SEALED SYSTEMS
should be installed in the cold-water supply before the water heater, ensuring that there are no other fittings or narrowing of pipework between the water heater and the valve. To comply with Water Regulations, valves should not be connected directly to a drain – the discharge should pass
flexible hose with union connectors, sealing washers and a ball-isolating valve with a four-bar pressure gauge. This can be pre- installed into the isolation valve, meaning that when isolated from the flexi loop and double-check valve attached to the mains, it is exposed to the system pressure in the heating circuit. The ALT-ST0035 has been designed to be installed in places engineers and homeowners can easily access without the need to disturb the boiler. This means that they can read the system pressure, check for pressure drop and, if needed, top up the system quickly. EXTRA PROTECTION WITH A SAFETY RELIEF VALVE Safety relief valves (or pressure relief valves) are typically used for controlling pressure on boilers in heating systems, on stored hot water cylinders in domestic hot water systems, and in water systems generally. When the calibrated pressure is reached, the valve opens and, by means of discharge in the atmosphere, prevents the pressure of the system from reaching levels which would be dangerous for the boiler and components in the system itself. INSTALLATION OF A SAFETY RELIEF VALVE In a sealed heating circuit, building regulations state that, where possible, a safety relief valve should be installed close to the heat source on the flow circuit. It
CA-900012.
through a visible tundish with an AUK3 air gap and be located adjacent to the safety relief valve, to allow vented water to escape. Furthermore, the discharge pipe must be the same size as the valve discharge outlet and must not be longer than two metres and have no more than two elbows. The safety relief valve should be located at a maximum distance of one metre from the boiler. To ensure that the safety relief valve remains fully operational and performing to its highest standard, it is important for the valve to be serviced annually.
Digital Pressure Gauge, PVADG.
The key components of an Altecnic Robokit Extra are: • Nitrogen-filled Reflex expansion vessel with five-year warranty • WRAS-approved ALT-ST0035 filling loop with gauge • WRAS-approved safety relief valve • Mounting bracket • Quattro four-way manifold fitting By providing the most high-quality products in a single kit, Altecnic makes converting open-vent systems to a sealed system easy. For more information, contact Chris Reilly, Country Manager for Ireland: T: +353 (0)85 215 2288 E: chris.reilly@altecnic.co.uk www.altecnic.co.uk
FINDING A COMPLETE SOLUTION
Altecnic makes converting from an open-vented to a sealed system of any size easy by packaging all the key components an installer needs into a handy Robokit Extra available from 8-80l capacity.
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