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The Honeywell SF450EN Carbon Monoxide Detector is a highly reliable and accurate CO Detector for domestic use within the home, caravan or boat. The SF450EN uses the latest in electro-chemical sensor technology to ensure reliablity and is guaranteed to provide 6 years of life, under normal working conditions. Also the SF450EN Carbon Monoxide Detector is officially aprroved and kite marked to the stringent preformance requirements of the European Standard EN50291:2001.
The Worcester Twin Channel Digital Programmer is compatible with the Danesmoor wall mounted and florr standing oil boiler ranges only. It is designed to allow the user to set two different times for the central heating and hot water and these two times can be different for every day of the week. Also the times for the central heating and hot water can also be programmed separately to come on at different times providing flexibility and comfort for the user. The Worcester Twin Channel Digital Programmer features an innovative holiday function allowing the user to suspend normal heating and hot water times while the owners are away and resume when they return.
At Boilers2go we recommend the Worcester Twin Channel Digital Programmer for Woresters Oil Boiler ranges for its highly flexibile central heating and hot water time controls and innovative holiday function. The Programmer is also simple to install easily plugging into a pre-prepared socket in the compatible oil boiler ranges making installation and set up simple and quick.
In a closed central heating system water cannot be compressed so any increase in the volume, created by an increase in temperature, needs to be accomodated. This is done with the use of an expansion vessel, when the water in the system is cold the pre-charge pressure of the system forces a diaphram in the expansion vessel against the tank towards the inlet. As the temperature increases the expanding water volume pushes against the diaphragm creating additional volume for the water to enter the expansion vessel. As the temperature decreases the pre-charge pressure forces the water from the expansion vessel back into the central heating system. This maintains a constant pressure within the central heating system and helps to reduce energy and water consumption.