Airthereal EVT-9K User manual

USER MANUAL
READ AND SAVE THESE INSTRUCTIONS
EVENING TIDE EVT-9K
9KW ELECTRIC TANKLESS
WATER HEATER

1
CONTENTS
2
2
5
6
8
14
15
17
INTRODUCTION
COMPONENTS
SPECIFICATIONS
IMPORTANT SAFETY INSTRUCTIONS
INSTALLATION GUIDELINE
CONTROLS
TROUBLESHOOTING
LIMITED WARRANTY

COMPONENTS
Cable Entry
Front Cover
Control Key
Cold Water Inlet
LED Display
Hot Water Outlet
2
INTRODUCTION
Congratulations on your purchase and welcome to Airthereal!
To fully benefit from the support that Airthereal offers please register at www.airthereal.com/register
OUTWARD

3
TEMP Sensor
Thermostat
Heating Element
Triac
Transformer
Relay
Connection Plug
To Display
Water Flow Meter
PRODUCT INNER STRUCTURE

4
SCR LEAKAGE
OUT FLOW IN DISP
ELECTRICAL DIAGRAM
CONNECTION
DISP: Connection plug to display
FLOW: Connection plug to the Flow Sensor
IN: Connection plug to the input temperature sensor
OUT: Connection plug to the output temperature sensor

SPECIFICATIONS
5
Remarks:
1. The above wire size and circuit breaker size are for this EVT-9K unit only. If you need other
high-power appliances, please do further research for that.
2. For the best user experience, the EVT-9K unit is recommended for sink use and as a booster
for tank water heaters.
SIZING GUIDE
Please use the chart below to see how many gallons per minute your tankless water heater can
produce with your incoming water temperature. The gallons per minute is calculated assuming
108°F outlet temperature.
EVT-9K
240 V
9.0 kW
40 AMP
37.5 A
8 AWG
0.475 GPM / 1.8 L/min
7.25 PSI - 108.78 PSI
1/2'' NPT
Wall Mounted
Digital Panel
16.14'' x 9.84'' x 2.60''
8.8 Lbs
Model
Voltage
Power
Min. Required Circuit Breaker Size
Max. Amperage
Recommended Wire Size
Min. Water Flow to Activate the Unit
Safe Operating Pressure
Water Connections
Installation
Temperature Setting
Dimensions (LxWxH)
Weight
Inlet Temp (°F)
41
50
59
68
77
Model
EVT-9K
GPM
0.9
1.0
1.2
1.5
2.0
Suggested Usage
Low Flow Faucet
Bathroom Faucet
Bathroom Faucet
Kitchen Faucet
Shower
Outlet Temperature (°F)
108

6
IMPORTANT SAFETY INSTRUCTIONS
WARNING:
When installing or using any high voltage electrical appliance basic safety precautions should always
be followed. Under no circumstance should you attempt to clean, install, inspect, repair, disassemble,
or otherwise service this water heater without first shutting off all power to the unit directly at the
circuit breaker box. SERIOUS BODILY INJURY OR DEATH COULD OCCUR IF YOU IGNORE
THIS WARNING.
THIS PRODUCT SHOULD BE INSTALLED BY A QUALIFIED ELECTRICIAN AND A QUALIFIED
PLUMBER IN ACCORDANCE WITH ALL NATIONAL, STATE, PROVINCIAL AND LOCAL
ELECTRICAL & PLUMBING CODES. PLEASE READ THESE INSTRUCTIONS THOROUGHLY
AND COMPLETELY PRIOR TO INSTALLATION & USE. FAILURE TO DO SO COULD CAUSE
PROPERTY DAMAGE, SERIOUS INJURY, OR DEATH. This manual should be given to the
homeowner after installation and should be retained for future reference.
GENERAL SAFETY
1. Risk of Fire - DO NOT store or use gasoline or other flammable vapors and liquids in the vicinity
of this or any other appliance. Keep rags and other combustibles away.
2. FOR HOUSEHOLD, INDOOR USE ONLY.
3. Risk of electric shock, CONNECT ONLY TO A CIRCUIT THAT ISPROTECTED BY
A GROUND-FAULT CIRCUIT INTERRUPTER (GFCI).
4. This appliance MUST be permanently connected to the fixed double pole circuit breaker and the
appliance must be installed vertically. DO NOT install this appliance near tinder or a strong
magnetic field place.
5. If there is damage to a wire, you must contact a qualified electrician to replace it.
6. The minimum environmental temperature for safe storage and operation of the water heater must
be above 33°F, if not, may cause water heater damage and dangerous conditions.
7. This appliance is forbidden to be switched on if you think it might 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. DO NOT install this hot water unit in a location where it may be subject to freezing temperatures.
IF YOU IGNORE THIS WARNING, THE UNIT MAY GET PERMANENT DAMAGE DUE TO
INTERNAL COMPONENTS FREEZING.

