Stumped on Burnham 204PV

Bill Lawson

Did an install today on a Burnham 204PV. PV blower turns on, trial for ignition, proves ignition, burners light on low, as soon as valve opens to high fire boiler shuts down and ignition module recycles. Checked pilot - clean and stable, gas pressure 5 in 3.5 out. New Z-vent with no obstructions and nice short run. Flame looks good on burners. Good ground to burners. Pressure switch appears good and pulls right in when blower turns on, even cut back a 1/2 inch or so on each end of the tubing - just to be sure it wasnt stretched or something. Honeywell S8670 Module and Honeywell VR8204 gas valve. I am thinking either bad gas valve or ignition module. Any ideas? Fortunately there was no heat before so customer can live with one more day without heat (converted summer cottage now occupied by Air Force Colonel activated for Iraqi. cottage is right near the base so she doesnt have to commute 2 hours each day) This one has me stumped and I normally dont get stumped too easily - Guess it is my time to have my cocky pride put in check! Hoping maybe one of you fellers has run across this problem before. Thanks in advance for any input you may have!

Unknown

Bill

Just curious! What happens to the 3.5" wc at the manifold just before this shuts down? In addition to that what happens to the 5" wc incoming just before shutdown? The incoming pressures for Natural Gas on this model are 4.5" wc minimum to 14" wc maximum. The 5" wc you mentioned is real close to the minimums. I generally like to see about 7" wc incoming to help provide consistent pressures when other appliances are running.

Give our tech services guys a call in the morning when you get back there. The number is 1-800-722-0720. Jon, Randy or Dave will stick with you on this one until you can make some sense of it. It does, however, have all of the signs of low gas pressure dropout. How do I know that? Because I used to man the phones in Tech Services for a few years. Hope this helps.

Glenn Stanton

Manager of Training

Burnham Hydronics

Bill Lawson

Thanks Glenn. I will give a call in the morning. I was beginning to think that this might have been a part of the problem. You guys at Burnham are the best, when I came down last year for a Power Flame Class it was "Good and Plenty".......Food and Education! Now a response at 10:30 at night - what more could you ask for!