ThermoFlow Elex 8.5 Instruction Manual

Electrically Controlled Tankless Water Heater
Installa�on uide, ser anual, and Warranty nforma�on
TM
Electrically
Controlled
Tankless Water
Heater
Elex 8.5 / Elex 12 /
Elex 15 / Elex 18 /
Elex 21 / Elex 24
TM

02 Electric Tankless Water heater - Installation Maunal and User Guide
Contents
Use of the manual
Mounting instructions
User manual
Maintenance
Trouble shooting
Warranty conditions
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5
19
21
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25
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Electric tankless Water heater - Installation Maunal and User Guide
Congratulations and thank you for choosing our instant water heater.
The instruction contains important information about commissioning,
switching the device on and maintenance. To ensure your safety and
that of others we recommend you read through this safety manual care-
fully. Please refer to the back of the manual for details about thewarran-
ty. Keep this manual for future reference.
If you lose the maunal, contact your local distributor or manufacturer.
When you call, please tell us the model number and the serial number of
your unit written on the rating plate of the water heater.
Use of the manual
Symbols used in this maunal
The following symbols are used in this maunal and on the appliance:
Fail to observe this instruction may expose you or others to danger.
Fail to observe this instruction may lead to damage to the device.
Indicates live parts.
Fail to observe this insturction may lead to damage to the device or damage
or others.
Please read the manual
Hazardous materials and waste electrical and electronic equipment
should be taken to a designated recycling location.
TM

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Use of the manual
This appliance can be used by children aged from 8 years and above
and persons with reduced physical, sensory or mental capabilities if
they are supervised during use of the appliance and under stand the
hazards involved.
This is not a toy. Children shall not play with this appliance.
Standards and regulations
The installation (plumbing and electrical work), commissioning and
maintenance of this appliance should only be undertaken by person-
nel with electrical qualifications and in accordance with the relevant
standards and codes and this manual.
Correct and reliable operation of this unit will only be ensured if the
original accessories and spare parts are used.
The following should also be observed:
the appliance name plate;
the technical specifications.
Connection to the water supply
Compatible cold water pipe material: steel, copper and plastic.
There is no need to install a relife valve.
Compatible hot water pipe material: copper, approved plastic piping
systems.
Electrical installation
This unit may only be connected to a fixed cable.
This appliance must be connected to a dedicated breaker.
Electric Tankless Water heater - Installation Maunal and User Guide
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Mounting instructions
Contents
1 device (Elex 8.5 / Elex 12)
1 mounting template
1 bag of installation materials, contects:
1 filter mat
 4 spacers
 1 gasket
 4 screws
 4 anchors
Contents
1 device (Elex 15 / Elex 18 / Elex 21 / Elex 24)
1 mounting template
1 bag of installation materials, contects:
①1 inlet connector kit (combined with filter mat)
②1 outlet connector
③2 gaskets
④ 4 spacers
⑤ 4 anchors
⑥ 4 screws









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Electric tankless Water heater - Installation Maunal and User Guide
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Mounting instructions
Unpacking
Check if the device has been damaged in any way.
Environment
To prevent damage during transport this unit is shipped in sturdy
packing. Please recycle the packaging where possible.
Disposal of the appliance
Old appliances must not bedisposed of in your household waste!
Please bring old appliances to the appropriate recycling center nearest to
you.
Tools
You will require the following tools for installation:
• Phillips-head screwdriver
• Open-ended wrenches
• Teflon tape
• Drill
• Stone or concrete drilling bits
• Pencil
• Adhesive tape
• Wire strippers
All the devices require a single phase 220-240V supply .
If the electrical installation does not meet these requirements then it will
need to be modified. This should be done by a qualitied electrician in
accordance with the relevant regulations (IEC, NEC, etc.)
Preparing for installation
The water and electrical supply need to be available at the place where
the device is to be supplied. If the electricity cable is buried in the wall then
use the supplied spacers. If the electrical cable is fixed to the wall then the
device can also be fixed straight to the wall.
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Electric tankless Water heater - Installation Maunal and User Guide
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Mounting instructions
1
2
Elex 8.5 / Elex 12
A1. A2.
A3. A4.
MOUNTING TEMPLATE
Connection to wall
Warm water connection Cold water connection
Input electric cable
Connection to wall
Connection to wallConnection to wall
Minimumdistance to the ceiling Mindestabstand zur Decke
4” 4”
4”
8”
Minimumdistance from wall
Mindestabstand zur Wand
Minimumdistance from wall
Mindestabstand zur Wand
5/16”
5/16”
Minimumdistance to the ground
Mindestabstand zum Boden
5/16”
5/16”
Display plug

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Mounting instructions
max. 1”
A5. A6.
A7. A8.
1”
6”

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Electric tankless Water heater - Installation Maunal and User Guide
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Mounting instructions
A9. A10
A11.
inlet
outlet filter mat
gasket
L1 L2
3
1
2
Display plug
Push the button
to reset the switch

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Mounting instructions
Elex 15 / Elex 18 / Elex 21 / Elex 24
B1. B2.
B3. B4.
1
2
2
1
1
2
Display plug
Inlet Connector
Outlet Connector
Gasket
Gasket
MOUNTING TEMPLATE
Minimum distance from wall Minimumdistance from wall
Warmwater connection Cold waterconnection
Minimum distance to the ground
Minimum distance to the ceiling
Connection to wall Connection to wall
Input electric cable
Screws, washersand anchors
5/16” mm 5/16” mm
4”
8”
4” mm
4” mm 4” mm
5/16” mm 5/16” mm

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Mounting instructions
B5. B6.
B7. B8.
max. 1”
4”
2”
pipe wall
pipe wall
Don’t over-tighten the connections!
Use a spanner!
Max 18 Nm
Arrow on the inlet connector
must be installed outward
from the wall!