7
Time To Produce a Serious Burn
More than 5 minutes
1 1/2 to 2 minutes
About 30 seconds
About 10 seconds
Less than 5 seconds
Less than 3 seconds
About 1 1/2 seconds
About 1 second
Temperature
120°F
125°F
130°F
135°F
140°F
145°F
150°F
155°F
Water temperature over
125°F can cause severe
burns instantly or death
from scalds.
Children, disabled and
elderly are at highest risk
of being scalded.
See instruction manual
before setting temperature
at water heater.
Feel water before bathing
or showering. Temperature
limiting values are available,
see manual.
If the hot water unit has
been paused during use,
you may initially get a short
burst of very hot water when
you turn it on again. Please
run water through for a few
seconds to settle down the
water temperature.
Water Temperature Safety
Safety and energy conservation are factors to be considered
when selecting the water temperature setting of the water
heater's thermostat. Water temperatures above 125°F can
cause severe burns or death from scalding. Be sure to read
and follow the warnings outlined on the label pictured below.
The chart shown below may be used as a guide in determining
the proper water temperature for your home to prevent burns.
Time/Temperature Relationship in Scalds
DANGER: Households with small children, any disabled
person, or elderly persons may require a 120°F or lower
thermostat setting to prevent contact with overly "HOT"
water. The temperature of the water in the heater is
regulated by the electronic control on the front of the
water heater.
Notice: Mixing valves are recommended for reducing point
of use water temperature by mixing hot and cold water in
branch water lines. It is recommended that a mixing valve
complying with the Standard for Temperature Actuated
Mixing Valves for Hot Water Distribution Systems be installed.

8
INSTALLATION GUIDELINE
MOUNTING
Step 1
Step 2
1. Locate the installation position for the water heater.
2. Place the bracket on the wall and use a pencil to mark the screw hole locations. Make sure the
outlet and inlet are pointed downward vertically.
Drill four 0.24”(6mm) diameter holes on the wall. Insert the plastic anchors into the holes.
8.82 inch
Hole
Plastic Anchor
Drill

9
Step 3
Step 4
Hang the water heater onto the bracket with the outlet and inlet pointed downward.
Make sure the water heater is secure before continuing.
Place the bracket onto the wall and drill mounting screws directly into the plastic anchors to secure
the bracket.
Bracket
ST 4.2*30mm

10
PLUMBING CONNECTIONS
ATTENTION
1. It is recommended that this water heater be installed by a licensed and qualified plumber in
accordance with all applicable national, state, and local plumbing codes.
2. Make sure there are no impurities in the waterway. It is recommended to install a water softener
to prevent the water heater from scaling, which can effectively prolong the service life.
3. Turn on the water source and let the water flow through the water heater for at least 2 to 3 minutes.
This will remove air from the unit and prevent the water heater from scaling during use. This must
be done before powering on the device. Otherwise, the heating element will be severely damaged.
4. When you connect the pipes to the unit, use a wrench to hold the connection point of the unit and
use another wrench to tighten the flexible water hose to the hot water unit. Over tightening must
be avoided.
5. It is recommended to install a manual shut-off valve (not provided) at the inlet water connection of
the water heater to allow for easy shut-off if future maintenance or service is needed.
6. This product does not use a storage tank to maintain hot water, therefore a temperature-pressure
relief valve is not required for most installations.
7. It is required to use 1/2"NPT water connections for the EVT-9K connections.
8. Never use PVC on the hot water outlet. Use CPVC or other high-temperature-rated materials.
INSTALLATION
Step 1
1. Flush the pipe with water to remove any debris or loose
particles before pipe connections to avoid clogging.
2. After flushing the pipe, ensure the water supply is
turned OFF at the shut-off valve.
Step 2
1. Remove the thread protectors and discard them.
- It is required to use 1/2"NPT water connections.
- If it doesn't fit, please use the Pipe Fitting
Adapter. (Not Provided)
2. Connect the inlet cold water line to the cold inlet
fitting on the water heater. Make sure the filter
is installed in the input first.
3. Connect the outlet hot water line to the hot outlet
fitting on the water heater.
4. Do not mistake the water inlet and outlet.
ATTENTION
The filter is to prevent any particles from entering
the unit that may clog or damage the internal parts.
If the machine is blocked, it will stop working.
Water Outlet Water Inlet
FilterGasket
OFF
1/2"NPT Female
Pipe Fitting Adapter
(Not Provided)

