{"product_id":"viessmann-7839824","title":"Viessmann 7839824 Gas Valve","description":"\u003cp\u003eThe \u003cstrong\u003eViessmann 7839824 Gas Valve\u003c\/strong\u003e is a critical replacement component engineered for the \u003cstrong\u003eVitodens 200-W B2HA series\u003c\/strong\u003e, specifically the 399 and 530 models. As a \u003cstrong\u003eCES-Big gas valve\u003c\/strong\u003e, this unit is designed to handle the high-input demands of commercial and large-scale residential condensing boilers. Operating on a \u003cstrong\u003e120V\/1\/60 power supply\u003c\/strong\u003e, it ensures precise fuel regulation and consistent \u003cstrong\u003ecombustion performance\u003c\/strong\u003e. Technicians should note its integration with the burner control system to maintain strict safety parameters and operational efficiency. The robust construction of this \u003cstrong\u003eOEM Viessmann part\u003c\/strong\u003e facilitates a direct fit, reducing labor time during field replacements. When troubleshooting ignition cycles or flame rectification issues on \u003cstrong\u003eB2HA 112 and 150\u003c\/strong\u003e units, verifying the integrity of this valve is essential. This \u003cstrong\u003egas burner control valve\u003c\/strong\u003e is a vital link in maintaining the low-emission output and high-turndown ratios characteristic of the Vitodens line.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003eSpecifically calibrated for high-capacity \u003cstrong\u003eVitodens 200-W B2HA 399\/530\u003c\/strong\u003e boiler chassis.\u003c\/li\u003e\n  \u003cli\u003eProvides precision \u003cstrong\u003egas flow regulation\u003c\/strong\u003e to support efficient condensing technology.\u003c\/li\u003e\n  \u003cli\u003eDirect replacement for \u003cstrong\u003eViessmann 7839824\u003c\/strong\u003e to ensure secondary safety shutoff compliance.\u003c\/li\u003e\n  \u003cli\u003eBuilt to withstand the rigorous duty cycles of large-scale \u003cstrong\u003egas-fired heating systems\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003eReliable \u003cstrong\u003e120V 60Hz single-phase\u003c\/strong\u003e electrical interface for standard North American burner configurations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eIs the Viessmann 7839824 compatible with smaller B2HB models?\u003c\/strong\u003e\u003cbr\u003e\nNo, this \u003cstrong\u003eCES-Big gas valve\u003c\/strong\u003e is specifically sized for the higher BTU inputs of the \u003cstrong\u003eB2HA series\u003c\/strong\u003e (399\/530) and is not cross-compatible with smaller residential units like the B2HB series.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat are the symptoms of a failing gas valve in a Viessmann boiler?\u003c\/strong\u003e\u003cbr\u003e\nCommon indicators include persistent \"F4\" or \"EE\" error codes, failed ignition attempts despite a strong spark, or irregular \u003cstrong\u003eCO2 combustion readings\u003c\/strong\u003e during high-fire modulation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes this valve require specialized tools for installation?\u003c\/strong\u003e\u003cbr\u003e\nWhile standard wrenches are used for the mechanical pipe connections, a calibrated digital manometer is required to set the \u003cstrong\u003einlet gas pressure\u003c\/strong\u003e and offset according to the manufacturer's technical manual.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong style=\"color: red;\"\u003eThis item is not eligible for free shipping.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Viessmann","offers":[{"title":"Default Title","offer_id":43504627155122,"sku":"7839824","price":1420.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Pic_6992bdc3-97ab-4c7a-bac5-aea0a0e9f099.png?v=1752266934","url":"https:\/\/www.gsistore.com\/en-ca\/products\/viessmann-7839824","provider":"GSIstore","version":"1.0","type":"link"}