Bosch Appliances 18/25, 25/32kW Pipework Connections, Water Connections, OIL Supply Connections

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INSTALLATION

CAUTION: ISOLATE THE OIL & WATER MAINS SUPPLY BEFORE STARTING ANY WORK AND OBSERVE ALL RELEVANT SAFETY PRECAUTIONS.

PIPEWORK CONNECTIONS

A- CH flow 22mmØ copper (28mmØ on 25/32 models)

B - DHW flow 22mmØ

C - Water main inlet 15mmØ

D- CH return 22mmØ copper (28mmØ on 25/32 models)

E - 10mmØ oil supply pipe connection

F- Oil isolating valve (10mmØ) G - Flexible oil hose

N - Optional open vent/air vent

O - Drain/optional feed and expansion

P - Fixing point for optional return oil pipe

WATER CONNECTIONS:

All service pipes into the property must pass through the services duct.

Insulate all the system/supply pipes where the pipes pass through the duct with at least 22mm insulation around the pipes.

Remove the transit bungs from the pipework connections on the boiler.

NOTE: that surplus water may be present due to factory testing.

Ensure all pipework is clean.

Align water pipework through the 100mm Ø duct and connect, ensuring that the expansion tank and control box fit correctly before permanently connecting the pipework. Check that all unused sockets have been capped.

OIL SUPPLY CONNECTIONS:

NOTE: Oil filters and de-aeration devices are not to be fitted within the casing and the fire valve body must be at least 1 metre from the external casing.

Route the oil supply pipe through the appropriate casing hole as required and connect to the isolating valve (F) and ensure the valve is closed.

Connect the flexible oil hose (G) to the isolating valve (F).

Pass the fire valve sensor through the most appropriate casing hole and locate the capillary in the cut out at the bottom of the hole.

Clip the sensor into the clip provided at the rear of the control box.

Rotate the cover plate and seal so it does not cover the capillary, then secure with the screws provided.

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PIPEWORK CONNECTIONS

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

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Contents Greenstar Heatslave External 12/18, 18/25, 25/32kW Installation & Servicing Instructions Installation & Servicing InstructionsContents Safety Precautions Installation RegulationsSafety Precautions Installation Regulations OIL SMELLS, Leaks or Fumes from the ApplianceGeneral Information General InformationStandard Package Technical Data Technical DataDescription BSPLayout & Components Layout & ComponentsCleaning Primary Systems Cleaning Primary SystemsMains Supplies Mains SuppliesMains Water Expansion Vessel Electric SupplyOIL Supply OIL SupplyG J HeadWater Systems & Pipework Water Systems & PipeworkFilling Primary Sealed Systems SHOWERS/BIDETSDomestic HOT Water Condensate Pressure Relief Pipework Condensate Pressure Relief PipeworkCondensate Pipework Pressure Relief PipeworkBoiler Location Clearances Boiler LocationClearances FrontCabinet Mounted LOW Level Flue Terminal Positions Cabinet Mounted LOW Level Flue Terminal PositionsTerminal Position High Level Flue Terminal PositionsHigh Level Flue Terminal PositionsBalanced External Oilfit Flue Options Balanced External OilfitFlue Options AC DCabinet Mounted Balanced Horizontal Flue OptionsBalanced Flue Options Lifting and Carrying Precautions Unpacking the BoilerUnpacking the Boiler Safety Pipework & Flue PositionsPipework & Flue Positions Boiler Installation Boiler InstallationFlue Installation Flue InstallationInstallation Notes Combustion Chamber Combustion ChamberHor Plan sectional view Hook the retainer J over the end two bafflesPipework Connections Pipework ConnectionsWater Connections OIL Supply ConnectionsCondensate Connection Pressure Relief ConnectionOIL Burner & Pump OIL Burner & PumpOIL Burner OIL PumpRefitting Components Refitting ComponentsPlug burner lead E into control box F Mains Programmer External ElectricsBoard ElectricsBr Brown Blue Green/YellowRed WhitePRE-COMMISSIONING Checks Appliance PRE-COMMISSIONINGChecks Appliance Filling the System Filling the SystemStarting the Appliance Starting the ApplianceSafely dispose of the container/discharge Pressure adjustment Vacuum gauge port 25/32 Boiler lockout indicator onBleed & pressure gauge port Holder with oilBurner should be OFF and the circulating pump on Central heating Open all radiator valves Set the room thermostat to minimumWater Treatment Water TreatmentPump and all radiators Finishing Commissioning Finishing CommissioningAppliance Inspection and Service Inspection and ServiceRoutine servicing Loosen clip D to detach air ductClean the Burner 3.0mm Clean both sides of the fan impellerThoroughly clean any deposits Any debris and clean if necessaryFront 50 80EH 11.5 18.655 80EH 12.0 22.2Short Parts List 12/18 Short Parts List 12/18Auto reset High Limit thermostat Part Number 8 716 107 640 Burner SterlingShort Parts List 18/25 Short Parts List 18/25Manifold access cover seal Short Parts List 25/32 Short Parts List 25/32Fault Finding Fault FindingProblem Cause Remedy Faulty Boiler OperationNoisy operation Pump noise from air in pump or OIL SmellsNeutral N and the pin, wire or Base of the control box before replacing any componentsMeasure all 230V tests between 535 SE/LD RDB Fault Finding Control BOX Logic forSchematic ElectricalOIL Boiler Combustion Record Service 1 Date General checks Excellence Comes AS Standard

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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