11
Step 3
INSTALLATION
1. Open the shut-off valve to allow water to flow into the water
heater.
2. Check for any leaks at plumbing connections. If there are
any leaks from the nipples, firmly tighten with a wrench,
but DO NOT OVERTIGHTEN.
3. Turn on the hot water faucet and allow water to run through
the water heater to purge all the air from the water lines.
This MUST be performed prior to turning on the power at
the unit. FAILURE TO FOLLOW THIS STEP CAN CAUSE
PERMANENT DAMAGE TO THE HEATING ELEMENTS.
4. Check again for any leaks at plumbing connections.
Correct any that are found.
ELECTRICAL CONNECTIONS
ATTENTION
1. Make sure that the breaker is switched OFF before installing the wire to avoid any danger of
electric shock. All mounting and plumbing must be completed before proceeding with the
electrical connection.
2. All electrical work must comply with national and applicable state and local electrical codes.
This water heater must be permanently connected to the direct main breaker panel. The use
of a plug and socket for power is forbidden.
3. The heater must be connected to its own independent electrical circuit. Install a fuse box or
switch (breaker) for the exclusive use of the heater.
4. All units must be connected to a properly grounded dedicated branch circuit with a proper
voltage rating.
Note: This unit should be installed by a qualified professional in accordance with all national, state,
provincial and local electrical & plumbing codes.
If you do not have the correct infrastructure you will need a professional to install a new outlet,
breaker, and/or wiring.
Under no circumstances should you attempt to clean, install, inspect, repair, disassemble or
otherwise service this water heater without first shutting off all power to the unit directly at the
circuit breaker box. Serious bodily injury or death could occur if you ignore this warning.
Confirm that your breaker panel can meet the required specifications
for your unit.
9k: 240V Outlet, 1x 40A Double Pole Circuit Breaker
240V not 120V
HIGH VOLTAGE DANGEROUS

12
Cleaning steps
OPERATING INSTRUCTIONS
CAUTION: Wait until the water is fully flowing through the heater before turning on the breaker.
1. Allow water to flow through the water heater unit. Allow the water to flow continuously to flush out
any debris as well as purge the pipes of any air.
2. Turn on the breaker to power the water heater. A beep sound will be heard and the LED display
will light up. If there is no other display, the appliance will stay in standby.
3. Press the power button on the unit to turn the appliance ON/OFF. When the unit is working, LED
lights will show the Actual Temp.
4. Press + and - to adjust the outlet water temperature. The temperature setting range is 86-131°F
(30-55°C). When heating, the heating icon on the screen will light up.
Caution: If the unit is paused there may be an initial burst of very hot water when resuming.
Please allow the water to flow for a few moments to let the temperature settle. It’s always advised
to test the water temperature with your hand before hopping straight into the shower.
5. If the unit will not be used during the winter completely drain out the water to prevent freezing.
6. Periodically clean the water heater’s inlet strainer, the faucet aerator, and the shower head to
ensure the free flow of water.
8 AWG Wire
L1: Neutral wire (black)
L2: Live wire (red)
1. Turn off the Power
2. Take each wire pair and connect them to one breaker (see wiring diagram). Make sure that each
breaker is connected with one black wire and one red wire.
3. Using a suitable wire gauge that meets all applicable electrical codes for the size of the breakers
used, run the correct sets of wire from the main breaker panel to the tankless water heater.
4. A separate ground conductor is required.
5. Double-check the electrical connections to make sure they are correct and that all wire connections
are tight and secure.

13
1. Use a 10mm Allen wrench to unscrew the screw.
2. Take out the filter, circlip and the water flow rotor in turn.
3. Clean the water flow rotor and filter.
Installation steps
1. Install the water flow rotor into the copper head of the
water inlet.
Note: The rounded bump on the top of the rotor is
facing inward.
2. Install the circlip, filter and screw into the water inlet
in turn.
3. Use a 10mm Allen wrench to lock the screw.
NORMAL MAINTENANCE
Note: Do not attempt to repair this water heater yourself if the unit is not working properly.
Call a technician for assistance. The power supply always needs to be shut off before these
operations are carried out.
To ensure consistent Maximum performance of the unit, it is recommended to follow these instructions:
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 at the inlet connection which should be cleaned from time to time. Please
cut the water supply before cleaning this filter. You can then reverse the inlet and outlet pipe
connection (connect each pipe to the opposite connection) and open the faucet to manually flush
the filter by opening the faucet to its max. After flushing the filter in this way, remember to reverse
the pipes back to the normal connections.
3. If the water heater is not used for a long time (more than 3 months), please clean the water inlet
waterway first in the state of power off ( Not using it for a long time will cause oxidation of the
water pipe, and dirty water will flow out of the boiling water), air and impurities must be removed
before use.
Important Note
1. Any maintenance performed on the water heater unit may introduce air into pipes. It is important
to purge all the air out before powering on again. Failure to do so could cause serious damage to
the heating element.
2. If you have a water supply with high levels of mineralization (hard water), you should increase the
frequency of your maintenance. Check the descaler device regularly to see if it is functional.
3. Do not use paint thinner, alcohol, petrol,or any other chemical solutions to clean the unit.
Use only a damp cloth with mild detergent to wipe away any dirt or debris.
Water Flow Rotor
Runded Bump

