Section Code 1465 : Combination boilers and Water Jacketed Tube heaters. Low volume water content. Heat retained in water heaters will cause expansion of water after closure of draw-off taps and valves. Provision for expansion of water must be made to accommodate excess pressure within the system. Particular care is required where check valves are positioned, or loose jumper valves are thought to be upstream of the heater.
Back To Directory SectionsRange of floor-standing gas combination boilers, supplied with isolation valves, expansion vessel and a pressure relief valve set at 3.0 bar. Maximum working pressure: Primary circuit 2.5 bar, secondary 10 bar. Maximum operating temperature: Primary 82°C / secondary circuit 60°C.
Range of domestic stainless steel indirect unvented hot water storage cylinders, incorporating a stainless-steel coil for connection to external heating resource. The secondary circuit is factory fitted with a temperature and pressure relief valve (7.0 Bar @90°C) and an immersion heater. Primary working pressure: 3 bar; secondary working pressure: 5.5 bar. Maximum operating temperature 90 °C.
Range of electronically controlled heat interface units (HIU) with a stainless-steel plate heat exchanger providing space heating and instantaneous hot water. The domestic hot water (secondary) circuit incorporates a pressure relief valve (set at 10.0 bar). The inlets and outlets of all circuits incorporate a T-handled spherical valve. Maximum working pressures: 10.0 bar (Primary circuit), 9.5 Bar (Secondary circuit). Maximum operating temperature 95°C. Cold supply only.
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