1.1 Use Hanging boilers THERM DUO 50.A, DUO 50 T.A, DUO 50 FT.A are gas hot-water boilers combusting natural gas or propane. When separately used they are designed for objects with thermal losses of up to 45 kW. For heating buildings with the higher heat loss is possible DUO series boilers to align in the cascades.
It is to be reckoned with auxiliary pump system, particularly in the case of installation of a separate boiler to the heating system. 1.2.4 Simplified hydraulic and function diagrams THERM DUO 50.A Position Part Gas valve SIT Sigma 845...
THERM DUO 50 T.A Position Part Gas valve SIT Sigma 845 Lownox burners Exchanger 2x Circulation pump De-aerating valve 2x Burn gases thermostat Draught interrupting unit Heating temperature probe Emergency thermostat 10 - Safety valve 11 - Flow switch 12 - Burn gases thermostat A - Input for the return water G 1“...
1.4 Technical parameters THERM DUO Technical description Unit THERM DUO 50.A THERM DUO 50 T.A 50 FT.A Fuel natural gas propane natural gas propane natural gas Maximum thermal input power 49,0 46,7 49,0 46,7 49,0 Minimum thermal input power 19,6...
2. USER MANUAL 2.1 Control and signalling 2.1.1 Boiler control panel Control elements of the boiler are hidden under the plastic cover. The cover is opened by lightly gripping the handle in the upper part or by pressure on the lower part of the hole for the display. Switching regimes Display Multifunctional buttons...
Disconnection of water heating – setting the rotary control knob for user setting of the output temperature of the hot water to the left side position (less than 10° of the route); the heating of water can be permanently disconnected from operation.
2.1.3 Information menu Buttons are used for entrance and bi-directional browsing in the information menu in the following sequence order: PARAMETER SHOWS ON THE DISPLAY The required heating temperature The temperature of heating The required DHW temperature (2) DHW temperature (2) Outside temperature (1) Equithermal curve (factor „K“) Return to normal display...
* In the case of the occurrence of error E 08, the supply of fuel into the boiler is closed and re-burning of the boiler is blocked. After 20 min. there is automatic unblocking of the failure. In the case of a repeated occurrence, it is necessary to call a professional employee and to take measures to remove the defect.
For the control according to room temperature, Thermona delivers and recommends the whole series of room thermostats: e.g. PT 22, PT 32, BPT 22 (wireless version), Honeywell CM 707, CM 907, and others.
2.3.3 Operation of the boiler using built-in equithermal regulation This regime is accessible in the boiler in the standard variant but is not activated! The activation and the primary setting of the regulation is performed at the request of the client by an authorized service technician. During equithermal regulation the boiler changes the temperature of the heating water automatically according to the changes in the outside temperature.
For this purpose the Thermona company supplies the interface IU 04.10 that ensures the transfer of information between the boilers and the calculations of the boiler room power needs (number of working boilers and their power modulation). For further improvements, the interface IU 05 for the control boiler of the cascade can be used , which has the similar properties as the interface IU 04.10 (communication between the boilers) and also provides communication with the programmable controller...
2.3.6 Heating of domestic hot water (DHW) DUO series boilers are standard prepared for heating of hot service water in the indirect heating tank . To ensure heating of the DHW is necessary to install the three-way valve on the boiler as shown on the figure below. Tank heating of DHW - DESCRIPTION OF WORK If the thermostat of the hot water storage tank is ON, the working phase of heating of the storage tank starts.
2.3.7 The heating of water in the accumulator storage tank is in the connection with solar panels Gas condensing boilers DUO can be used for heating the solar system with the accumulation storage tank. Our geographical conditions do not enable to operate a solar system without the additional (backup) heat source which in this case is the gas boiler.
Anti-Cyclic A feature that prevents cycling of the boiler in heating mode when, during the boiler is switched off, it is not permitted to re-ignite the boiler before the set anticyclic time run out (factory default is 5 minutes). This function is most used in the heating systems where maximum heat loss of the object corresponds to the lowest limit of the boiler output range.
