Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your Rheem RHTF-CHN10P Instantaneous Forced Draft Water Heater. Please read these instructions carefully before using the appliance and keep this manual for future reference. This water heater is designed to provide instant hot water for up to two services, offering significant gas savings and a modern digital touch screen for temperature control.

Figure 1: Rheem RHTF-CHN10P Instantaneous Forced Draft Water Heater
Important Safety Information
WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause property damage, injury, or death. Read the installation, operating, and maintenance instructions thoroughly before installing or servicing this equipment.
- Ensure the water heater is installed in a well-ventilated area, protected from the elements.
- Do not store flammable materials near the water heater.
- Verify the gas type (LP Gas) matches the appliance specifications.
- Regularly check for gas leaks using a soap and water solution.
- Keep children away from the appliance.
- Only qualified personnel should perform installation and maintenance.
Product Specifications
| Feature | Specification |
|---|---|
| Manufacturer | Rheem |
| Model Number | RHTF-CHN10P |
| Color | White |
| Style | Tankless |
| Material | Metal |
| Shape | Rectangular |
| Power Source | Gas |
| Special Features | Unlimited hot water, instant, no pilot, reduced gas consumption |
| Batteries Required? | No |
| Length | 35 centimeters |
| Width | 15 centimeters |
| Height | 62 centimeters |
| Product Dimensions | 35 x 15 x 62 cm; 9.9 kg |
| Capacity | 10 Liters |
| Number of Services | 2 |
| Energy Efficiency | Up to 80% gas savings |

Figure 2: Product dimensions (Height 61.8 cm, Width 34.5 cm, Depth 14.7 cm)
Package Contents
Upon unpacking your Rheem water heater, please ensure all components are present and undamaged. The package typically includes:
- Rheem RHTF-CHN10P Instantaneous Water Heater unit
- User Manual and Warranty Information
- Mounting hardware (screws, anchors)
- Gas connection nipple
Video 1: Unboxing and package contents for a similar instantaneous water heater. This video demonstrates typical items included, such as the manual and mounting hardware.
Installation
Proper installation is crucial for the safe and efficient operation of your water heater. It is recommended that installation be performed by a qualified technician.
1. Location Selection
- Install the unit in a covered area with adequate ventilation. Avoid outdoor exposure to harsh weather conditions.
- Ensure sufficient clearance around the unit for maintenance and proper airflow.
- The water heater is suitable for vertical housing and home use.
2. Mounting the Unit
- Use a drill to create holes for the mounting anchors.
- Insert the anchors and then the screws to secure the water heater to the wall.
- Hang the water heater vertically on the installed screws.
3. Connecting Water and Gas Lines
- Connect the gas nipple to the gas inlet. Use two adjustable wrenches to tighten securely, preventing other parts from loosening.
- Connect the flexible hoses for cold water inlet, hot water outlet, and gas.
- Ensure all valves are closed during installation.
4. Leak Test
- Open the water supply valves.
- Apply a soap and water solution to the gas connection. If bubbles appear, tighten the connection until no bubbles are visible.
5. Battery Installation
- Insert two D-type alkaline batteries into the designated compartment.
- Close the battery compartment cover and activate the power switch.
Video 2: Detailed installation guide for an instantaneous water heater. This video covers mounting, connecting lines, leak testing, and battery installation.
Operating Instructions
Your Rheem water heater features water flow ignition, providing instant hot water without a pilot light.
1. Automatic Ignition
The water heater automatically ignites when water flow is detected upon opening a hot water tap or shower. It turns off when the water flow stops.
2. Temperature and Flow Control
The unit is equipped with a modern digital touch screen display and control knobs for adjusting temperature and water flow.
- Temperature Knob: Adjusts the amount of gas passing through the unit. Higher gas flow results in higher water temperature.
- Water Flow Knob: Controls the water flow rate. Higher flow distributes heat better, allowing for a wider temperature range.
3. Optimal Settings
The water heater offers two optimal positions for different seasons:
- Winter Mode: Set water flow to minimum and temperature to maximum. This restricts water passage, allowing it to absorb more heat from the flame.
- Summer Mode: Set water flow to maximum and temperature to minimum. In this mode, water passes at maximum capacity, as summer temperatures are optimal for comfort.
The comfort temperature is typically around 36°C (body temperature), but optimal settings may vary based on personal preference and local conditions. Recommended temperature range is 40°C to 55°C.
Video 3: Operating instructions for an instantaneous water heater, demonstrating temperature and flow adjustments, and optimal settings for different seasons.
Maintenance
Regular maintenance ensures the longevity and optimal performance of your water heater.
- Periodically clean the exterior of the unit with a soft, damp cloth. Do not use abrasive cleaners.
- It is recommended to have the water heater inspected and serviced by a qualified technician annually to check for wear and tear, clean internal components, and ensure safe operation.
- Check water and gas connections for any signs of leaks or corrosion.
Troubleshooting
Here are some common issues and their solutions:
- No Hot Water: Check if the gas supply is open and if the water flow is sufficient to trigger ignition. Ensure batteries are correctly installed and charged.
- Error EE (Overheating): This error indicates overheating. To resolve, set the water flow knob to maximum and the temperature knob to minimum. This can also occur due to incorrect knob placement.
- Low Water Pressure: Ensure adequate water pressure from your main supply. The Rheem Aqua Balance technology is designed to adapt to varying water pressures, but extremely low pressure may affect performance.
- Inconsistent Temperature: Adjust the temperature and water flow knobs to find your desired stable temperature. The modulating feature helps maintain consistent temperature even with pressure variations.
Video 4: Troubleshooting tips for an instantaneous water heater, including how to address the 'Error EE' code and adjust settings for optimal performance.
Warranty and Support
Your Rheem RHTF-CHN10P water heater comes with the following warranty:
- 3 years on the heat exchanger and burner.
- 1 year on electrical and electronic components.
For technical support, service, or warranty claims, please contact Rheem customer service. Refer to the contact information provided in your product packaging or visit the official Rheem website.





