THERMOFLOW Elex 3.5 Mini Instantaneous Water Heater Installation Guide
- June 15, 2024
- thermoflow
Table of Contents
INSTALLATION GUIDE
Mini-Durchlauferhitzer
Elex 3.5
Elex 3.5 & Armatur
A. Oversink
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5
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B. Undersink
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3
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1. Use of the manual
Dear customer, we thank you for your purchase of our Thermoflow device.
These instructions contain important information about commissioning, switching the device on and maintenance. To ensure your safety and that of others we suggest that you read these installation and operating instructions before using the device for the first time. Please keep the instructions and other documentation close to the device.
This device has been manufactured in accordance with the prescribed standards and has been tested by the competent authorities. It has a Safety Certificate and a Certificate of Electromagnetic Compatibility. The technical data for the product is displayed on the sticker between the inlet and outlet pipes.
The appliance should be installed by qualified persons. All repair and maintenance work on the device, for example the removal of limestone and water scale deposits, may only be carried out by duly authorised technical staff. The applicable regulations (German Technical and Scientific Association for Gas and Water (DVGW) Technical Guidelines for Water Systems) and regional requirements must always be duly observed!
This device has been designed for use in modern small apartment blocks, hotels and toilets. Its modern design and the use of carefully selected materials and an improved manufacturing process ensure high quality.
Symbols used in this manual
The following symbols are used in this manual and on the appliance: :
Meets the basic safety standards of the relevant European Directives.
Failure to observe this instruction may expose you or others to danger.
Failure to observe this instruction may lead to damage to the device.
Indicates live parts.
Failure to observe this instruction may lead to damage to the device or danger
to you or others.
Please read the manual.
Hazardous materials and waste electrical and electronic equipment should be taken to a designated recycling point.
This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved.
Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children without supervision.
Declaration of conformity
NEG-Novex GmbH hereby declares that the Thermoflow device complies with the
directives and standards:
- 2014/35/EU Low Voltage Directive
- 2014/30/EU Electromagnetic Compatibility Directive
- 2011/65/EC (RoHs II)
- 2009/125/EC Ecodesign
- (EC) No. 814/2013
And also comply with the provisions of the following European Standards:
- EN 62233
- EN 60335-1
- EN 60335-2-35
- EN 55014-1
- EN 55014-2
- EN 61000-3-2
- EN 61000-3-3
- EN 50581
22-07-2016
NEG-Novex Großhandelsgesellschaft für Elektro- und Haustechnik GmbH
Chenover Str. 5, D-67117 Limburgerhof
2. Mounting instructions
Disposal of the appliance
Old appliances must not be disposed of in your household waste!
Every consumer is legally obliged to dispose of old appliances separately from
their household waste and to take them, for example, to a collection point in
their local community or local district. Old electrical appliances will be
accepted there free of charge. This ensures that the old appliances are
properly recycled and any negative impacts on the environment are avoided.
This is why electrical appliances are marked with the symbol shown above.
Environment
This device is delivered in sturdy packaging in order to avoid damage during
transport. This packaging consists mainly of recyclable materials. We request
that you dispose of the packaging accordingly for recycling.
Installation
The device should be installed in accordance with the drawing on the first
page of the user manual. Any other installation position may result in serious
damage to the device. Installation should take place as close as possible to a
cold water connection. The product should be protected from the effects of
frost (for example in caravans, summer houses, etc.). Depending on the model,
the device may be installed above (OT-model) or under (UT-model) the worktop.
Frost
The device should be installed in a vertical position in a room protected from
frost and in the proximity of the water connections. In case the room cannot
be protected against frost, the device should not be installed in this room.
Should the device be installed in such a room, the device should be emptied
before the frost danger will occur.
Connection to the water supply
Blue = cold water entry side (for filling)
Red = hot water exit side (hot water demand)
The device is designed for use in zero-pressure systems. This system allows
water to be drawn from a single discharge point. Never use a shut-off valve in
the appliance’s outlet.
The connection pipes must be installed as shown in the drawing.
A low-pressure tap fitting must be used for zero-pressure installation.
The water supply pipe and water discharge pipe are marked (red for hot water,
blue for cold water). (See the assembly instructions for the tap fitting.)
If the mains water supply pressure exceeds 5 bars, a pressure restrictor must be fitted in the feed pipe. At the spout of the tap only a strainer (normally supplied with a low-pressure tap) can be installed, whereas a normal aerator or restrictor is prohibited.
