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Unical DUA plus BTN 28, Installation And User Instruction Manual

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Unical DUA plus BTN 28 Installation And User Instruction Manual Download Page 15

Installation info

15

fig. 11

fig. 12

600

475

880

120

167

Ø 80

182

®

plus

D UA

2.2.8 - SMOKE EVACUATION

THROUGH TWO  SEPARATE
DUCTS Ø 80
(Type B accessories)

NB:

The maximum allowed pressure
drop, according to the installation
type, must be equal to the value
indicated in the installation
examples given on page 17.

For installations with smoke
evacuation through separate
ducts, whose pressure drop value
is between 15 Pa and 30 Pa, it is
necessary to fit a diaphragm,
supplied with the boiler, inside the
smoke outlet (see fig. 11).

Diaphragm

Neoprene
gasket

Diaphragm

From 

ΔΔΔΔΔ

P=40 Pa

DIMENSIONS FOR CONNECTION THE AIR INTAKE AND THE FLUE GAS DISCHARGE WITH DUAL DUCTS

Summary of Contents for DUA plus BTN 28

Page 1: ...DUA plus BTN 28 BTFS 28 00333957 1st edition 09 2011 INSTALLATION AND USER INSTRUCTION MANUAL ...

Page 2: ...y incorrect installation or use and or damage and or injury due to non observance of the manufacturer s instructions shall relieve UNICAL from any and all contractual and extracontractual liability To guarantee efficiency and correct functioning of the equipment it is legally binding to service the boiler once a year according to the schedule indicated in the relative section of this manual In the...

Page 3: ...tor N stars based on the quality of water declared EN 13203 1 19 PMW Max pressure D H W system 20 T max Max temperature D H W system C Electrical features 21 Electrical power supply 22 Consumption 23 Protection grade D Countries of destination 24 Direct and indirect country of destination 25 Gas family 26 Supply pressure E Factory setting 27 Adjusted for gas type X 28 Space for national brands CE ...

Page 4: ...cs Ø80 mm pag 16 2 2 9 On site combustion efficiency measurement pag 18 2 2 10 Gas supply line pag 18 2 2 11 Hydraulic connections pag 18 2 2 12 Electrical connections pag 19 2 3 Electrical wirings pag 20 2 3 1 Actual connection diagram pag 20 2 3 2 Jumper position pag 22 2 4 Filling of the heating system pag 23 2 5 Burner adjustment pag 23 2 6 Burner adjustment pag 24 2 7 Adaptation to the use of...

Page 5: ...estrictor set at 12 litres min Unlocking of check valves C H temperature selector 35 85 C D H W temperature selector 35 65 C Main selector Winter Summer Antifreeze Only Heating Minimum outer temperature calibration if an outer sensor is connected Mounting frame with valves for easy hydraulic connections optional Electronic ignition with double electrode Casing painted with epoxypoliester pouders F...

Page 6: ...sor 27 Domestic Hot Water flow restrictor 28 Filter 29 C H safety valve 30 Boiler safety valve M C H flow 3 4 C D H W outlet 1 2 G Gas inlet 3 4 F D C W inlet 1 2 R C H return 3 4 1 Filling system cock 2 Boiler draining valve 3 By pass 4 No return valve 5 Pump 6 Air vent 7 Modulating gas valve 8 Low water pressure switch 9 Ignition electrode 10 Burner injectors 11 Ignition electrode 12 Ionisation ...

Page 7: ...minal load Star number according to Efficiency Directive 92 42 CE Combustion efficiency at 100 of nominal load Combustion efficiency at minimum load Heat losses through the casing min max Maximum net smoke température Ts Ta Massive smoke flow rate min max Air exces lambda CO2 NOx ponderal value according to EN 297 A3 EN 483 NOx class ponderal value according to EN 297 A3 EN 483 Chimney heat losses...

Page 8: ... see if it is in full working order Defects and faults must be eliminated immediately Please note that we can accept no liability whatsoever for loss or injury resulting from unauthorised adjustment or manipulation of the system s control or regulating devices 2 2 INSTALLATION 2 2 1 PACKING Dua plus B is packed and delivered in a strong cardboard box Once the boiler has been unpacked check that it...

Page 9: ...ig to allow the correct positioning of the gas water and C H system connections when the hydraulic system is being laid out and before the boiler is installed This mounting jig must be fixed to the wall chosen for the installation of the boiler using two screws with expanding dowels The lower part of the mounting jig allows the correct marking on the wall of the points where the fittings for the g...

