TESY 295.2000 Electric Water Heater Instruction Manual

295.2000
Electric Water Heater
Instruction Manual

Dear Clients,
The TESY team would like to congratulate you on your new purchase. We hope that your new appliance shall bring more comfort to your home.
This technical description and instructions manual was prepared in order to acquaint you with the product and the conditions of proper installation and use. These instructions were also intended for use by qualified technicians, who shall perform the initial installation, or disassembly and repairs in the event of a breakdown.
The observance of the instructions contained herein is in the interest of the buyer and represents one of the warranty conditions, outlined in the warranty card.
Please consider that following the current instructions will primarily be of interest to the consumer, but along with this, it is also one of the warranty conditions, pointed out in the warranty card, so that the consumer can benefit from the free warranty services. The producer is not responsible for damages in the appliance that have appeared as a result of the operation and/or installation not corresponding to the instructions here.
The electric water heater complies with the requirements of EN 60335-1, and EN 60335-2-21.

INTENDED USE

The appliance is intended to supply hot water to household sites equipped with a piping system working at a pressure below 6 bar (0,6 Mpa).
It is designed to operate only in closed and heated premises where the temperature is not lower than 4°C and it is not designed to operate in a continuous protracted regime.
The appliance is designed to operate in regions where the water hardness is not more than 10°dH. In case it is installed in a region where the water is harder it is possible that limestone precipitation accumulates very fast. This can cause a specific noise during heating, as well as fast damaging of the electrical part. For regions with harder water yearly cleaning of the limestone precipitation in the appliance is recommended, as well as usage of not more than 2 kW of heating power.

TECHNICAL PARAMETERS

1. Nominal volume V, liters – see the appliance’s rating plate

2. Nominal voltage – see the appliance’s rating plate

3. Nominal power consumption – see the appliance’s rating plate

4. Nominal pressure – see the appliance’s rating plate
   **** This is not the water mains pressure. This is the pressure that is announced for the appliance and refers to the requirements of the safety standards.

5. Water heater type – closed type accumulating water heater, with thermal insulation

6. Inner coating – for models: GC-glass-ceramics; SS-stainless steel; EV – email

7. Water temperature after turning off the thermostat: from 60°С to 75°С.

**** For models with a regulated thermostat, the specified temperature range refers to the cases when the thermostat is set at maximum water heating temperature (see below).

IMPORTANT RULES

• The water heater must only be mounted on premises with normal fire resistance.

• Do not switch on the water heater unless you established it was filled with water.

• Qualified P&P specialists and Electricians must only perform the connecting of the water heater to the water and electric mains. A qualified technician is a person who has the competence according to the regulations of the country in question.

• Upon connecting the water heater to the electric mains care must be taken to connect the safety lead.

• If the probability exists for the premise’s temperature to fall below 0°C, the water heater must be drained (observe the procedure outlined in section V, subsection 2 ‘’Water heater’s piping connection”).

• During operation – the regime of heating the water – water drops through the drainage opening of the protection valve are usual.

• The protection valve should be left open to the atmosphere. Measures should be taken to lead and collect the leakages in order to prevent damages, ensuring that this is in conformation with the requirements described in p. 2 in paragraph V.

• The valve and the elements linked to it must be protected from freezing.

• During the heating, the appliance could produce a hissing noise (the boiling water). This is common and does not indicate any damage. The noise gets higher with time and the reason for this is the accumulation of limestone. To remove the noise the appliance must be cleaned from limestone. This type of cleaning is not covered by the
  warranty.

• In order to secure the water heater’s safe operation, the safety return valve must undergo regular cleaning and inspections for normal functioning /the valve must not be obstructed/, and for the regions with highly calcareous water, it must be cleaned from the accumulated lime scale. This service is not provided under warranty maintenance.
  **** All alterations and modifications to the water heater’s construction and electrical circuitry are forbidden. If such alterations or modifications are established during the inspection, the appliance’s warranty shall be null and void. Alterations and modifications shall mean each instance of removal of elements incorporated by the manufacturer, building in of additional components into the water heater, replacement of elements by similar elements unapproved by the manufacturer.

• These instructions shall also apply to water heaters equipped with a heat exchanger.

• If the power supply cord (of models that have one) is damaged, it must be replaced by a service representative or a person with similar qualifications, to avoid any risk.

• This appliance can be used by children aged 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 the 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.

DESCRIPTION AND PRINCIPLE OF WORK

The appliance consists of a body, flange at the bottom side /for water heaters intended for vertical mounting/ or at the sides /for water heaters intended for horizontal mounting/, protective plastic panel safety-return valve.