Incorrect usage of this equipment (e.g. garden hose), or usage of a tap that is not meant for low pressure installations may cause pressure build-up in the device that might lead to damage and thereby void the warranty!
Connection to the electricity supply
The device must be filled with water (see above). Only then may the
appliance be connected to the electricity supply (insert the plug in the wall
socket).
Connection of the device to the power supply network must take place in
accordance with electric installation standards and as specified by local laws
and regulations.
The device must be directly connected to the power supply network (230V) via an electrical cable and plug.
Avoid danger from damaged power supply cables. In the event of damage, the
device must be replaced by the manufacturer or its customer service
department, or by an equivalently-qualified person.
Ensure that the addition of this boiler will not overload the fuse protection
in your mains.
Internal modifications to the product may cause problems if this work is not carried out by authorized and qualified technical staff. The warranty only applies if the product has not been modified in any way, i.e. subject to it being in unchanged condition.
In order to avoid creating an unsafe situation by inappropriate resetting of the maximum temperature safety device, this unit may not be powered via an external switching device (a time switch for example) or connected to a circuit, which is regularly switched on and off by the power supply company.
Drawing A. Installation as oversink model
The device must be installed as shown in the installation drawing (A) for
undersink model on the first page of this manual.
- Left outlet of the device is the water outlet (hot/ red), right outlet is the water inlet (cold/ blue).
- Prepare the water connections to the tap. Make sure main water supply is switched off.
- Prepare the electrical connections for the device. Make sure main power is switched off.
- To prepare the connection to the water supply Teflon tape must be used for sealing the pipes.
- Mount the tap to the main water supply.
- Level the tap horizontally.
- Mount the device to the tap.
- Open the main water supply and check for leakage and release air from the system by opening the hot water tap.
- When air has left the system, plug in the device to the electric system.
- Switch on the main power supply.
- Heater should now function!
Drawing B. Installation as undersink model
The device must be installed as shown in the installation drawing (B) for
undersink model on the first page of this manual.
- Left outlet of the device is the water inlet (cold/ blue), right outlet is the water outlet (hot/ red).
- Prepare the water connections to the tap. Make sure main water supply is switched off.
- Install the device by using the installation bracket which is supplied with the device.
- Connect the water supply to the device and to the main water supply.
- Prepare the electrical connections for the device. Make sure main power is switched off.
- Open the main water supply and check for leakage and release air from the system by opening the hot water tap.
- When air has left the system, plug in the device to the electric system.
- Switch on the main power supply.
- Heater should now function!
Technical specifications
| Model Thermoflow | Elex 3.5 |
|---|---|
| Nom. power rating | 230V, 50Hz. |
| Electric supply | 3,5kW |
| Nominal current | 16A |
| Cable size | 3x 1,5mm² |
| Flow rate (Δt=25K) L/m | 2,0L/min. |
| Heating system | Bare elements |
| Min. water resistance at 15°C | ≥ 1300Ωcm |
| Switch on flow rate | 1,8L/min. |
| Max. inlet temperature | 28°C |
| Non-usage consumption | <0,1Wh/h |
| Protection class | I |
| Type of protection | IP24 |
| Dimensions heater (H x W x D) | 240 x 145 x 85mm |
| Unit weight | 1kg |
| Water connections | G⅜” |
| Distance water connections | 35mm |
| Max. pressure water mains | 0MPa |
| Switch on flow pressure | 0,05MPa |
| Daily electricity consumption (Qelec) | 1,263 kWh |
| Load profile | XXS |
| Sound power level (LWA) | 16 dB |
| Energy efficiency (ηwh3) | 40,0 % |
3. User manual
The device must be filled with water before connection to the electrical supply!
When powering up for the first time, you must verify that the temperature indicator (light) extinguishes when the required temperature is reached (the device has reached the set temperature). The device only switches on again if the temperature falls below this setting. (See troubleshooting)
The indicator light is “ON” steadily when the device is in operation.
Important! Purging Air Out
Before switching “ON” the power at the main circuit breaker panel, make sure
that the hot water circuit is free of air pockets or else premature failure of
the element will occur.
Through several simple steps, you can install the appliance and enjoy the endless hot water supply.
This unit is equipped with a 2-steps power heating element. Therefore the outlet hot water temperature may vary in connection with inlet water temperature and flow rate. To get the desired temperature, adjust the hot water flow rate or add cold water at your mixer. See the below figures and follow the instructions.
