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Dragon ShellClick the individual drawing to magnify
SPECIFICATION S.1Boiler tappings are one-off flanged flow and return
connections and eight tappings which are fitted on top of the boiler to
accommodate altitude gauge, thermometer, air vent, safety valves, limit and
control thermostats. A drain cock is mounted at the rear of the boiler. A
control high limit dual thermostat is supplied as standard pre-wired and a
short flexible oil connection and strainer. An Electronic temperature
controller, combining operating and limit function complete with type K Thermo
couple located in common flow header can be supplied as an optional extra. SPECIFICATION S.2This boiler burner unit is fully packaged, all as S.1, but includes mountings and meets Ministry specifications, with particular reference to M & E 3. Thermostats are supplied as standard, pre‑wired together with short flexible oil connection and strainer. Packaged unit includes boilers with fully insulated casings up to 100mm and/or to the relevant British Standard. Boiler tappings are one-off flanged flow and return connections and eight tappings with fitted altitude gauge, safety valve (National enclosed spring loaded type), control and limit dual thermostat in pocket, open air vent, spare tapping for high/low thermostat. In addition a drain cock is mounted at the rear of the boiler. SPECIFICATION S.4Boiler only otherwise all as S. 1, supplied with boiler casing and front plate to suit burners being supplied by customer. SPECIFICATION S.5Comprehensive boiler to any of above specifications complete with circulating pump or shunt pump and all interconnecting pipe work, valves and fittings. Details on request. SPECIFICATION S.6Boilers supplied to any of the above specifications as
combination units complete with hot water cylinders. Details on request. COMPACT DESIGNThe DRAGON SHELL 3 pass wet back boiler with pressurised combustion chamber is designed to allow the first and second passes of gas to be made within the chamber. The boiler is designed with a unique third pass heat exchange (Kayanson 'CONVECTION' design) to ensure a minimum of 80% efficiency. BOILER
MAINTENANCE
The oil gas burner supplied is mounted on a firing door,
which is insulated together with a refractory lining and seal on the inside of
the boiler. In addition, a hinged door (standard left) is provided at front of
boiler for access to the third pass, together with an inspection plate at the
rear of the boiler. (Right hand hinge can be supplied if required and
specified). QUALITY AND EFFICIENCYUnits, insulated to the relevant British Standards, are working under pressurised combustion overcoming light-up or cold start resistance. Each boiler is constructed from boiler quality steel plates and complies to all relevant International, British and Ministry standards. Quality has been assessed by BSI Quality Assurance Service to BS5750, certificate No. FM1566 TablesAll dimensions and relevant connections are in mm.
D.4 - D.10 flow and return connections flanged to BS4504. Table 6/5 D.4 - D.10 flue outlet flanged. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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