User manual REMEHA GAS 3002 ECO

[. . . ] Technical information Remeha Gas 3002 ECO Remeha Gas 3002 ECO · High efficiency condensing boiler with Low NOx emission · Range 177 - 531 kW · mbc 3. 0 Remeha Gas 3002 ECO CONTENTS Preface 1. Efficiency information 4. 1 Combustion efficiency 4. 2 Efficiency 4. 3 Standing losses 4. 4 Annual efficiency 5. Application data 5. 1 Delivery and positioning 5. 1. 1 General 5. 1. 2 Location 5. 1. 3 Support 5. 2 L. P. H. W. configuration 5. 2. 1 Water temperature 5. 2. 2 Water pressure 5. 2. 3 Water circulation 5. 2. 4 Water treatment 5. 2. 5 Noise levels 5. 3 Hydraulic circuits with Low Loss Header 5. 3. 1 Single boiler installation 5. 3. 2 Modular boiler installation 5. 4 Installation instructions 5. 5 Condensate discharge 5. 6 Flue gas discharge and air supply 5. 6. 1 General 5. 6. 2 Requirements 5. 6. 3 Conventional room ventilated 5. 6. 4 Room sealed operation 6. [. . . ] If for instance one of the sensors signals a water temperature increase which is too rapid, the boiler will be shut down. If the differential temperature across the boiler exceeds 45°C, the boiler will go into a control stop. 7. 5. 4 Temperature protection Water temperature protection is ensured with three water temperature sensors: a flow temperature sensor, a return temperature sensor and a water temperature sensor installed in the boiler block at the sensitive spot (heat exchanger temperature sensor). If the flow sensor signals a temperature which exceeds or threatens to exceed the preset maximum operating temperature + 5°C (see para. At the same time the rate of increase in the water temperature is monitored, so that the boiler is switched off in time and heat transfer is prevented. If one of the sensors still signals a water temperature higher than 110°C, the boiler will lock out. The flue gas temperature is limited by a flue gas temperature sensor (locking) with a default setting of 230°C. 7. 5. 5 Flue gas transport protection The flue gas transport is protected by a pressure differential sensor. Fig. of gas train, 11 to 19 sections Legend A Gas cock (hand-operated) MP Measuring point F Gas filter VA Safety valve DR Gas governor MB Multibloc IT Ignition transformer HB Main burner FD Flame control --Not supplied as a standard feature. 7. 4. 2 Specification Multibloc with gas/air ratio control consisting of: - Gas filter (7 and 9 sections only) - Two safety valves - Pressure regulator for gas/air ratio. 21 Remeha Gas 3002 ECO 8. ASSEMBLY GUIDELINES AND INSTALLATION INSTRUCTIONS FOR THE HEATING ENGINEER 8. 1 General The Remeha Gas 3002 ECO is delivered unassembled. The dimensions allow for transportation of all parts to the boiler room through normal access doors. 8. 2 Water connections The water connections consist of flanges to DIN 2633, BS 4504 PN16 (DN 65 for boilers with 7 to 11 sections and DN 80 for boilers with 13 to 19 sections) and are located at the same side as the gas and air supply connections (in room sealed construction). The standard location of these connections is the top left on the boiler. If specified when ordering, it is possible to have the connections installed at the top right side. The water connections, the gas connection, the air supply connection (in room sealed form) and the control panel are always located at the same side. Just below the flange of the flow connection there is a 11/4" welding socket for fitting of a safety valve (see para. Furthermore, a pocket (Ø 15 mm) for installation of a weather compensated boiler control is located in the flow piping underneath the boiler casing. As an option, it is also possible to get the boiler delivered with separate flow and return connections (DN 65) for the second heat exchanger (ECO). 8. 3 Water pressure Each boiler section undergoes a test pressure of 12 bar. The boilers are designed for operating pressures between 0. 8 bar and 6 bar. GAS SUPPLY 9. 1 General The local Gas authority should be consulted to ensure that an adequate pressure and supply is available, at the boilers maximum output. [. . . ] too high Flue gas temperature threatens to rise above the set maximum value. 4) Minimum setting: 15°C above maximum return water temperature - boiler setting - boiler fouling main supply voltage too low main supply voltage too high Mains supply too low or too high. Take off fan cable from cable channel Other messages flue resistance high, check heat exchanger preventive message see documentation Instructions For the necessary air differential pressure a higher fan speed than normal is required. This could indicate that boiler, flue gas discharge line and air intake pipe and/or siphon fouling. 34 13. [. . . ]