This valve assembly is probably the most important component of the gas burner assembly. The valve assembly controls the flow of gas to the main burner from the gas supply line.
Cycling thermostats are bi-metal devices or thermo-discs that are designed to cut the main burner OFF when a pre-determined temperature has been attained in the dryer drum. There is no adjustment of the temperature response of these thermostats. Read the rest of this entry »
Next, check the dryer cycling thermostats as the possible cause for no heat in the dryer. The types of thermostats most commonly used in dryers (gas or electric), are the bimetal fixedand adjustable thermostats. Their primary function is to break the circuit to the gas main burner or the heating element when a certain temperature has been attained in the dryer drum. You can easily check these thermostats by removing one lead from the suspected thermostat. Set the volt/ohmmeter on the RX-1 scale. Place one probe of the volt/- ohmmeter on each terminal of the thermostat. You should see a continuity reading on the volt/- ohmmeter scale of approximately 0 ohms, or full- meter deflection. If the thermostat does not show continuity, replace the defective thermostat to restore the dryer to proper operating order. Read the rest of this entry »
The amount of light given out or produced by an electric lamp — bulb, striplight or fluorescent tube — depends on the type of lamp and its wattage. The light produced is measured in lumens and a bulb or tube of a given wattage produces an average output of so many lumens. This will continue throughout most of its life.
Equally important is the number of lumens produced for each watt consumed, so it is usual to say, when comparing types, that a bulb or tube produces so many lumens per watt. The more the lumens per watt, the higher the efficiency of the lamp. Read the rest of this entry »
Small table cookers and other portable appliances having individual loadings not in excess of 3 kW are run off 13 A fused plugs and socket-outlets. They require no special wiring though extra socket-outlets may be needed in the kitchen when additional electrical cooking appliances are bought. These additional socket-outlets may be served from the ring circuit and spurs.
Family-size cookers, whether free-standing or built-in split-level, need an exclusive circuit from a fuseway of appropriate current rating. Read the rest of this entry »
These have a similar motor to the vacuum cleaner; the most common fault being brush wear. Burning out of the windings is also fairly frequent and is usually caused by overloading due to misuse.
The popular low-priced rotary mowers are usually powered by a brush motor similar to that of an electric drill (power tool). Carbon brushes need replacing when they wear but the component which is likely to give the greatest concern is the thermal cutout usually situated in the handle. The function of this is to cut off the current to the motor when there is a risk of overload when cutting very long grass. Read the rest of this entry »
Portable electric heaters and many fixed electric heaters are controlled by a switch or switches mounted on the frame of the heater. In addition, the heater is switched at a switched socket-outlet or switched fused connection unit or is connected to a non-switched socket-outlet which means pulling out the plug to switch off the heater.
Wall panel heaters, oil filled radiators, convectors and other heaters operating at ‘black heat’ have an integral thermostat which is set to the required room temperature. Read the rest of this entry »
Take particular care in the bathroom where special regulations apply.
Do not install a socket-outlet in the bathroom other than an approved shaver supply unit for a mains voltage shaver.
Do not make provision for using a mains voltage portable appliance. For example do not run a portable electric heater from a socket-outlet situated outside the bathroom i.e. on the landing or in an adjacent bedroom. If the tank cupboard opens into the bathroom and the tank has an immersion heater do not supply it from a socket-outlet (not a good method in any case) which could be used for plugging in a portable appliance. Read the rest of this entry »
Most, if not all, people know that mains electricity in the home is lethal. This means that if you come into contact with a live terminal, live wire or metalwork, which because of a fault is charged with electricity, you will receive an electric shock which could be fatal.
Electricity at the mains voltage of 240 V is present at every ceiling rose, lampholder, switch, socket outlet and other outlets. It is also present at every electrical appliance connected to the mains when plugged into a socket outlet and the switched socket is ‘ON’. Read the rest of this entry »