1. The body consists of a steel reservoir (water tank) and housing (outer shell) with thermal insulation placed in-between made of ecologically clean high-density polyurethane foam, and two pipes with thread G ½ ‘’ for cold water supply (marked by a blue ring) and hot water outlet pipe (marked by a red ring).
   The inner tank may be of two types depending on the model:
   • Made of steel protected from corrosion by a special glass-ceramics coating
   • Made of stainless steel
   The vertical water heaters may be outfitted with a built-in heat exchange unit (boiler tube). The boiler tube’s entrance and exit are located at the sides and represent pipes with thread G ¾ ‘’.

2. The flange is outfitted with: an electric heater and thermostat. The water heaters with glass-ceramics coating are outfitted with a magnesium protector.
   The electric heater is used for heating the water in the tank and is managed by the thermostat, which automatically maintains the set temperature.
   The thermostat has a built-in overheating safety device, which switches power to the heater when the water temperature reaches excessive values.

3. The safety-return valve prevents the appliance’s complete emptying in the event the cold water supply is interrupted. The valve protects the appliance from pressure increases higher than the allowed value during heating (! pressure increases upon an increase of temperature), via the release of excess pressure during the drainage opening.

**** The safety-return valve cannot protect the appliance in the event of water mains pressure in excess of the acceptable pressure stated for the appliance.

MOUNTING AND SWITCHING ON

** Qualified technicians must perform all technical and electrical assembly works. A qualified technician is a person who has the competence according to the regulations of the country in question.
1. Mounting
We recommend the mounting of the device in close proximity to locations where hot water is used, in order to reduce heat losses during transportation. In the event the device is mounted in a bathroom, the selected location must exclude the possibility of water spray contact from the showerhead or portable showerhead attachment.
The appliance is affixed to a wall via the mounting brackets attached to the unit’s body (if the brackets are not attached to the unit’s body, they must be affixed in place via the provided bolts). Two hooks are used for suspending the appliance (min. Ø 10 mm) set firmly in the wall (not included in the mounting set). The mounting bracket’s construction designed for water heaters intended for vertical mounting is universal and allows a distance between the hooks of 220 to 310 mm (fig. 1a). For water heaters intended for horizontal mounting, the distances between the hooks vary for the different models and are specified in table 1 to Fig. 1c. For water heaters intended for floor installation – table 1 to Fig. 1b.
** In order to prevent injury to users and third persons in the event of faults in the system for providing hot water, the appliance must be mounted in premises outfitted with floor hydro insulation and plumbing drainage. Don’t place objects, which are not waterproof under the appliance under any circumstances. In the event of mounting the appliance on premises not outfitted with floor hydro insulation, a protective tub with plumbing drainage must be placed under the appliance.
Notice: the set does not include a protective tub and the user must select the same.

2. Water heater connection to the pipe network.
Fig. 3: a) – for vertical; b) – for horizontal installation; c) – for floor installation
Where: 1 – Inlet pipe; 2 – Safety valve; 3 – reducing valve (for water main pressure > 0,6 MPa); 4 – Stop valve; 5 – Funnel connected to the sewer network; 6 – Hose; 7 – Drain water tap.
Upon connecting the water heater to the water mains you must consider the indicative color markings /rings/ affixed to the pipes: blue for cold/incoming/ water, red for hot /outgoing/ water.
The mounting of the safety return valve supplied with the water heater is obligatory. The safety return valve must be mounted on the cold water supply pipe, in observance of the direction arrow stamped on its body, indicating the incoming water’s direction. Additional stopcocks must not be mounted between the safety return valve and the water heater.
Exception: If the local regulations (norms) require the usage of another protection valve or mechanism (in accordance with EN 1487 or EN 1489), then it must be bought additionally. For mechanisms operating in accordance with EN 1487, the announced operational pressure must be no more than 0.7 MPa. For other protection valves, the pressure at which they are calibrated must be 0.1 MPa lower than the one marked on the appliance’s sign. In these cases, the safety valve which the appliance is supplied with should not be used.
The presence of other /old/ safety return valves may lead to a breakdown of your appliance and they must be removed.
Another type of stopping armature is not allowed between the protection return valve (the protective device) and the appliance.
The attaching of the safety return valve to threads longer than 10 mm is not allowed, otherwise, this may damage the valve and poses danger to your appliance.
With boilers for vertical assembly, the safety valve has to be connected to the ingoing pipe with the safety plastic panel of the appliance being taken off.
**** The safety valve and the pipe between the valve and the water heater must be protected from freezing. During hose draining – its free end must be always open to the atmosphere (not to be immersed). Make sure that the hose is also protected from freezing.

