Bosch Appliances 25/32kW, 18/25, 12/18 instruction manual Filling the System

Page 31

1

B

A

C

2

3 D

FILLING THE SYSTEM

1Pull lever (C) up and push to the left to move the diverter valve to the mid-position between ports A and B.

Push and hold lever (C) down to lock.

2Loosen the automatic air vent cover.

4Sealed systems only; check and if required, adjust the expansion vessel pressure using the Schraeder type valve (D).

The charge pressure of the built-in 12 Litre expansion vessel is 0.5 bar as dispatched, which is equivalent to a static head of 5 metres (16.7 ft).

Total system

Initial system

Initial charge

volume (litres)

pressure (bar)

pressure (bar)

180

0.5

0.5

107

1.0

0.5

138

1.0

1.0

If an extra expansion vessel is fitted to the central heating return, adjust this to the same pressure as the appliance internal expansion vessel, refer to separate instructions supplied with the extra expansion vessel.

4

1 - 2 bar

4 Open all system and radiator valves (E).

Turn on the water main stop cock.

Open vented systems only; turn on the

water to the system feed and expansion

cistern and allow the system to fill.

Sealed systems only; fill the system to

between 1 and 2 bar pressure via a WRAS

E E

F

5

6

B

C A

approved filling link. Monitor the pressure

COMMISSIONING

gauge during venting and repressurise if

required.

Check air is being discharged from the

automatic air vent.

Vent all radiators, retighten when completed,

 

check the system and correct any leaks.

 

Bleed air from both of the secondary heat

 

exchanger air vents (F).

 

Bleed air from the pipework using the

 

pump bleed screw.

 

5Sealed systems only; connect a suitable hose to the Heatslave tank drain. Open the drain valve to reduce the system to the correct pressure, then close the drain valve. Ensure safe disposal of the discharge. Rotate the adjustable pointer on the pressure gauge to record the set system pressure.

6Check system and rectify any leaks.

Push lever (C) to the left and pull upwards to allow the lever to return to position A.

Leave the lever (C) unlocked at position A.

30

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

FILLING THE SYSTEM

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Page 30 Page 32
Contents Greenstar Heatslave External 12/18, 18/25, 25/32kW Installation & Servicing Instructions Installation & Servicing InstructionsContents OIL SMELLS, Leaks or Fumes from the Appliance Safety PrecautionsInstallation Regulations Safety Precautions Installation RegulationsGeneral Information General InformationStandard Package BSP Technical DataTechnical Data DescriptionLayout & Components Layout & ComponentsCleaning Primary Systems Cleaning Primary SystemsElectric Supply Mains SuppliesMains Supplies Mains Water Expansion VesselHead OIL SupplyOIL Supply G JWater Systems & Pipework Water Systems & PipeworkSHOWERS/BIDETS Filling Primary Sealed SystemsDomestic HOT Water Pressure Relief Pipework Condensate Pressure Relief PipeworkCondensate Pressure Relief Pipework Condensate PipeworkFront Boiler Location ClearancesBoiler Location ClearancesCabinet Mounted LOW Level Flue Terminal Positions Cabinet Mounted LOW Level Flue Terminal PositionsTerminal Position Positions High Level Flue TerminalPositions High Level Flue TerminalAC D Balanced External Oilfit Flue OptionsBalanced External Oilfit Flue OptionsHorizontal Flue Options Cabinet Mounted BalancedBalanced Flue Options Unpacking the Boiler Lifting and Carrying PrecautionsUnpacking the Boiler Pipework & Flue Positions SafetyPipework & Flue Positions Boiler Installation Boiler InstallationFlue Installation Flue InstallationInstallation Notes Hook the retainer J over the end two baffles Combustion ChamberCombustion Chamber Hor Plan sectional viewOIL Supply Connections Pipework ConnectionsPipework Connections Water ConnectionsPressure Relief Connection Condensate ConnectionOIL Pump OIL Burner & PumpOIL Burner & Pump OIL BurnerRefitting Components Refitting ComponentsPlug burner lead E into control box F Electrics MainsProgrammer External Electrics BoardWhite Br BrownBlue Green/Yellow RedPRE-COMMISSIONING PRE-COMMISSIONING Checks ApplianceChecks Appliance Filling the System Filling the SystemStarting the Appliance Starting the ApplianceSafely dispose of the container/discharge Holder with oil Pressure adjustment Vacuum gauge port 25/32Boiler lockout indicator on Bleed & pressure gauge portBurner should be OFF and the circulating pump on Set the room thermostat to minimum Central heating Open all radiator valvesWater Treatment Water TreatmentPump and all radiators Finishing Commissioning Finishing CommissioningAppliance Loosen clip D to detach air duct Inspection and ServiceInspection and Service Routine servicingAny debris and clean if necessary Clean the Burner3.0mm Clean both sides of the fan impeller Thoroughly clean any depositsFront 12.0 22.2 50 80EH11.5 18.6 55 80EHBurner Sterling Short Parts List 12/18Short Parts List 12/18 Auto reset High Limit thermostat Part Number 8 716 107 640Short Parts List 18/25 Short Parts List 18/25Manifold access cover seal Short Parts List 25/32 Short Parts List 25/32Fault Finding Fault FindingOIL Smells Problem Cause RemedyFaulty Boiler Operation Noisy operation Pump noise from air in pump orBase of the control box before replacing any components Neutral N and the pin, wire orMeasure all 230V tests between Control BOX Logic for 535 SE/LD RDB Fault FindingElectrical SchematicOIL Boiler Combustion Record Service 1 Date Excellence Comes AS Standard General checks

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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