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General| Model | Greenstar 25Si Compact |
|---|---|
| Category | Boiler |
| Output | 25kW |
| ERP Rating | A |
| Dimensions | 690 x 390 x 280 mm |
| Fuel Type | Natural Gas |
| Flow Rate | 10.2 l/min |
| Warranty | 5 years |
| Boiler Type | Combi |
| Mounting | Wall Mounted |
| Max Working Pressure | 3 bar |
| Central Heating Flow Temperature Range | 30°C to 80°C |
Explains symbols used for warnings and instructions.
Outlines critical safety measures to prevent hazards.
Details installation compliance with current gas, IET, and building regulations.
Lists relevant British Standard codes of practice for installations.
Provides an overview of the appliance and its standard package contents.
Illustrates the main boiler components with numbered references.
Presents detailed technical specifications for the boiler models.
Details the energy efficiency data according to EU regulations.
Instructions for cleaning the heating system before installation.
Covers electrical and gas supply requirements and safety.
Guidance on water supply, pressure, and hard water areas.
Details requirements for plastic pipework and primary system connections.
Guidance on installing condensate drainage pipes.
Methods for connecting condensate drainage internally to prevent freezing.
Guidance for external condensate drainage, including freeze prevention.
Instructions for routing and fitting the pressure relief pipe.
Specifies requirements for boiler placement and surrounding clearances.
Details the plumbing manifold connections and pipe dimensions.
Provides minimum clearances for flue terminal installations.
Outlines approved flue systems and their specifications.
Details maximum flue lengths for different flue system configurations.
Specifies positions and clearances for plume management terminals.
Guidance on calculating plume management system lengths.
Instructions for unpacking the wall frame and associated items.
Guides on using the template for drilling flue openings and fixing the frame.
Steps for safely unpacking the boiler unit.
Procedure for removing the boiler's outer casing.
Details pre-plumbing steps for condensate drain, PRV, gas, and water connections.
Instructions for safely lifting and hanging the boiler onto the wall frame.
Steps for connecting the expansion vessel to the pump manifold.
Guides on fitting the flue turret or adaptor securely.
Details electrical supply requirements and connections.
Instructions for mounting optional controls like programmers/timers.
Requirements for new system installations and zoning.
Options for room thermostats and programmers in existing systems.
Essential checks before starting the commissioning process.
Detailed steps for filling and venting the central heating system.
Guidelines for system cleaning, flushing, and inhibitor addition.
Procedures for safely starting the boiler and setting controls.
Explains the boiler's start-up display sequences and symbols.
Overview of the commissioning process and service mode operation.
Procedure for measuring and verifying gas inlet pressure.
How to measure the gas rate at the meter and check CO/CO2 ratios.
Steps for performing the gas rating test at maximum output.
Information on controlling hot water temperature and modes.
Mandatory checks for combustion performance and flue integrity.
Steps to complete the commissioning process.
Instructions for refitting the boiler's outer case.
How to secure the control panel after access.
Steps for initial inspection and routine service of the appliance.
How to check the integrity of the flue system using sample points.
Instructions for accessing internal boiler components by removing the case.
Verifying gas inlet pressure against system requirements.
Procedure for testing fan pressure to assess heat exchanger condition.
Detailed procedure for performing flue gas analysis checks.
Instructions for cleaning the heat exchanger.
Steps for removing and cleaning the condensate siphon.
General precautions for replacing boiler parts.
Steps for removing the boiler's outer case.
Instructions for safely draining the boiler.
Procedure for removing the condensate siphon.
Steps for removing and replacing the primary sensor.
How to remove and replace the maximum safety sensor.
Procedure for replacing the flue overheat thermostat.
Steps for removing and replacing the air pressure switch.
Instructions for removing and refitting the auto air vent.
Procedure for removing and replacing the gas valve.
Instructions for removing the fan assembly and related components.
Procedure for removing the air/gas flap valve assembly.
How to disconnect combustion air inlet and gas pipes.
Steps for removing and replacing the ignition transformer.
How to remove and replace the electrode assembly.
Instructions for removing the burner housing, burner, and gasket.
Procedure for removing the heat exchanger.
Instructions for removing the diverter valve motor and assembly.
How to remove and replace the DHW temperature sensor.
Procedure for removing and replacing the pump head.
Steps for removing the flow sensor, restrictor, and filter.
Procedure for removing the pressure gauge.
Steps for removing and replacing the boiler return sensor.
Procedure for removing and refitting the drain tap.
How to remove and replace the central heating pressure relief valve.
Steps for removing and replacing the DHW pressure relief valve.
Procedure for removing and replacing the DHW plate heat exchanger.
Instructions for removing the hydraulic block assembly.
Procedure for removing and replacing the bypass valve.
How to access boiler control components.
Detailed steps for replacing the boiler's control unit.
Steps for replacing the expansion vessel with the boiler fitted.
Steps for replacing the expansion vessel with the boiler removed.
A list of common spare parts with their part numbers.
Illustrates the internal wiring layout of the boiler for troubleshooting.
Flowchart detailing the central heating operation sequence.
Flowchart explaining the preheat and domestic hot water operation.
Explains the boiler's protection functions like frost and pump overrun.
Guide to accessing and interpreting boiler status and service codes.
Lists and explains boiler status codes for fault finding.
How to navigate and view information within the Information menu.
Instructions for navigating and selecting options within the service menus.
Notes that Menu 1 has no adjustable parameters for this model.
Details adjustable boiler parameters and their settings.
Procedure to reset boiler parameters to factory defaults.
How to adjust boiler maximum and minimum output limits.
Guide to using the test menu for component functionality checks.
Lists and explains various locking faults and their possible causes.
Lists and explains blocking errors and their possible causes.