Opening the cold-water stopcock of the water supply piping network and opening the hot-water stopcock of the water-mixing faucet carries out the filling of the water heater with water. After the filling is complete, a constant stream of water must begin to flow from the water-mixing faucet. Now you can close the hot water stopcock.
In the event you must empty the water heater, first, you must cut off its power supply. The inflow of water from the water mains must first be terminated and the hot water tap of the mixing faucet must be opened. The water tap 7 (figs 3a and 3b) must be opened to drain the water from the water tank. If there is no such tap built in the pipeline, then the water can be drawn as follow:

• Models equipped with safety valve with lever – You can drain the water from the water heater by lifting the safety return valve’s lever. Water will drain from the safety return valves drainage opening
• Models equipped with safety valve without lever – water can be drawn directly from the inlet pipe of the water tank after when you disconnect it from the water main In the event of removing the flange, the discharge of several liters of water, which remain in the water tank, is normal.

**** Measures must be undertaken to prevent damage from discharging water during draining.
In case the pressure in the water mains is over the value pointed out in above paragraph I, then it is necessary to assemble a pressure reduction valve, otherwise, the water heater would not function properly. The Manufacturer does not assume any liability for problems arising out of the appliance’s improper use.

3. Water heater connection to the electrical network
Make sure the appliance is full of water prior to switching on the electrical main power.
3.1. Models with a power cord with a plug are connected by inserting the plug into a contact. They have switched off the power supply by drawing the plug out of the contact.
The wall plug must be properly connected to a separate electrical circle that is provided with a protector. It must be earthed.
3.2. The appliance has to be connected to a separate electrical circuit of the stationary electrical wiring. The connecting has to be constant- with no plug contacts. The circuit has to be supplied with a safety fuse (16A) and with the inbuilt device to insure disconnection of all pole pieces in the conditions of over-voltage from category III.
The connecting of the conductors of the supply cord of the appliance has to be carried out as follows:

• conductor with brown insulation – to the phase conductor of the electrical wiring (L)
• conductor with blue insulation- to the neutral conductor of the wiring (N)
• conductor with yellow-green insulation – to the safety conductor of the wiring ( )

3.3. Models without power cord
The appliance has to be connected to a separate electrical circuit of the stationary electrical wiring. The circuit has to be supplied with a safety fuse 16A (20A for power > 3700W). Copper single core (rigid – non stranded) conductor shall be used for the connection – cable 3 x 2.5 mm² (cable 3 x 2.5 mm² for power > 3700W).
The electrical circuit supplying the appliance must have an in-built device ensuring the splitting of all terminal poles under conditions of super-voltage of category III.
To install the power supply wire to the boiler, remove the plastic cover.
Connect the power wires in compliance with the marks on the terminals, as follows:

• the phase – to mark A, A1, L, or L1;
• the neutral – to N (B or B1 or N1)
• The safety wire must be obligatory connected to the screw joint marked with  .

After the installation put the plastic cover back in its place!
Explanations to Fig. 3:
TS – thermal switch; TR – thermal regulator; S – switch (for models that have one); R – heater; IL – light indicator; F – flange; KL – luster terminal;

**RUST PROTECTION MAGNESIUM ANODE (FOR WATER HEATERS WITH WATER TANKS

COVERED BY GLASS-CERAMICS COATING)**

The magnesium anode protects the water tank’s inner surface from corrosion.
The anode’s term of use is up to five years. The anode element is an element undergoing wear and tear and is subject to periodic replacement.
In view of the long-term and accident-free use of your water heater, the manufacturer recommends periodic inspections of the magnesium anode’s condition by a qualified technician and replacement whenever required, and this could be performed during the appliance’s technical preventive maintenance.
For replacements, please contact the authorized service stations!

OPERATION

1. Switch on:
Before switching on the appliance for the first time, make sure that the boiler is properly connected to the power supply network and full of water.
The boiler is switched on by a switch integrated into the installation, described in item 3.2 of Section V, or upon connecting the plug to the electrical contact (in the case of an extension cable with the plug).
2. Water heaters with electromechanical control
Fig. 2 where:
1 – Electrical switch button (for models with а switch)
2 – Light indicators
3 – Thermostat control knob (only for models with adjustable thermostat)
2.1. Models with а built-in switch
There is an embossed marking on the button of the electrical switch .

• Push and release the button in order to switch on the electrical switch. If it lightens, this means that it is switched on. The button lights constantly unless the switch is switched off or the appliance power supply from the electrical main is switched off (see item 1 above). The light indicators lighten too (see item 2.2. below).
• In order to switch off the electrical switch, push and release the button again. It must stop to light if it is switched off. The light indicators stop lighting too.

