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 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 a temporary filling loop which incorporates a combined isolation valve and double check valve assembly (suitable for backflow protection against Fluid Category 3), stainless steel braided EPDM lined flexible hose assembly and an isolation valve. The secondary circuit (DHW) incorporates a plastic flow restrictor The primary circuit incorporates isolation valves on the flow and return. Maximum working pressure of secondary circuit is 6.0 bar. Maximum working pressure of primary circuit is 2.5 bar. Maximum operating temperature 60°C. Cold water supply only.
Electronically controlled heat interface units (HIU) with twin stainless-steel plate heat exchangers providing space heating and instantaneous hot water. The cold inlet supply to the plate heat exchanger incorporates an isolation valve, in line single check valve assembly, (suitable for backflow protection against Fluid Category 2) and a water hammer arrestor. The space heating circuit incorporates an expansion vessel and a pressure relief valve (set at 3.0 bar). The product is supplied with a filling loop comprising of an in-line double check valve assembly (suitable for backflow protection against Fluid Category 3), which incorporates an isolation valve, a stainless-steel braided EPDM lined flexible hose assembly and an isolation valve. The inlet and outlet of all circuits incorporates lever operated spherical valves with brass bodies. Maximum working pressures and operating temperatures: Primary: 16.0 bar and 90˚C. Domestic hot water (DHW): 10.0 bar and 60˚C. Secondary (space heating): 2.5 bar and 90˚C.
Range of wall mounted combination boilers providing domestic hot water via a plate heat exchanger and pressurised central heating system. Incorporating a pressure relief valve and expansion vessel. Primary circuit has a maximum working pressure of 3.5 bar and operating temperature of 85°C. Secondary circuit has a maximum working pressure of 10.0 bar and operating temperature of 60°C.
RINNAI range of wall mounted combination boilers.The unit incorporates a stainless-steel plate heat exchanger pressure relief valve set at 3.0 bar and an expansion vessel on the primary circuit. Maximum working pressure of primary circuit is 2.5 bar and secondary circuit is 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, incorporating a pressure relief valve set at 3.0 bar and expansion vessel on the primary circuit. The inlet of the replenishing valve between the primary and secondary circuits incorporate a plastic strainer. Maximum working pressure 2.5 bar (primary) and 6.0 bar (secondary). Maximum operating temperature 85˚C.
LCB700 range of internal and external oil-fired condensing combination boilers providing domestic hot water and pressurised central heating via a plate heat exchanger. The products are supplied with a temporary filling loop which incorporates a combined isolation valve and double check valve assembly (suitable for backflow protection against Fluid Category 3), stainless steel braided EPDM lined flexible hose assembly and an isolation valve. The primary (space heating) circuit incorporates an expansion vessel and a pressure relief valve (set at 3.0 bar). Operating parameters: Primary (space heating) circuit: Maximum working pressure 2.5 Bar. Maximum operating temperature 105°C. Secondary (DHW) circuit: Maximum working pressure 10.0 Bar. Maximum operating temperature 85°C.
Range of heat interface units (HIU) with either twin or single stainless steel copper brazed plate heat exchangers (depending on model) providing heating and hot water (twin unit) hot water only, or heating only. The hot water is generated via a plate heat exchanger. The primary (space heating) circuit incorporates an expansion vessel and a pressure relief valve (set at 3.0 bar). The product incorporates a CAb backflow prevention device (suitable for backflow protection against Fluid Category 3) for filling the heating circuit. The inlet and outlet of all circuits incorporate a lever operated spherical valve. Maximum working pressures and operating temperatures: Primary (district heating): 10.0 bar and 85˚C. Domestic hot water (DHW): 10.0 bar and 60˚C. Secondary (space heating): 2.5 bar and 80˚C.
Ranges of wall hung, gas-fired condensing combination boilers providing domestic hot water via a plate heat exchanger and pressurised central heating system incorporating an expansion vessel and pressure relief valve set at 3.0 bar. The supplies to both domestic hot water and primary are controlled via spherical valves. Products are supplied with a rigid filling loop or keyless filling link. Maximum working pressure of the primary circuit is 2.5 bar & maximum supply pressure of the secondary circuit is 8.0 bar. Cold water supply only. Maximum operating temperature 95°C.
Range of wall hung, gas-fired condensing combination boilers providing domestic hot water via a plate heat exchanger. The pressurised central heating system incorporates an expansion vessel and pressure relief valve set at 3.0 bar. The supplies to both domestic hot water and primary are controlled via spherical valves. The primary circuit has a maximum working pressure of 2.5 bar. The secondary circuit has maximum working pressure of 10.0 bar. Maximum supply temperature is 60°C. Maximum operating temperature of secondary circuit is 85°C.
Range of floor standing gas fired combination boilers providing domestic hot water via a stainless-steel plate heat exchanger. Unit is supplied with a safety relief valve (8.0 bar). Maximum working pressure 7.5 bar. Maximum operating temperature 85°C.
Page 2 of 4
We use cookies to give you the best possible experience with WRAS. Some are essential to provide website functions and ensure the website is secure. We also use cookies to help us understand how people use the site and to make improvements. Click "Accept All" to enable recommended settings or click "Manage cookies" to adjust your settings. For more details, see our Cookie Policy.
