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For the operator ROTEX A1 BO Oil condensing boiler Operating manual 0645 BM Type Rated thermal output ROTEX A1 BO 15bio 12–15 kW Edition 10/2007 ROTEX A1 BO 20i 12–20 kW ROTEX A1 BO 27i 20–27 kW ROTEX A1 BO 35i 25–35 kW...
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Guarantee and conformity ROTEX provides a warranty for material and manufacturing defects according to this statement. Within the warranty period, ROTEX undertakes to have the unit repaired free of charge by a person assigned by the company. ROTEX reserves the right to replace the unit.
Relevant documents – ROTEX A1 BO Installation and maintenance instructions for the heating expert. – The documentation of the ROTEX Control being used. It is included in the scope of delivery of the Control. Warning signs and explanation of symbols Meaning of the warnings Warnings in this manual are classified according into their severity and probability of occurrence.
ROTEX oil condensing boilers are state-of-the-art and are built to meet all recognised technical requirements. However, improper use can lead to serious injuries or death, as well as causing material damage. To avoid danger, install and operate ROTEX oil condensing boilers only: –...
• Operate the oil condensing boiler only if sufficient combustible air supply is guaranteed. If operating the oil condensing boiler independently of the ambient air with an air/flue system (LAS) with dimensions according to ROTEX-Standard, this is automatically guaranteed and there will be no further conditions required of the unit installation room.
Product description Boiler design and components Product description A1 BO 15bio / A1 BO 20i A1 BO 27i / A1 BO 35i A1 Schematic drawing Fig. 2-1 Boiler components – View from the front Fig. 2-2 Diagram A1-boiler A1 BO 15bio / A1 BO 20i A1 BO 27i / A1 BO 35i Fig.
Operating mode The ROTEX oil condensing boiler A1 BO is designed in such a way that it can be operated independent of ambient air. The burner suctions the combustion air directly in through an installation shaft or a double-walled flue gas pipe. This operating mode has several advantages: –...
Service screw Recirculation tube Nozzle connection cover Fig. 2-4 Oil burner top view (rear view) Fig. 2-5 Oil burner – Side view from left 13 22 Fig. 2-6 Oil burner – Side view from right BA ROTEX A1 BO - 10/2007...
The electronic control unit detects the existing sensor configuration automatically when switching on the oil condensing boiler for the first time. You will find more instructions and an exact description in the documentation "ROTEX Control". It is included in the scope of supply of the particular electronic control to be ordered separately.
Hot water storage tank There are 5 types of hot water storage tank available for the oil condensing boiler A1 BO. The ROTEX Solaris System for hot water preparation can also be incorporated. For further information on hot water storage tanks, please consult the documentation for Sanicube INOX, Sanicube PEX and Solaris.
The oil condensing boiler will not function without a central control unit. The control unit must be ordered separately in the desired model (operation allowed only with ROTEX controls). Status at the time of delivery The following outputs are factory-set:...
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If the oil condensing boiler is connected to a heating system with steel pipelines, radiators or non-diffusion-proof floor heating pipes, slurry and chips could enter the boiler and cause blockages, overheating or corrosion. For this reason ROTEX recommends fitting a dirt filter in the heating return flow.
– Procedure in the event of a fault. The scope of supply includes an installation and training form. Correct handover should be recorded in the files by completing this form jointly with the installer. BA ROTEX A1 BO - 10/2007...
Controls on the boiler control panel Operation The ROTEX oil condensing boiler A1 BO can be operated with the THETA 23R controller or with the ALPHA 23R controller. The electronic digital controls are to be used for controlling 2 heating circuits (direct heating circuit, mixer circuit) and a storage tank charging circuit.
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Select one of the 3 pre-installed timer programmes P1, P2 or P3. You can find further instructions and a more exact description in the documentation for "ROTEX controller THETA 23R". It is included in the scope of supply of the particular electronic control to be ordered separately.
• Select the parameter by turning the rotary button to the left or to the right until the desired value is shown in the display. • Accept the selection by pushing the rotary button. BA ROTEX A1 BO - 10/2007...
Operation 4.1.3 Control THETA 23R Only the control and display elements of the ROTEX central control unit ALPHA 23R are described below. For the controls of the complete boiler control panel, see section 4.1.1. Fig. 4-3 Controls on the boiler control panel with integrated control ALPHA 23R...
4.2.1 Manual setting of the boiler temperature (control THETA 23R) When using the THETA 23R controller, the ROTEX A1 BO can be controlled manually to manually heat up the heating system or to temporarily manually adjust the boiler temperature.
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This allows you to save on electricity to drive the pump. The pump fitted in the oil condensing boiler ROTEX A1 BO20i consumes approx. 75–80 W at output level 3, approx. 55–60 W at output level 2.
If no heating and no hot water supply is needed over a long period, the oil condensing boiler can be temporarily shut down. ROTEX, however, recommends putting the system on Standby mode (see Documentation "ROTEX Control"). The heating system is then protected from frost.
• Bleed all the water in the entire system at the filling and draining sockets (KFE cock). Re-commissioning If the ROTEX Oil condensing boiler A1 BO has been out of service for an extended period, certain preparatory tasks and tests need to be carried out for re-commissioning.
In case of systems with a hot water storage tank: Does the temperature of the radiators increase slowly after charging the storage tank has finished? Are all the heating pipes free from leaks? Only if all questions can be answered by "yes" may the system be started up again. BA ROTEX A1 BO - 10/2007...
