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Summary of Contents for Unical DUA plus BTN 28
- Page 1 DUA plus BTN 28 - BTFS 28 INSTALLATION AND USER INSTRUCTION MANUAL 00333957 - 1st edition - 09/2011...
- Page 2 Before installing the boiler, check that the technical data supplied by Unical, correspond to requirements for its correct use in the system. Before making any service on to the boiler switch off the power supply. In the event of failure and/or faulty functioning, switch off the boiler. Do not attempt to make repairs: contact qualified technicians.
- Page 3 General info DATA PLATE DESCRIPTION CE Marking The CE marking documents that the boilers satisfy: The essential requirements of the Efficiency Directive (Directive The essential requirements of the Directive regarding gas 92/42/CEE) appliances (Directive 90/396/CEE) The essential requirements of the low voltage Directive (Directive The essential requirements of the Directive regarding 73/23/CEE) electromagnetic compatibility (Directive 89/336/CEE)
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Page 4: Table Of Contents
General info For your own safety, observe these safety instructions.: WARNING PLEASE NOTE: WARNING Identifies potentially dangerous from risk of electric shock. User tip for the optimum utilisation situations. and setting of the control(s) plus useful information. TECHNICAL CHARACTERISTICS AND DIMENSIONS ............... -
Page 5: Dimensions
· Manometer; The main technical features of the DUA · Tap water flow rate restrictor set at 12 DUA plus BTN 28 with natural draught plus B boilers are summarised below: litres/min; open chamber · Unlocking of check valves;... -
Page 6: Hydraulic Circuits
Technical features and dimensions 1.3 - HYDRAULIC CIRCUITS Filling system cock Boiler draining valve By-pass DUA plus BTN 28 No-return valve Pump Air vent Modulating gas valve Low water pressure switch Ignition electrode 10 Burner injectors 11 Ignition electrode 12 Ionisation electrode... -
Page 7: Operational Data
148,5 Insulation degree Net weight (dry) (*) Warning: The utilisation of this type of boilers in the "floor heating systems" needs the use of specific equipments (e.g.: UNICAL Thermic Module) to avoid all risks of smoke condensation within the boiler. -
Page 8: Instructions For The Installer
Keep the packaging out of the reach of chi- ldren as it represents a choking and suffo- cation hazard. UNICAL waives all liability for injury to persons and animals or damage to pro- perty resulting from non-observance of the above. -
Page 9: Position Of The Boiler
D.H.W. outlet, CH flow and heating system pipes, carefully clean and return in the positions shown by the Unical refuses all liability for injury to persons the pipes to remove all traces of metal template. and animals or damage to property resulting resulting from processing and welding - fit the boiler onto the support hooks;... -
Page 10: Ventilation
Installation info 2.2.4 - VENTILATION The boiler must be installed in a suitable room A correct ventilation can be optained also FORCED DRAUGHT ROOM SEALED BOI- according to the rules in force and particu- through the addition of more openings, larly: (TYPE C12 - C32 - C42 - C52 - C62 - C82) provided the addition of the different sec-... - Page 11 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 a result of incorrect installation, use, modi- fication of the boilers or for non-observance...
- Page 12 Installation info The DUA plus B is a forced draught, room The forced draught, room seled boilers, nor- When, in some country, it is allowed to eva- seled boiler; so it does not need particular mally should evacuate the smokes on the cuate on the front of the building, the fol- ventilation openings for the combustion air, roof of the building.
- Page 13 Installation info 2.2.5 - SMOKE DISCARGE AND AIR SUCTION DUCTS CONFIGURATION TYPES C12, C32, C42, C52, C82 The DUA plus boiler has been approved for type the following air suction and smoke evacuation tipes: Boiler designed for connection to horizontal exhaust and suction terminals directly into the atmosphere using coaxial or dual ducts.
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Page 14: Smoke Discharge System Forced Draught Boilers
Installation info 2.2.7 - SMOKE DISCHARGE SYSTEM FORCED DRAUGHT BOILERS Type C12 The maximum autorised length for the horizontal coaxial pipes is 3 meters; for each supplementary bend the maximum length will be reduced by 1 meter; furthermore the pipe shal have a downward inclination of 1% on the outlet direction in order to avoid the rain enter the pipe. - Page 15 Installation info 2.2.8 - SMOKE EVACUATION THROUGH TWO SEPARATE DUCTS Ø 80 (Type B accessories) NB: The maximum allowed pressure Δ Δ Δ Δ Δ From P=40 Pa drop, according to the installation type, must be equal to the value indicated installation examples given on page 17.
- Page 16 Installation info CONFIGURATIONS FOR SEPARATE PIPES (SUCTION AND OUTLET) Ø 80 Example N.1 Example N.1 Primary air suction from perimeter wall and flue gas discharge on roof. Maximum allowable pressure loss: 65 Pa Hmin. = 165 mm fig. 13...
