IMPORTANT: The appliance provides a permanent external electrical supply for servicing and must therefore be fed via a circuit breaker incorporating earth leakage protection.

MAINS WATER EXPANSION VESSEL:

A - Mini expansion vessel, part No. 7 716 102 105

B - Mains water inlet

 

 

 

C - Non-return valve

 

 

 

D - Boiler

 

 

D

 

 

 

 

A

B

C

 

 

 

 

 

 

 

 

 

 

 

 

MAINS SUPPLIES

ELECTRIC SUPPLY:

 

•

Supply: 230V - 50Hz.

 

• Cable: PVC insulated 0.75mm2 (24 x

 

 

0.2mm) temperature rated to 90°C.

 

•

Protection IP45.

 

•

External 5A fuse to BS 1362.

 

•

The appliance must be earthed.

 

•

Please refer to IEE regulations for cross

 

 

bonding requirements.

 

•

It must be possible to isolate the appliance

 

 

from the electric supply with at least a 3mm

 

 

contact separation in both poles supplying

 

 

the appliance.

 

•

Wiring between the appliance and the

INSTALLATION

 

PRE-

 

electrical supply must comply with IEE wiring

 

regulations and any local regulations which may apply for fixed wiring to a stationary appliance.

• Any system connected to the boiler must not have a separate electrical supply.

WATER SUPPLY:

The following are general requirements and if necessary the advice of the local water company should be sought before fitting the appliance.

•The appliance cold water supply should be the first connection off the water main where possible.

Water Mains Pressure:

Minimum dynamic mains water pressure for

optimum performance.

12/18kW

18/25kW

25/32kW

 

 

 

1.5 bar

1.2 bar

0.9 bar

 

 

 

•Maximum mains fed water pressure 10 bar. If necessary, fit a pressure reducing valve.

IMPORTANT: Non-return, back flow prevention devices (including those associated with water meters) fitted to the mains water supply can cause a pressure build up which could damage the boiler and other household appliances.

•Where the water main supply has a non- return, back flow prevention valve fitted, a mini expansion vessel (A) must be connected to the mains water inlet pipe (B) between the non-return valve (C) and the boiler (D) as shown opposite.

Use in hard water areas:

Normally there is no need for water treatment to prevent scale formation as the maximum temperature of the heat exchanger is limited by the control circuit.

In areas where the temporary water hardness exceeds 200ppm, consideration may need to be given to the fitting of a scale prevention device. In such circumstances, the advice of the local water authority should be sought.

8

INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR HEATSLAVE EXTERNAL 12/18-18/25-25/32 8 716 113 389b (09/07)

MAINS SUPPLIES

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Bosch Appliances 18/25, 25/32kW, 12/18 Mains Supplies, Mains Water Expansion Vessel, Electric Supply, Water Supply
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25/32kW, 12/18, 18/25 specifications

Bosch Appliances has carved out a reputation for engineering high-performance heating solutions, particularly with their range of heating systems including the 18/25, 12/18, and 25/32 kW models. These systems are designed to meet the diverse needs of residential and commercial spaces while maintaining energy efficiency and sustainability.

The Bosch 18/25 kW model excels in providing an optimal heating solution for medium to large residential properties. It is equipped with a highly efficient condensing boiler that extracts additional heat from flue gases, achieving significant energy savings. The built-in, user-friendly interface allows for easy programming and monitoring, which maximizes user convenience.

The 12/18 kW model provides a versatile opportunity for smaller homes or apartments. Its compact design ensures that it fits seamlessly into tighter spaces without sacrificing performance. The unit operates quietly, making it an excellent choice for residential areas where noise can be a concern. Additionally, it features the latest modulation technology, optimizing energy usage and maintaining consistent temperatures.

Finally, the 25/32 kW model is ideal for larger installations, offering robust performance even in high-demand scenarios. This model benefits from advanced heating management systems that enable intelligent control of heating zones, ensuring efficiency and comfort throughout the property. With its enhanced energy rating, the 25/32 kW model significantly reduces the carbon footprint, aligning with modern sustainability goals.

Across the board, Bosch Appliances integrates advanced technologies such as intelligent diagnostics, smart home compatibility, and eco-friendly materials. All models are constructed with durability in mind, featuring corrosion-resistant heat exchangers and high-quality components designed for longevity.

The customer-focused features, including comprehensive warranty packages and responsive customer service, further exemplify Bosch's commitment to quality. Overall, Bosch Appliances 18/25, 12/18, and 25/32 kW heating systems stand out for their innovative technology, efficient performance, and reliability, making them an excellent choice for those looking to upgrade their heating solutions.
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