By Frank Saxon
This is often the second one of 3 volumes of crucial reference for these interested in the install and servicing of family and commercial gasoline gear. This quantity bargains with some of the facets of putting in and servicing family home equipment and linked apparatus. The revised fourth version is introduced absolutely brand new with present criteria and the gasoline security (Installation & Use) laws to mirror contemporary advancements in undefined, in response to specifications of the ACS certificate of Competence and NVQs. The publication comprises new assurance of the newest versatile pipe paintings for family installations, additionally outlining new tactics for tightness checking out and purging. fresh sections handle fuel install in caravan and non-permanent dwellings, in addition to boats, yachts and different vessels, based on the Code of perform for family Butane and Propane fuel Burning Installations (BS EN 10239). protecting either usual fuel (low and medium pressure), and Liquefied Petroleum fuel, quantity 2 displays the recent divisions to the necessities for the deploy of household Sized gasoline Meters (BS 6400). The content material is additionally absolutely according to: * the newest development rules, limiting new vital heating structures to excessive potency condensing boilers. * The specification for set up and upkeep of family direct gas-fired tumble dryers. * half ''P'' of the construction rules for electric paintings on gasoline home equipment (Competent individual self-certification schemes, half P detailed destinations and kitchens 2005). * The set up, trade, disconnect, carrier, fix, breakdown and fee of household fuel fired variety cooker / sizzling water boilers. * The set up, trade, disconnect, carrier, fix, breakdown and fee of gasoline home equipment outfitted with compelled draught burners in household dwellings. Incorporating many illustrations and labored examples during the textual content, quantity 2 combines a concise reference with useful software in real-world engineering contexts to create a necessary guide for all features of the deploy and servicing of household gasoline home equipment, perfect for either scholars new to the sector in addition to pros and none-operational pros (e.g. Specifiers, Managers, Supervisors) as an ongoing resource of reference. * entire reference mixed with sensible software - an important instruction manual for gasoline provider know-how * totally up to date in keeping with the most recent adjustments to criteria, NVQs and ACS certificate of Competence * hundreds and hundreds of line drawings and pictures maximise accessibility of the textual content, permitting readers to simply understand the home equipment lower than dialogue
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Additional resources for Tolley's Domestic Gas Installation Practice: Gas Service Technology
There are, however, a number of flanged joints on appliances and control devices where the joint consists of two flat surfaces with a washer compressed between them. The mating surfaces are held together by screws or nuts and bolts. An example is shown in Fig. 14(a). Fig. 14 Flanged joint: (a) section through joint; (b) sequence of tightening bolts The sealing washers are usually made from rubber for water joints and materials such as cork or brass for gas. Flanges must be tightened down evenly to avoid strain.
Fig. 17 Method of installing flexible tube to a cooker Soft Soldered Joints Solder has been described in Vol. 1, Chapter 12. Soldering can only be carried out effectively if the metal surfaces are properly prepared, suitably fluxed, heated to the correct temperature and joined by an appropriate solder. The essential points to be noted are: 1. Surfaces All metals acquire a coating of oxide when exposed to the atmosphere. This must be cleaned off by scraping, filing or rubbing with clean steel wool.
Measure half the bending length on each side of the centre mark. For example, 15 mm copper tube is marked 20 mm on each side of the centre line, for a 30 set as shown. Bend between the marks until both bends are parallel, Fig. 30. Bending Copper Tube All manual bending calls for some measure of physical strength and this varies with individuals. Generally 6 and 8 mm tubes can be bent in the two hands, with the thumbs supporting the inside of the bend. 12 and 15 mm can be bent round the knee. To prevent injury, a leather knee-pad or a pad made of folded rag should be used.