Make sure the pressure of your water supply system supersedes the 0,5bar (0,05MPa).
Temperature and flow rate
| Flow rate (Δt)
---|---
Rating power| 2.0L/min| 2.5L/min| 3.0L/min
3.5kW| +25.0°C| +20.0°C| +16.7°C
Note: Parameters in the above diagram are drawn under the following condition:
Voltage Supply: 230V /50Hz
4. Maintenance
Maintenance
This device does not require any maintenance by the user. Professional
maintenance may only be carried out by duly authorised technical staff.
If faulty, never try to repair the hot water device yourself. Please contact the nearest service specialist or the party that supplied the appliance originally.
Descaling
A service inspection should be performed by authorized and qualified technical
staff every year. De-scaling of the device during this inspection is highly
recommended, especially when you live in an area with hard water exceeding
12°dH (German standard of hardness).
Care
The enclosure can simply be cleaned with a damp cloth. Do not use aggressive
cleaners or cleaners with a scouring effect!
Prolonged shutdown
Do not use heated water as drinking water.
After prolonged shutdown of the device for example due holiday, the device
should be fully heated up to the maximum temperature (tap at minimum flow)
before re-using. It is recommended to flush the pipes for one minute.
Check the filter which is incorporated in the cold water inlet of the device (blue) regularly and keep it free from debris and dirt. This can be obtained by separating the device from the tap. Make sure you have switched off the main power supply and the main water supply.
5. Trouble shooting
Symptom: No heat, indicator light off
Cause| Remedy
Electric supply is off| Turn on the main circuit breaker.
No or low water flow| Ensure that the minimum water pressure (0,05Mpa /
0,5bar) to switch on the device is met. Also check that the inlet filter
screen is clear from any debris. This is located in the inlet.
Water connections are reversed| Cold water inlet = blue;
Hot water outlet = red.
Symptom: No heat or low temperature, with indicator light on
Cause| Remedy
Water flow too high| Reduce the water flow.
Incorrect power supply| Make sure that the device is connected to the voltage
supply specified on the rating label on the front cover of the device and no
other.
6. Warranty conditions
Warranty
The rights under this manufacturer’s warranty shall apply in addition to
the buyer’s statutory rights. This warranty shall in no way restrict the
buyer’s statutory rights in particularly towards the seller.
Entitlement
The claiming of rights under this warranty shall be subject to the submission
of the respective proof of purchase.
Content
NEG-Novex Großhandelsgesellschaft für Elektro- und Haustechnik GmbH, Chenover
Str. 5, 67117 Limburgerhof, Germany shall guarantee as the manufacturer that
this product is free of material and manufacturing errors. Material and
manufacturing errors arising during the warranty period shall justify the
rights under the warranty. This warranty shall not cover errors due to
improper installation or incorrect taking into use, incorrect operating
conditions or defective maintenance or repair work.
Normal wear and tear as for lime scaling shall also be excluded under this warranty. The warranty will not be valid if the problem is caused by extreme values of drinking water (pH value not between 7 and 9.5 and/or Cl above 150 mg/l and/ or Fe above 0.2mg/l).
Duration
The warranty shall be valid for 24 months. The warranty period shall commence
on the day on which the product is purchased. Warranty services provided shall
neither prolong the warranty period nor initiate a new warranty period.
Claims
The defective product should be sent together with the proof of purchase to
the place of purchase.
NEG-Novex shall not be liable for transport damage. The product shall be repaired or replaced at the discretion of NEG-Novex. The functioning product shall then be sent to the buyer. NEG-Novex shall acquire ownership of replaced parts or products. NEG-Novex shall not be obliged to provide other services such as repair on location, dismantling of defective
Invalidity of warranty
Attempted repairs carried out by a customer or third party that are not
authorized by NEG-Novex shall invalidate the warranty. The same shall apply if
parts are installed in the product or connected to the product that are not
original parts from NEG-Novex.
Restriction
This warranty shall be restricted to rectification and subsequent delivery.
This warranty shall not include compensation, withdrawal from the agreement,
reduction in price or any reimbursement for consequential loss due to defects.
his warranty does not apply to devices purchased outside Germany. The statutory provisions and delivery conditions of the national company or importers must be observed.
Undersink/Oversink
2022 01 v.1
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