This Bonaire SIT 845 Sigma modulating gas valve is a direct replacement for your heating system, ensuring accurate gas flow for optimal performance. When a gas valve goes on the fritz, especially in the middle of winter, you know it's not just a minor inconvenience – it's a priority fix.
This 24V valve is designed to keep your ducted heater running smoothly, giving you consistent warmth without the hassle of inconsistent heating cycles. It's the kind of part you need to swap out confidently, knowing your customer will be warm again quickly.
Best For
- HVAC service technicians replacing faulty Bonaire gas valves.
- Maintenance teams servicing ducted gas heating systems.
- Competent DIY owners repairing their Bonaire Vulcan heaters.
Compatibility
This SIT Sigma 845 valve (SIT PN 0845113) is specifically designed as a direct replacement for Bonaire Vulcan heaters requiring part number 5440702SP. It's a 24V modulating valve, common in many residential and light commercial ducted gas heating systems. If you're running a different model, check fittings and specs before ordering.
Features
- Genuine SIT Sigma 845 modulating gas valve, ensuring reliable operation.
- 24V electrical operation, compatible with standard control circuits.
- Direct replacement for Bonaire Part Number 5440702SP.
- Original SIT Part Number 0845113 for cross-referencing.
What's in the Box
- 1 x Bonaire SIT 845 Sigma Modulating Gas Valve (24V)
Using It on the Job
- Isolate Power: Always isolate and tag out the main power supply to the heater before starting any work.
- Shut Off Gas: Ensure the main gas supply to the appliance is turned off at the isolation valve.
- Depressurise System: Safely depressurise the gas lines before disconnecting the old valve.
- Disconnect Old Valve: Carefully disconnect all electrical wiring and gas connections from the faulty valve, noting their positions.
- Install New Valve: Mount the new valve, making all gas connections secure and leak-free, then reconnect the electrical wiring correctly.
- Leak Check: Test all gas connections thoroughly with an approved leak detection solution before restoring gas supply.
- Test Operation: Restore power and gas, then test the heater's function across its full modulation range to confirm proper operation.
Limitations & Safety Notes
- Installation and servicing of gas appliances must be performed by a licensed gas fitter in Australia.
- Always isolate power and gas supply before commencing any work on the appliance.
- Test all gas connections for leaks thoroughly before returning the appliance to service.
- Only for use with compatible Bonaire heating systems as specified by the manufacturer.
Tradie Pro Tip: Before you pull the old valve out, take a quick photo of the wiring and gas connections. It's an old trick, but it saves a headache when you're trying to figure out which wire goes where, especially on a tight service call in a cramped roof space.
Pair With
Pair with gas leak detectors and manifold gauges for safe installation, and consider a new ignitor or flame sensor if you're doing a full service on the combustion system for a complete overhaul.