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 wall mounted combination boilers providing domestic hot water via a heat exchanger and pressurised central heating system. The products can be supplied with a rigid or flexible filling loop or keyless filling link. The flexible and rigid filling loops incorporate a flexible hose or copper pipe, isolation valve, double check valve assembly (suitable for back flow protection against fluid category 3). The keyless filling link incorporates a CAB backflow prevention device (suitable for back flow protection against fluid category 3). The products also incorporate an expansion vessel and pressure relief valve set at 3.0 bar. Maximum working pressure of primary circuit 2.5 bar. Maximum operating temperature of primary circuit 85°C Maximum working pressure of secondary circuit 8.0 bar Maximum operating temperature of secondary circuit 60°C
‘SATK 32’ range of indirect heat interface units providing instantaneous hot water. Domestic hot water is provided via a plate heat exchanger and this circuit incorporates a flow detector, stainless-steel filter and water hammer arrestor. The primary/space heating circuit incorporates a pressure relief valve set at 2.5 bar and an expansion vessel. Maximum working pressure of the domestic hot water circuit is 10.0 bar. Maximum working pressure of the primary circuit is 16.0 bar. Maximum working pressure of the space heating circuit is 2.5 bar. Maximum operating temperature 90°C.
Non-metallic materials and components comply with BS6920 at 85°C
Range of wall mounted, gas-fired condensing combination boilers providing domestic hot water via a plate heat exchanger and pressurised central heating system incorporating an expansion vessel, pressure relief valve set at 3.0 bar and flow regulators. The inlets to both domestic hot water and primary circuits are controlled via screwdriver operated angled spherical valve. The primary circuit can be filled via a built in CAB device, that has been verified by test (suitable for backflow protection against Fluid Category 3). Primary circuit: Maximum working pressure 2.5 bar. Maximum operating temperature 80°C. Secondary circuit: Maximum working pressure 10.0 bar. Maximum operating temperature 60°C.
Range of wall mounted combination boilers providing domestic hot water via a plate heat exchanger and pressurised central heating system. The primary circuit incorporates a pressure relief valve set at 3.0 bar and an expansion vessel. The secondary circuit (DHW) incorporates a plastic flow restrictor and stainless-steel filter. The primary and secondary circuit incorporates isolation valves on the flow and the primary also has one on the return. Maximum working pressures: Secondary DHW: 10.0 Bar Primary CH: 2.5 Bar Maximum operating temperatures: Secondary DHW: 65.0°C Primary CH: 85.0°C
Range of wall mounted combination boilers providing domestic hot water via a plate heat exchanger and pressurised central heating system. The primary circuit incorporates a pressure relief valve set at 3.0 bar and an expansion vessel. The products are supplied with isolation valve on both the DHW and CH circuits. The secondary circuit (DHW) incorporates a plastic flow restrictor and stainless-steel strainer. Some models (see model section) are supplied with a filling loop assembly consisting of an in-line isolation valve, an in-line double check valve assembly which incorporates an isolation valve. Maximum working pressures: DHW: 10.0 Bar CH: 2.5 Bar Maximum operating temperature: DHW: 65.0°C CH: 85.0°C
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