Vaillant VRT350F Thermostat Instruction Manual

Name: Vaillant VRT350F Thermostat Instruction Manual
Brand: Manualverse
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Vaillant VRT350F Thermostat Instruction Manual

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📖 Manual 📋 Specifications 📝 Summary 💬 FAQs

Vaillant VRT350F Thermostat

User Manual

40 pages

Installation Guide

40 pages

Vaillant VRT350F Thermostat Instructions

Here we offer the Vaillant VRT350F 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 VRT350F Thermostat, we suggest checking the Frequently Asked Questions (FAQs) section of this manual.

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Vaillant VRT350F Thermostat Specifications

Feature	Vaillant VRT350F Thermostat (Control Unit)	Vaillant VRT350F Radio Receiver Unit
Power Supply Voltage	4 x 1.5 V (AA Batteries)	24 V
Battery Working Life	Approx. 1.5 years (alkaline)	N/A (eBUS powered)
Current Consumption	N/A	< 60 mA
Level of Protection	IP 20	IP 20
Protection Class	III	III
Max. Ambient Temperature	50 °C	50 °C
Transmission Frequency	868 MHz	868 MHz
Transmission Power	< 10 mW	< 10 mW
Range (Outdoors)	> 100 m	> 100 m
Range (Indoors)	Approx. 25 m	Approx. 25 m
Height	115 mm	115 mm
Width	147 mm	147 mm
Depth	50 mm	50 mm

Vaillant VRT350F Thermostat Details

The Vaillant VRT350F is a room-temperature-controlled thermostat designed for Vaillant heating systems utilizing an eBUS interface, also managing domestic hot water production. Its intuitive interface features a clear display, two context-sensitive selection buttons, and a central rotary knob for adjustments. To conserve battery life, the display automatically switches off, illuminating upon interaction. The thermostat continuously monitors room temperature, engaging or disengaging the heat generator to precisely maintain the user's desired temperature settings.

This thermostat offers a range of operating modes, including Automatic, Summer, Comfort, Set-back, and System OFF, each dictating heating and hot water behavior. Users can define up to three distinct time periods for both heating and hot water for individual days or blocks (e.g., Monday-Friday). The 'Days away scheduling' feature allows setting a specific duration and temperature for extended absences, overriding regular programming to ensure efficiency and frost protection.

For transient needs, the VRT350F includes special operating modes. The 'Cylinder boost' function provides a one-off heating of the domestic hot water cylinder outside programmed times. The 'Party function' temporarily sets the heating and hot water to comfort mode for social gatherings. Furthermore, the '1 day away from home' mode automatically sets a setback temperature for brief absences, ensuring energy savings without permanent program changes.

An essential frost protection function is built-in, automatically activating the heating if the room temperature drops below 5 °C to prevent system damage, even when the heating is otherwise off. The VRT350F communicates wirelessly with a dedicated radio receiver unit, which then connects to the boiler via an eBUS interface. This setup supports remote diagnostics and settings through Vaillant's internet communication system, providing comprehensive system oversight.

Users have extensive control over various settings, including day and night desired temperatures for heating, domestic hot water temperatures, current date, and time, with an option for automatic daylight saving adjustments. The display contrast is adjustable for optimal viewing. A unique offset room temperature feature allows for calibration if the thermostat's temperature reading differs from other room thermometers. Access is tiered, with a user-friendly operator level and a code-protected installer level for advanced configurations.

Frequently Asked Questions (FAQs)

Can't find the answer you need? Here are some frequently asked questions about the Vaillant VRT350F Thermostat, and we answer them below.

How do I change the batteries in my VRT350F Thermostat?

Pull the controller upwards off its wall-mounting base. Open the battery compartment on the underside using the catch, remove the cover, and insert four new 1.5V Alkaline AA/LR6 batteries, ensuring correct polarity. Close the compartment, then hook the controller back onto the wall-mounting base until it clicks.

What does 'Service Heat Generator 1' or 'Service' message mean?

These are service messages indicating that your heating installation requires maintenance by a skilled tradesman. It's crucial to inform a professional to prevent potential material damage or system failure.

My thermostat display is dark. What should I do?

A dark display typically means the batteries are empty and need replacing. If replacing batteries doesn't resolve it, there might be an appliance fault. In that case, switch off the heat generator's main switch for approximately one minute, then switch it back on. If the fault persists, contact a competent person.

How do I adjust the desired room temperature for just the current day?

From the basic display, turn the rotary knob to set the desired temperature. A prompt will appear asking if you want to apply this change for "Only today" or "For permanent change." If you do nothing further, it applies "Only today" until the end of the active time period.

What is the 'Party function' and how do I use it?

The Party function is a special operating mode that temporarily switches on the heating circuit and hot water generation to the set desired day temperature, overriding regular time programs. Activate it from the "Operating mode" menu. It deactivates automatically at the next scheduled time period or if you cancel it early.

How does the frost protection function work?

The frost protection function actively monitors the room temperature. If it drops below 5 °C, the controller automatically switches on the heater to maintain a target room temperature of 5 °C, preventing damage to your heating system and property. It remains active even if the heating is otherwise switched off.

Can I adjust the hot water temperature with this thermostat?

Yes, if a domestic hot water cylinder is connected to your heating installation, you can set the desired hot water circuit temperature between 35 °C and 70 °C via Menu → Desired temperatures → Domestic hot water.

What is the '1 day away from home' function?

This advanced function is designed for short absences, like a day trip. It brings the room temperature to the desired Set-back temperature and switches off hot water generation while keeping frost protection active. It automatically deactivates after 24 hours or if canceled.

How do I reset only the time programmes to factory settings?

Navigate to Menu → Basic settings → Factory reset → Time programmes. Select "Yes" to reset all customized time period settings to their default values. This will not affect other settings like date or time.

What is the purpose of the 'Offset Room Temperature' setting?

This function allows you to calibrate the thermostat's internal temperature sensor. If you notice a consistent difference between the VRT350F's displayed room temperature and another thermometer in the same room, you can set a correction value (e.g., +1 K or -0.5 K) to match them more accurately.