Recommendations for disposal The ROTEX oil condensing boilers are designed to be environmentally friendly. During the disposal process, the only waste accrued is that which can be used for material or thermal recycling. The materials used can be separated into different types.
– Replacement of the consumables (if required). ROTEX recommends a service and maintenance contract to ensure regular service and maintenance. • Service and maintenance should be recorded in the maintenance record. The maintenance record is included in the scope of supply.
• Check all components of the flue system for leakage and damage. Repair damaged parts or replace them. • Check all electrical components, connections and pipes. Repair damaged parts. BA ROTEX A1 BO - 10/2007...
A pH value 5 despite regular maintenance indicates that the neutralisation medium is spent and the filling quantity is no longer sufficient. In such a case, change the neutralisation medium ( 15 45 75). BA ROTEX A1 BO - 10/2007...
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3. Lift up condensate treatment unit and drain through the connecting hose (fig. 5-5). 4. Place collector container under the hose connection. Pull out the flexible connecting hose from the condensate treatment unit (fig. 5-6). 5. Pull the condensate treatment unit out from under the boiler. BA ROTEX A1 BO - 10/2007...
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The condensate treatment unit is filled through the boiler. For this, open the boiler body, remove the combustion chamber insert and hold a water hose in the combustion boiler (fig. 5-10). Fig. 5-9 Fill condensate treatment unit Fig. 5-10 Fill condensate treatment unit through the boiler through the flue gas pipe BA ROTEX A1 BO - 10/2007...
(shown A1 BG 20i) • Only in A1 BO 27i and A1 BO 35i: Remove cylindrical combustion chamber ring. • Remove combustion chamber insert with the help of the combustion chamber key (fig. 5-13 and fig. 5-14). BA ROTEX A1 BO - 10/2007...
Checking the burner includes visually inspecting the burner's condition as well as making flue gas measurements. The quality of combustion and correct burner adjustment can only be checked with a flue gas analyser. ROTEX recommends that this test be carried out annually by a heating expert.
Detailed information for the control, the operating mode and parameter setting and concerning the error codes can be taken from the "ROTEX Control", which is included in the scope of supply of the associated control. Troubleshooting •...
Ignition electrodes contaminated or humid Ignition electrodes burnt out Insulating body cracked Ignition transformer defective Ignition cable burnt Automatic firing unit faulty Tab. 6-2 Possible malfunctions on the A1 BO (Part 1) 1) see documentation "ROTEX control" BA ROTEX A1 BO - 10/2007...
Unlocking the STL • Remove the sound insulation hood (see fig. 5-1). • Unscrew the cover on the STL. • Unlock STL switch with pointed object. • Screw on STL switch. • Install sound insulation hood. BA ROTEX A1 BO - 10/2007...
• Adjust the desired temperature with the rotary switch (setting range 5–80 °C). In manual operation, the 3-way diverter valve is in the "Storage tank charging" position first. On reaching the maximum adjustable storage tank temperature, the 3-way diverter valve is switched to the "Heating" position. BA ROTEX A1 BO - 10/2007...
Technical data Dimensions and connection dimensions Technical data Fig. 7-1 Dimensions of the model versions, side view Fig. 7-2 Dimensions and connection dimensions of the model versions, rear view BA ROTEX A1 BO - 10/2007...
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≥ ≥ ≥ 1340 1890 1650 1470 2020 1770 1590 2140 1890 Υ 1100 1730 1480 1220 1850 1600 1340 1970 1720 Tab. 7-1 Installation dimensions for oil condensing boiler A1 B0 in mm BA ROTEX A1 BO - 10/2007...
Test as specified in EN 267 Registration number: 5 G 966/2001 Output electrical motor at 2800 min −1 90 W 90 W 90 W 180 W Protection type IP 40 Tab. 7-3 Basic data oil burner BA ROTEX A1 BO - 10/2007...
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3.8 m 6.0 m 6.2 m 3-way diverter valve Voltage 230 V, 50 Hz Maximum power consumption 4.3 W Protection type IP 40 Turnaround time Tab. 7-5 Technical data of the integrated connection group BA ROTEX A1 BO - 10/2007...
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Technical data Remaining pumping height 1000 1200 1400 1600 m / L/h Fig. 7-4 Remaining pumping height A1 BO 15bio Δp Remaining pumping height Flow heating network 1000 1200 1400 1600 1800 2000 m / L/h Fig. 7-5 Remaining head A1 BO 20i (stage 1 blocked) Δp...
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Remaining pumping height A1 BO 27i Δp Remaining pumping height Flow heating network 1000 1200 1400 1600 1800 2000 m / L/h Fig. 7-7 Remaining pumping height A1 BO 35i Δp Remaining pumping height Flow heating network BA ROTEX A1 BO - 10/2007...
Technical data Wiring diagram Fig. 7-8 Wiring diagram for oil condensing boiler A1 BO (shown with ROTEX THETA 23R Control) Mains switch Return flow temperature sensor 7-pin circuit board connector for clamping a mixer Burner malfunction indicator Flow temperature sensor...
Operating mode of the installation where the boiler does not draw the air required for combustion from the installation room, of ambient air but from outside via the air-flue gas system. ROTEX recommends this method of operation. Timer programme Time settings that are entered in the control to specify regular heating, setback and hot water phases.
Fig. 9-2 Brief instructions for chimney sweep operating mode in symbols ROTEX THETA 23R ROTEX ALPHA 23R Flue gas mass flow Burner output Fig. 9-3 Flue gas mass flow in relation to the burner output BA ROTEX A1 BO - 10/2007...
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