- Page 17 - Ø 80 L = 0.6 m horizontal discharge end section, the pressure loss is 5 Pa; fig. 14 These values refer to discharges through original UNICAL non- Example of check using wide radius flexible and smooth ducts. bends: In both of the following examples the hypotized compositions of the - 15 m duct Ø...
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Page 18: On Site Combustion Efficiency Measurement
Installation info 2.2.9 - ON SITE COMBUSTION Analyser EFFICIENCY MEASUREMENT TSC0210C probes Coaxial ducts (Type A accessories) To determine combustion efficiency the following measurements must be made: - the combustion air temperature measured in hole 2 (see fig. 15). - the flue gas temperature and CO measured in hole 1 (see fig. -
Page 19: Electrical Connections
If this precaution is not taken, activation of D.H.W. PRODUCTION the safety valve may result in flooding of the room where the boiler is installed. UNICAL shall not be held responsible for damage caused by non-observance of this technical precaution. The hardness of the supply water affects the frequency of the cleaning of the heat exchanger;... -
Page 20: Electrical Wirings
Installation info 2.3 - ELECTRICAL WIRING 2.3.1 - ACTUAL CONNECTION DIAGRAM A1…A8 = Utility connectors = Ionization electrode connection on the main board = Room thermostat and outer sensor connectors = Voltage connector = Pressure switch for low water level E. - Page 21 MARRONE (L) CAVO PVC 3x0,75 Ø MARRON E AZZURRO (N) Replacement of the supply cable When replacing the supply cord, the UNICAL original one, Part. code 00610308, must be used. Get access to the supply terminal block Y2 (see previous paragraph).
- Page 22 Installation info 2.3.2 - POSITIONING OF THE JUMPERS POSITIONING OF THE JUMPER JUMPERS ON THE DISPLAY PCB JP4 : GAS TYPE SELECTION Naturl gas: Jumper on NAT (standard supply position) Liquefied Petroleum Gas: move jumper to LPG position The standard supply position correspond to the gas type shown on all the labels within the boiler JP3 : EXTRNAL TEMPERATURE COMPENSATION FOR OUTER SENSOR Boiler with outer temperature sensor: jumper on...
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Page 23: Filling Of The Heating System
Installation info 2.4 - FILLING THE SYSTEM After completing all the connections of the system the heating circuit can be filled. Filling This filling operation must be performed cock with care as follows: - open the air vents of the radiators and boiler check that the automatic air vent in the boiler is works properly;... - Page 24 Adjustment info 2.6 - ADJUSTING THE PRESSURE TEST NIPPLE BURNER All the instructions below are for the exclusive use of qualified technicians. All the boilers leave the factory adjusted and tested. If it is necessary to change the adjustment due to changes in the gas or adaptation to the supply network conditions, it will be also necessary to re-adjust the gas valve.
- Page 25 Adjustment info 2.7 - ADAPTING THERMAL GAS PRESSURE BURNER DIAGRAM CORRESPONDING TO POWER TO THE HEA- THE SYSTEMS OUTPUT TING SYSTEM With the heating system cold. BTN 28 Connect the pressure gauge to the burner PROPAN as shown in fig. 24, switch on the boiler in BUTAN heating mode and proceed as follows.
- Page 26 Any subsequent conversion must be performed by qualified technicians who will use the kits supplied by Unical and perform the conversion and required adjustments for correct preparation of the boiler for use. To convert the boiler from one type of gas...
- Page 27 Service info 2.9 – FAULT FINDING CHART AND POSSIBLE SOLUTIONS In case of fault lamp lighting depress the Reset push button and, while kipping it depressed, look at the error code given by the flashing leds. Note: The error code is given by the combination of two, three, four of five leds, flashing on the temperature scale.
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Page 28: Panel Board
Service info USER'S INSTRUCTIONS 3.1 - PANEL BOARD 65° 80° 60° 70° 55° 60° 50° 0 °C -10 °C 50° 45° 40° 40° -20 °C 10 °C 30° 35° 20° MIN - MAX ® plus fig. 29 A = Mode selector: Heating only- Heating + D.H.W. F = Signal lamp of D.H.W. - Page 29 Service info SPECIAL FUNCTIONS BUTTON THERMOMETER MANOMETER (FOR SERVICE PURPOSES) It shows the water pressure inside the This button allows the activation of the Through the thermometer scale of the panel heating circuit, whose value, in cold SERVICE mode. (see paragraphe 2.6 board it is possible to verify: condition,should not be lower than 0,8/1 bar.
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Page 30: Ignition And Extinction
This operation has to be made, According to the national laws the service of the antifrost protection system does not preferably, by the Unical Service Center the heating appliances is compulsory. work and the temperature detected by the charged for maintenance of the boiler. - Page 31 Service info...
- Page 32 - 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...
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