Bosch Appliances 25/32kW, 18/25, 12/18 Mains, Programmer External Electrics, Board

Page 28

INSTALLATION

1B

C

B

230V

 

MAINS

 

SUPPLY

A

 

D

2/3

G

4

F

 

 

 

E

 

G

 

 

P

Accelerator

resistorROOMSTATM (if fitted)

6

PROGRAMMER (EXTERNAL)

ELECTRICS

DANGER - 230V:

ISOLATE THE MAINS ELECTRICITY SUPPLY BEFORE STARTING ANY WORK AND OBSERVE ALL RELEVANT SAFETY PRECAUTIONS.

IMPORTANT: THIS APPLIANCE PROVIDES A PERMENANT EXTERNAL ELECTRICAL SUPPLY FOR SERVICING AND MUST THEREFORE BE FED VIA A CIRCUIT BREAKER INCORPORATING EARTH LEAKAGE PROTECTION.

IMPORTANT: OBSERVE ELECTRONIC STATIC DISCHARGE PRECAUTIONS. DO NOT TOUCH THE PCB CIRCUITS.

WARNING: EXTERNAL EQUIPMENT OPERATED AT 230 VOLTS SHOULD NOT BE SERVICED OR REPAIRED UNDER ADVERSE WEATHER CONDITIONS.

Access to 230V connections:

1 Release screws (B) and remove cover panel (C) from control box (A).

2Release screws (D) from cable clamp (E). Pull inner clamp part (F) outwards.

Feed sufficient power cable (G) through the cable clamp (E) and secure grip with screw (D). Separate wires from cable end and strip to 6mm.

230V connections (terminal block X1):

3 Connect LIVE wire (Brown) to terminal L.

Connect NEUTRAL wire (Blue) to

terminal N.

Connect EARTH wire (Green/Yellow) to

Neutral (if required)

Switched Live

Live

FROST

STAT(1)

7k

Ns Fs FR LR Ls FR

5

CH channel

 

 

 

clock

 

 

 

 

 

HW channel

 

 

 

FROST

 

 

 

 

STAT(2)

 

 

HW Demand

CH Demand

7

M

L Supply

X2

SupplyN

N

 

 

 

 

 

 

 

 

L

 

 

 

 

DHW

 

 

 

 

CH

 

 

 

the connector

 

 

 

 

 

.

 

 

 

 

 

 

 

 

 

 

Route the power cable down the side panel and through the service duct to the internal property connection point avoiding any potentially hot surfaces.

Any external device connected to the boiler must take its power supply from the boiler supply only and must NOT have a separate supply.

External 230V programmer (terminal block X4):

4Remove 4 pin plug (M) from X4.

Remove test links (P) from plug block (M). Connect wires to plug block (M) as shown. Fit plug into terminal block X4.

Connect earth to terminal block X1connector .

230V room thermostat (terminal block X2):

6Remove link (K).

Connect LIVE supply to terminal LS.

Connect SWITCHED LIVE supply to terminal LR.

NOTE: This is sometimes refered to as ‘call for heat’ or ‘heating load’.

27

CONTROLFuse

BOARD

X4

Connect NEUTRAL to terminal Ns. NOTE: Some devices do not require this.

Refit electric control panel cover:

Refit panel (C) and secure with screws (B).

NOTE: Both frost thermostats are fitted as standard to the external appliance to provide frost protection.

ELECTRICS

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 & PipeworkSHOWERS/BIDETS Filling Primary Sealed SystemsDomestic 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 DHorizontal 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 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 PRE-COMMISSIONING Checks ApplianceChecks 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 SmellsBase of the control box before replacing any components Neutral N and the pin, wire orMeasure 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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