Grant Engineering

Grant Dual Coil Solar Copper Cylinder

Copper unvented indirect solar dual coil hot water cylinders for renewable applications, that can be pressurised up to ‘2 bar’. Suitable for private well, bore hole, or mains water supply.

Versitile solutions
The copper dual coil range of hot water cylinders were developed to meet the growing demand for systems that combine a renewable heat source with a standard oil, gas, biomass or electric boiler, and are particularly suitable for use with a solar hot water system, like the Grant Solar Thermal. When correctly installed this arrangement can significantly reduce the dependence on traditional fossil fuels resulting in lower energy bills.
Sizes range from 200 litres to 500 litres, comprising five indirect models which can meet the needs of even the largest of domestic properties.

Design specifications
Two primary connections – the new copper cylinders have two coils for connection to primary heat sources. The renewable heat supply should be connected to the bottom coil, which is designed to preheat or heat the surrounding water, depending on temperature of the incoming supply. The central heating boiler connection should be made to the top coil. The boiler will only operate if the water in the cylinder has not reached the devices pre set temperature and the boiler/cylinder controls are installed correctly.
Featuring high efficiency heating coils, the Grant Copper Range is developed to ensure a maximum transfer of the energy collected by renewable systems, and is perfect for technology such as Grant Solar Thermal.
Indirect cylinders are heated from oil, gas, biomass or electric boilers, but provided with a second high performance coil which is linked with a renewable heat source, like solar thermal. As a safety feature, indirect copper cylinders are supplied with a control/high limit thermal cut out that operates at 90 degrees C.

Components supplied
Grant Copper dual coil cylinder includes, a factory fitted T & P valve set to operate at 4 bar and 90 deg C and a 3 kW immersion heater.

They are also supplied with an installation kit comprising:
1 x Expansion vessel, hose and bracket
1 x 15mm/22mm Tundish
1 x 2 bar inlet manifold assembly
1 x Installation and user instruction manual
1 x Dual Stat
1 x Motorized valve
1 x Drain Cock