Protherm Tiger Condens 20/26 KKZ 21

Product detailed description

Protherm Tiger Condens 20/26 KKZ 21
- wall-mounted condensing boiler with a built-in cylinder
- cylinder volume: 21 l
- boiler output: 2.5 - 20.0 kW 

(version until 2020 under the name Protherm Tiger Condens 18/25 KKZ 21)

With the new Tiger Condens condensing boiler, you get a heating system that won’t let you down. Discover with us the benefits and advantages of top-class condensing technology for hot water comfort and reduced heating costs.

NEW DESIGN OF TIGER CONDENS BOILERS

NEW FEATURES

 

New FlameFit optimal combustion technology - higher efficiency, lower flue gas emissions, lower gas consumption – a technology focused on optimal combustion of different types of gas supplied from various sources with different quality and composition. 

 

New casing design - a refreshed design of the boilers (casing, control panel), while the footprint and connection dimensions have been kept the same as in the previous version of the boilers, to make quick and easy boiler replacement easier.

 

New control panel design - the panel’s appearance matches the look of the new eBUS controllers, touch buttons, backlit display, simple and intuitive control and setting, whether for the customer or the service technician.

 

New Isodyn3 intelligent cylinder heating technology - new intelligent heating of built-in cylinders, guaranteeing exceptional DHW supply comfort. A tested and patented technology. Even greater energy savings than with the previous Isodyn2 heating technology.

 

“Smart shower” function - the combi boiler ensures DHW comfort while showering by continuing to wait for the next DHW draw-off even during an interruption in DHW supply to the shower (e.g. while lathering up), and does not switch to heating mode even if there is a demand for it (it waits 3 minutes).

 

Accessory connectivity - easy connection and quick attachment of external control accessories such as an internet gateway and/or a wireless room controller, without needing to open the boiler casing, even for the end customer.

 

Compatibility with the latest eBUS controllers - the control panel’s appearance matches the look of the new eBUS controllers, with similar controls and easy operation.

 

NEW TIGER CONDENS BOILER TECHNOLOGIES

 

FlameFit technology - guarantees continuous and automatic optimisation of gas combustion, which reduces gas consumption and also keeps flue gas emissions low. And all of this regardless of the quality of the given type of gas. In addition, FlameFit technology supports a reduction in the boiler’s minimum output and also increases its modulation range. 

 

The new FlameFit technology consists mainly of

placing a special ionisation electrode just

above the surface of the burner. When voltage is applied,

an electric current flows through the flame between

the electrode and the burner, the magnitude of which depends on the quality of the flame. 

 

The change in the magnitude of the flowing electric current is used to optimise the air/gas mixture on the control board in order to achieve optimal combustion.

 

Isodyn3 Technology 

- with intelligent heating of the built-in cylinder

- guarantees exceptional hot water supply comfort from the wall-mounted boiler itself

- now also with an improved “Intelligent way of heating cylinders” for even greater energy savings

5 key benefits of IsoDyn3 technology:

1. Exceptional DHW flow rate for a wall-mounted boiler (up to 210L of hot water at 40°C within 10 min)

2. Cylinder reheating time of 5 minutes for the next draw-off of a further 210 L of hot water

3. High temperature stability of the drawn water, regardless of the number of simultaneously open draw-off points

4. Fast delivery of hot water to the draw-off point (especially at low draw-offs), minimal waiting time (saving time and wasted water)

 

5. New: intelligent cylinder heating - a new cylinder heating technology that heats only at times when hot water is expected according to household habits, saving energy and thus reducing the cost of DHW heating

 

EASY AND INTUITIVE CONTROL

 

Control is as simple and intuitive as operating your smartphone. The control panel shows you your consumption, the water temperature, or when a service inspection is needed. The Mipro Sense weather-compensated controller has the same control panel, so you will have all the information and functions easily available.

 

ACCESSORIES - New room and system controllers

 

The new range of eBUS controllers has a similar look to the boilers’ control panel:

 

• MiPro Sense: a system controller for standard use in larger heating systems

 

 

 

• MiSet: with a wired connection or as wireless room controllers for weather-compensated control of single-circuit heating systems (with an outdoor temperature sensor connected as an optional accessory)

 

Note: Accessories are not included in the package, can be ordered additionally.

 

Second boiler with a 42-litre cylinder Protherm Tiger Condens 20/26 KKZ42 can be found here!

