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Summary of Contents for Unical DUA plus
- Page 1 DUA plus INSTALLATION AND USER INSTRUCTION MANUAL 00333638 - 1st edition - 09/2010...
- 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.
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Page 3: Data Plate Description
General information 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) -
Page 4: Table Of Contents
General information 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
• Signal lamp indications for: D.H.W. Boilers for Central Heating (C.H.) only: request, C.H. request, power on, burner DUA plus 24 is a wall hung gas boiler with in operation, thermometer, boiler fault. atmospheric burner and elctronic ignition. It • D.H.W. priority flow switch (only for C... -
Page 6: Hydraulic Circuits
Technical features and dimensions 1.3 - HYDRAULIC CIRCUITS 1 Thermostatic diverting valve (T) DUA plus CTN 24 (T) 2 Low water pressure switch 3 C.H. safety valve 4 Modulating gas valve 5 Burner injectors 6 Ignition electrode 7 D.H.W. temperature sensor... - Page 7 General information 1 Electric motorized diverting valve (E) DUA plus CTN 24 (E) 2 Low water pressure switch 3 C.H. safety valve 4 Modulating gas valve 5 Burner injectors 6 Ignition electrode 7 D.H.W. temperature sensor 8 Main heat exchanger...
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Page 8: Operational Data
Maximum absorbed output 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 9: Instructions For The Installer
2.2 - INSTALLATION 2.2.1 - PACKAGING The Dua plus boiler is delivered packaged in a strong cardboard box. After removal of the boiler fron the box make sure that it is not damaged. The packaging materials are recyclable: then, send them to the appropriate selection zones. -
Page 10: Position Of The Boiler
Installation info 2.2.2 - POSITIONING OF THE BOILER MOUNTING TEMPLATE Every boiler is supplied with a dedicated "Metallic mounting jig" to allow the correct positioning of the gas, water and C.H. when the hydraulic system connections system is being laid out and before the boiler is installed. -
Page 11: Assembly The Boiler
(TYPE B22) (i.e. with ventilation openings facing out- which need air for their operation (e.g. a If the DUA PLUS TFS are installed in a room wards) or an indirect ventilation (i.e. with ven- wall exhauster) the section of the venti-... - Page 12 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 13 Installation info The DUA plus 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 cuate on the front of the building, the fol-...
- Page 14 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 15: Smoke Discharge System Forced Draught Boilers
Installation info 2.2.6 - 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 16 Installation info EXAMPLE WITH THE AIR SUCTION DUCT ON THE R.H. SIDE 2.2.8 - SMOKE EVACUATION THROUGH TWO SEPARATE DUCTS Ø 80 Δ Δ Δ Δ Δ Δ Δ Δ Δ Δ From P=15 up to P=30 Pa (Type B accessories) NB: The maximum allowed pressure drop, according to the installation type, must be equal to the value...
- Page 17 Installation info DIMENSIONS FOR CONNECTION THE AIR INTAKE AND THE FLUE GAS DISCHARGE WITH DUAL DUCTS Ø 80 ® plus fig. 15 CONFIGURATIONS FOR SEPARATE Example N.1 PIPES (SUCTION AND OUTLET) Ø 80 Example N.1 Primary air suction from perimeter wall and flue gas discharge on roof.
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Page 18: On Site Combustion Efficiency Measurement
5 Pa; Example of check using wide radius bends: These values refer to discharges through original UNICAL non- - 15 m duct Ø 80 x 2 = 30 Pa flexible and smooth ducts. 2x90° Ø80 long radius bends 2x4= 8 Pa In both of the following examples - horizontal Ø... -
Page 19: Gas Supply Line
If this precaution is not taken, activation of rotation the safety valve may result in flooding of the room where the boiler is installed. UNICAL shall not be held responsible for By-Pass damage caused by non-observance of this CLOSED technical precaution. -
Page 20: Electrical Wirings
Installation info 2.3 - ELECTRICAL WIRING 2.3.1 - ACTUAL CONNECTION DIAGRAM A1...A8 = Connectors Connector of the ionisation on the ignition PCB Connector TA - Outer sensor Connector for supply 230 V-50 Pressure switch against lack of water E. RIV. = Ionisation probe E. - Page 21 CAVO PVC 3x0,75 Ø AZZU RRO (N) MA RRONE 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 (their purpose is to implement some functions necessary for the operation 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...
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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 TERMOSTATIC system the heating circuit can be filled. This filling operation must be performed with care as follows: - open the air vents of the radiators and 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 NOZZLES - DIAPHRAGMS - PRESSURES - GAS FLOW RATES The pressures at the burner indicated in the following table must be checked after the boiler has been operating for 3 minutes. DUA plus RTN 24 - DUA plus CTN 24 Burner pressure Type of Ø...
- Page 26 Service info 2.8 – 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 27: 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 28 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 29: 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 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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