1. Introduction
This manual provides essential information for the safe and efficient operation of your Pentair MasterTemp 460737 High Performance Eco-Friendly Pool Heater. This 400,000 BTU propane gas heater is designed for best-in-class energy efficiency, heating your pool or spa quickly. It features a rotating digital display for easy viewing and a tough, rustproof exterior built to withstand various weather conditions. Please read all instructions carefully before installation, operation, or maintenance.
2. Key Features
- 400,000 BTU Propane Gas: Provides powerful and rapid heating for pools and spas.
- Fast Heating: Significantly reduces wait times for desired water temperatures.
- Best-in-Class Energy Efficiency: Designed for optimal energy consumption.
- Manual Gas Shut-off: Required for safety during servicing.
- Low NOx Emission Certified: Exceeds industry standards for eco-friendly operation.
- Durable Construction: Features a tough, rustproof exterior for longevity.
- Rotating Digital Display: Allows for easy viewing and control of settings.
- Compact Dimensions: Measures 36 inches (length) by 30 inches (height) by 25 inches (width).
3. Setup and Installation
Proper installation is crucial for the safe and efficient operation of your MasterTemp heater. It is recommended that installation be performed by a qualified professional in accordance with local codes and regulations. Ensure the heater is placed on a level, non-combustible surface with adequate clearance for ventilation and servicing. Connect the gas supply line, water inlet, and outlet pipes securely. The unit requires a manual gas shut-off for servicing.

Figure 1: The Pentair MasterTemp 460737 pool heater, a compact and efficient unit designed for heating pools and spas. The heater features a durable, rustproof exterior and a digital control panel for easy operation.
For detailed wiring diagrams, plumbing configurations, and gas connection instructions, please refer to the complete installation guide provided with your product.
4. Operating Instructions
The MasterTemp heater features a user-friendly digital control panel. To operate:
- Ensure the pool pump is running to provide adequate water flow to the heater.
- Open the control panel cover to access the digital display and buttons.
- Press the 'Pool/Spa' button to select the desired heating mode.
- Use the 'Temp Up' and 'Temp Down' arrow buttons to set your desired water temperature.
- The 'Heating' indicator light will illuminate when the heater is actively warming the water.
- To turn off the heater, press the 'Heater Off' button.
Always monitor the water temperature and ensure proper water chemistry for optimal performance and longevity of the heater. Refer to the full user guide for advanced settings and error code explanations.
5. Maintenance
Regular maintenance ensures the longevity and efficiency of your Pentair MasterTemp heater. Key maintenance tasks include:
- Seasonal Shut-down: In colder climates, disconnect and properly store the heater for the winter to prevent freeze damage.
- Gas Shut-off: Always manually shut off the gas supply before any maintenance or servicing.
- Cleanliness: Keep the exterior of the heater clean and free from debris to ensure proper ventilation.
- Water Chemistry: Maintain balanced pool water chemistry to prevent corrosion and scale buildup within the heater's components.
- Professional Inspection: Schedule annual inspections by a qualified pool technician to check for wear, leaks, and proper operation.
For detailed cleaning procedures and specific component maintenance, consult the comprehensive maintenance section in your user manual.
6. Troubleshooting
If your Pentair MasterTemp heater is not functioning as expected, consider the following common issues:
- Heater Not Firing: Check if the gas supply is open and the propane tank (if applicable) is not empty. Ensure the pool pump is running and providing sufficient water flow.
- Insufficient Heating: Verify the set temperature on the digital display. Check for proper water flow and ensure the heater is sized correctly for your pool volume.
- Error Codes: The digital display may show specific error codes. Refer to your user manual's troubleshooting section for a list of codes and their corresponding solutions.
- Unusual Noises or Odors: Immediately shut off the heater and gas supply. Contact a qualified service technician.
Always prioritize safety. If you are unsure about any troubleshooting step or if the problem persists, contact a certified Pentair service professional. Do not attempt repairs beyond your technical capabilities.
7. Specifications
| Specification | Detail |
|---|---|
| Product Dimensions | 36 x 25 x 30 inches |
| Item Weight | 65 pounds |
| Manufacturer | Pentair |
| ASIN | B004VU87NW |
| Item Model Number | 460737 |
| Is Discontinued By Manufacturer | No |
| Fuel Type | Propane Gas |
| BTU Rating | 400,000 BTU |
8. Warranty and Support
Pentair products are designed for reliability and performance. For specific warranty details, including coverage period and terms, please refer to the warranty card included with your product or visit the official Pentair website. For technical support, service inquiries, or to locate an authorized service center, please contact Pentair customer service. Keep your purchase receipt and model number handy for faster assistance.
9. Product Videos
No official seller-created product videos were found for this model in the provided data. For visual guides or demonstrations, please refer to the official Pentair website or consult your local dealer.





