Troubleshooting Tips | Portable Dryer Troubleshooting | |
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soon as the burner is turned on. The vaporizer must be adjusted to solve this problem.
Using
Fan | Fan |
Fan | Fan |
Fan | Fan |
Remember that each of these input terminals is part of the main safety circuit of the dryer, and each must have 12 volts DC on it before the dryer will operate.
Vapor High Limit Hints
1.Anytime you adjust the Vapor High you should wait and be sure that the pipe train temperature stays constant. It may slowly allow the pipe train to get hotter or colder the longer the dryer runs.
2.If a dryer is shutting down constantly from a Vapor High Limit, it may also be caused from a gas line that is exposed to direct sunlight. If the fuel line to the dryer is exposed to direct sunlight, the liquid in the line will start to vaporize before it even gets to the dryer. Then, when it runs through the vaporizer it gets too hot and causes a shutdown (no matter where you try and adjust the vaporizer). This prob- lem can be helped by insulating the gas line from outside heat.
3.In extreme cases the vaporizer may have to be changed before it will run the proper temperature. Example: If a dryer has a burner with a three wrap vaporizer and the dryer is located in the southern United States, you may have problems adjusting thevaporizer far enough from the flame. In this case, you may have to install a two wrap vaporizer.
The two wrap has less surface area and it will not heat the LP quite as much. This may also be true in colder climates where a two wrap will not heat up enough. In this case, the pipe train may develop frost or even freeze the solenoids open.
4.The Vapor High Limit is an automatic reset safety device. It will reset itself as soon as its temperature drops below 190° F. Be- cause the pipe train of the burner cools down rapidly when there is a dryer shut down, the Vapor High Limit will generally be cool before the operator gets back to the dryer. As soon as he hits the stop button to reset the computer, it comes back up to normal operation. It appears that the dryer is shutting down for no apparent reason. Usually if this happens the dryer will shut down again a short while after restarting the dryer.
5.If the LP tank feeding the dryer is getting very low on fuel, it can also cause the dryer to shutdown on a Vapor High Limit. Before adjusting the vaporizer always check the fuel level in the customers tank. If the fuel pressure is very low, try suggest ing that the tank be refilled. Usually this will solve the problem.
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