Westinghouse Electric Tankless Water Heater User Manual

Product Overview

This manual provides essential information for the safe installation, operation, and maintenance of Westinghouse Electric Tankless Water Heaters. The following models are covered:

• ET011K
• ET014K
• ET018K
• ET024K
• ET027K

Unlike conventional storage water heaters, tankless models heat water instantaneously as it flows through the unit, offering greater energy efficiency. The units are designed for domestic hot water supply in homes, apartments, and certain commercial applications.

Safety Information

Safety Definitions

• ❗ DANGER: Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
• ⚠️ WARNING: Indicates a hazardous situation that, if not avoided, could result in death or serious injury.
• ? CAUTION: Indicates a hazardous situation which, if not avoided, could result in property damage and minor or moderate injury.
• ℹ️ NOTICE: This symbol indicates important information where there is no risk to people or property.

General Information

• Read this entire manual. Failure to follow guides, instructions, and rules could cause personal injury or property damage.
• Improper installation, adjustment, alteration, service, or use can result in serious injury.
• This unit must be installed by a licensed electrician and plumber.
• Installation must comply with all national, state, and local plumbing and electrical codes. Proper installation is the installer's responsibility. Failure to comply voids the warranty.
• Save these instructions for future reference.

Important Safety Messages

Observe all safety information and regulations. Operate the appliance only when fully installed and with all safety equipment fitted.

Intended Use

The appliance is intended for heating domestic hot water and can supply several draw-off points. Any other use is inappropriate and may void the manufacturer's warranty.

Safety Precautions

• DANGER: Electrocution Before any installation, adjustment, alteration, or service, turn off all circuit breakers and disconnect switches. Never remove the appliance's cover unless the electricity is turned off. Failure to do so could result in personal injury or death. The appliance must be properly grounded.
• DANGER: Burns Water temperatures over 125°F (52°C) can cause severe burns or death from scalding. Set the thermostat lower (e.g., 113°F/45°C) for households with small children, disabled, or elderly persons.
• WARNING: Injury Children or persons with limited physical, sensory, or mental capabilities should only control the appliance under supervision or after appropriate instruction. Ensure children do not play with the appliance.
• WARNING This product may expose you to lead, known to cause cancer and birth defects or reproductive harm in California. Visit www.P65warnings.ca.gov for more information.

General Information

Introduction and Explanation

These units supply hot water for houses, apartments, or commercial applications. Unlike storage heaters, they heat water instantaneously, offering greater energy efficiency. The temperature is controlled electronically, delivering water between 68°F (20°C) and 140°F (60°C). The optimal setting for efficiency and durability is between 86°F (30°C) and 120°F (50°C).

Dimensions and Connection Points

Diagrams illustrate the dimensions and connection points for the ET011K/ET014K models (14.2" H x 9.5" W x 3.5" D) and the ET018K/ET024K/ET027K models (17" H x 13" W x 4.3" D).

Technical Parameters

Component Diagram

Diagrams illustrate the internal components of the water heaters. Key components include: Heating element, Thermostat, Cooling fin, Hot water connection, Cold water connection, Bottom case, Wave filter, Transformer, Silicon controlled rectifier, Terminal block, Control board, and Cord clamp. Specific diagrams are provided for ET011K, ET014K, ET018K, and ET024K/ET027K models.

Installation

Installation Instructions

• ⚠️ WARNING: High voltage electrical installations require professional electricians. Installation must comply with the National Electrical Code and local codes.
• ℹ️ NOTICE: Unit must be installed vertically with water fittings pointing downward.
• ⚠️ WARNING: Do not install where the unit would be splashed with water, as electric shock may result.
• ? CAUTION: Hot water outlet pipes can be hot. Insulate pipes below 36" (0.9 m) to prevent burns.
• ℹ️ NOTICE: Do not install in locations exposed to temperatures below 36°F (2°C). Drain the unit if freezing is possible. Failure to do so voids warranties. Locate the unit where water leakage will not cause damage, or use a drain pan.

