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Need help?Do you have a question about the EHC Fusion Comet Series and is the answer not in the manual?
Covers the 24-month warranty, excluded damages, and registration requirements.
Lists relevant building regulations, British Standards, and codes of practice for installation.
Details load checks, boiler location requirements, pipe insulation, and drain valve placement.
Recommends minimum clearances for maintenance and airflow, and stresses upright installation.
Covers qualified installation, safety, pipe connections, case removal, and isolation valves.
Details auto air vents, boiler sizing, insulation, system design, and water connections.
Emphasizes system flushing, pressure settings, and system types for optimal performance.
Step-by-step guide for securely mounting the boiler unit onto the wall.
Diagram identifying key internal parts like heat exchanger, sensors, pump, and control module.
Procedures for filling, purging, and checking both hot water and primary heating circuits.
Essential steps for cleaning the system with chemicals and adding protection to preserve warranty.
Detailed steps for integrating and commissioning the Grundfos UPM3 pump with the boiler.
Explains pump settings, LED indicators for operation, and how to interpret alarm statuses.
Emphasizes adherence to IEE regulations, use of qualified electricians, RCD protection, and earthing.
Details recommended protection methods and circuit breaker ratings for different boiler models.
Advises on recommended programmers and thermostats for heating and hot water systems.
Diagram illustrating wiring for a heating-only system with programmer and room thermostat.
Diagram showing wiring for S-plan systems with programmer, thermostats, and zone valves.
Details connections for optional shower sensors and external volt-free call signals (programmer/thermostat).
Shows the power supply and internal wiring connections for the 39kW 415V 3-phase model.
Illustrates the power supply and internal wiring for 14.4kW and 23kW 415V 3-phase models.
Shows the power supply and internal wiring for 4kW to 14.4kW 240V single-phase models.
Diagrams illustrating external wiring configurations for various power supplies.
Provides a diagram with all physical dimensions and recommended installation clearances.
Explains the control panel layout, buttons, and status indicator lights.
Guides on operating the boiler, setting temperatures, and using summer/winter modes.
A table correlating common symptoms with their causes and recommended troubleshooting procedures.
Comprehensive table detailing specifications for different Comet boiler models.
General| Fuel Type | Natural Gas or Propane |
|---|---|
| Efficiency | Up to 95% AFUE |
| Modulating Burner | Yes |
| Heat Exchanger Material | Stainless Steel |
| Ignition Type | Electronic |
| Warranty | 10 years on heat exchanger |
