Grant Pellet Feed Thermostat Spira Wps11

Biomass Boiler Thermostat Spira

Grant Pellet Feed Thermostat – WPS11

Genuine High-Limit Safety Thermostat for Grant Spira Wood Pellet Boilers

The Grant WPS11 Pellet Feed Thermostat is a genuine high-limit safety thermostat designed specifically for use with Grant Spira biomass wood pellet boilers. This thermostat plays a vital safety role by monitoring the temperature within the pellet feed system and shutting down the pellet supply if an unsafe temperature is detected—helping to prevent overheating, back-burn, and potential fire risks.

Installed as part of the Grant Spira’s internal safety systems, the WPS11 is essential to the reliable and compliant operation of your biomass boiler. If your boiler is showing feed system errors or has triggered a thermal cut-out, replacing a faulty or aged thermostat with the WPS11 ensures safe and dependable performance.

 Key Features & Benefits

• Official Grant Part – WPS11
  Genuine OEM component designed for precise compatibility with Grant Spira pellet boilers.

• Thermal Safety Cut-Out Function
  Automatically stops pellet feed if the temperature rises above a safe threshold—preventing feed fires or system damage.

• Essential Biomass Boiler Protection
  Protects the auger and burner feed assembly from overheating due to flame reversal or malfunction.

• High-Temperature Resistance
  Built to perform reliably in high-heat environments within the pellet feed housing.

• Plug-and-Play Replacement
  Designed for easy swap-over with original component—no need for rewiring or modification.

• Supports Safe Boiler Operation
  A vital part of the boiler’s fail-safe system—ensures compliance with safety standards and MCS guidance.

 Compatible Grant Boiler Models

The WPS11 Pellet Feed Thermostat is compatible with:

• Grant Spira 6kW Biomass Boiler

• Grant Spira 9kW Biomass Boiler

• Grant Spira 15kW Biomass Boiler

• Grant Spira 18kW Biomass Boiler

• Grant Spira 22kW Biomass Boiler

• Grant Spira 26kW Biomass Boiler

Unsure if this part fits your model? Contact us with your boiler’s serial number for instant compatibility confirmation.

When to Replace the WPS11 Thermostat

Replace the WPS11 if:

• The boiler displays pellet feed temperature or safety lockout errors

• The pellet auger or feed system has shut down unexpectedly

• There are visible signs of thermal damage, fatigue, or failure

• You are completing a scheduled service or safety system check

• You're upgrading or replacing other safety control components

A faulty pellet feed thermostat compromises boiler safety—timely replacement protects your system and maintains operational integrity.

 Technical Specifications

• Part Number: WPS11

• Manufacturer: Grant UK

• Component Type: High-limit safety thermostat for pellet feed system

• Function: Monitors feed temperature and cuts off feed in overheat conditions

• Application: Grant Spira wood pellet boilers

• Temperature Cut-Off: Factory-set (refer to manual; typically 80–100°C range)

• Mounting: Secured in feed/auger assembly housing

• Wiring: Supplied with standard terminals for quick-fit connection