Page 10: ...do not need particular ventilation openings for the combustion air in the room in which they are installed FORCED DRAUGHT OPEN FLUE BOILER TYPE B22 If the DUA PLUSTFS are installed in a room ac cording to the chimney configuration on type B22 the same ventilation requirements established in paragraphs Direct ventilation and Indirect ventilation apply 2 2 5 FLUE GAS DISCHARGE SYSTEM NATURAL DRAUGHT...

Page 11: ...the anomaly on the display After 15 minutes the boiler will be reset automatically It is absolutely forbidden to by pass the smoke thermostat If the boiler cuts off regularly it is necessary to ask a technician for a check of the flue gas exhaust duct This duct may be obstructed or may be unsuitable for the discharge of flue gas into the atmosphere UNICAL refuses all liability for damage caused as...

Page 12: ...1000 From the ground or from another floor L 1800 Between two vertical terminals M 1500 Between two horizontal terminals N 1000 NOTES 1 Terminals below a practicable balcony shall be arranged in such a way as to assure that the total run of smokes from their outlet from terminal up to outlet from balcony external perimeter including the height of protection baluster if any is not less than 2 m 2 D...

Page 13: ...tance between the air intake duct and the flue gas outlet duct must be at least 250 mm and both end sections must be located within a 500 mm square C42 Boiler designed for connection to collective chimneys including two ducts one for the suction of combustion air and the other for the exhaust of the combustion products through coaxial or dual ducts The chimney must comply with relevant applicable ...

Page 14: ...h length between 1 m it is necessary to place inside the fan outlet the diaphragm supplied with the boiler see fig 9 Type C32 The maximum allowed length of the coaxial vertical pipes is 5 meters included the roof terminal for each supplementary bend the maximum allowed length will be reduced by 1 meter For installations with coaxial ducts having a length between 1 5 m it is necessary to place insi...

Page 15: ... equal to the value indicated in the installation examples given on page 17 For installations with smoke evacuation through separate ducts whose pressure drop value is between 15 Pa and 30 Pa it is necessary to fit a diaphragm supplied with the boiler inside the smoke outlet see fig 11 Diaphragm Neoprene gasket Diaphragm From Δ Δ Δ Δ ΔP 40 Pa DIMENSIONS FOR CONNECTION THE AIR INTAKE AND THE FLUE G...

Page 16: ... 16 fig 13 500 _ Hmin 165 mm CONFIGURATIONS FOR SEPARATE PIPES SUCTION AND OUTLET Ø 80 Example N 1 Primary air suction from perimeter wall and flue gas discharge on roof Maximum allowable pressure loss 65 Pa Example N 1 ...

Page 17: ...is 4 Pa for the Ø 80 L 0 5 m horizontal air inlet terminal the pressure loss is 3 Pa Ø 80 L 0 6 m horizontal discharge end section the pressure loss is 5 Pa NB These values refer to discharges through original UNICAL non flexible and smooth ducts In both of the following examples the hypotized compositions of the intake and evacuation ducts are possible because the total pressure loss is lower tha...

Page 18: ...lso includes the following operations and checks Opening of the gas gate valve and venting of the air contained in the piping and boiler proceding appliance by appliance Check with the gate valve of all the appliance DIAGRAM FLOW RATE MANOMETRIC HEAD AVAILABLE FOR C H SYSTEM By Pass CLOSED By Pass OPEN Flow rate l h Q Available Manometric Head m c e 2 2 11 HYDRAULIC CONNECTIONS Before installing t...

Page 19: ...e characteristics of the water it self NOTE With a water whose hardness is higher than 20 f the use of a softner is strongly recommended 60 55 50 45 40 35 0 50 100 150 200 250 300 65 2 2 12 ELECTICAL CONNECTIONS The electrical connections of DUA plus 30 μtank are shown in the clause WIRING DIAGRAMS par 2 3 pag 20 The boiler must be connected to the mains supply at 230 V 50 Hz This connection is to...

Page 20: ...1 2 1 A6 A9 A3 A1 A2 A4 TA 2 EVZ 2 3 ELECTRICAL WIRING 2 3 1 ACTUAL CONNECTION DIAGRAM KEY A1 A8 Utility connectors ROD Ionization electrode connection on the main board Y1 Room thermostat and outer sensor connectors Y2 Voltage connector DK Pressure switch for low water level E RIV Ionization electrode E ACC1 Ignition electrode E ACC2 Ignition electrode MD Modulating coil PR Heating pump PS Sanita...

