{"product_id":"bonaire-sit-sigma-845-modulating-gas-valve-st0845052","title":"Bonaire SIT Sigma 845 Modulating Gas Valve","description":"\u003cdiv style=\"text-align: left;\"\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003eThis is a genuine SIT Sigma 845 modulating gas valve, a critical spare part for Bonaire Vulcan ducted gas heaters, ensuring steady and efficient burner operation.\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003eIn Australian heating systems, reliable gas valves like this are essential for safety and consistent warmth, especially during cooler months. Replacing a faulty gas valve means you're not just restoring heat; you're often fixing intermittent firing issues or a system stuck on a low flame, which can be a real headache on a cold morning.\u003c\/p\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eBest For\u003c\/h2\u003e\n\u003cul style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003e\n\u003cli\u003eHVAC service technicians\u003c\/li\u003e\n\u003cli\u003eGas appliance repair specialists\u003c\/li\u003e\n\u003cli\u003eOwners of Bonaire Vulcan ducted gas heaters needing a direct replacement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eCompatibility\u003c\/h2\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003eThis SIT Sigma 845 valve is specifically designed as a direct replacement for Bonaire Vulcan ducted gas heaters, corresponding to Bonaire Part Number 5310702SP. It's a 230-240V modulating valve.\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003eIf you're running a different model, check fittings and specs before ordering.\u003c\/p\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eFeatures\u003c\/h2\u003e\n\u003cul style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eSIT Sigma 845 Modulating Gas Valve:\u003c\/strong\u003e Provides precise control over gas flow for optimal burner performance and efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e230-240V Operation:\u003c\/strong\u003e Designed for compatibility with standard residential and light commercial power supplies in Australia.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect OEM Replacement:\u003c\/strong\u003e Specifically engineered as a direct fit for Bonaire Vulcan heaters (Bonaire PN 5310702SP).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine SIT Component:\u003c\/strong\u003e Ensures reliability, long service life, and seamless integration with original heater specifications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 16px; margin-bottom: 20px;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"color: #007acc; border: 1px solid #e0e0e0; padding: 10px; text-align: left; background-color: #f5f5f5;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"color: #007acc; border: 1px solid #e0e0e0; padding: 10px; text-align: left; background-color: #f5f5f5;\"\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eManufacturer Part Number\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eSIT PN 0845052\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eBonaire Part Number\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e5310702SP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eVoltage\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003e230-240V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #e0e0e0; padding: 10px;\"\u003eModulating Gas Valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003e\n\u003cli\u003e1 x Bonaire SIT Sigma 845 Modulating Gas Valve (ST0845052)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eUsing It on the Job\u003c\/h2\u003e\n\u003col style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003e\n\u003cli\u003eAlways isolate power to the ducted gas heater at the main switchboard and ensure proper lockout\/tagout procedures are followed.\u003c\/li\u003e\n\u003cli\u003eShut off the gas supply to the appliance before disconnecting any gas lines. Verify zero pressure in the line.\u003c\/li\u003e\n\u003cli\u003eCarefully remove the old gas valve, noting all electrical and gas connections.\u003c\/li\u003e\n\u003cli\u003eInstall the new SIT Sigma 845 valve, ensuring all gas connections are correctly sealed and tightened to manufacturer specifications.\u003c\/li\u003e\n\u003cli\u003eReconnect electrical wiring as per the heater's wiring diagram.\u003c\/li\u003e\n\u003cli\u003eRestore gas supply, check thoroughly for leaks using an approved leak detection solution, then restore power and test the heater's operation across all settings.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003eLimitations \u0026amp; Safety Notes\u003c\/h2\u003e\n\u003cul style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003e\n\u003cli\u003eInstallation and servicing of gas appliances must be performed by a currently licenced gasfitter in Australia.\u003c\/li\u003e\n\u003cli\u003eEnsure gas and electrical supplies are isolated and verified safe before commencing any work.\u003c\/li\u003e\n\u003cli\u003eOnly compatible with the specific Bonaire Vulcan models that use Bonaire PN 5310702SP. Always double-check your existing part number.\u003c\/li\u003e\n\u003cli\u003eAlways follow the manufacturer's installation instructions and local gas safety regulations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cblockquote style=\"border-left: 4px solid #007acc; background-color: #f9f9f9; font-style: italic; padding: 15px; margin: 20px 0;\"\u003eWhen swapping out these modulating valves, always double-check your wiring against the heater's schematic. Sometimes, a wire can look similar, but getting it wrong can cause control board errors or incorrect flame modulation. A quick photo before you start can save a lot of grief.\u003c\/blockquote\u003e\n\u003ch2 style=\"color: #007acc; border-bottom: 2px solid #f0f0f0; padding-bottom: 8px; margin-top: 35px;\"\u003ePair With\u003c\/h2\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.6; margin-bottom: 20px;\"\u003ePair with gas leak detection spray and a digital multimeter for checking voltage and signals during installation and commissioning. Consider also grabbing some thread sealant for your gas connections.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Automated FAQ Schema --\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Bonaire","offers":[{"title":"Default Title","offer_id":43569062969403,"sku":"ST0845052","price":304.94,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0316\/7787\/4235\/files\/593_ST0845052_1.png?v=1780544320","url":"https:\/\/www.hvacshop.com.au\/products\/bonaire-sit-sigma-845-modulating-gas-valve-st0845052","provider":"HVAC Supply Shop","version":"1.0","type":"link"}