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Sailor and photographer Tony Probst has visited Pitcairn four times since 2011, and natives have dubbed him the island’s ambassador. Jacqui Christian, 7th generation descendant of the Bounty, takes a moment to pause on a narrow path called Down Rope. Pitcairn does have a somewhat dark stain on its history — In 2004, seven of the island’s male residents were found guilty of various sexual offenses.
Pitcairn residents get all of their electricity powered through the generator pictured here.
Most islanders make use of all the fresh fish surrounding their home, but there are some islanders who don’t eat seafood for religious reasons.
As the island is extremely isolated and with no hospital, residents must travel to New Zealand for major medical treatment and can’t return for another 3 months. Islanders told me their favorite thing about living on Pitcairn was being able to view the stunning sunsets and sunrises from any point on the island. Around 20 miles away, Probst took this picture of Pitcairn outlined in the moonlight and Venus. In 1838, the Pitcairn Islands officially became a British territory, and today all of its residents are descendants of those original mutineers. The scandal involves most of the Pitcairn’s residents, including then mayor Steve Christian. Probst has taken photos of headstones and calculated that most people on Pitcairn live to about 90 years. Islanders rely on these shipments because everything from candy to clothing must be shipped in from New Zealand.
To avoid this, designers use a gas safety valve that does not open until ignition is assured. Different manufacturers have designed different methods of keeping the gas safety valve closed until ignition is guaranteed.
It is important to know which you are dealing with, because many of the valves look the same. How did we do?"A A "What are your thoughts on these new ways of; 'All-Green', All-Sustainable', and 'All-Climate' Community Living Styles? If you try to test a low voltage valve by putting high voltage across it, you will burn it out. Do not confuse the oven gas thermostat valve with the safety valve.
The oven gas thermostat valve is a valve you set by hand (the oven temperature knob) to control the oven temperature. In some types of systems, the thermostat is not a valve at all; it is an electrical switch that opens or closes based on the oven temperature it senses. The gassafety valve, on the other hand, simply prevents gas from flowing to the burner until ignition is guaranteed. In systems with an electrical thermostat, the safety valve opens and closes to cycle the burner on and off, but it still will not open if there is no ignition. The nice thing about gas ovens is that there aren't a whole lot of moving parts, so wear and tear is a relatively minor consideration. The sensing element sits right in the pilot flame. Just exactly where the sensor sits in the pilot flame is important. All that's needed is a safety valve that will sense this tiny voltage and open the valve if it is present. To test, turn it on and test for continuity. Try cleaning the pilot orifice and pilot generator as described in section 6-5 and adjusting it a little higher. The pilot generator needs to be sitting right in the hottest part of the flame as described in section 6-2. If that doesn't work, we have a minor dilemma in determining whether the problem is the pilot generator or the safety valve.


The dilemma here is that the voltages are too small to be measured with standard equipment. And the safety valve, which is usually the problem, costs twice as much as the pilot generator. What I recommend is just to replace the gas valve first; that usually will solve the problem. Any tighter than that and you can damage the electrical contacts on the valve. 6-2 (b) CAPILLARY PILOT SYSTEMSIn some systems the sensor is a liquid-filled bulb, with a capillary to the safety valve or flame switch. When the liquid inside heats up, it expands and exerts pressure on a diaphragm, which opens the valve or closes the switch. It is important to know that these sensor bulbs do not cycle the burner on and off to maintain oven temperature.
If the pilot is out, the flame switch does not close and the 110 volt heating circuit is not complete, so the safety valve will not open. In hydraulic capillary systems, hydraulic pressure from the capillary physically opens the gas safety valve.
Gas for the primary pilot may come from either the thermostat or directly from the gas manifold. When the thermostat valve is turned on, the pilot flame gets bigger, heating the sensor bulb, which activates the safety valve (hydraulically) and the burner ignites. Gas for the secondary pilot comes from the oven thermostat itself. When the oven reaches the correct temperature setting, the thermostat drops the pilot flame back to the lower level, the safety valve closes and the burner shuts off.
If you don't have a good strong pilot (secondary pilot, in two-level systems) that engulfs the pilot sensing bulb with flame, try cleaning the pilot assembly and sensor bulb as described in section 6-5. If it is a safety valve replace that. In a two-level pilot system, remember that the main oven thermostat supplies the secondary pilot with gas. So if you cannot get a good secondary pilot the problem may be the pilot assembly, or it may be the thermostat.
The spark module is an electronic device that produces 2-4 high-voltage electrical pulses per second. These pulses are at very low amperage, measured in milliamps, so the risk of shock is virtually nil.
The spark ignition module is usually located either under the cooktop or inside the back of the stove. The same module is used for both the surface burner ignition and the oven burner ignition. However, the spark is not certain enough to light the oven burner, and the gas flow is too high, to rely on the spark alone. These are the same switches as shown in section 5-3.The flame is positioned between the spark electrode and its target.
So when the pilot flame is burning, electricity from the spark electrode is drained off to ground, and sparking stops. Spark ignition, a pilot, a flame switch and TWO - count 'em - TWO safety valves; one for the pilot and one for the burner.
When you turn on the oven thermostat, a cam on the thermostat hub closes the pilot valve switch. This opens the 110 volt pilot safety valve and energizes the spark module, igniting the pilot. As in the other spark system, the pilot flame provides a path that drains off the spark current, so the ignitor stops sparking while the pilot is lit.
As long as the oven thermostat is turned on, the pilot valve switch stays closed, so the pilot valve stays open and the pilot stays lit. When the pilot heats the pilot sensing element of the flame switch, the flame switch closes. Is there sparking after the thermostat is shut off? IF SPARKING OCCURS(The pilot may or may not light, but the main burner is not lighting) Remember that the thermostat supplies the pilot with gas in these ovens, and only when the thermostat is on. So if you don't have a primary and secondary pilot flame, odds are the problem is the pilot orifice or oven thermostat. If that doesn't work, replace the pilot assembly. If you do have a good strong secondary pilot that engulfs the pilot sensing bulb with flame, then odds are that the oven safety valve (or flame switch, whichever is attached to the pilot sensing bulb in your system) is defective.
Replace the defective component.IF SPARKING DOES NOT OCCURSomething is wrong with the high-voltage sparking system.