CONTROLS
Power On/Off
Decrease/Down
Increase/Up
Not currently working
Working state
Excessive water flow
Leakage of electricity
Temperature exceed 149°F/65°C
Water inlet temperature sensor failure
Water outlet temperature sensor failure
No over-zero signal
Communication failure
5
C
14

TROUBLESHOOTING
Issue
Water heater is not heating
at all (water is flowing but
the unit is not heating - the
outgoing water temperature
is the same as the cold
water supply) - the digital
display does NOT light up.
Water heater is heating,
but the water temperature
is not hot enough.
Leakage in the joint of inlet
and outlet pipe.
The water pressure is less
and less.
Water temperature is
unstable.
Solution
Make sure the breakers at main
electrical panel are ON. You may have
a faulty breaker or unit may be wired
incorrectly.
Replace the screen or reconnect the
wire.
Turn up the temperature setting on
the unit.
Depending on your incoming water
temperature and the power output of
your model, your water flow rate may
exceed the physical heating capacity
of your water heater. Turn down the
water flow.
The set voltage of the water heater is
240v. When the voltage used is lower
than 240v, the water heater will
generate less heating power. It would
require a larger power model. (when
the voltage cannot be changed).
You do not need to mix as much cold
water with your tankless water heater
compared to when you use a
conventional water heater. You may
also have an anti-scald feature on
your faucet that is mixing cold water.
These types of faucets can usually be
adjusted to reduce the amount of cold
water mixed.
Reconnect the pipe.
Replace the washer
Remove the inlet pipe, clean the
inlet filter/shower.
The voltage water pressure is
back to normal.
Possible Reason
No power or incorrect
wiring.
The screen is damaged,
or the screen connection
is poor.
User temperature
setting too low.
Flow rate is too high.
Voltage less than 240
volts.
Mixing too much cold
water.
Poor connection of inlet
and outlet pipe.
The rubber washer is
damaged.
The inlet filter or shower is
blocked by water impurities.
The voltage or water
pressure is unstable.
15

Failure Reason Solution
MALFUNCTION CODE
Stop using the water heater and let a
professional pinpoint the leaking parts.
A. Select a lower power level or turn down
the temperature.
B. Increase water flow.
Check whether the water inlet temperature
sensor terminal is effectively plugged into
the main board.
Check whether the water outlet temperature
sensor terminal is effectively plugged into
the main board.
A. Check that the voltage meets the
installation requirements.
B. There is interference from high-power
equipment nearby.
Contact Airthereal support for assistance.
Leakage of electricity
Temperature exceeds 149°F/
65°C. (It is a high temperature
warning, not a malfunction)
Water inlet temperature
sensor failure
Water outlet temperature
sensor failure
No over-zero signal-The
user's home voltage is low
or the grid input voltage
abnormal.
Communication failure
Error Code
E1 (with 5 beeps
sounds)
E2 (with 5 beeps
sounds)
E3 (with 5 beeps
sounds)
E4 (with 5 beeps
sounds)
E5 (with 5 beeps
sounds)
EC
16

LIMITED WARRANTY
LIMITED WARRANTY
Airthereal warrants all Electric Tankless Water Heaters for 1 year for the main unit and warrants the
Mainboard, relay, Led display, heating element and other major parts for 3 years from the date of
purchase.For more information please visit www.airthereal.com/warranty.
What’s covered?
Defects due to faulty materials and/or workmanship of the product.
What’s NOT covered?
1.Damage caused by the owner when attempting to fix or altering the product by himself or herself.
2.Damage caused by misuse, abuse, neglect, alterations or unauthorized repair.
3.Natural depreciation.
Warranty Period
Warranty becomes effective from the date of original purchase and will last for 1 year.
Who’s covered?
This limited warranty is only effective for the original purchaser. It is non-transferable.
How to request warranty services?
To obtain the benefit of this warranty, please email [email protected].Our customer service
team will address your issue as soon as possible!
17

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2330 Paseo Del Prado STE C304
Las Vegas, NV 89102