Vaillant VRT350 Thermostat Instruction Manual

Name: Vaillant VRT350 Thermostat Instruction Manual
Brand: Manualverse
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Vaillant VRT350 Thermostat Instruction Manual

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📕 Manual PDF 📄 36 Pages

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📖 Manual 📋 Specifications 📝 Summary 💬 FAQs

Vaillant VRT350 Thermostat

User Manual

36 pages

Installation Guide

24 pages

Vaillant VRT350 Thermostat Instructions

Here we offer the Vaillant VRT350 Thermostat manual completely free and in English. We have cataloged this manual in the Thermostats section on Manualverse, and it has been rated by 1 users with an average rating of 5. If you have any specific questions about Vaillant VRT350 Thermostat, we suggest checking the Frequently Asked Questions (FAQs) section of this manual.

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Vaillant VRT350 Thermostat Specifications

Specification	Value
Product Article Number	0020124475
Operating Voltage (Umax)	24 V
Power Consumption	< 50 mA
Supply Line Cross-Section	0.75 to 1.5 mm²
IP Rating	IP 20
Protection Class	III
Max. Permissible Environmental Temperature	60 °C
Rated Surge Voltage	330 V
Pollution Degree	2
Mode of Operation	Type 1
Height	97 mm
Width	147 mm
Depth	50 mm

Vaillant VRT350 Thermostat Details

The Vaillant VRT350 Thermostat offers intuitive room-temperature-controlled management for Vaillant heating installations and domestic hot water. Operating via an eBUS interface, it facilitates seamless data exchange and power supply, supporting integration with Vaillant's diagnosis software and Internet communication systems for advanced remote capabilities. Users can effortlessly set preferred temperatures for heating and hot water across specific times and days, ensuring optimal comfort and efficiency tailored to their schedule. This intelligent control reacts directly to room temperature fluctuations, activating or deactivating the heater as needed to maintain consistent comfort levels.

Beyond heating, the VRT350 effectively manages domestic hot water generation for a connected cylinder. It allows for precise scheduling of hot water availability, aligning with household routines. A significant enhancement is its capability to integrate with a VR 66 Control Centre, enabling the VRT350 to manage two independent heating circuits. In such setups, one VRT350 acts as the main controller for Zone 1, offering full functionality, while a second VRT350 can serve as an auxiliary controller for Zone 2, providing tailored temperature and time period settings.

A crucial safety feature of the VRT350 is its integrated frost protection function. This actively monitors room temperature, automatically activating the heating system if the temperature drops below 5 °C to prevent potential damage. The thermostat features a clear, accessible display, presenting current settings, room temperature, desired temperature, date, and time at a glance. Its operating structure is designed for ease of use, featuring basic, selection, and setting levels, navigated by soft keys and a rotary knob.

Users can customize heating and hot water availability with flexible time programmes, allowing up to three distinct time periods for individual days or combined blocks (e.g., Monday-Friday). These schedules are particularly effective in Automatic mode, transitioning between desired day (comfort) and night (set-back) temperatures. The VRT350 offers various operating modes including Automatic, Summer, Comfort, Set-back, and System OFF, providing comprehensive control over the heating system's behavior.

For temporary adjustments, the VRT350 includes practical special operating modes. These include "Cylinder Boost" for on-demand hot water, "Party" function to extend heating and hot water to comfort levels temporarily, and "1 Day Away From Home" for a short-term set-back with frost protection. Additional user settings allow for language selection, date/time configuration, automatic daylight saving adjustments, display contrast modification, and even a room temperature offset for precise calibration. The system also alerts users to service needs or faults via clear messages, ensuring timely maintenance.

Frequently Asked Questions (FAQs)

Can't find the answer you need? Here are some frequently asked questions about the Vaillant VRT350 Thermostat, and we answer them below.

What is the intended use of the Vaillant VRT350 Thermostat?

It is intended for controlling a Vaillant heating installation with an eBUS interface and domestic hot water generation for a connected domestic hot water cylinder.

How does the frost protection function work?

The frost protection function monitors the room temperature. If it falls below 5 °C, the controller switches the heater on to maintain a target room temperature of 5 °C. If it exceeds 5 °C, the heater switches off, but monitoring remains active.

Can children use the VRT350 Thermostat?

Yes, children aged 8 years and above and persons with reduced physical, sensory or mental capabilities can use it if they have been given supervision or instruction and understand the hazards involved. Cleaning and user maintenance must be supervised.

What should I do if the VRT350 display is dark?

This may indicate an appliance fault. Switch off the main switch on all heat generators for approximately 1 minute and then switch them on again. If the fault persists, contact a competent person.

How do I change the desired day temperature temporarily for the current day?

From the basic display, turn the rotary knob to set the desired temperature. The display will show an option for "Only today". The set temperature will apply only until the end of the active time period of the current day.

What is the Party function and when should I use it?

The "Party" function is a special operating mode that temporarily switches on the heating circuit and hot water generation to the desired Day temperature, overriding programmed time periods. It's useful for events or gatherings when you need comfort outside your normal schedule.

What does a service message like Service heat generator 1 mean?

A service message indicates that the heating installation requires servicing by a competent person. Ignoring these messages could lead to material damage or system failure. You should inform a skilled tradesman.

Can the VRT350 control multiple heating zones?

Yes, if a VR 66 Control Centre is connected, one VRT350 can control two independent heating circuits. One VRT350 acts as the main controller for Zone 1, and another can act as an auxiliary controller for Zone 2.

How do I access the Installer level settings?

The "Installer level" is reserved for competent persons and is protected by a code. Only qualified technicians should make changes in this level. If the code is lost, the control must be reset to factory settings, which should also be done by a competent person.

What is the 1 Day away from home function?

This special operating mode is for short absences, like a day trip. It sets the room temperature to the desired Set-back temperature and switches off hot water generation, while still maintaining frost protection. It automatically deactivates after 24 hours.

How do I adjust the display contrast?

You can set the display contrast via the menu: Menu → Basic settings → Display → Display contrast. This ensures the display is clearly legible in varying ambient light conditions.

What does the offset room temperature setting do?

This function allows you to calibrate the room temperature reading if it consistently differs from another thermometer in the same room. You can set a correction value (e.g., +1 K) to adjust the controller's displayed temperature.