY DAY 4 Thursday FRIDY DAY 5 Friday SATDY DAY 6 Saturday SUNDY DAY 7 Sunday 0802_2501 NOTE If switching on time on is set at the...

Page 8: ... and then 2 a GROUP of days by pressing 3 Press OK 4 repeat the operations from points 4 to 10 of section 3 6 1 3 7 HOURLY PROGRAMMING DOMESTIC HOT WATER MODE This function allows you to programme 4 boiler time bands in the DHW mode during the week the programmed time bands are identical for every day of the week To set hourly programming in the DHW mode proceed as follows 1 press IP and then to a...

Page 9: ...mbient temperature press or see section 4 3 This function can be manual or auto matic as de scribed below AUTOMATIC OPERATION symbol on display The ambient temperature setting depends on the time band section 3 6 The ambient temperature is set to COMFORT inside the time band while it is set to ECONOMY outside the time band Press to temporarily change ambient temperature from COMFORT to ECONOMY and...

Page 10: ...lue proceed as follows Press IP to enable the PROG function press to scroll the functions to modify as described in the following table Function Display Description of function COMFR The set temperature flashes factory value 20 C Boiler in heating mode at rated temperature ECONM The set temperature flashes factory value 18 C Boiler in heating mode at reduced temperature NOFRS The set temperature f...

Page 11: ... MANUAL MODE PARTY This function is used to set a temporary ambient temperature After this period the operating mode returns to the previously set one To enable the function proceed as follows press and set the MAN function symbol press MM 60 appears on the display and the symbols flash the duration of the function is adjusted as described in section 4 4 1 to modify the ambient temperature press O...

Page 12: ...thorised Service Engineer Do not drain the whole system as filling up with water again causes unnecessary and harmful scale to build up inside the boiler and the heating elements If the boiler is not used during winter and is therefore exposed to the danger of frost add some specific anti freeze to the water in the system e g propylene glycol coupled with corrosion and scale inhibitors The electro...

Page 13: ...W sensor fault Tripping of safety thermostat for system at low temperature if connected Lack of consent from hydraulic differential pressure switch Hydraulic differential pressure switch contact faulty Safety intervention for no water circulation Communication error between electronic board and climate controller Parasite flame flamer error Climate controller internal error Board internal error Bo...

Page 14: ...able proprietary products To avoid damaging metal plastic and rubber parts only use neutral cleaners i e non acid and non alkaline Recommended cleaning products are SENTINEL X300 or X400 and FERNOX Regenerator for heating circuits Use these products in strict compliance with the manufacturers instructions 2 2 existing plant Before installing the boiler drain the system and clean it to remove sludg...

Page 15: ...ing After fixing the boiler to the template connect the flue and air ducts supplied as accessories as described in the following sections If installing the boiler with natural draught models 240 i 280 i make the connection to the flue using a metal pipe which over time will resist normal mechanical stress heat and the action of the combustion products and any condensate they form 14 Dimensions of ...

Page 16: ...al bend allows the boiler to be connected to a flue air duct in any direction as it can be rotated by 360 It can also be used as a supplementary bend combined with a coaxial duct or a 45 bend WARNING To optimise operating safety make sure the flue ducts are firmly fixed to the wall with suitable brackets 911231_5500 Figure 7 2 1 MAX INLET LENGTH DIAPHRAGM A m mm 0 2 5 73 2 5 5 NO 0 0 5 73 0 5 2 80...

Page 17: ...max 7 m Ø 80 125 mm L max 3 m L max 4 m 140 Fi L max 2 m 320 Fi L max 7 m Ø 80 125 mm 16 2 LAS FLUE DUCT INSTALLATION OPTIONS 0607_0601 L max 4 m L max 5 m 140 Fi L max 3 m 320 Fi L max 8 m Ø 80 125 mm 16 3 VERTICAL FLUE INSTALLATION OPTIONS This type of installation can be carried out on either a flat or a pitched roof by fitting a flue terminal and a special weathering surround with sleeve both ...

Page 18: ...eters After turning the air intake connecter which can be mounted both to the right and the left of the exhaust flue duct suitably adjust the excess air according to the total length of the combu stion exhaust and inlet flue ducts 0802_2504 CG_2022 0812_1905 0604_2001 nuvola 140 Fi NOTE The first 90 bend is not included when calculating the maximum available length The 90 bend allows the boiler to...