Page 21: ...l blockY2 and make the connections respecting the position and the colours The female faston of the earthing wire must be introduced on the tab GND 1 L1 phase brown terminal Y2 1 N neutral bleu terminal Y2 2 earth yellow green tab GND1 Room thermostat connection ROOM STAT Get access to the terminal block Y1 Remove the link between terminals 4 5 Insert the room thermostat cable TA through the extra...

Page 22: ...on for a good working keep the jumper in this position T C 0 1 2 3 4 5 6 7 8 9 0 32755 31137 29607 28161 26795 25502 24278 23121 22025 20987 10 20003 19072 18189 17351 16557 15803 15088 14410 13765 13153 20 12571 12019 11493 10994 10519 10067 9636 9227 8837 8466 30 8112 7775 7454 7147 6855 6577 6311 6057 5815 5584 40 5363 5152 4951 4758 4574 4398 4230 4069 3915 3768 50 3627 3491 3362 3238 3119 300...

Page 23: ...e switching on the boiler it is Before switching on the boiler it is Before switching on the boiler it is important to restart the pump as important to restart the pump as important to restart the pump as important to restart the pump as important to restart the pump as f o l l o w s f o l l o w s f o l l o w s f o l l o w s f o l l o w s loosen the protection screw in the centre of the pump motor...

Page 24: ...urner is ON check that the MAXIMUM pressure value corresponds to that indicated on the table NOZZLES PRESSURES Adjust eventually the value rotating the C nut fig 25 by clockwise rotation the gas pressure increases by anticlockwise rotation the gas pressure decreases B Minimum output adjustment Operate the boiler in service mode at minimum output service mode led blinking When the burner is ON chec...

Page 25: ...tem Turn the potentiometer clockwise seen from the front to increase the pressure or anticlockwise to decrease it Note Since the boiler is the modulating type it automatically adapts the thermal power to the features of the heating system By operating potentiometer CH POWER you effectively limit the maximum power of the boiler and hence its pickup capacity Using the pressure thermal power graph fi...

Page 26: ...ng the nut B to increase or unloosing the nut B to decrease the burner pressure check that the burner is functioning properly check that there are no gas leaks tighten and seal the plug A fig 25 of the modulating coil when the conversion is completed fill in the label supplied with the kit with the information required and stick it onto the boiler alongside the data plate for conversion from LPG t...

Page 27: ...mary heat exchanger temperature below 2 C detected by the SR or SS sensors POSSIBLESOLUTION Cut the power supply close the gas valve and call the After Sale Service BOILERSTATUS The boiler is in lockout position SIGNIFICATIONOFTHEERRORCODE Fault on the DHW temperature sensor SS POSSIBLESOLUTION Ascertain that the SS sensor has the right resistance values shown on the table of the resistance values...

Page 28: ...g and Domestic Hot Water production MODE SELECTOR CH ONLY CH DHW ANTIFROST DHW ONLY D H W TEMPERATURE ADJUSTING KNOB With this knob it is possible to set the maximum desired temperature in the boiler The setting range of this temperature is between a minimum of 35 C and a maximum of 65 C By rotating COUNTER CLOCKWISE this knob a minimum temperature of 35 C is reached By rotating completely CLOCKWI...

Page 29: ...VICE TECHNICIANS SPECIAL FUNCTIONS LAMP FOR SERVICE PURPOSES The function of this GREEN LAMP is to indicate the activation of the SERVICE mode Continuous ON led Max output for 15 min Flashing led Minimum output for 15 min OUTER TEMPERATURE SELECTOR OPERATIONAL ONLY IF OUTER SENSOR IS FITTED Si the kit outer sensor is fitted it is possible through this button to set an outer temperature value betwe...

Page 30: ...de D H W production only Select the SUMMER operation mode acting on the selector B Turn the temperature adjusting knob D on the desired value By CLOCKWISE rotation the maximum temperature is achieved WINTER mode Heating and D H W production Select the WINTER operation mode acting on the selector B Turn both the heating temperature adjusting knob C and the D H W temperature adjusting D on the desir...

Page 31: ...31 Service info ...

Page 32: ...ag info unical ag com The Unical declines every responsibility for the possible inaccuracies if owed to errors of transcript or press Also reserves the right to bring those changes that it will hold necessary to it own products or profits without jeopardizing its essential characteristics ...

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