Guidelines You Need to Be Aware of

• This unit is designed for indoor installation but can be used outdoors if mounted in a suitable enclosure protecting it from rain, splash water, freezing temperatures, direct sunlight, debris, and insects.
• Install as close as possible to the main hot water draw-off points.
• Install in a frost-free area. Remove the unit before freezing temperatures if frost might occur.
• Maintain a minimum of 5" (120 mm) clearance on all sides for servicing.
• DO NOT install under water pipes or air conditioning lines that might leak.
• DO NOT install above electrical boxes or junctions.
• Ensure the product is intact and complete with accessories.
• Verify the main power supply, water pressure, grounding, and wires meet installation requirements.
• The unit must be installed in a circuit suitable for overcurrent and grounded at the breaker panel.
• The unit must be permanently connected to a fixed circuit breaker. Turn off the breaker if not using the unit. Do not install in areas with fire hazards or strong magnetic fields. Connect water first, then electricity.

Prepare for Installation

Parts included: Water Heater, User Manual, Assembly Kit, Mounting template.

Tools needed (Not included): Phillips screwdriver, Hammer, Hammer Drill With Concrete Bits, Ruler, Gloves, Pencil.

Installation Dimensions

Diagrams show mounting hole dimensions for ET011K/ET014K (12.87" height, 7.88" width) and ET018K/ET024K/ET027K (14.78" height, 11" width), with 0.5" (11 mm) clearance indicated.

Installation Method

1. Determine mounting location and mark 4 holes on the wall according to the unit or installation guide (Fig.1).
2. Use a hammer drill with concrete bits to create holes (0.24"/6mm diameter, 1.02-1.1"/26-28mm depth) and insert 4-M4 plastic wall anchors (Fig.2).
3. Insert M4 screws into the two upper holes, leaving them slightly loose (0.12-0.2 inches / 3-5mm) (Fig.3).
4. Remove four screws at the top and bottom to open the front cover (Fig.4).
5. For easier installation, unplug the display connect wire from the water heater connector (Fig.5).
6. Hang the unit on the two installed upper screws, secure the two lower screws, and then tighten the two upper screws (Fig.6).
7. After completing plumbing and electrical connections, reconnect the display cable, install the front cover, and tighten the four screws.

Water Connections

• ℹ️ NOTICE: Excessive heat from soldering near the unit may cause damage.
• The cold water connection must be periodically disconnected to clean the filter screen. Use easily detachable connectors like braided steel flex connectors.
• ? CAUTION: Hard water or water with high mineral content may damage the unit; this damage is not covered under warranty.
• All plumbing must comply with national and local codes.
• Install a pressure reducing valve if cold water supply pressure exceeds 150 PSI (10 bar).
• Ensure the cold water supply line is flushed to remove scale and dirt.
• Clean the built-in filter screen periodically.
• The cold water connection (inlet) is on the right side of the unit, and the hot water connection (outlet) is on the left side.

Electrical Connection

• ⚠️ WARNING: Electrocution Before electrical work, turn off all main breaker panel switches. Complete all mounting and plumbing before electrical hook-up. Circuits may require a ground fault interrupter per local codes.
• The unit must be properly grounded according to state, local, or national electric codes. Failure to ground could result in serious personal injury or death.
• Connect to properly grounded dedicated branch circuits of the correct voltage rating. Ground must be connected at the circuit breaker panel.

Circuit Layout

Wiring diagrams show the circuit connections for ET011K/ET014K (single circuit, double pole breaker), ET018K (two independent circuits, two double pole breakers), and ET024K/ET027K (three independent circuits, three double pole breakers). Ensure L1, L2, L1', L2', etc., are connected to the correct breakers as indicated.

Circuit Connection

Refer to "2.3 Technical Parameters" for correct wire and circuit breaker size. Ensure the unit is properly grounded. Feed the electrical connection cable through the Cord clamp. Connect "live" wires to slots marked L1 and L2, and the ground wire to the ground symbol slot.

Terminal Block

Recommended torque for M4 terminal block screws is 100-140 N·cm (8.9-12.4 lbf·in). Proper torque prevents personal loss or property damage.

Commissioning the Water Heater

• ⚠️ WARNING: Open the hot water faucet until water flow is continuous and all air is purged. Install the unit's cover before turning on circuit breakers.
• Fill the unit completely with water.
• Close the cover and secure it with the screw and lock washer.
• Turn on circuit breakers to supply power.
• Adjust the water temperature using the front knob.
• Turn on hot water and wait 20 seconds for temperature to stabilize.
• Check water temperature by hand; reduce if too hot.
• Explain unit operation to the user and familiarize them with its use.
• Advise the user about hazards, such as hot water up to 140°F (60°C). Hand over these instructions for future reference.