Page 19: ...ler L1 L2 max 30 m L1 L2 max 25 m for model 320 Fi 911231_4805 L max 10 m 911231_4806 NB For the C52 type do not fit the flue and air duct terminals on opposite walls of the building The air duct for horizontal discharges must have a maximum length of 10 metres 6m for model 140 Fi If the discharge duct is longer than 6 metres install the condensate collection kit supplied as an accessory near the ...

Page 20: ...H05 VV F 3x0 75mm2 cable with a maximum diameter of 8 mm Access to the power supply terminal block disconnect the boiler from the mains power supply using the two pole switch remove the two screws fixing the control panel to the boiler rotate the control panel remove the cover and access the wiring area figure 11 The 2A fast blowing fuse is incorporated in the power supply terminal block to check ...

Page 21: ...ure C 4 Push the climate controller into the relative housing on the control strip of the front panel without applying excessive force 0706_0501 56_8836 0606_0504 Figure A Figure B Figure C To connect the climate controller proceed as follows Prise open the climate controller there are no screws with your hands Connect the two wires from the M2 terminal block on the boiler figure 11 as illustrated...

Page 22: ...t manual forcing In this case the display of the climate controller shows the flashing symbol Manual operation ends at the next time band when heat is not requested in heating IMPORTANT After installing the climate controller power the appliance and make sure the former works correctly To mount the climate controller on the wall proceed as follows 1 Unscrew the two screws a b figure 11 that fix th...

Page 23: ...the gas valve adjustment outlet Pc and the pressure gauge The same measurement can be made by con necting the pressure gauge to the pressure test point Pb after removing the front panel of the sealed chamber Measuring burner pressure using methods other than those described could lead to incorrect results as the low pressure created by the fan in the sealed chamber would not be taken into account ...

Page 24: ... kg h Reduced power 1 26 m3 h 0 94 kg h 0 92 kg h 1 26 m3 h 0 94 kg h 0 92 kg h p c i 34 02 MJ m3 45 60 MJ kg 46 30 MJ kg 34 02 MJ m3 45 60 MJ kg 46 30 MJ kg Table 2 140 Fi gas type G20 G31 diameter of nozzles mm 1 18 0 77 Burner pressure mbar 1 8 4 2 REDUCED HEAT OUTPUT Burner pressure mbar 8 5 18 8 RATED HEAT OUTPUT N nozzles 10 1 mbar 10 197 mm H2 O Table 1 240 Fi 280 Fi Consumption 15 C 1013 m...

Page 25: ...delivery water HW S Set point of DHW circuit water Value settable with the keys HW MX Maximum DHW circuit water setpoint max settable value HW MN Minimum DHW circuit water setpoint min settable value ADVANCED INFORMATION PWR Flame power level modulation in P BAR Heating circuit water pressure in bar F L M Water flow leaving DHW circuit in litres min PARAMETER SETTINGS K REG Adjustment constant 0 5...

Page 26: ...the climate controller to command one or more external conditioning devices e g air conditioners in summer The boiler relay board therefore enables the external conditioning system when ambient temperature exceeds the temperature value set on the climate controller During an operating request in this mode flashes on the display For relay board connections see the SERVICE instructions 20 2 ADDITION...

Page 27: ...ructions F06 Configuration of external probe inlet See SERVICE Instructions 00 F07 F09 Manufacturer s information 00 Mode of installing the climate controller F10 00 on the wall paragraph 18 2 00 01 Not used 02 in the boiler paragraph 18 1 F11 F12 Manufacturer s information 00 F13 Max heating power 0 100 100 F14 Max DHW power 0 100 100 F15 Min heating power 0 100 00 F16 Setting of maximum heating ...

Page 28: ...tronically controlled pump post circulation function lasts 3 minutes F17 section 21 and is enabled in the heating mode if the ambient thermostat causes the burner to go out Post circulation of the DHW circuit pump The pump post circulation which is obtained electronically has a duration of 30 seconds and is activated at the end of operation of the DHW pump Frost protection device heating and DHW s...

Page 29: ...f oxygen O2 or alternatively carbon dioxide CO2 concentration of carbon monoxide CO The temperature of the comburent air must be measured on the test point located on the air intake flue by inserting the measurement sensor by about 3 cm For natural draught boiler models a hole must be made in the exhaust duct at a distance from the boiler equal to twice the internal diameter of the flue The follow...

