warmtec EcoSink+ 3,5 kW Tankless Electric Water Heater User Manual

warmtec EcoSink+ 3,5 kW Tankless Electric Water Heater

Product Information

The Tankless Electric Water Heater is a compact and efficient appliance that provides a continuous supply of hot water. It features a high-strength ABS splash-proof casing and a stainless steel heating element. With its stand-by heating loss and energy-saving design, this water heater ensures efficient operation while saving energy.

The heater is equipped with a micro-computer control system and patented heating technology. It has a built-in pressure relief valve at the water outlet to prevent explosion and offers overheating protection, dry-heating protection, and electricity leakage protection functions for added safety. The appliance also has an automatic start function when the temperature drops to a certain level, preventing scalding.

The Tankless Electric Water Heater is available in different models with varying voltage, wattage, and working pressure. It can be easily installed above or under the sink, and it comes with a power cord and plug for convenient installation. The product dimensions and water connections are specified in the technical data section below.

Product Usage Instructions

Installation Guideline

1. Ensure that the appliance is intact and all fittings are complete.
2. Check if the main power supply, water pressure, grounding condition, ammeter, and wire meet the installation requirements.
3. Connect the appliance to a properly grounded dedicated branch in compliance with the National Electrical Code and local electrical and plumbing codes.

Important Safety Instructions

1. The installation must be in compliance with the National Electrical Code, and your local electrical and plumbing codes.
2. This appliance must be EARTHED.
3. Use this water heater only for its intended use as described in this manual.
4. Contact a qualified electrician to have the unit properly installed for the models which are not equipped with a plug.
5. 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.
6. This appliance MUST be permanently connected to the fixed circuit breaker and it must be installed vertically (excluding the models that are equipped with a plug). DO NOT install this appliance near to tinder or strong magnetic field place.
7. This appliance is forbidden to be switch on if you think it may be frozen, as this could result in serious damage to the unit. Wait until you are sure that it has completely thawed out before you switch it on.
8. Please feel the outlet hot water temperature with your hand to make sure it is suitable for showering before taking a shower to avoid getting scalded.
9. Before connecting pipes to the water heater hoses, it is extremely important to FLUSH the pipes to wash away all plumbing paste or residue in the pipes.
10. If there is damage to the wire, you must contact a qualified electrician to replace it with a dedicated wire from our authorized dealers.
11. A check valve is required to be installed at the water inlet.
12. The water relief valve should work periodically in order to remove calcium carbonate deposits.
13. The drain pipe that is connected to the water relief valve should be installed continuously downward in a frostless environment.

WARNING: Do not switch on if there is a possibility that the water in the heater is frozen.

Product Features

This Mini tankless electric water heater differs from conventional storage- type mini water heaters. It doesn’t store hot water. Instead, water is heated instantaneously as it flows through the unit. The powerful heating elements are activated by a flow switch as water is drawn from a main water faucet connected to the appliance. Due to the absence of standby loss, the mini has greater energy efficiency than storage-type water heaters. The units are incorporated with multi-safety devices and will continuously supply hot water as long as the faucet is open.

Besides, the unit has the following features.

1. Tankless, instantaneous heating for on-demand hot water, No pre-heating. No stand-by heating loss. energy-saving.
2. High-strength ABS splash-proof casing, stainless steel heating element.
3. Compact appearance and an unlimited supply of hot water.
4. Easy installation, the heater can be installed above or under the sink. The power cord and plug are equipped
5. Easy operation, the heater provides hot water at a constant temperature.
6. Micro-computer control, Adopting patent heating technology. Water is completely separated from electricity by multi-layers of composite nano-insulation material.
7. Over temperature protection: when the outlet water temp. reaches or over 65°C, the appliance will avoid getting scalded and will start to work automatically while temp. drops to a certain temperature.
8. There is a built-in pressure relief valve at the water outlet to prevent an explosion.
9. There is overheat protection, dry-heating protection, and electricity leakage protection function.

Electrical Diagram

Model

| EcoSink+

3,5 kW

| EcoSink+

5,5 kW

| EcoSink+ 7

kW

---|---|---|---
Voltage| 230VAC
Wattage| W| 3500| 5500| 7000
Rated Current| A| 15.2| 24| 30.4
Min. required circuit breaker| A| 16| 32A| 40A
Min. wire size| mm2| 1.5mm2| 2.5mm2| 4mm2
Min. water flow to activate unit| L/min| 1.5
Working pressure| 0.02-0.6MPa
Weight| kg| 2.31
Product Dimensions| mm| 26523590
Water connections| G1/2”

Technical Data

Electrical  Diagram

Product Inner Structure

Installation Guideline

The installation must be in compliance with the National Electrical Code, and your local electrical and plumbing codes.

1. Make sure the appliance is intact, and the fittings are complete.
2. Please make sure the main power supply, water pressure, grounding condition, ammeter, and wire reach the standard of installation requirement.
3. The appliance must be connected to properly grounded dedicated branch circuits of proper voltage rating. Ground must be brought to the “ground” at the circuit breaker panel.
4. This appliance MUST be permanently connected to the fixed circuit breaker. If you don’t use the heater, please switch off the circuit breaker.
5. DO NOT install this appliance near to tinder or strong magnetic field place. The appliance can be installed above or under the sink, and the unit must only be mounted in a VERTICAL position near the water fittings. Please electrify the machine after getting through the waterway.

Installation Method

General
The Mini tankless electric water heater can be used for hand washing, the kitchen and it can be installed above or under the sink.

Mounting the unit
Locate an appropriate place on a section of the wall as above mentioned.

