1. Introduction
The Rheem 2.5 Gallon Mini-Tank Electric Water Heater is designed to provide hot water efficiently at the point of use. Its compact size allows for flexible installation in various locations, such as under sinks, in garages, or recreational vehicles. This manual provides essential information for the safe and effective installation, operation, and maintenance of your water heater.
Key Features:
- 2.5-gallon capacity for efficient point-of-use hot water.
- Easy installation with a 15-amp plug for 120-volt outlets.
- Adjustable temperature control ranging from 50°F to 140°F.
- Enameled glass-lined tank for extended product life.
- Versatile floor and wall mountable design, with wall bracket included.
Figure 1.1: Front view of the Rheem 2.5 Gallon Mini-Tank Electric Water Heater, showing the Rheem logo and temperature control dial.
2. Safety Information
Read and understand all safety instructions before installing, operating, or performing maintenance on this water heater. Failure to follow these instructions could result in property damage, personal injury, or death.
General Safety Precautions:
- This appliance is not intended for use by persons (including children) with reduced physical, sensory, or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety.
- Children should be supervised to ensure that they do not play with the appliance.
- Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
- Ensure proper ventilation if installed in an enclosed space.
Electrical Safety:
- Ensure the electrical supply matches the requirements of the water heater (120 Volts, 15 Amps, 1.4 KW).
- Always disconnect power to the unit before performing any service or maintenance.
- Do not operate the water heater if the power cord is damaged.
Water Safety:
- Install a Temperature and Pressure (T&P) relief valve as specified in the installation instructions to prevent excessive pressure buildup.
- Do not block or tamper with the T&P relief valve.
- Ensure the water heater is filled with water before turning on the power to prevent damage to the heating element.
3. Package Contents
Verify that all components are present before beginning installation:
- Rheem Mini-Tank Electric Water Heater (2.5 Gallon)
- Temperature and Pressure (T&P) Valve
- Wall Mounting Bracket
- Instruction Manual
4. Installation
Proper installation is crucial for the safe and efficient operation of your water heater. If you are unsure about any step, consult a qualified plumber or electrician.
Pre-Installation Checklist:
Figure 4.1: Checklist for tankless electric water heater purchase, ensuring electrical service, hot water output, temperature delivery, and clearance requirements are met.
Mounting Options:
The water heater can be mounted on the floor or a wall. A wall bracket is included for wall mounting. Ensure the mounting surface is capable of supporting the weight of the water heater when full (approximately 20.8 lbs dry weight + 2.5 gallons * 8.34 lbs/gallon = ~41.65 lbs).
Figure 4.2: Back view of the water heater, illustrating the designated mounting points for secure installation.
Dimensions:
Consider the following dimensions for proper placement and clearance:
- Height: 17 inches
- Width: 11 inches
- Depth: 11 inches
Figure 4.3: Dimensional diagram of the water heater, indicating its height, width, and depth for installation planning.
Plumbing Connections:
Connect the water heater to the cold water supply and hot water outlet using appropriate plumbing fittings. The unit includes clearly marked inlet and outlet ports.
- Connect the cold water supply line to the Inlet (blue marking).
- Connect the hot water outlet line to the Outlet (red marking).
- Install the provided T&P relief valve in the designated port.
Figure 4.4: Top view of the water heater, highlighting the inlet (cold water) and outlet (hot water) connections.
Electrical Connection:
This 2.5-gallon model is equipped with a 15-amp plug, designed to connect to a standard 120-volt electrical outlet. Ensure the circuit can handle the 1.4 KW wattage of the unit.
5. Operating Instructions
Once installed and filled with water, operating your Rheem Mini-Tank Electric Water Heater is straightforward.
Temperature Control:
- The front panel features an adjustable temperature control dial.
- Rotate the dial to select your desired water temperature, ranging from 50°F (10°C) to 140°F (60°C).
- A green indicator light will illuminate when the unit is powered on and actively heating water.
Figure 5.1: Side view of the water heater, showing the temperature control dial and power indicator light.
6. Maintenance
Regular maintenance helps ensure the longevity and efficient performance of your water heater.
Annual Checks:
- T&P Valve Test: Annually, lift and release the lever on the T&P relief valve to ensure it operates freely and discharges water. If it does not, replace the valve.
- Drain Sediment: Periodically drain a small amount of water from the tank to remove sediment buildup, which can affect efficiency. Refer to the full installation manual for detailed draining procedures.
- Inspect Connections: Check all water and electrical connections for leaks or signs of wear. Tighten as necessary.
Figure 6.1: Internal view of the water heater, showing the heating element and wiring. Regular inspection of internal components should only be performed by qualified personnel.
7. Troubleshooting
If you encounter issues with your water heater, refer to the following common troubleshooting steps. For complex problems, contact qualified service personnel.
Common Issues:
- No Hot Water:
- Check if the unit is plugged in and the power indicator light is on.
- Verify the circuit breaker has not tripped.
- Ensure the temperature dial is set to a desired temperature.
- Water Not Hot Enough:
- Increase the temperature setting on the dial.
- Allow sufficient time for the water to heat up (recovery time depends on incoming water temperature).
- Check for excessive hot water demand exceeding the unit's capacity.
- Leaking Water:
- Inspect plumbing connections for tightness.
- Check the T&P relief valve for drips; this may indicate high pressure or a faulty valve.
- If the leak is from the tank itself, discontinue use and contact support.
8. Specifications
| Feature | Specification |
|---|---|
| Brand | Rheem |
| Model Number | PROE2 1 RH MT |
| Capacity | 2.5 Gallon |
| Color | Gray |
| Wattage | 1.4 KW |
| Voltage | 120 Volts |
| Maximum Temperature | 140 Degrees Fahrenheit (60°C) |
| Efficiency | High |
| Maximum Operating Pressure | 150 PSI |
| Mounting Type | Floor, Wall |
| Item Weight | 17.6 pounds |
| Product Dimensions (L x W x H) | 11 x 11 x 17 inches |
| Included Components | T&P Valve; Wall Bracket |
| UPC | 020352757056 |
9. Warranty and Support
Rheem products are manufactured to high-quality standards and come with a limited warranty. For specific warranty details, please refer to the warranty card included with your product or visit the official Rheem website.
For technical assistance, troubleshooting beyond this manual, or to inquire about replacement parts, please contact Rheem customer support:
- Rheem Official Website: www.rheem.com
- Refer to your product packaging or the Rheem website for the most current contact information.