If you are in a hurry to use your oven, you can turn on the oven thermostat, carefully ignite the primary pilot with a match and use the oven for now; but remember that the minute you turn off the thermostat, the pilot goes out. Are the cooktop ignitors sparking? What typically goes wrong with the sparking system is that the rotary switch on the valve stops working. If the switch does not test defective, replace the spark module. Remember that these switches are on 110 volt circuits.
If you get too fast and loose with pulling these leads off to test them, you might zap yourself.6-4 GLOW-BAR IGNITIONA glow-bar ignitor is simply a 110 volt heating element that glows yellow-hot, well more than hot enough to ignite the gas when the gas touches it. It is wired in series with the oven safety valve. When two electrical components are wired in series, they share the voltage (see figure 6-I) according to how much resistance they have. If the ignitor has, say, two-thirds of the resistance of the entire circuit, it will get two-thirds of the voltage.
So unlike the flame safety switch system (which has a safety valve that looks almost exactly like this one,) this safety valve is a low voltage valve. Let's talk about honey for a minute. When the ignitor heats up, the resistance drops, and electricity is able to flow through it more easily, and the voltage across it drops. Now apply that fact to what we just said about the ignitor and gas valve splitting the voltage. When the ignitor is cold, its resistance is high, and it gets most of the voltage. So much, in fact, that there isn't enough voltage left to open the safety valve. When the ignitor heats up, the resistance drops, the safety valve gets more voltage, and bingo! Usually the fuse is located down near the safety valve, but in some installations it's under the cooktop or inside the console.
If the ignitor gets old and weak, it will still glow, but usually only red- or orange-hot, not yellow-hot.
It can throw you; since you see the ignitor working, you think the problem is the safety valve. And electrical parts are non-returnable. When diagnosing these systems, I recommend replacing the ignitor first. And over a long long period of time this ash can build up and clog tiny gas orifices, like pilot orifices. In an oven, it usually also means that the pilot will not get hot enough to open the safety valve, and the burner will not light. Or the ash might build up on the pilot sensing bulb, and insulate it enough that the safety valve operates intermittently or not at all.You can usually clean them out with an old toothbrush and some compressed air, but pilot orifices are generally so inexpensive that it's cheaper and safer to just replace them. If you choose to clean them out, use a soft-bristle brush like a toothbrush, and not a wire brush; a wire brush might damage the orifice. All that's needed is a safety valve that will sense this tiny voltage and open the valve if it is present. If you don't have a good strong pilot (secondary pilot, in two-level systems) that engulfs the pilot sensing bulb with flame, try cleaning the pilot assembly and sensor bulb as described in section 6-5. When the oven thermostat is on, and there isn't a pilot flame, is the electrode sparking? So if you don't have a primary and secondary pilot flame, odds are the problem is the pilot orifice or oven thermostat. Usually the fuse is located down near the safety valve, but in some installations it's under the cooktop or inside the console. If you do have any crusty stuff from accidental contact with food, clean as described in section 5-4.?Copyright 2011 GOFAR Services, LLC.



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