1. Introduction and Safety Information
This manual provides essential instructions for the safe installation, operation, and maintenance of your ANZZI Envo 21 kW Electric Tankless Water Heater. Please read all instructions thoroughly before installation and use. Retain this manual for future reference.
Important Safety Warnings:
- Electrical Hazard: Installation must be performed by a qualified electrician in accordance with all national and local electrical codes. Ensure power is disconnected at the main breaker before any installation or service.
- Water Pressure: Do not operate the unit if water pressure is below the minimum required.
- Temperature Settings: Exercise caution when setting water temperature to prevent scalding.
- Freezing: Protect the unit from freezing temperatures. Damage due to freezing is not covered by warranty.
- Flammable Materials: Do not store or use flammable materials near the water heater.
2. Product Overview
The ANZZI Envo 21 kW Electric Tankless Water Heater provides on-demand hot water for various applications, including kitchen faucets, bathroom faucets, and showers. Its compact design and energy-efficient operation eliminate standby heat loss associated with traditional tank heaters.
Figure 2.1: Front view of the ANZZI Envo 21 kW Electric Tankless Water Heater, showcasing its green finish and digital display.
Key Features:
- On-Demand Heating: Heats water only when needed, reducing energy consumption.
- Compact Design: Significantly smaller footprint than traditional tank water heaters.
- LED Display: Provides real-time temperature readings and allows for precise temperature control.
- Overheat Protection: Integrated safety features to prevent excessive water temperatures.
Figure 2.2: Product dimensions of the ANZZI Envo tankless water heater, measuring approximately 10.2 inches wide by 15.1 inches high.
Figure 2.3: Diagram illustrating the internal heating element where cold water enters and hot water exits, demonstrating the continuous heating process.
Figure 2.4: Visual comparison showing the ANZZI Envo tankless water heater occupying significantly less space than a conventional tank water heater.
3. Installation
Proper installation is critical for the safe and efficient operation of your tankless water heater. It is strongly recommended that installation be performed by a licensed plumber and a qualified electrician.
3.1 Electrical Requirements
The ANZZI Envo 21 kW model requires specific electrical infrastructure. Failure to meet these requirements can result in improper operation, damage to the unit, or electrical hazards.
- Power Rating: 21 kW at 240 Volts
- Maximum Current Draw: 87.5 Amps
- Required Breakers: Three (3) 30 Amp Double Pole Breakers
- Required Wire Gauge: 3x8 AWG (American Wire Gauge)
- Minimum Electrical Panel Capacity: 200 Amps or more is typically required for the main electrical panel.
Figure 3.1: Diagram detailing the electrical requirements, including the need for three 30 Amp double pole breakers and 3x8 AWG wiring, connected to a main panel of 200 Amps or more.
3.2 Sizing and Capacity
The performance of a tankless water heater is influenced by the incoming water temperature and the desired flow rate. Refer to the chart below to determine the appropriate model for your local climate and usage needs.
Figure 3.2: A map indicating general temperature areas across the United States, alongside a chart that helps match the water heater's capacity (GPM) to inlet water temperature and approximate usage for various fixtures (hand sink, kitchen sink, shower head, bathtub).
3.3 Placement Considerations
Install the unit in a location that is easily accessible for maintenance, protected from freezing, and close to the primary points of use to minimize heat loss in plumbing lines.
Figure 3.3: Example installation of the ANZZI Envo tankless water heater in a garage setting, demonstrating its compact wall-mounted design.
Figure 3.4: Example installation of the ANZZI Envo tankless water heater in a bathroom, illustrating its discreet placement near a shower and sink.
4. Operating Instructions
Once properly installed and connected to power and water, your ANZZI Envo tankless water heater is ready for operation.
4.1 Powering On/Off
- To power on the unit, ensure the circuit breakers supplying power to the unit are in the 'ON' position. The LED display should illuminate.
- To power off, turn off the circuit breakers.
4.2 Setting Water Temperature
- Use the 'Up' and 'Down' arrow buttons on the LED display to adjust the desired output water temperature.
- The display will show the set temperature and the actual output temperature.
- The temperature range is typically between 86°F (30°C) and 125°F (52°C).
4.3 Water Flow Activation
The unit activates automatically when water flow is detected. Hot water will begin to flow after a short delay as the heating elements engage.
Figure 4.1: A shower operating with hot water, demonstrating the unit's capability to supply continuous hot water for bathing.
5. Maintenance
Regular maintenance ensures the longevity and efficient performance of your tankless water heater.
5.1 Descaling
Mineral deposits (scale) can accumulate inside the heating elements, especially in areas with hard water. Descaling should be performed annually or as needed by a qualified professional.
5.2 Inspecting Connections
Periodically check all water and electrical connections for leaks or signs of wear. Address any issues promptly.
5.3 Cleaning the Exterior
Clean the exterior of the unit with a soft, damp cloth. Do not use abrasive cleaners or solvents.
6. Troubleshooting
Before contacting customer support, review the following common issues and their potential solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| No hot water / Unit not turning on | No power; Circuit breaker tripped; Insufficient water flow. | Check circuit breakers; Ensure adequate water flow (minimum GPM); Verify electrical connections. |
| Water is lukewarm / Not hot enough | Inlet water temperature too low for flow rate; Temperature setting too low; Scale buildup. | Reduce water flow at the faucet; Increase temperature setting on the unit; Consider professional descaling. |
| Error code on display | Internal fault; Sensor issue. | Refer to the specific error code in the full product manual (if available) or contact ANZZI customer support. |
| Water leakage | Loose plumbing connections; Damaged internal component. | Tighten connections (ensure power is off); Contact a qualified plumber or ANZZI support. |
7. Specifications
| Feature | Specification |
|---|---|
| Brand | ANZZI |
| Model Number | WH-AZ021-M3 |
| Heat Output | 21 Kilowatts |
| Voltage | 240 Volts |
| Wattage (Input) | 18000 watts |
| Special Features | LED Display, Overheat Protection |
| Color | Green |
| Efficiency | High Efficiency |
| Mounting Type | Wall |
| Product Dimensions | 3.54 x 10.24 x 15.16 inches |
| Item Weight | 16.63 pounds |
| Certification | ETL |
| UPC | 191042063419 |
| Manufacturer | SW CORP |
8. Warranty and Support
For warranty information, product registration, or technical support, please refer to the official ANZZI website or contact their customer service department directly. Keep your proof of purchase for warranty claims.
Visit the ANZZI Store on Amazon for more information.
