Section Code 1890 :
Back To Directory SectionsMcDonald Steel Flow ranges of Direct, Indirect, Solar Single, Solar Twin, Slim Direct and Slim Indirect stainless steel insulated unvented hot water storage cylinders with external expansion. The DHW circuit consists of a temperature and pressure relief valve set at 7.0 bar and 90°C, an inlet control group consisting of a pressure reducing valve adjustable between 2.7 and 3.3 bar, an expansion relief valve (SRV) set at 6.0 bar, a strainer and a check valve cartridge, verified by test (suitable for backflow protection against Fluid Category 2) also supplied with a tundish. Maximum supply pressure to the inlet control group 10.0 bar. Maximum working pressures - Primary circuit 6.0 bar, Secondary circuit 5.5 bar. Maximum operating temperature 65˚C.
Stainless steel indirect thermal store. The primary circuit is factory fitted with a temperature and pressure relief valve (3 bar and 92°C). Hot water storage for space heating via air to water heat pump Maximum working pressure: Primary circuit 3.0 bar Maximum operating temperature 85°C.
SSB, SSI SST range of stainless steel unvented cylinders provided with an unvented kit supplied with cylinders containing a temperature and pressure reducing valve set at 3.0 bar and an expansion vessel and single check valve (suitable for fluid category 2) . Available as storage tank, indirect or twin coil. Maximum working pressure of the cylinder 6.0 bar, maximum working pressure of the coil or coils 12.0 bar. Maximum operating temperature 95°C.
Range of domestic stainless steel indirect unvented hot water storage cylinder incorporating a stainless steel coil for connection to a heat pump circuit. The secondary circuit is factory fitted with a temperature and pressure relief valve (10 bar and 92°C) and an Incoloy immersion heater and magnesium sacrificial anode. Maximum working pressure: Secondary circuit 9.5 bar. Maximum operating temperature 95°C.
Range of indirect and direct unvented storage cylinders consisting of either no coil (GLE) or a factory fitted single (GLC) or twin coil (GLT). The secondary circuit is supplied with a temperature and pressure relief valve set at 7.0 bar@85˚C for 1.0-6.0 bar products and 10.5 bar@95°C for 6.0-10.0 bar products. The products are supplied with an inlet control group (safety kit) consisting of a pressure reducing valve, an expansion relief valve 6.0 bar (1.0-6.0 bar products) or 10.5 bar (6.0-10.0 bar products) and an approved check valve, however, the complete product has not been fully tested to demonstrate it provides backflow protection. Product is also supplied with an expansion vessel. Maximum working pressure 10.0 bar. Maximum operating temperature 85°C
Range of free standing direct gas fired unvented cyliners with a enamel coating internal lining and magnesium sacrificial anode. Fitted with a combined temperature and pressure relief valve set at 7 bar. Maximum working pressure 6.5 bar. Maximum operating temperature 80°C.
Range of domestic stainless steel indirect unvented hot water storage cylinder incorporating a stainless steel coil for connection to a heat pump circuit. The secondary circuit is factory fitted with a temperature and pressure relief valve (10 bar and 92°C) and an Incoloy immersion heater and magnesium sacrificial anode. Maximum working pressure: Secondary circuit 9.5 bar. Maximum operating temperature 95°C.
Mitsubishi EHWT17D-MHEDW indirectly heated stainless-steel unvented storage cylinder consisting of plate heat exchangers. The secondary circuit is factory fitted with a temperature and pressure relief valve set at 7.0 bar and 90˚C. A safety kit (manifold) consisting of an approved single check valve cartridge (verified by test as suitable for backflow protection against Fluid Category 2), strainer, a pressure relief valve set at 6.0 bar and pressure reducing valve set at 3.5 bar. The space heating circuit is factory fitted with a pressure relief valve fitted rated at 3.0 bar and an automatic air vent. A tundish, expansion vessel and filling loop are also supplied. Maximum secondary (wholesome) circuit working pressure: 5.5 bar. Maximum Space heating (primary) circuit working pressure: 2.5 bar. Maximum brine/ambient circuit working pressure: 9.5 bar. Maximum operating temperature 70°C
‘Comet’ combination units consisting of a cased and insulated stainless steel unvented hot water storage cylinder. The cylinder primary circuit is fitted with an in-line electrical heater which supplies the heat source to the secondary water via a stainless-steel coil, and the heat source to the central heating circuit directly. The cylinder is factory fitted with a temperature and pressure relief valve, pre-set at 7.0 bar 90 degrees. The unit is supplied with an inlet control group containing a check valve cartridge, verified by test (suitable for backflow protection against Fluid Category 2), pressure reducing valve set at 3.0 bar and an expansion relief set at 6.0 bar. An expansion vessel is factory fitted to both the secondary and primary circuits within and is positioned inside the casing. The primary circuit also incorporates a circulating pump and pressure relief valve which is set at 3.0 bar. Maximum secondary working pressure 5.5 Bar Maximum Primary working pressure 2.5 Bar Maximum operating temperature 65.0 °C
Range of “MEGAAIR” bubble top indirect and direct single coil unvented storage cylinders. The secondary circuit is factory fitted with a temperature and pressure relief valve set at 10.0 bar@90˚C. A safety kit (manifold) consisting of a single check valve assembly, verified by test (suitable for backflow prevention against fluid category 2), strainer, an expansion relief valve set at 8.0 bar and a pressure reducing valve set at 3.0 bar and a tundish is also provided. Alternative inlet control group and temperature and pressure relief valve added January 2023. Maximum working pressure: Secondary circuit: 7.5 bar. Primary circuit: 6.0 bar.
Non-metallic materials and components comply with BS6920 at 65°C
Page 2 of 6
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.