1. The front and back of the appliance
2. Please remove the metal hanging plate from the back of the appliance.
3. Put the bracket on the wall, and mark on the wall through the holes,
4. Drill 5 holes of 6.00mm diameter: Put plastic anchor in the holes, then use a screw to fix the bracket in the wall.
5. Then fix the appliance with a nail in another hole, to make sure the whole appliance is installed on the firm.

Water Connections

1. All water pipes must comply with national and applicable state and local water pipe codes.
2. No matter install the appliance is upright or handstand, Please connect the inlet connection (blue arrow points to) to the cold water inlet pipe; connect the outlet connection (red arrow points to) to the hot water outlet pipe .
3. The unit should be connected directly to the main water supply. Flush pipe with water to remove any debris or loose particles. The following pics are for your reference.
4. It is required to use G1/2” water connections to fit the appliance. Please connect the inlet and outlet pipe in perspective. The following pictures are for your reference.
5. Please remember to install rubber seal rings at the connections. When all water connections are completed, check for leaks and take corrective action before proceeding.

Electrical connection

1. All electrical work must comply with national and applicable state and local electrical codes
2. All units must be connected to a properly grounded dedicated branch circuit of proper voltage rating.
3. While feeding the cable to the terminal blocks/Circuit Breaker, please make sure the metal wire ends and the terminal blocks touch completely. Then tighten the screws up to make sure the full current can go through.
4. Before beginning any work on the electric installation, be sure that the main breaker panel switch is OFF to avoid any danger of electric shock, all mounting and plumbing must be completed before proceeding with electrical hook-up.

Operation Instructions

1. Turn on the circuit breaker to bring electrical power to the unit. The LED digital display screen will light.

2. Turn on the water faucet for a few minutes until the water flow is continuous and all air is drained from the water pipes. The unit must be operated after the breaker is turned on.

3. After the unit is supplied with power, please turn on the water and then the appliance will start work. The minimum water flow to activate the unit is 1.5L/min.

4. Turn off the water flow, the appliance will stop working. It is not necessary to turn off the heater by pressing any key on the front panel.

5. Single touch “ ” to turn ON/OFF the appliance. When the unit is ON, the LED
   displays the setting temperature for 2 seconds and then displays the actual outlet water temperature. stop operating for 15 seconds, the screen switch to the screen saver mode. the display screen will be lit off. If there is a touch to the screen, the screen will light again.

6. Single touch to adjust the outlet temperature. The temperature setting range is 30–55°C.

   • If the unit has been paused, you may initially get a short burst of very hot water while you turn it on again. Please run the water through for a few seconds to let the temperature settle down. Please check the hot water with your hand before you take a shower.
   • If the unit will not be used in winter, drain out water completely so that the heater will not be frozen.
   • Please periodically clean the inlet strainer and the shower to keep a free water flow.

7. In off mode, touch at the same time, and hold on for 5 seconds, the LED digital display will be upside down.

8. There is an automatic memory function to avoid repetitive operation, while you turn on the appliance, the default set temperature will be the same as last time set.

9. There is an overheat protection function for the appliance, while the outlet temperature
   reaches 65°C, the appliance will enter into pause mode, only after the hot water temp. drop to 50°C, it will start to work again automatically.

10. There is a dry heating protection function for the appliance, while the hot water
    temperature reaches 75°C, the power will be cut off, only after the faults are removed.

11. There is a real-time leakage detection function, while there is an electricity leakage, the appliance will stop working automatically and E2 appear on the LED screen.

12. Please check hot water with your hand before you take a shower.

    • If the unit will not be used in winter, drain out water completely so that the heater will not be frozen.
    • Please periodically clean the inlet strainer and the shower to keep a free water flow.

Troubleshooting

1. Inlet and outlet

fittings leaking

| A.     Fittings not tight

B.     Rubber washer worn-out

| A.     Tighten fittings.

B.     Change the rubber washer.

2. LED no signal| A.     Power not connected.

B.     LED damaged.

| A.     Connect power to the unit.

B.     Change LED.

3. Functional keys not working| A.     No water out from the shower.

B.     Water pressure too low.

C.    Key or PCB damaged.

| A.     Open the valve to get water.

B.     Open the valve to get pressure.

C.    Change key or PCB.

4. Water too hot| A.     Too high temperature set.

B.     Water flow is too small.

| A.     Set a lower temperature.

B.     Increase inlet water flow.

5. Water too cold| A.     Low temperature set.

B.     Water flow too much.

| A.     Set a higher temperature.

B.     Reduce water flow.

6. Outlet water gets

smaller and smaller.

| Inlet      strainer     or      shower

clogged.

| ****

Clean the strainer and shower.

7. LED displays E1| Outlet temp. is over 75℃.| A, Reduce the temperature

B, Turn up the water flow

10. LED displays E2| Electricity leakage| Please contact the local

dealer

9. LED displays E3| A, the connecting wire is loose. B, Temperature sensor failure| A, Plug in the connecting wire tightly.

B, Replace the temperature

sensor

---|---|---

Normal Maintenance

Note: Do not attempt to repair this water heater yourself, call a service person for assistance. Before this operation, the power supply needs to be shut off.
It does not require any regular maintenance. However, to ensure consistent water flow, it is recommended following maintenance.

1. Periodically remove scale and dirt that may build up at the aerator of the faucet or in the shower head.
2. There is a built-in filter screen at the inlet connection which should be cleaned from time to time. Please turn off the water flow before doing this.

Packing List

Operation and Installation

instructions

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