Roca LAURA 20 User Manual

Wall-Hung On-Demand Combination Waterheater
LAURA 20/20F

Roca LAURA 20 Specifications

General

Brand	Roca
Model	LAURA 20
Category	Boiler
Language	English

Summary

Overall View

Overall Dimensions

Pre-Plumbing Jig and Wall Spacing Frame

Installation Recommendations

Start-Up Checklist (I)

Start-Up Checklist (II)

Pressures of Gas

Electronic PCB

Electrical Wiring

Electrical Wiring

Main Components (I)

Main Components (II)

Control Panel

Sleeve

Demand for Heating

Demand for DHW

Demand for DHW

Stop and Fault

Set Time

Hydraulic Circuit

Mains Water Inlet

Flow Detector Device

Mini-Accumulator

Safety Valve and By-Pass

3-way Valve

Gauge and Lack-of-Water Pressure Switch

Central Heating Mode Operation

DHW Mode Operation

Overheat Thermostat

Flame Safeguard Rectification System (I)

Flame Safeguard Rectification System (II)

Chimney "Pull" Safety 20/20

Process of Code 22

Burner

Combustion Chamber

Kit Valve G20 and G25

Cross-section of Gas Valve

Gas Changeover Kit

Flue Components of the Waterheater

Flue Duct Kit (I)

Flue Duct Kit (II)

Flue Duct Kit (V)

Flue Duct Kit (VII)

Central Heating Programming (I)

Central Heating Programming (II)

Central Heating Programming (III)

Central Heating Programming (IV)

Central Heating Programming (V)

Set-up (I)

Set-up (II)

Maintenance

Fault Codes

Error Codes

Code 01 & 02: Sensor Interruption

Troubleshooting for sensor interruptions in DHW and Heating circuits.

Code 03: Low Heating Circuit Pressure

Troubleshooting for low heating circuit pressure, indicating lack of water.

Code 06: Overheating After Flame

Troubleshooting for overheating issues after flame extinction due to circulation problems.

Code 14: Overheating During Flame

Troubleshooting for overheating during flame, sensor contact issue.

Code 09: Solenoid Valve Circuit Open

Troubleshooting for open solenoid valve circuit, loose connector, or faulty panel.

Code 12: Flame Detection Error at Start-up

Troubleshooting for flame detection errors during the start-up ignition phase.

Code 17: Flame Detection Error During Boiler Function

Troubleshooting for flame detection errors while the burner is already operating.

Code 19: Pressure Switch Problems

Troubleshooting for issues related to the pressure switch connection or function.

Code 20: Exhaust System Problems

Troubleshooting for issues concerning the exhaust system, pipe length, or connections.

Outlines Hydraulic (I)

Outlines Hydraulic (II)