Assessments - 1, GPA: 3
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(†) If using a blank plate instead of a burner pressure regulator, it is assumed that the burner pressure is equal to the supply pressure. In practice, however, the burner pressure will be lower. Instruction manual BFM is 3.5 Installation diagram 3.5.1 Installation This figure shows the installation diagram. This diagram is used in the sections in which the actual connection process is described. Installation diagram Legend UNVENTED Only applicable numbers are mentioned. 1. pressure reducing valve (mandatory) 3. T&P valve (mandatory) 4. stop valve (recommended) 5. non-return valve (mandatory) 6. circulation pump (optional) 7. top to bottom circulation pump (optional) 9. drain valve 10. manual gas valve (mandatory) 11. service stop valve (mandatory) 12. temperature gauge (recommended) 14. hot water draw-off points 15. expansion valve (mandatory) 16. expansion vessel (mandatory) 17. 3-way aeration valve (recommended) 18. water tank 19. float valve A. cold water supply B. hot water supply C. circulation pipe D. gas supply E. overflow pipe H. overflow pipe 1414 14 C B D 9 12 3 10 11 A45 1 16 7 4 5 4 15 13 4 6 5 4 VENTED H IMD-0467 R0 B A 4 18 19E C 14 11 4 C 464 5 D 10 9 3 17 12 4 4 7 5 13 Instruction manual BFM 3 Installation is 3.6 Water connections, Vented Warning The installation should be carried out by an authorised installation engineer, in compliance with general and local regulations (1.3 "Regulations"). 3.6.1 Cold water side See (A) in the installation diagram (3.5 "Installation diagram"). 1. Fit an approved stop valve (4) on the cold water side between the cold water head tank (18) and the appliance, as required by regulations (1.3 "Regulations"). 3.6.2 Recirculation pipe You can install a top to bottom circulation pump to prevent water stacking in the boiler. 1. Optional: depending on the draw-off pattern, fit a recirculation pipe (O 22 mm), a stop valve (11) and a top to bottom circulation pump (7). 2. Fit a non-return valve (5). 3. Fit a stop valve (11). 3.6.3 Hot water side See (B) in the installation diagram (3.5 "Installation diagram"). Note Insulating long hot water pipes prevents unnecessary energy loss. 1. Fit the T&P valve (3). 2. Optional: fit a temperature gauge (12) so you can check the temperature of the tap water. 3. Fit a stop valve (4) in the hot water outlet pipe, for use when servicing. 4. If a circulation pipe is required, continue further by installing the circulation pipe (3.6.5 "Circulation pipe"). 3.6.4 Drain valve 1. Fit the standard drain valve (9) supplied with the appliance. 2. If applicable, fit a circulation pipe (3.6.5 "Circulation pipe"). If not, fit the blind threaded plug and gasket (C) supplied with the drain valve, as shown in the figure. C IMD-0122 R1 Instruction manual BFM is 3.6.5 Circulation pipe See (C) in the installation diagram (3.5 "Installation diagram"). If an immediate flow of hot water is required at draw-off points, a circulation pump can be installed. This improves comfort and reduces water wastage. 1. Fit a circulation pump (6) of the correct capacity for the length and resistance of the circulation system. 2. Fit a non-return valve (5) behind the circulation pump to guarantee the direction of circulation. 3. Fit two stop valves for service purposes (4). 4. Connect the circulation pipe to the T-piece at the drain valve (9) as shown in the drain valve figure (3.6.4 "Drain valve"). 3.7 Water connections, Unvented Warning The installation should be carried out by an authorised installation engineer, in compliance with general and local regulations (1.3 "Regulations"). 3.7.1 Cold water side See (A) in the installation diagram (3.5 "Installation diagram"). 1. Fit an approved stop valve (4) on the cold water side as required by applicable regulations (1.3 "Regulations"). 2. The maximum working pressure of the appliance is 8 bar. Because the pressure in the water pipe at times can exceed 8 bar, you must fit an approved pressure-reducing valve (1). 3. Fit a non-return valve (5) and an expansion vessel (16). 4. Fit an expansion valve (15) and connect the overflow side to an open wastewater pipe. 3.7.2 Recirculation pipe You can install a top to bottom circulation pump to prevent water stacking in the boiler. 1. Optional: depending on the draw-off pattern, fit a recirculation pipe (O 22 mm), a stop valve (11) and a top to bottom circulation pump (7). 2. Fit a non-return valve (5). 3. Fit a stop valve (11). 3.7.3 Hot water side See (B) in the installation diagram (3.5 "Installation diagram"). Note Insulating long hot water pipes will prevent unnecessary energy loss. 1. Optional: fit a temperature gauge (12) so you can check the temperature of the tap water. 2. Fit the T&P valve (3). 3. Fit a stop valve (11) in the hot water outlet pipe for servicing. 3.7.4 Drain valve 1. Fit the standard drain valve (9) supplied with the appliance. 2. If applicable, fit a circulation pipe (3.6.5 "Circulation pipe"). If not, fit the blind threaded plug and gasket (C) supplied w...
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