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Maestro 105/2 RCH
Maestro 105/3 RCH
G20/G25/G25.3 (Natural gas) G31 (Propane)
Installation manual
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Summarization of Contents

Introduction and Safety
CE Declaration and Compliance
Details DRU's compliance with essential requirements and directives for gas combustion appliances.
General Safety Instructions
Observe general regulations and safety instructions for proper installation.
Applicable Installation Regulations
Install the appliance according to national, local, and constructional regulations.
Specific Installation Safety Precautions
Detailed precautions for safe installation, including materials, ventilation, and wiring.
Installation Procedures
Packaging Removal and Ignition Cycle
Guide for removing packaging and understanding the appliance ignition cycle.
Gas Type and Pressure Verification
Check data plate for intended gas type and pressure suitability.
Gas Connection Guidelines
Instructions for making a safe and compliant gas connection, including tap placement.
Electrical Connection Requirements
Proper grounding and placement of electrical connections away from heat sources.
Appliance Placement and Clearance
Guidelines for placing the appliance, ensuring non-combustible materials and proper clearances.
Installing Built-in Appliances
Specific instructions for built-in models, including control hatch requirements.
Chimney Breast Installation
Ensuring sufficient space and ventilation for the chimney breast for proper heat discharge.
Control Hatch Installation Guide
Detailed steps for placing the control hatch, its components, and orientation.
Concentric System Installation
Guidelines for installing the concentric system, including general information and construction.
Concentric System General Information
Overview of DRU's concentric system for flue gas discharge and combustion air supply.
Concentric System Construction Details
Determining permissibility and adjusting the concentric system based on configuration and terminal type.
Concentric System Placement Guidelines
Instructions for placing the concentric system, including distances, insulation, and fastening.
Connecting to Existing Chimneys
Guidelines for connecting the appliance to an existing chimney using a flexible SS pipe.
Additional Installation Instructions
Further instructions for appliance mounting, service access, and clearance requirements.
Suspended Appliance Mounting
Steps for suspending the appliance from the wall using brackets and adjustable feet.
Optional Installation Configurations
Options for appliance installation with platforms, decorative strips, or connecting to glass.
Platform with Lower Decorative Strip
Instructions for creating a platform recess for the appliance with a lower decorative strip.
Platform Connecting to Glass
Steps for creating a platform recess that connects to the appliance's glass.
Back Wall Installation Next to Side Pane
Guidelines for installing the back wall next to the side pane, maintaining specific distances.
Handling Glass Panes
Precautions for handling glass panes, including opening and closing procedures.
Opening the Front Glass Pane
Step-by-step instructions for safely opening the front glass pane for access.
Closing the Front Glass Pane
Procedure for correctly closing the front glass pane after access or maintenance.
Appliance Setting and Adjustment
Setting the appliance for correct operation with the concentric system, including adjustments.
Restrictor Slide and Flue Gas Plate Settings
Instructions for installing and positioning the restrictor slide and flue gas distribution plate.
Air Inlet Guide Installation
Steps for removing the vermiculite plate and installing the air inlet guide.
Wood Set Placement Instructions
Guidelines for safely placing the wood set for proper burner function and flame picture.
Detailed Wood Set Placement
Specific instructions for placing logs, vermiculite, chips, ash, and glow material.
Control Systems and Final Checks
Remote Control Operation
Instructions for setting up and using the black remote control for the user.
Alternative Control Methods
Overview of alternative control options, including wired and wireless Domotics systems.
Wireless Control Options
Details on wireless control via Modbus protocol or DRU Control App.
Modbus Protocol Wireless Connection
Connecting a Domotics system wirelessly via Modbus protocol using a communication module.
Application Control via Wireless
Controlling the appliance via tablet using the DRU Control App and a communication module.
Final Inspection Procedures
Procedures for final checks before appliance operation.
Gastightness Checks
Ensuring all gas connections are gastight and checking gas control pressure limits.
Gas Pressure and Line Pressure Checks
Verifying burner pressure and house line pressure for correct operation.
Main Burner Ignition
Procedure for first ignition after installation, including troubleshooting steps.
First Ignition Procedure
Detailed steps for initial appliance ignition, including checks and resets.
Main Burner Operation Check
Checking the main burner's ignition and smooth burning after initial startup.
Assessing the Flame Picture
Evaluating the flame picture after several hours of burning and consulting troubleshooting.
Maintenance, Delivery, and Appendices
Annual Appliance Maintenance
Instructions for annual inspection, cleaning, and repair by a qualified installer.
Appliance Delivery and User Handover
Explaining appliance operation, safety, remote control, and maintenance to the user.
Troubleshooting Malfunctions
Overview of common malfunctions, their causes, and remedies provided in Appendix 1.
Appendix 1: Malfunction Codes and Remedies
Detailed list of error codes, problems, causes, and suggested remedies for troubleshooting.
Appendix 2: Technical and Setting Information
Includes parts list, technical data, line-pressure, and concentric system conditions.
Appendix 2: Parts and Conditions Tables
Lists of parts included with delivery and conditions for appliance settings with wall terminals.
Appendix 2: Technical Data
Detailed technical specifications for the Maestro 105/2 RCH and 105/3 RCH appliances.
Appendix 2: G31 Line-Pressure by Country
Table showing required line-pressure values for G31 gas in different European countries.
Appendix 2: Setting Conditions with Wall Terminal
Conditions for setting the appliance based on concentric system configuration with a wall terminal.
Appendix 2: Roof Terminal Permissibility
Table to determine concentric system permissibility with roof terminals based on pipe lengths and bends.
Appendix 2: Roof Terminal Adjustment Conditions
Conditions for adjusting the appliance with a roof terminal, specifying guide and slide settings.
Appendix 3: Installation Figures
Diagrams illustrating appliance dimensions and installation configurations.

Table of Contents