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B9.
1”
6”
Mounting instructions
B12.
inlet
outlet
B11.
3
2
1
Display plug
B10.
L1 L2 L1 L2
Push the button
to reset the switch

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Mounting instructions
See image A1, A2
Remove the screw with a philips-head screwdriver and open the top
cover. Remove the display plug and remove the top cover and put
aside.
See image A3, A4
1. Use two pieces of tape to fix the template on the wall where the device
is to be installed.
2. Drill four 5/16” holes through the template, as indicated in A4.
See image A5, A6, A7, A8, A9
1. Insert the anchors into the holes drilled at last step.
2. Install the appliance with the supplied screws and spacers.
3. Install the hot water pipe to the left, and install the cold water supply
to the right. Make sure the connections are watertight! To prepare the
connection to the water supply, Teflon tape must be used for sealing the
threads.
4. Cut the cable to the required length and connect it to the terminal
block, press the button to reset the switch, as A8 and A9 shown.
The electrical connection should be made by a qualitied electrician, in
accordance with the relevant regulations (IEC, NEC, etc.)
This appliance must be earthed properly!
Circuit breaker must be installed!
See image A10, A11
1. Insert the display plug.
2. Install the top of the housing.
3. Insert the screw at the bottom.
4. Switch on the circuit breaker, turn on the appliance and open the
hot water tap, wait for about 20 secs before the appliance start work-
ing.
The appliance must be earthed properly!
The filter mat contained in accessory bag must be installed
when connecting with inlet(cold) water pipe or hose!
Circuit breaker must be installed with the appliance, please
take page.15 to 17 for the selection of circuit breaker.

Mounting instructions
See image B1, B2
Remove the screw with a philips-head screwdriver and open the top
cover. Remove the display plug and remove the top cover and put
beside.
See image B3
Install the supplied plumbing components as illustrated. The filter mat
must be installed on the inlet of the appliance.
See image B4, B5
1. Use two pieces of tape to fix the template on the wall where the device
is to be installed.
2. Drill four 5/16” holes through the template, as indicated in B4.
3. Install cold water inlet connecter and filter mat to cold water supply (in
the wall) on the right, and hot water outlet connecter to hot water supply
(in the wall) on the left, as shown in B5. Teflon tape must be used for
sealing the threads. Make sure the arrow on the inlet connector outward
from the wall.
See image B6, B7, B8, B9, B10
1. Insert the anchors into the holes drilled at last step.
2. Install the appliance with the supplied screws and spacers.
3. Install the hot water pipe to the left, and install the cold water supply
to the right. Make sure the connections are watertight! To prepare the
connection to the water supply, Teflon tape must be used for sealing the
threads.
4. Cut the cable to the required length and connect it to the terminal
block, press the button to reset the switch, as B9 and B10 shown.
The electrical connection should be made by a qualitied electrician, in
accordance with the relevant regulations (IEC, NEC, etc.)
This appliance must be earthed properly!
Circuit breaker must be installed!
See image B11, B12
1. Insert the display plug.
2. Install the top of the housing.
3. Insert the screw at the bottom.
4. Switch on the circuit breaker, turn on the appliance and open the
hot water tap, wait for about 20 secs before the appliance start work-
ing.
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Mounting instructions
Technical specifications
Instant water heater model
Electric supply
Nominal power rating
Elex 8.5
220-240V 50/60Hz
8.5 kW
Elex 12
220-240V 50/60Hz
Nominal current
Flow rate (∆t=45°F)
Flow rate (∆t=65°F)
Cable size
Temperature range
Switch on flow rate
Non-usage consumption
Protection class
Type of protection
Unit Dimensions
Unit weight
Water connections
Max. pressure water mains
Switch on flow pressure
35-39 A
1.3 GPM
0.9 GPM
10 AWG
104-140 °F
0.58 GPM
<1 Wh/h
I
IP 24
13¾ x 7⅞ x 4¾''
5.4 lb
1/2’’ NPT
115 PSI
15 PSI
50-55 A
1.8 GPM
1.3 GPM
8 AWG
104-140 °F
0.58 GPM
<1 Wh/h
I
IP 24
13¾ x 7⅞ x 4¾''
5.4 lb
1/2’’ NPT
115 PSI
15 PSI
12 kW
Commissioning
• Fill the device and vent it by opening a hot water tap connected to it.
• Only switch on the electrical supply once the device is clear of any
air.
• Check the operation of the device.
Frost
This deviceshould beinstalled in a climate-controlled location,
protected fromfreezing temperatures.
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Circuit Breaker 2-POLE 40A 2-POLE 60A

