1. Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your Rinnai V53DeN Natural Gas Tankless Water Heater. This high-performance, gas-powered unit is designed for outdoor installation and delivers a continuous supply of hot water at an impressive flow rate of 5.3 Gallons Per Minute (GPM). Its compact design and energy-efficient operation make it an ideal choice for various residential applications, providing endless hot water while helping to reduce utility bills.
2. Safety Information
WARNING: Water temperature over 125°F (52°C) can cause severe burns instantly or death from scalds. Children, disabled, and elderly individuals are at highest risk of scalding. Always feel water temperature before bathing or showering. Vapors from flammable liquids will explode and catch fire, causing death or severe burns. Ensure proper ventilation and follow all local codes and regulations.
GAS SAFETY: If you smell gas, STOP! Follow the instructions on the unit label immediately. Do not attempt to light any burner by hand. Turn off all electric power to the appliance. Turn off the gas shutoff valve located on the outside of the unit. If the odor persists, call your gas supplier or fire department. Professional installation is highly recommended to ensure safe operation and compliance with all applicable codes.
3. Product Overview
The Rinnai V53DeN tankless water heater is engineered for reliability and efficiency. It provides hot water on demand, eliminating the need for a storage tank and saving valuable space. Key features include:
- Unlimited Hot Water: Delivers 5.3 GPM, sufficient to serve up to four appliances simultaneously.
- Energy Efficiency: Heats water only when needed, contributing to lower energy consumption and reduced utility bills.
- Compact Design: Ideal for outdoor installation, saving indoor space.
- Durable Construction: Backed by a comprehensive warranty for long-lasting performance.
4. Setup and Installation
Professional installation is strongly recommended for the Rinnai V53DeN to ensure proper function, safety, and adherence to all local building and gas codes. This unit is designed for outdoor installation and requires appropriate gas and water line connections, as well as an electrical connection for operation.
4.1 Installation Steps Overview
- Determine Location: Choose an outdoor location that complies with local codes for gas appliances and provides adequate clearance.
- Mounting: Securely mount the unit to a sturdy wall surface using appropriate hardware.
- Gas Connection: Connect the natural gas supply line to the unit's gas inlet. Ensure all connections are sealed and tested for leaks.
- Water Connections: Connect the cold water inlet and hot water outlet lines. Install a valve set to allow for future descaling maintenance.
- Electrical Connection: Plug the unit into a standard electrical outlet. The unit requires power to operate, including for the pilot light and controls.
- Ventilation: Ensure proper venting is established according to manufacturer guidelines and local codes.
4.2 Installation Video Reference
5. Operating Instructions
The Rinnai V53DeN operates by heating water only when a hot water tap is opened. This on-demand system ensures you never run out of hot water.
5.1 Temperature Control
The unit features a digital display and controls for setting the desired water temperature. The maximum temperature setting is 140°F (60°C). For safety, it is recommended to set the temperature to 120°F (49°C) to prevent scalding, especially in households with children or elderly individuals.
5.2 Power Requirements
The unit requires a continuous electrical supply to power its internal components, including the ignition system and control panel. In the event of a power outage, the unit will not operate unless connected to an alternative power source like a small generator, provided it meets the unit's electrical requirements.
6. Maintenance
Regular maintenance is crucial for the longevity and optimal performance of your tankless water heater. It is recommended to perform annual descaling to prevent mineral buildup, especially in areas with hard water.
6.1 Annual Descaling
Descaling involves circulating a descaling solution through the unit to remove mineral deposits. This process typically takes about an hour and requires a descaling kit, which can be purchased separately. If you are not comfortable performing this task, contact a qualified technician.
6.2 Water Filtration
Consider installing a phosphor filter upstream from the unit to further reduce scale buildup and extend the intervals between descaling.
7. Troubleshooting
Here are some common issues and their potential solutions:
- No Hot Water: Check if the unit has power and if the gas supply is open. Ensure there are no error codes displayed on the control panel.
- Error Codes: If an error code appears (e.g., due to low propane), consult the unit's specific error code chart in the full owner's manual or contact a qualified technician.
- Cold Water Bursts/Lag: Tankless water heaters heat on demand, so there may be a slight delay (lag) before hot water reaches distant fixtures. This is normal operation.
- Noise: The unit may produce a slight sound when operating, which is normal. Excessive or unusual noises should be investigated by a technician.
8. Specifications
| Feature | Specification |
|---|---|
| Brand | Rinnai |
| Model | V53DeN |
| Fuel Type | Natural Gas |
| Maximum Flow Rate | 5.3 Gallons Per Minute (GPM) |
| Voltage | 120 Volts |
| Wattage | 81000 watts |
| Maximum Temperature | 140 Degrees Fahrenheit |
| Efficiency | 0.82 |
| Mounting Type | Wall |
| Item Weight | 33 pounds |
| Product Dimensions | 18 x 18 x 31.2 inches |
| UPC | 766156011795 |
9. Warranty and Support
The Rinnai V53DeN Tankless Water Heater comes with a robust residential factory warranty:
- Heat Exchanger: 10 years
- Labor: 5 years
- Parts: 1 year
For professional installation, service, or warranty claims, please visit the Rinnai PRO page to find a qualified technician or contact Rinnai customer support.