Operation

Operation Instructions

• ⚠️ WARNING: Do not store or use gasoline or other flammable vapors and liquids near this or any other appliance.
• If the unit was paused, you may get a short burst of very hot water when restarting. Run water for a few seconds to stabilize the temperature. Check hot water temperature before showering.
• If not used in winter, drain the water completely to prevent freezing.
• Periodically clean the inlet filter and shower head for proper water flow.
• ⚠️ WARNING: Minors are not allowed to operate the water heater themselves unless accompanied by a guardian.

Control Panel Description

The display shows:

• 1. Water flow signal
• 2. Wifi icon
• 3. Water is heating up indicator
• 4. Outlet water temperature
• 5. Fahrenheit display
• 6. Celsius display
• 7. Knob for temperature adjustment

Operating Steps

1. Turn on the circuit breaker to supply power.
2. Open a hot water faucet for a few minutes to purge air from the pipes.
3. After power-on, a "beep" sound indicates standby.
4. Press the ON/OFF button to start.
5. Turn the knob clockwise to increase output water temperature; counter-clockwise to decrease. The temperature range is 86°F - 140°F (30°C - 60°C).
6. Press the knob for 3 seconds to switch between Fahrenheit and Celsius.

Maintenance

Maintenance Procedures

• ? CAUTION: Do not attempt self-repair. Shut off power before any maintenance. Call a technician for assistance.
• To ensure maximum performance, periodically remove scale and dirt from faucet aerators, the unit's filter screen, or heating canisters.
• Periodically check water quality. Water quality impacts longevity and may not be covered by warranty.
• Clean the built-in inlet filter periodically. Shut off the water supply before cleaning.
• If you live in a hard water area, consider a descale device and annually change its filter or follow the manufacturer's instructions.

Important Notes

1. Any maintenance may introduce air into plumbing pipes; purge all air before powering on again.
2. For hard water, increase maintenance frequency and check any descale device.
3. Use only a damp cloth with mild detergent for cleaning. Do not use thinners, alcohol, petrol, or other organic solutions.

Troubleshooting

Fault Assessment and Troubleshooting

Diagnostic Codes

ℹ️ NOTICE: If the unit is still not functioning after troubleshooting, contact after-sales service.

Wiring Diagrams

Wiring diagrams are provided for ET011K/ET014K, ET018K, and ET024K/ET027K models, illustrating the connections to heating elements, display boards, triacs, and circuit breakers.

Packing List

Warranty Policy

What is covered

The Standard Limited Warranty covers defects in materials or workmanship when the product is installed and operated according to instructions in the United States and Canada. Improper installation may void this warranty. Installation by a licensed, qualified, and trained contractor is strongly recommended.

How long does coverage last

*Excludes Alaska, Hawaii, and locations outside the continental US and Canada.

Limitation on warranties

During the warranty period, only genuine Westinghouse parts and qualified professionals should perform repairs. Westinghouse may repair, replace, or refund the product at its discretion. Warranty claims may be denied for defects due to improper installation, use, or operation. No other warranties are expressed or implied. Implied warranties are limited to the duration of this Limited Warranty. Westinghouse is not liable for indirect, incidental, special, consequential, or similar damages.

How To Obtain Service

To make a warranty claim, contact Westinghouse Customer Service at support@tl.westinghouse.com, or via phone/chat. Any return for refund must be approved. Westinghouse covers ground shipping costs for warranty issues in the US and Canada (excluding AK, HI) within the first 30 days. After 30 days, the owner is responsible for shipping to Westinghouse. Westinghouse covers return shipping after repair/inspection. A Return Goods Authorization (RGA) number is required for all shipments. Returns must be in original packaging; missing components may incur a 15% restock fee.

What Is Not Covered

This Limited Warranty does not cover:

1. Products not properly installed and maintained per manuals and codes, or subject to abuse, misuse, alteration, neglect, or misapplication.
2. Damage from services performed by third-party providers.
3. Expenses for labor services (installation/removal).
4. Damage due to improper installation (sizing, length, elevation, airflow) or improper use (freezing, scale build-up, incorrect pressure).
5. Use as a pool or spa heater.
6. Damage from non-potable, untreated, or high-pH/hardness water.
7. Products with removed or altered serial numbers.
8. Increases in electricity costs.
9. Defaults or delays caused by factors outside Westinghouse's control.

Product Details: