Need help?Do you have a question about the Unical ELL 420 and is the answer not in the manual?
Guidance on selecting, installing, commissioning gas appliances safely and legally.
Proper boiler usage instructions, manufacturer's liability exclusion for misuse.
Legal requirements for gas appliance installation and servicing by registered installers.
Table detailing connection types, sizes, and pressure ratings for ELLPREX 4500-7000.
Table listing physical dimensions for ELLPREX 4500-7000 models.
Requirements for boiler placement, ventilation, access, and floor stability.
Essential requirements for the chimney's construction and connection to the boiler.
Connecting expansion vessel and pressure relief valve for system safety and pressure compensation.
Burner conformity to directives, selection criteria, adjustment for optimal operation, and flame shape.
Wiring diagram illustrating electrical connections for the single-phase burner and pump on the panel board.
Electrical wiring diagram for single-phase burner and pumps.
Diagram showing electrical connections for sensors (boiler, DHW, room, outer) to the outer compensator terminal strip.
List of programmable parameters for installation, protected by access code, with value ranges and defaults.
Typical electrical and hydraulic connections for the central heating system with two heating zones.
Electrical and hydraulic connections for central heating and domestic hot water production circuits.
Guidelines for positioning turbulators inside smoke pipes for optimal seasonal efficiency and performance.
Essential checks before boiler operation: water, electrical, fuel connections, safety devices, and system integrity.
Procedures for initial boiler start-up: burner adjustment, performance checks, and safety device verification.
To Next Page
General