Warmtec EcoSink+ User manual

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User manual
Tankless electric water heater

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Please read and follow the installation and operation instructions
carefully, to ensure the long life and reliable operation of this
appliance.
CONTENTS
Important Safety Instructions ------------------------------------------- page 3
Electrical Diagram----------------------------------------------------------- page 5
Technical Data ----------------------------------------------------------page 5
Product Structure------------------------------------------------------------page 6
Installation Guideline-------------------------------------------------------page 7
Operation Instructions -----------------------------------------------------page 10
Trouble-Shooting-------------------------------------------------------------page 11
Normal Maintenance--------------------------------------------------------page 12

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■Important Safety Instructions
1. The installation must be in compliance with the National Electrical Code, 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 unit properly installed for the models which are
not equipped with plug.
5. This appliance is not intended for use by persons (include 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 which are equipped with 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 hand to make sure it is suitable for
showering before taking 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 qualified electrician to replace it with
dedicated wire from our authorized dealers.
11. 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 which connected to the water relief valve should be installed
continuous downward in frostless environment.
WARNING: Do not switch on if there is a possibility that the water in the
heater is frozen.

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■Product Features
This Mini tankless electric water heater differs from a 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
stand-by loss, the mini has greater energy efficiency than storage type water heaters. The
unit 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 unlimited supply of hot water.
4. Easy installation, heater can be installed above or under sink. Power cord and plug
are equipped
5. Easy operation, the heater provides hot water with 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 explosion.
9. There is overheat protection, dry-heating protection, electricity leakage protection
function.

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■Electrical Diagram
■Technical Data
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
265*235*90
Water connections
G1/2”
AC220V-240V
Temperature 
Sensor Flowmeter
R
R
R
3
2
1
Thermal Cut-out
E
Electrical Diagram
Leakage sensor
Temperature 
Controllor
N
L
Remark：R:Resistance T：Triac
T

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■Product Inner Structure
Installation Guideline
The installation must be in compliance with the National Electrical Code,
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 unit must only
be mounted in a VERTICAL position near by the water fittings. Please
electrify try the machine after getting through waterway.

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■Installation Method
●General
The Mini tankless electric water heater can be used for hand washing, kitchen and it can
be installed above or under the sink.
●Mounting the unit
Locate an appropriate place on a section of wall as above mentioned.
1Front and back of the appliance
2Please remove the metal hanging plate from the back of the appliance.

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3Put the bracket on the wall, and mark on the wall through the
holes,
4Drill 5 holes of 6.00mm diameter: Put plastic anchor in the
holes, then use screw to fix the bracket in the wall.
5Then fix the appliance with nail in another hole, to make sure the whole
appliance is installed on firm.
Fig 5-A: Upward Installation FIG 5-B: Upside down Installation

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●Water Connections
1--- All water pipe must comply with national and applicable state and local water pipe
codes.
2--- No matter install the appliance 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. Following pics is for your reference.
4, It is required that use G1/2”water connections to fit the appliance. Please connect the
inlet and outlet pipe in perspective. Following pictures are for your reference.
2, 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.
Fig 6-A: Upward Installation FIG 6-B: Upside down Installation
●Electrical connection
1, All electrical work must comply with national and applicable state and local electrical
codes
2, All unit must be connected to a properly grounded dedicated branch circuit of proper
voltage rating.
3, While fed the cable to terminal blocks/Circuit Breaker, please make sure the metal wire
ends and the terminal blocks to 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 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.

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■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 water flow is continuous and all air is
drained from water pipes. The unite 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 min 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 front panel.
5. Single touch “”to turn ON/OFF the appliance. When the unit is ON, LED
displays setting temperature for 2 seconds, then display the actual outlet water
temperature. stop operating for 15 seconds, the screen switch to the screen
saver mode. the display screen will be light off. If there is touch to the screen, the
screen will light again.
6. Single touch and to adjust the outlet temperature. 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 on again. Please run the water through for a few
seconds to let the temperature settle down. Please check hot water with
hand before you taking 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 inlet strainer and the shower to keep a free water
flow.
7. In off mode, touch and at the same time, 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.

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9. There is 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 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 remove.
11. There is real-time leakage detection function, while there is a electricity leakage, the
appliance will stop working automatically and E2 appear in LED screen.
12. Please check hot water with hand before you taking 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 inlet strainer and the shower to keep a free water flow.
■Trouble-shooting
Problems
Possible Causes
Corrective Actions
1. Inlet and outlet
fittings leaking
A. Fittings not tight
B. Rubber washer worn-out
A. Tighten fittings.
B. Change 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 shower.
B. Water pressure too low.
C. Key or PCB damaged.
A. Open valve to get water.
B. Open valve to get
pressure.
C. Change key or PCB.
4. Water too hot
A. Too high temperature set.
B. Water flow 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 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 with the local
dealer

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■Normal Maintenance
Note: Do not attempt to repair this water heater yourself, call a service person for
assistance. Before these operation, the power supply needs to be shut off.
It is not required 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 inlet connection which should be cleaned from time to
time. Please turn off the water flow before doing this.
■Packing List
Item
Unit
Quantity
Electric Water Heater
Unit
1
Remote control
Optional
1
Rubber plug and screw
Piece
1
Operation and Installation
instructions
copy
1
9. LED displays E3
A, the connecting wire loose.
B, Temperature sensor failure
A, Plug in the connecting wire
tightly.
B, Replace the temperature
sensor