Bosch Condens GC8700iW 30 P + W 120-5 O1 A + CR 400

Product detailed description

Consistently efficient

Saving energy can be this simple: the boiler automatically adjusts its output in the range of 10 to 100% to match your household's current heat demand. This means it works efficiently even when you don't need its full output.

 

High quality

The high quality of the Bosch brand is reflected in the boiler's flawless workmanship and technical equipment, which includes both long-proven components and new, modern features.

 

Easy operation

Operating the boiler is very intuitive. All parameters can be set using the colour touchscreen display. Combined with the intelligent CT200 control, you can operate the Condens 8700i W boiler via the EasyControl app on your smartphone or tablet.

 

Fast and easy maintenance

The Condens 8700i W guarantees savings on all installation work. Access to the technical components is quick and easy thanks to the removable side casing of the boiler. The front cover of the boiler can be removed by loosening a single screw.

 

Advantages of the boiler

▶ high efficiency thanks to the wide 1:10 modulation range

▶ an eye-catching design in white and black versions with control via a colour touchscreen display

▶ easy wireless connection with the intelligent CT200 controller using the Control Key module /the controller and module are not included with the boiler, available as an optional extra/

▶ hot water preparation in an external indirect-heating tank

▶ the flue connection adapter is included with the boiler

 

Dimensions and connections

 

 

 

 

1 - Horizontal flue accessories

2 - Cover                                                   

3 - Distance from the top edge of the boiler to the central axis of the horizontal flue pipe

B - Distance from the top edge of the boiler to the ceiling

K - Diameter of the opening

S - Wall thickness

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  

Technical data

Front design colour: white

Max. rated heat output (50/30°C): 31,1 kW

Min. rated heat output (50/30°C): 3,2 kW

Sound power level according to ErP15: 52,8 dB (A)

Seasonal space heating energy efficiency of

premises according to ErP15: 94 %

Energy efficiency class: A

Equipment

Expansion vessel: 10,0 l

High-efficiency pump EEI ≤ 0,23: integrated

Diverter valve: integrated

Dimensions and weight

Height: 780 mm 

Width: 440 mm

Depth: 365 mm 

Net weight: 47 kg

 

 

BOSCH W 120-5 O1 A

- hot water tank 

- capacity: 115 l

- colour: silver

 

• type: stationary, cylindrical
• with a usable capacity of 115 l
• water connections at the top
• inspection opening for cleaning and maintenance at the top
• integrated filling and drain valve
• suitable for combination with a wall-mounted condensing boiler
• hot water can be drawn from several points at the same time
• simple installation and economical operation
• option to connect a circulation circuit directly from the tank body (bacteriologically clean water)
• insulation made without the use of fluorinated and chlorinated hydrocarbons
• high corrosion resistance
• enamelled surface and built-in protective anodes ensuring compliance with environmental requirements and a long service life
• energy efficiency class A

 

Technical data

Colour: silver

Usable capacity: 115 l

Heating coil output: 34,0 kW

Quantity of 45°C hot water: 834 l/h

Heating water volume: 6,8 l

Heating surface area: 1,0 m2

Max. operating water pressure: 10,0 bar

Energy efficiency class: A

Dimensions and weight

Height: 1135 mm

Width: 600 mm

Depth: 600 mm

Net weight: 72 kg

 

 

BOSCH CR 400 - system controller

 

• system controller controlled according to outdoor temperature
• for gas boilers with up to 4 heating circuits
• without remote control
• 2 DHW charging circuits
• for simple/complex heating systems
• weekly programme for heating with 6 switching points during the day
• two adjustable temperature levels
• compatible with the MM 100 module and MS 100/200, MC 400
• 2 hot water circuits
• solar heating of hot water
• solar heating support
• option to choose from two freely adjustable weekly programmes for the heating circuit
• programme for the circulation pump, holiday programme

Frequently Asked Questions

• How exactly do I choose the output of a BOSCH condensing boiler? The basis is the calculated heat loss of the heated building (most reliably from the project documentation or an energy certificate). If you don't have a project, you can roughly estimate about 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 according to the number of floors, ceiling height, the number and quality of windows, and the building's orientation. A boiler oversized for its output switches on and off more often (so-called cycling), which shortens its service life and reduces efficiency; conversely, an undersized boiler will struggle to adequately heat the house on frosty days.
• Why is a condensing boiler more economical than a conventional one? A condensing boiler additionally makes use of the heat hidden in the water vapour produced when burning gas - in a conventional boiler this leaves unused through the flue, while 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 the usual 85-92% for conventional boilers.
• What type of flue does this boiler need? Most modern condensing boilers are so-called turbo boilers (with a sealed combustion chamber) and require a concentric (coaxial) or separate flue and combustion air supply routed through an outer wall or roof - so a functional chimney is not required. You'll find the exact type and maximum length of the flue (according to a diameter of 60/100 or 80/125 mm) 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 on refrigerators. Condensing boilers commonly achieve class A, or higher in combination with room controls (e.g. A+ when using weather-compensated control and a room thermostat).
• Can I install and connect this boiler myself? No. Connection to the natural gas supply, the electrical network, and the flue is, by law, reserved exclusively for a person with the relevant qualification (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 servicing and the 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 with regular servicing is common especially with the Vaillant, Protherm, and Viessmann brands). You'll find the exact warranty terms in the warranty certificate supplied with the boiler.
• What is included in the delivery of this specific product? The exact package contents (the boiler itself, and where applicable a hot water tank, room controls, and other accessories in the case of a set) are stated in the product name and in its technical parameters above on this page.