Page 30: ...80 320 020516_0500 020516_0400 model 140 240 NOTE For models Nuvola 3 240 a larger pump is available that has the same characteristics as the pump fitted on models Nuvola 3 Comfort 280 320 FLOW l h HEAD mH 2 O FLOW l h HEAD mH 2 O Drain the water in the storage boiler as follows close the water inlet tap open a user tap unscrew the ring nut from the relative drain tap figure 14 loosen the nut on t...

Page 31: ...ing the keys If the climate controller has been installed on the wall section 18 2 the regulation of the heating delivery temperature is automatic The electronic management automatically sets the correct climate curve depending on the external temperature and on the ambient temperature found see also chapter 20 1 IMPORTANT the value of the delivery temperature TM depends on the setting of the para...

Page 32: ...32 C607215 GB INSTRUCTIONS FOR FITTERS K REG Curves Chart 3 Tm Delivery temperature Te External temperature 0710_1801 0710_1802 T e C T m C T e C T m C Tm MAX 45 C Tm MAX 85 C ...

Page 33: ...ctory setting chapter 21 Figure 18 28 1 Connection of the relay board supplied as accessory 0812_1906 CG_1840 Figure 17 28 2 Zone Connection The relay board is not included in the standard boiler equipment and is supplied as an accessory Connect the connectors CN6 of the boiler electronic board and of the relay board by means of the FLAT cable provided Connect the terminals 1 2 3 of the connector ...

Page 34: ...uum cleaner to do this check the gas valve is correctly calibrated check the pressure of the heating system check the pressure of the expansion vessel check the fan works correctly make sure the flue and air ducts are unobstructed check for any impurities inside the siphon fitted on certain boilers check the magnesium anode where present for boilers fitted with storage boilers WARNINGS Before comm...

Page 35: ... with injectors 14 safety valve on heating circuit 3 bar 15 differential hydraulic pressure switch 16 automatic air vent DHW outlet DHW inlet Heating return Heating delivery Gas 17 pump with air separator 18 Gas valve 19 heating return filter 20 automatic by pass 21 gas tap 22 Pressure gauge 23 Burner 24 Three way valve 25 Three way valve motor 26 Boiler filling tap 27 safety valve on DHW circuit ...

Page 36: ...ectrode 17 Gas train with injectors 18 safety valve on heating circuit 3 bar 19 differential hydraulic pressure switch 20 automatic air vent 21 pump with air separator 22 gas valve 23 heating return filter 24 automatic by pass 25 gas tap 26 Pressure gauge 27 burner 28 Three way valve 29 Three way valve motor 30 Boiler filling tap 31 safety valve on DHW circuit 8 bar 32 storage boiler drain tap 33 ...

Page 37: ... N Black R Red G V Yellow Green B White V Green 0802_2510 CG_1937 FITTING FOR EXTERNAL PROBE DHW NTC PROBE NTC HEATING PROBE AIR PRESSURE SWITCH FLAME SENSING ELECTRODE SAFETY THERMOSTAT IGNITION ELECTRODE GAS VALVE FAN THREE WAY VALVE PUMP THERMOSTAT POWER SUPPLY POWER SUPPLY TERMINAL BLOCK M1 HYDRAULIC PRESSURE SWITCH ...

Page 38: ...wn N Black R Red G V Yellow Green B White V Green FITTING FOR EXTERNAL PROBE DHW NTC PROBE NTC HEATING PROBE FUMES THERMOSTAT FLAME SENSING ELECTRODE SAFETY THERMOSTAT IGNITION ELECTRODE GAS VALVE FAN THREE WAY VALVE PUMP THERMOSTAT POWER SUPPLY POWER SUPPLY TERMINAL BLOCK M1 HYDRAULIC PRESSURE SWITCH ...

Page 39: ...tput l min 18 2 19 14 1 18 2 19 21 5 Type B11BS B11BS C12 C32 C42 C52 C82 B22 Diameter of concentric flue duct mm 60 60 60 60 Diameter of concentric air duct mm 100 100 100 100 Diameter of 2 pipe flue duct mm 80 80 80 80 Diameter of 2 pipe air duct mm 80 80 80 80 Diameter of flue duct mm 140 140 Max mass flow of fumes kg s 0 022 0 024 0 015 0 018 0 018 0 022 Min mass flow of fumes kg s 0 021 0 021...

Page 40: ...eszti és fenntartja a jogot arra hogy a jelen dokumentációban megadott adatokat bármikor előzetes értesítés nélkül módosítsa a jelen dokumentáció információs jellegű és nem tekinthető harmadik féllel szembeni szerződésnek C607215 Ediz 1 12 08 ...

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