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General| Brand | Viessmann |
|---|---|
| Model | OpenTherm |
| Category | Temperature Controller |
| Language | English |
Follow these safety instructions to prevent accidents and material losses.
Explanation of safety symbols: Danger, Please note, Note.
Operating instructions are for heating system users, including supervised children and individuals with limited faculties.
Connection and commissioning by authorised contractors; use suitable fuels; adhere to electrical requirements.
Follow instructions for settings and work. Only authorised contractors for additional work. Never open appliance or remove cladding.
Damaged equipment poses a safety hazard. Check for external damage; never start a damaged appliance.
Escaping gas can lead to explosions and serious injury. Do not smoke, switch lights on/off. Close gas valve, open windows.
Flue gas can cause life-threatening poisoning. Shut down the system, ventilate the site, close doors.
Call National Gas Emergency service for gas leaks. Notify suppliers and contractor. Shut off electricity supply safely.
Fire risk from burns and explosion. Shut down system, close fuel supply valves, use tested fire extinguisher.
Risk of electrocution if water escapes. Switch off heating system at external isolator and notify contractor.
Fault messages indicate life-threatening issues if not rectified. Inform contractor for analysis and repair.
Sealed vents cause CO risk. Never cover vents. Avoid modifications affecting safe operation. Flammable materials pose fire risk.
Appliances extracting air can create negative pressure, leading to flue gas reversal and poisoning. Ensure adequate combustion air.
Use only tested components. Untested parts may damage the system. Installation/replacement by qualified contractors only.
Explanation of symbols used in the document, including warnings, references, and disposal instructions.
Appliance for sealed unvented heating systems, heating potable water. Any other use or modification is prohibited.
Explains the two possible function modes: ROOM-CONTROL (room temperature-dependent) and OT CONTROL (weather-compensated).
Overview of the room temperature controller's display and control elements.
Detailed identification of the display, rotary selector, keys, and reset function.
Explanation of symbols that may appear on the display depending on operating conditions.
Details the function of the control buttons: ESC, arrow keys, and OK.
Describes the default display and how to access control mode. Explains operation via keys or rotary selector.
Explains room temperature-dependent vs. weather-compensated operation and their variations.
Options for selecting time programs (P1-P3) or permanent modes, and preselected temperature levels.
Step-by-step instructions for selecting the time program or operating mode.
Details of preset time programs P1 and P2 for central heating based on weekdays and times.
Details of preset time program P3 for central heating based on weekdays and times.
Description of permanent operating modes: PERM COMFORT, PERM REDUCED, and FROST PROTECTION.
Instructions for changing selected time programs, set temperatures, and individual time phases.
Step-by-step guide to creating new time phases for programs.
Procedure to view the set switching times for a program.
Instructions on how to delete an entire time program.
Options for time programs (P1-P3) and permanent modes for central heating operation.
How to temporarily adjust the set room temperature, regardless of the current program.
Details on setting and adjusting the room temperature in Comfort mode.
Details on setting and adjusting the room temperature in Reduced mode.
How to permanently set target temperatures for COMFORT, REDUCED, and FROST PROTECTION modes.
Explanation of heating curves and their relationship to outside temperature and flow temperature.
Measures to change heating curve parameters (LOW END, END POINT, SHIFT) for desired room temperatures.
Step-by-step instructions for setting the heating curve parameters.
Instructions for setting a holiday program, including start and end dates and frost protection temperature.
Procedure to stop, interrupt, and reactivate the holiday program.
How to set time phases for DHW heating and adjust the set DHW temperature.
Procedure to temporarily adjust the DHW temperature for one hour.
Instructions for setting the current time and date on the device.
How to configure the automatic adjustment for summer and winter time.
Guide to accessing and configuring further settings under the 'OPTIONS' menu.
Steps to select the desired language for the device interface.
Instructions for selecting different display versions for the device.
How to adjust the display contrast in stages for better readability.
Procedure to activate and deactivate the key lock to prevent unintended operation.
Instructions to change the display format of fault messages to HEXADECIMAL.
Procedure to reset all settings to their delivered condition. All custom settings will be lost.
How to check current outside temperature, active time program, fault messages, set/actual flow temperatures, and date/time.
Troubleshooting steps for rooms being too cold or too hot by checking program, room temperature, and time settings.
Instructions on how to perform a system reset using the reset button.
Guidelines for cleaning the device using a commercially available domestic cleaning agent. Avoid scouring agents.
Outline of the menu structure available in setting mode (MODE).
Detailed outline of the menu structure available within the settings section.
Note on the availability of the TSP-PARAMETER menu point based on system configuration.
Advice on contacting a local contractor for system questions, maintenance, or repair, and finding them online.
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