Recent content by rickyspeak

I've dug a bit through the forums and I haven't seen anybody address this question. What is the ideal range duty cycle for using PIDs to run typical gas furnace valves like the Honeywell VR8200? How long is too long causing oscillating temperatures and what is too fast causing damage to you're...

I don't use that type of system, but yes, you would need an ignition control for each valve.

I guess I wasn't clear. Yes, I mean glucose. C6H12O6 -> 2 C2H5OH + 2 CO2 + 235 kJ/mol Sucrose is: C12H22O11 + H2O -> 4 C2H5OH + 4 CO2 + 425 kJ/mol You can do any other sugar you want and get similar calculations. Glucose seems to have the highest energy density at ~1.3 kJ/g. So...

I know I'm raising a zombie here, but since I've been going over this problem over and over again for a peltier build I thought I'd share with people what I think is a better answer to this question. Gibbs free energy of fermentation is actually -235 kJ/mol. Almost all of the energy will be...

My safety concern is that there is no test for failed ignition in this setup. It is possible to have a situation where gas is pouring out of your burner and you're not getting ignition because of a strong wind. That would obviously be a very bad circumstance. It's my impression that HSI is...

While impatiently waiting for a reply I did manage to uncover this document detailing a huge amount of what people want to know about gas valves. So, I thought I'd share. http://www.invensyscontrols.com/spaw2/SiteContent/Training%20HEATING%20GAS%20VALVE%20SYSTEMS_1.pdf The important...

Hey de3isit. I saw your post with your setup on a different thread and I was confused about what pressure you were running into your Honeywell valves. Are you saying you can run high pressure (10-30 PSI) into your Honeywell valves and you get 11"WC coming out of them? I'm sure I'm...

Awesome thread guys. Hopefully somebody can help me figure out what I'm doing wrong. I'm trying to setup an all 11"WC LP gas setup because I'm planning to do a Honeywell valve temperature controlled system. So far I've had countless problems with burners and gas flow and I'm a bit of a loss...

If you really want to use a thermowell, you can get a replacement probe. Supposedly they are are using a NTC 10KOhm @ 25C, 3435 Beta probe. http://www.thehomebrewforum.co.uk/viewtopic.php?f=23&t=20318 You can get a replacement probe that can slide into a >5mm thermowell pretty easily...

I wasn't trying to imply that it was entirely safe. Even manual ignition isn't safe. I know I've had more than one time where I was fumbling with a blown out lighter and gotten a small boom. It definitely would be a nice added feature to a standing pilot setup to protect from blowouts...

Great find reynolds5520. I couldn't find a manual anywhere. That answers all my questions. Basically this item has the same ignition functionality that the Blichmann Tower of Power provides (plus a solenoid valve of course). I'd say it's a little less safe than a standing/intermittent pilot...

I stumbled across this the other day and I was wondering what the various experts out there had to say about the Robertshaw 785-001 as an alternative direct spark ignitor. Obviously it is less safe than a Honeywell ignition control module, but it seems like a good alternative for those who are...

I don't want to sound like a dick picking a fight I'm just curious how you came to this answer. Do you have a citation or reference for that 225% number or is it just a standard that you like to use?

Lucky you, I bet you get the pro discount too. I finally found at least one decent source I thought I'd share for people. http://www.auberins.com/index.php?main_page=index&cPath=2_31. These are definitely cheaper to than the special purpose (aka proprietary-ware) HVAC contactors. They also...

Hey 501irishred, what was your source for contactors. I've looked around on the webz and I can never seem to find what I need for a good price.