PARAMETERS

	Tiger Condens 20/26 KKZ 21
Heating
Energy class for heating	A
Output at flow/return temperature 80/60°C	2.5 - 20.0 kW
Output at flow/return temperature 50°C/30°C	2.8 - 21.9 kW
CH output temperature control range	15 - 80 °C
Max. operating pressure	0.3 MPa (3.0 bar)
CH expansion vessel	12 l
NOx class	6
Hot water preparation
Maximum output for DHW preparation	26.0 kW
Range of DHW output temperature control	45 - 65 °C
DHW flow rate limiter	12 l/min
Permitted operating pressure, cold drinking water	0.03 - 1.0 MPa (0.30 - 10.0 bar)
Required connection pressure, cold drinking water	0.2 MPa (2.0 bar)
Minimum DHW flow	1 l/min
Specific flow D (ΔT = 30 K)	15 l/min
DHW cylinder volume	21.0 l
DHW expansion vessel	2 l
Electrical parameters
Voltage/frequency	230 V/50 Hz
Maximum electrical input	115 W
Standby power consumption	2 W
Electrical protection rating [IP]	IPX4D
Dimensions
Gas connection	G 1/2"
Heating connections	G 3/4"
Cold/hot water connections on the boiler side	G 3/4"
Safety valve connection	15 mm
Condensate drain hose	21.5 mm
Boiler dimensions (width/height/depth)	470/ 893/ 514 mm
Weight (without packaging, without water)	49 kg
Weight, in standby condition	77 kg

 

Frequently Asked Questions

• How exactly do I choose the output of a PROTHERM condensing boiler? The basis is the calculated heat loss of the heated building (most reliably from the project documentation or energy certificate). If you don't have a project, you can roughly estimate around 60-100 W per m² of floor area for a commonly insulated house built after 2000, or 100-150 W/m² for an older, non-insulated house - the exact figure, however, varies depending on the number of floors, room height, the number and quality of windows, and the orientation of the building. A boiler oversized in output switches on and off more frequently (so-called cycling), which shortens its service life and reduces efficiency; conversely, an undersized boiler cannot sufficiently heat the house on frosty days.
• Why is a condensing boiler more economical than a conventional one? A condensing boiler additionally utilises the heat hidden in the water vapour produced during gas combustion - in a conventional boiler this escapes unused through the flue, whereas in a condensing boiler it is cooled below the so-called dew point, the vapour condenses, and the released heat is returned to the heating circuit. Thanks to this, condensing boilers achieve an efficiency of approximately 105-110% relative to the calorific value of the gas, compared to a typical 85-92% for conventional boilers.
• What type of flue gas extraction does this boiler need? Most modern condensing boilers are so-called turbo boilers (with a sealed combustion chamber) and require either a concentric (coaxial) or separate flue gas discharge and combustion air supply routed through the outer wall or roof - so a functioning chimney is not needed. The exact type and maximum length of the flue (depending on the 60/100 or 80/125 mm diameter) can be found in the technical documentation for the specific model, or you can consult our customer service.
• What does the ErP energy class shown for the boiler mean? This is a mandatory efficiency label for heating appliances under the EU ErP (Ecodesign) directive, similar to the energy labels used for refrigerators. Condensing boilers commonly achieve class A, or even higher in combination with room controls (e.g. A+ when using weather-compensated control and a room thermostat).
• What is a cascade connection of boilers? This is the interconnection of several boilers into a single system so that they together cover a higher output than a single boiler can - suitable for larger buildings (apartment blocks, commercial premises). The system switches on additional boilers gradually according to current demand, achieving high efficiency even with fluctuating heat consumption.
• Can I install and connect this boiler myself? No. Connection to the natural gas supply, electrical network and flue gas extraction is by law reserved exclusively for a person with the relevant authorisation (most often an authorised service technician of the given brand or a gas appliance inspection technician). After installation, the boiler must be commissioned by the manufacturer's authorised service, which is usually also a condition for the warranty to be valid.
• What about service and warranty? Most manufacturers require a regular annual service inspection by an authorised service provider in order to keep the warranty valid even after its standard expiry (an extended warranty for regular servicing is common especially with the brands Vaillant, Protherm and Viessmann). The exact warranty terms can be found in the warranty certificate supplied with the boiler.
• What is included in the delivery of this specific product? The exact contents of the package (the boiler itself, possibly a hot water cylinder, room control and other accessories in the case of a set) are stated in the product name and in its technical parameters above on this page.