2.2. Light indicators
The indicators light in red color – which means that the appliance is in heating mode
The indicators light in blue color – means that the water is warmed and the thermostat is switched off because the set temperature is reached

The light indicators do not light when:

• The electrical switch of the appliance is switched off
• The appliance power supply from the electrical main is switched off
• Protection according to the temperature is switched off – see item 3 below

2.3. Temperature setup (for models with adjustable thermostat)
This setup allows the gradual setting of the desired temperature, achieved by using a handle on the control panel. Turn the knob to the upward indication, in order to increase the temperature of the hot water.
** Place the thermostat knob in position for maximum temperature (unless it is in this position constantly), for a period of one day each month. This ensures higher hygiene of the used hot water.
IMPORTANT: Models that do not have thermostat control knobs have automatic water temperature preset by the manufacturer.
** ANTI-FREEZE MODE (fig.2). With this setup the device maintains a temperature that does not allow the water to freeze in it. The electrical supply of the appliance should be turned on and so must the appliance. The safety valve and the pipe between the valve and the appliance must be protected from freezing. In case for some reason the electrical supply is cut off, there is a risk of freezing the water in the water tank. For this reason, we recommend draining the water out of the appliance before long absences (longer than a week).

3. Protection according to the temperature (valid for all models).
The appliance is equipped with a special facility (thermal circuit breaker) for protection against overheating of the water, which is switching off the heater from the electricity network when the temperature reaches too high values.
**** When this device operates, it does not self-reset and the appliance will not work. Please call an authorized service for solving the problem.

**MODELS EQUIPPED WITH A HEAT EXCHANGER (SERPENTINE TUBE) – FIG.1D AND

TABLE 2.**

These water heaters allow energy savings during the year’s heating season. This is achieved by the built-in heat exchanger (boiler tube). With its assistance, the water heaters may heat water without consuming electricity, by using local or central water heating.
Maximum temperature of the heat carrier: 80°C.
The water heaters equipped with a heat exchanger offer three possibilities for water heating:

1. Via an electric heating element
2. Via a heat exchanger /boiler tube/
3. Combined heating – via boiler tube and electric heating element Mounting:

In addition to the mounting manner outlined above, especially for the later models, it shall be required to connect the heat exchanger to the heating installation. The connections are to be carried out in observance of the direction indicated by the arrows in Fig. 1d.
We recommend you mount stopcocks at the heat exchanger’s entry and exit points. By stopping the flow of the thermophore via the lower (stopcock) you shall avoid the unnecessary circulation of the thermophore during periods of use only of the electric heating element.
Upon disassembly of your water heater equipped with a heat exchanger, you must close both stopcocks.

The usage of dielectric bushings for connecting the heat exchanger to an installation of copper pipes is obligatory.
For ensuring minimal corrosion, pipes with limited diffusion of gasses must be used in the installation.

PERI ODIC MAINTENANCE

Under normal use of the heater, under the influence of high temperature, lime scale /the so-called limescale layer/ is deposited upon the heating element’s surface. This worsens the heat exchange between the heating element and water. The heating element’s surface temperature increases along /with boiling water/. The thermoregulator begins to switch on and off more frequently. A ‘’deceptive” activation of the thermal protection is possible. Due to these facts, the manufacturer recommends preventive maintenance of your water heater every two years by an authorized service center or service base. This protective maintenance must include cleaning and inspection of the anode protector (for water heaters with glass-ceramic coating), which shall be replaced with a new one if the need arises.
In order to clean the appliances use a damp cloth. Do not clean with abrasive or solvent content detergents. Do not pour water over the appliance.
THE MANUFACTURER DOES NOT BEAR THE RESPONSIBILITY FOR ALL CONSEQUENCES CAUSED BY NOT OBEYING THE INSTRUCTIONS, GIVEN HEREBY.

Instructions for protecting the environment
Old electric appliances contain precious materials and thus should not be thrown together with the household litter. We kindly ask you make your active contribution for protecting the resources and the environment by handing over the appliance in the authorized buy-back stations (if such exist).

1. a

1

Liters| D, mm| A, mm
50| 353| 411
60| 440| 277
80| 353| 766
80| 440| 407
100| 440| 552
120| 440| 702
1 b| 1 c
---|---
|

2

1d 2 a

| | | |
---|---|---|---|---
| anti-freeze mode| Comfort appx.40°C| Comfort appx.55°C| Comfort appx.70

2 b

| | | |
---|---|---|---|---
anti-freeze mode| 25±5 °C| 40±5 °C| 55±5 °C| 70±3 °C

3

|
|

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TESY Ltd
Head office, 1166 Sofia, Sofia Park,
Building 16V, Office 2.1. 2nd Floor,
PHONE: +359 2 902 6666,
FAX: +359 2 902 6660,
office@tesy.com
102705_001

Documents / Resources

| TESY 295.2000 Electric Water Heater [pdf] Instruction Manual
295.2000, Electric Water Heater, 295.2000 Electric Water Heater, Water Heater, Heater
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References

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