In such cases the service organisation may require that the client pays for the repair. THERMONA spol. s r. o. provides a warranty according to the stated in the Warranty Certificate delivered with the product. Terms for application of the warranty: 1.
3. INSTALLATION MANUAL 3.1 Basic instructions for assembly of the boiler Hanging boilers THERM DUO 50.A, DUO 50 T.A, DUO 50 FT.A series are designed for operation in standard hot-water heating systems. Assembly must only be performed by a qualified professional company and it is necessary to pay attention to all advice and notifications contained in this manual.
3.3 Location of the boiler Boilers DUO serie can be installed in the basic AA5/AB5 environment according to ČSN 2000-3 and ČSN 33-2000-5-51 ed. 3 (range of temperature +5 to 40°C, moisture depending on the temperature up to a maximum of 85%, without harmful chemical influences).
3.4 Suspending the boiler THERM hanging boilers in the DUO serie are suspended on the wall by the suspension bar delivered with the boiler according to the diagram. Procedure for suspending the boiler: 1. Consistently measure the position of the suspension of the boiler (according to the diagram with the dimensions) 2.
3.5.1 Dimensions and connection DUO 50.A DUO 50 T.A DUO 50.A, 50 T.A 1 - Heating water outlet G 1”, external 2 - Input return water G 1”, external 3 - Gas inlet G 3/4”, external 4 - Output of the safety valve G 1/2”, internal DUO 50 FT.A DUO 50 FT.A 1 - Heating water outlet G 1”, external...
Due to the delivered output of the boiler and the resistance properties of the exchanger, we do not recommend decreasing the output of the pump. Connecting overpressure THERM DUO 50.A, 50 T.A, 50 FT.A Wilo Grundfos Water ow (m /hod.)
3.5.5 Safety valve In the lower part of the boiler is a safety valve. When operating the boiler, under certain circumstances, there can be penetration of water or escape of steam from the safety valve. Due to this reason it is recommended to install on the output of the safety valve suitable leakage which will terminate into the waste system.
3.9 Connection to the chimney - DUO 50.A version The mentioned variant of boiler is connected to a special chimney air channel that must have a diameter corresponding to the power of the boiler and must be lined in relation to ČSN. Before connecting the boiler, we recommend to consult with a chimneysweep or to ensure preliminary revision.
The maximum total pressure loss of gas collection is 80 Pa. Example of gas collection THERM DUO 50 T.A THERM DUO 50 FT.A 3.11 Connection of the boiler to the storage tank The DUO boiler (after expansion by the three-way valve) may be reliably and efficiently resolved together with the heating for the heating system and heating of water (TV).
3.12.2 Connection of a room regulator with OpenTherm+ communication The intelligent room regulator is connected similarly as the connection of the traditional spatial thermostat. The regulator is connected to the same terminal. It is not possible to connect two types of regulators at the same time! Technical recommendation during the connection of the regulator with OpenTherm+ communication with the boiler The connecting cable supplies the regulator for the transfer of the signal of the mutual communication by the protocol...
4.2 Graphs for setting the boiler output Graph of THERM DUO 50.A, DUO 50 T.A power setting (natural gas), nozzles - 1 mm Output at the start Boiler output (kW)
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Graph of THERM DUO 50.A, DUO 50 T.A power setting (propane), nozzles - 0,6 mm Output at the start Boiler output (kW) Graph of THERM DUO 50 FT.A power setting (natural gas), nozzles - 1 mm Output at the start...
5. RECORD OF WARRANTY AND POST-WARRANTY REPAIRS AND ANNUAL CONTROLS Performed action Contractual organisation Signature of client Date of record Notification of package and product disposal after termination of its service life: All materials used are fully harmonized with the requirements stated in Section 10 of Act No. 185/2001 Coll. and section 6 of Act No. 477/2001 Coll.
Technical Testing Institute s.p., EC notified body, identification number 202. THERM DUO 50.A, DUO 50 T.A - Certificate of testing of the model according to the EC Directive for consumer appliances for gas fuel 90/396/EEC, No.
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