APUS Tankless Electric Water Heater 4500W

1. Introduction

This manual provides essential information for the safe and efficient operation of your APUS 4500W Tankless Electric Water Heater. Please read all instructions carefully before installation and use, and retain this manual for future reference.

2. 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.

• This appliance must be installed by a qualified electrician and plumber in accordance with all local electrical and plumbing codes.
• Ensure the electrical supply matches the unit's requirements (240V, 30A double-pole breaker, 12AWG wire).
• Do not operate the water heater if water is not flowing through it.
• The unit is designed for single-point-of-use applications (e.g., kitchen sink, bathroom sink, laundry sink) and is not intended for whole-house or showering use.
• Features built-in overheating protection, dry-burn prevention, anti-leakage technology, and an advanced internal shockproof system for enhanced safety.
• Always disconnect power before performing any maintenance or service.

3. Product Overview

The APUS 4500W Tankless Electric Water Heater provides instant, on-demand hot water for various single-point applications. Its compact design allows for installation in small spaces, such as under sinks or in cabinets. The unit features a digital LED display for precise temperature control and incorporates advanced safety mechanisms.

Key Features:

• Instant Hot Water: Delivers hot water within 3 seconds, eliminating preheating time.
• Temperature Range: Adjustable from 85°F to 131°F (29°C to 55°C).
• Energy Efficiency: Self-modulating technology adjusts power based on water flow and temperature, achieving up to 99.8% efficiency.
• Compact Design: Ultra-slim dimensions (8.7" x 6.5" x 2.6") for flexible installation.
• LED Digital Display: Touch control interface for easy temperature adjustment.
• Durable Heating Element: Cast aluminum heating element resists corrosion and scale buildup.

4. Installation Guide

Professional installation is recommended for this appliance. Ensure all local codes and regulations are followed.

4.1. Mounting the Unit

1. Select a suitable location for installation, preferably under a sink or in a cabinet, ensuring adequate space and access for maintenance.
2. Use the provided installation guide card to mark the drilling points on the wall.
3. Drill holes at the marked locations and insert the rubber anchors.
4. Secure the hanging board to the wall using screws.
5. Hang the water heater vertically onto the hanging board.
6. Install mounting screws to the bottom holes to secure the unit.

4.2. Connecting Water Pipes

1. Remove the protective plugs from the water inlet (blue) and water outlet (red) connectors.
2. Wrap PTFE tape around the threads of both the water inlet and outlet.
3. Connect the water inlet pipe (cold water supply) to the blue connector and the water outlet pipe (hot water to faucet) to the red connector. Ensure all connections are tight to prevent leaks.
4. Flush the water pipes to remove debris before connecting to the heater.
5. Open the hot water faucet to allow water to flow through the heater and expel any air before turning on the power.

4.3. Electrical Wiring

The APUS 4500W water heater requires a 240V electrical supply with a dedicated 30A double-pole breaker and 12AWG wire. Consult a qualified electrician for proper wiring.

• Connect the brown wire (L1) as the live wire.
• Connect the blue wire (L2) as the neutral wire.
• Connect the green-and-yellow wire (G) to the ground terminal.

5. Operating Instructions

The APUS water heater features an intuitive LED digital display for easy operation.

5.1. Power On/Off

• Ensure the unit is properly installed and connected to the water and electrical supply.
• Press the power button (⏻) on the LED display to turn the unit on or off.

5.2. Temperature Adjustment

• Use the up (⌃) and down (⌄) arrow buttons on the LED display to adjust the desired water temperature.
• The temperature can be set between 85°F and 131°F (29°C and 55°C).
• The display will show the current temperature setting.

6. Maintenance

Regular maintenance ensures optimal performance and longevity of your water heater.

• Cleaning: Periodically wipe the exterior of the unit with a soft, damp cloth. Do not use abrasive cleaners or solvents.
• Scale Prevention: The cast aluminum heating element is designed to resist scale buildup. However, in areas with hard water, periodic inspection and descaling by a qualified professional may be necessary to maintain efficiency.
• Water Connections: Periodically check water connections for any signs of leaks. Tighten if necessary.
• Winterization: If the unit is in an area subject to freezing temperatures and will not be used for an extended period, drain the unit completely to prevent damage.

7. Troubleshooting

If you experience issues with your APUS water heater, refer to the following common problems and solutions:

For issues not listed here or if troubleshooting steps do not resolve the problem, please contact APUS customer support.

8. Specifications

9. Warranty and Support

APUS is committed to providing reliable products and excellent customer service. For warranty information, technical assistance, or any inquiries, please contact our customer support team.

• Customer Service: Available 24/7 for worry-free ownership.
• Contact Information: Refer to the product packaging or the official APUS website for the most current contact details.