Gas-flow control procedure for gas space-heater

摘要

The control procedure involves the regulation by a microprocessor of gas flow in relation to gas temperature, energy content, entry pressure and barometric pressure. When the energy content of the gas is high, the gas flow is decreased, whereas it is increased with an increase in the temperature. The heater comprises a fan heater (54) with a fan (66) driven by a variable speed motor (67). A permanent magnet valve (56) is included in the gas supply to the heater, and controlled in accordance with the values measured in the manifold (48)