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Mounting instructions
Technical specifications
ThermoflowTM model
Electric supply
Nominal current
Flow rate (∆t=45°F)
Flow rate (∆t=65°F)
Cable size
Temperature range
Switch on flow rate
Non-usage consumption
Protection class
Type of protection
Unit Dimensions
Unit weight
Water connections
Max. pressure water mains
Switch on flow pressure
Nominal power rating
Elex 15
220-240V 50/60Hz
2 x 32 A
2.3 GPM
1.6 GPM
2 x 10 AWG
104 - 140 °F
0.66 GPM
<1 Wh/h
I
IP 24
18¾ x 10⅛ x 4⅞''
8.4 lb
1/2’’ NPT
115 PSI
15 PSI
15 kW
Elex 18
220-240V 50/60Hz
2 x 38 A
2.7 GPM
1.9 GPM
2 x 10 AWG
104 - 140 °F
0.66 GPM
<1 Wh/h
I
IP 24
18¾ x 10⅛ x 4⅞''
8.4 lb
1/2’’ NPT
115 PSI
15 PSI
18 kW
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Circuit Breaker 2 x 2-POLE 40A 2 x 2-POLE 50A

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Electric tankless water heater - Installation Maunal and User Guide
Mounting instructions
Technical specifications
ThermoflowTM model
Electric supply
Nominal current
Flow rate (∆t=45°F)
Flow rate (∆t=65°F)
Cable size
Temperature range
Switch on flow rate
Non-usage consumption
Protection class
Type of protection
Unit Dimensions
Unit weight
Water connections
Max. pressure water mains
Switch on flow pressure
Nominal power rating
Elex 21
220-240V 50/60Hz
2 x 44 A
3.1 GPM
2.2 GPM
2 x 10 AWG
104 - 140 °F
0.66 GPM
<1 Wh/h
I
IP 24
18¾ x 10⅛ x 4⅞''
8.4 lb
1/2’’ NPT
115 PSI
15 PSI
21 kW
Elex 24
220-240V 50/60Hz
2 x 50 A
3.6 GPM
2.6 GPM
2 x 8 AWG
104 - 140 °F
0.66 GPM
<1 Wh/h
I
IP 24
18¾ x 10⅛ x 4⅞''
8.4 lb
1/2’’ NPT
115 PSI
15 PSI
24 kW
TM
Circuit Breaker 2 x 2-POLE 50A 2 x 2-POLE 60A

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Mounting instructions
Temperature Rise vs. Flow Rate at 240V
Note: Temperature rise = Hot Water Temp. - Cold Water Temp.
10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0
Temperature Rise F
Flow Rate GMP
Temperature Rise vs. Flow Rate at 240V
Elex 8.5Elex 12
Elex 15
Elex 18 Elex 24 Elex 21

User manual
Commissioning
If the selected outflow temperature is not reached when the tap is fully
opened, then the water flow through the device exceeds the capacity
of the device (ThermoflowTM Elex 8.5/12/15/18/21/24). In this case, the
flow should be reduced with the hot water valve. There is a danger of
scalding at outflow temperatures exceeding 108°F.
Operation
The integrated flow control valve accommodates changes in water
pressure and thus maintains a fairly constant temperature.
This unit is intended for use with shower heads with a low pressure loss.
Mixer taps and thermostatic mixer taps should be of a design compati-
ble withdevices withflow control.
Fittings for vented systems should not be used!
Suggestion: To ensure that the minimum flow (switch-on flow) of a water-
pressure operated device is reached, the pressure loss (head loss) of the
device, fittings, shower head, shower hose and piping should all be
considered wheninstalling the device.
Typical pressure losses at a water flow of approx. 2.6 GPM:
• Mixer tap: 5.8 - 11.6 PSI
• Thermostatic mixer tap: 4.4 - 7.3 PSI
• Shower head: 4.4 - 21.8 PSI
The electronically regulated continuous-flow water heater with automat-
ic temperature adjustment keeps the outflow temperature constant.
This takes place regardless of the feed temperature, up to the
temperature limit.
The device has push-buttons to switch it on and off, and arrow keys to
adjust the heat ing. Blue: decrease heating performance, red: increase
heating performance.
Adjust the temperature settings as desired.
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Electric tankless water heater - Installation Maunal and User Guide
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User manual
Without a temperature limiter, high temperatures may be reachedat usage
points. Keep children away from the usage points.
Danger of scalding!
The device should be isolated from the electric supply before any work is
done on livecomponents.
Disconnect this appliance from the power source in a safe way.
The main water valve should be closed before any work is done on the
water pipe.
If the water supply is interrupted, e.g. due to maintenance on the main
water supply, then the following steps should be undertaken before return-
ing the deviceto operation:
1. Turn off power to device.
2. Open a hot water valve connected to the device until the air is vented
from both the deviceand the cold water supply pipe.
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