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Honeywell WT8840B1000 Water Heater Control - The Complete Replacement Solution
The Honeywell WT8840B1000 combines reliable temperature control and safety features in a single unit, providing a comprehensive solution for your standing pilot water heater. This direct replacement control delivers exceptional performance with straightforward installation, helping you maintain consistent hot water with minimal maintenance.
Performance Benefits
The WT8840B1000 has been thoroughly tested and certified by CSA International against multiple ANSI and CSA standards for reliable operation and safety performance.
| Feature | Specification | Benefit |
|---|---|---|
| Temperature Control | Integrated NTC Sensor | ✓ Precise Water Temperature |
| Safety Protection | Temp. Cut-Out (TCO) | ✓ Automatic Shutdown Protection |
| Gas Capacity (NG) | Up to 85,000 Btuh | ✓ Handles High-Demand Systems |
| Power Source | Self-Powered | ✓ No External Electricity Required |
| Compatibility | Direct Replacement | ✓ Replaces Multiple Legacy Models |
How It Works: Integrated Control System
Stage 1: Pilot Flame Sensing
Function: Thermopile generates power from pilot flame heat
Benefit: Self-powered operation without external electricity
Stage 2: Temperature Monitoring
Function: Dual NTC thermistor sensors measure water temperature
Benefit: Provides both control and safety limit functions
Stage 3: Intelligent Control
Function: Electronic circuit regulates gas flow based on temperature
Benefit: Maintains consistent water temperature for comfort
Stage 4: Safety Monitoring
Function: Continuous monitoring for fault conditions
Benefit: Visual error codes simplify troubleshooting
Key Features
- ✓ Direct Replacement: Specifically replaces WV8840B1042, WV8840B1109, and WV8840B1110 models
- ✓ Status Indicator: LED provides visual feedback on system status and diagnostics
- ✓ Wide Operating Range: Functions in temperatures from 32°F to 150°F (0°C to 66°C)
- ✓ Built-in Pressure Regulator: Maintains proper gas pressure for consistent performance
- ✓ CSA Certified: Tested to meet multiple ANSI and CSA standards
- ✓ Piezo Igniter: Integrated push-button ignition for easy pilot lighting
Comparison to Traditional Controls
| Feature | Honeywell WT8840B1000 | Older Control Systems |
|---|---|---|
| Diagnostic Capability | Advanced LED Status Codes | Limited or None |
| Installation Time | < 30 minutes | 45+ minutes |
| Temperature Accuracy | Precise Electronic Control | Variable Mechanical Control |
| Safety Features | Multiple Protection Systems | Basic Protection Only |
| Certification | Multiple ANSI/CSA Standards | Varies by Model |
System Compatibility
The WT8840B1000 is specifically designed as a direct replacement for WV8840B1042, WV8840B1109, and WV8840B1110 water heater controls. It requires the use of a CS8840 pilot assembly and an immersion well for water temperature sensing. Compatible with natural gas systems with capacities from 30,000 to 85,000 Btuh.
What's Included
- 1 × WT8840B1000 Water Heater Control
- Installation instructions
- Warranty information
Note: This Limited Warranty extends to the original purchaser of the product only. This warranty covers all Manufacturer-supplied items that prove to be defective in material, workmanship or factory preparation. This warranty covers parts only; all labor is excluded from this warranty. Warranty is void if product is not installed and maintained according to manufacturer specifications.