Hamworthy F40H Installation, Commissioning And Operating Instructions

Contents

Hamworthy F40H Installation, Commissioning And Operating Instructions Manual pdf 16 page image

HAMWORTHY HEATING LTD10FLEET H series 500001212/F4.3 Flue System The Fleet flue systems supplied by Hamworthy are non UV stabilised polypropylene andare therefore suitable for internal use only. For external flue runs and termination, eitheruse the dedicated kits supplied by Hamworthy or refer to a chimney specialist . Flue termination, routing and construction must comply with the requirements of theClean Air Act 1956, BS 6644, BS 5440 and IGE/UP/10 where applicable. Individual modules must be flued using the concentric or twin duct systems provided orconnected into conventional chimney system suitable for condensing application. Fleet boilers are suitable for open flue (type B23) installation, drawing combustion airfrom the plant room, or room sealed, twin duct (type C53) installation - see section 5.2.For type B23 installations, the maximum number of modules firing into a commonchimney is 9. For larger installations refer to HHL Technical. The flue system must bedesigned to limit the max. suction (cold) to 30Pa negative, measured at the connection tothe boiler. If the suction is greater than 30Pa, refer to HHL technical.This condition must then be checked hot and with all boilers firing, the max. pressure atthe connection to the boiler should be 150Pa positive. In the event that the flue systemwhen hot does generate a suction, the max. suction is 100Pa. For type B23 installations the Hamworthy air inlet filter MUST always be fitted .Refer to Appendix C. Any stabiliser fitted must be in or close to the vertical chimney. Due to the low flue gas temperature, (~50°C) condensation will occur in the flue, fluematerials must be non-corrosive and utilise fully sealing joints. Adequate facilities must be provided for draining the flue condensation from the fluesystem using the components available from HHL - refer to Appendix C. For short flueruns (<1m) it is not practical to provide drainage from the flue system.Horizontal runs of flue must provide condense drainage from the flue /chimney and mustslope at 3° (50mm/m) along the horizontal length, towards the boiler. For longer fluesystems (>1m), the flue system MUST NOT drain through the boiler - see section 5.2 .For multiple boilers into a common flue header, the common header must slope at 3°back to the boilers and provision made to remove condensate from the header - seesection 5.2 . Horizontal flue runs must be kept as short as possible and be inclined at minimum 3°(50mm/m) towards the boiler.For maximum equivalent flue lengths, refer to Appendix C. Any flue must be self-supporting and separable from the boiler for servicingrequirements. Note: Due to high thermal efficiency of the Fleet boiler and the resultant low flue gastemperatures there will be visible pluming of the flue gases at the flue termination. Thisis likely even when the boiler is not operating at condensing temperatures. Fan dilution - the design must provide for the use of balancing and trim dampers,and their location and operation must be such that the constraints detailed abovecan be met. Care must be taken to ensure that the fan performance is matched todeliver the appropriate dilution, whilst ensuring that excessive suction is notapplied to the boilers. If in doubt, refer to HHL Technical.