Hayward HD100ID1 ignition problem?????


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Old 05-08-08, 05:28 PM
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Hayward HD100ID1 ignition problem?????

I see that you have helped a vew people on the Hayard HD100ID1 - Propane. I resently installed on my new hottub. I have electrical correct. When I turn the thermistat the fan starts - 5 sec. later hear the ignitor, cycles 3 times the stops. I'm pretty sure that the problem is gas flow or pressure. It is connected to a small propane tank with a 10 psi regulator. From the research i've done - that would equal about 11" W.C. - which is in range. Any suggestions????????
 
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Old 05-08-08, 05:50 PM
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When you say small tank, how small? If it is a gas grill tank it will not work. Heater is 100,000btu and grills 20,000 - 40,000 most of them.
 
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Old 05-08-08, 05:55 PM
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It is about 2 times that size. Can't remember exacts on specs of tank.
 
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Old 05-08-08, 06:04 PM
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Todrut is correct, actually the size of the piping from the tank to the heater is more critical , you may have enough pressure , however what you may be lacking is volume.


steve
 
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Old 05-08-08, 06:07 PM
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I saw in the book about the pipe sizes and that is cool - 1/2 inch pipe tank about 15 feet from heater. What size would the tank need to be?
 
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Old 05-08-08, 06:08 PM
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Too small, it takes a much bigger tank to be able to change from liquid to gas and feed heater. A 75 - 100 gal tank be work.
 
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Old 05-08-08, 06:11 PM
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Cool - Thanks guys!!!! That's why we go to the experts.
 
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Old 05-10-08, 11:11 AM
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In addition to the tank size you have a serious issue with your pressure. 10PSI is way too much pressure. 11 inches w.c. is approx 1/2 psi.

In the owners manual it has two different set ups for the gas piping. There is a single stage system which utilizes 11 inches wc right from the tank and a two stage system which utilizes 10 psi from the tank to a second stage regulator which will drop it down to 11 inches w.c.

There is likely a maximum inlet pressure on the spec plate of the heater which should be 13 inches w.c. Anything more than that can damage the gas control valve and void warranty.
 
 

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