{"id":1193,"date":"2020-03-10T14:59:33","date_gmt":"2020-03-10T14:59:33","guid":{"rendered":"https:\/\/www.thepyroscope.com\/blog\/?p=1193"},"modified":"2020-03-12T21:54:15","modified_gmt":"2020-03-12T21:54:15","slug":"combustion-tuning-a-parallel-positioning-system","status":"publish","type":"post","link":"https:\/\/www.thepyroscope.com\/blog\/combustion-tuning-a-parallel-positioning-system\/","title":{"rendered":"Combustion Tuning a Parallel Positioning System"},"content":{"rendered":"\n<p><em>-Dan Wallace, PE<\/em><\/p>\n\n\n\n<p>Follow these best practices to tune a Natural Gas burner.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"alignleft size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.thepyroscope.com\/blog\/wp-content\/uploads\/2014\/08\/large-psd.gif\" alt=\"\" class=\"wp-image-240\" width=\"355\" height=\"181\"\/><\/figure><\/div>\n\n\n\n<p>1. Check the burner nameplate for the required gas pressure\nat the manifold at high fire. <\/p>\n\n\n\n<p>2. Check the burner nameplate for the required supply\npressure. <\/p>\n\n\n\n<p>3. Light the burner off, and adjust the main gas pressure\nregulator until the desired supply pressure is obtained. It is important to do\nthis while the burner is running not when the burner is off. <\/p>\n\n\n\n<p>4. After the boiler is warm, store rough curve points going\nup in firing rate until high fire is reached. <\/p>\n\n\n\n<p>5. Now, begin decreasing the firing rate and store more\npoints on the way down in firing rate while overriding the rough points that\nwere stored on the way up. Why is this important? A curve point is generally\nmost fuel rich on the way down in firing rate so storing points on the way down\nwill ensure an appropriate O2 value is stored that will also allow the burner\nto have enough air on the way up in firing rate. <\/p>\n\n\n\n<p>6. Make sure no points are stored at \u201c0\u201d position. There are end effects for electronics, etc. So, it\u2019s best to store values at 1.0 degree or higher. <\/p>\n\n\n\n<p>7. Make sure the deadband setpoint in the controller for\nservos is set above the inherent deadband of the servo manufacturer. Otherwise,\nthere will be nuisance lockouts! <\/p>\n\n\n\n<p>8. Check the flame appearance at each curve points to ensure\nstability and flame fit in the furnace. <\/p>\n\n\n\n<p>9. Check to make sure the emissions are below the required\nthreshold at each curve point. <\/p>\n\n\n\n<p>10. Lastly, but very importantly, consult the burner and\ncontrols manuals for proper setup before engaging in a combustion startup. <\/p>\n\n\n\n<p>11. When a flowmeter is not present, remember that pressure varies by the square of flow so gas flow rate can be approximated by the following formula: Flow Rate = Sqrt(Current Pressure at Manifold \/ Manifold Pressure at High Fire) * High Fire Flow Rate.<\/p>\n\n\n\n<p><strong>Dan Wallace, PE <\/strong>is the Vice President of Research and Development at Preferred Utilities Manufacturing Corporation in Danbury, CT, and has been with the company for over 10 years. <\/p>\n","protected":false},"excerpt":{"rendered":"<p>-Dan Wallace, PE Follow these best practices to tune a Natural Gas burner. 1. Check the burner nameplate for the required gas pressure at the manifold at high fire. 2. Check the burner nameplate for the required supply pressure. 3. Light the burner off, and adjust the main gas pressure regulator until the desired supply pressure is obtained. [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":1201,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"content-type":"","footnotes":""},"categories":[1],"tags":[35],"_links":{"self":[{"href":"https:\/\/www.thepyroscope.com\/blog\/wp-json\/wp\/v2\/posts\/1193"}],"collection":[{"href":"https:\/\/www.thepyroscope.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.thepyroscope.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.thepyroscope.com\/blog\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.thepyroscope.com\/blog\/wp-json\/wp\/v2\/comments?post=1193"}],"version-history":[{"count":3,"href":"https:\/\/www.thepyroscope.com\/blog\/wp-json\/wp\/v2\/posts\/1193\/revisions"}],"predecessor-version":[{"id":1197,"href":"https:\/\/www.thepyroscope.com\/blog\/wp-json\/wp\/v2\/posts\/1193\/revisions\/1197"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.thepyroscope.com\/blog\/wp-json\/wp\/v2\/media\/1201"}],"wp:attachment":[{"href":"https:\/\/www.thepyroscope.com\/blog\/wp-json\/wp\/v2\/media?parent=1193"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.thepyroscope.com\/blog\/wp-json\/wp\/v2\/categories?post=1193"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.thepyroscope.com\/blog\/wp-json\/wp\/v2\/tags?post=1193"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}