Saswell T19 7 RF black

Product detailed description

The SASWELL T19 7 RF is commonly used in residential and small commercial buildings where wireless control of heating systems is required. It is ideal for installations where running wires is impractical or costly. The thermostat is compatible with conventional heating systems, including radiators and underfloor heating, and supports both surface and recessed mounting. Installers working on retrofit projects or new builds with limited access to wiring will find this model suitable for its flexibility and ease of integration.

The device is designed for use in environments with ambient temperatures ranging from 0°C to 50°C and is suitable for installation in control rooms, living areas, and utility spaces. It supports a variety of heating system configurations and is particularly useful in systems requiring weekly programming for energy efficiency and comfort. The receiver allows for manual override of heating output, which is beneficial in troubleshooting or temporary adjustments.

Technical parameters

EAN	3838088460419
Package dimensions (mm)	100/150/100
Thermostat type	wireless
Power supply	battery
Programming	weekly program
Weight	0.54 kg
Code	T19XWHB-7-RF/SL/
Brand	SASWELL

The thermostat operates on four AAA batteries (LR03 1.5V) and the receiver is powered by AC 100-240V at 50/60Hz. The temperature range for operation is from 5°C to 35°C, with a display range of 5°C to 40°C. The thermostat supports up to six different temperature and time settings per day, allowing for detailed weekly programming. The ±0.1°C accuracy ensures precise control, while the 868 MHz RF frequency with FSK modulation ensures reliable communication over distances of up to 100 metres. These parameters are essential for system sizing and compatibility checks with existing heating circuits.

Installation and connection

The SASWELL T19 7 RF is installed using a built-in mounting plate for surface or recessed mounting. The receiver must be connected to the heating system’s control circuit, typically via a 230V AC supply. The thermostat communicates with the receiver wirelessly, eliminating the need for additional wiring between the two components. During installation, ensure the mounting surface is flat and stable, and verify that the receiver is positioned within the 100-metre range for optimal signal strength. Common installation mistakes include incorrect orientation of the mounting plate, failure to secure the device properly, and neglecting to check the battery compartment for proper closure after installation.

Compatibility and accessories

The SASWELL T19 7 RF is compatible with standard heating systems and can be used with underfloor heating via an NTC100K sensor connected to the receiver. It is supplied with the 2011DE receiver, which must be connected to the heating system’s control output. The thermostat supports manual switching of the heating output, which is useful in troubleshooting or system adjustments. For alternative options, the Euroster Q1 TX is a comparable model that may be considered for similar applications. Additional accessories such as mounting plates or wall boxes may be required depending on the installation method.

Technical background for designers

The SASWELL T19 7 RF operates on a wireless RF communication protocol at 868 MHz using FSK modulation. The thermostat controls the heating system by sending signals to the receiver, which in turn regulates the heating output. The device is constructed with a durable housing and a touch-sensitive keypad, ensuring long-term reliability in varying environmental conditions. The use of a battery-powered design eliminates the need for electrical wiring at the thermostat location, making it suitable for retrofitting into existing systems. The integration of the NTC100K sensor allows for precise temperature monitoring in underfloor heating applications. The system’s efficiency is influenced by the placement of the thermostat and the stability of the RF signal between the thermostat and the receiver.

Service and operation

The SASWELL T19 7 RF requires minimal maintenance. The battery life is typically long, and a low-battery warning is displayed when replacement is needed. During operation, the thermostat maintains all programmed settings even during power outages or battery changes. The lock function prevents accidental changes to the settings, and the freeze protection feature ensures the system remains active in low-temperature conditions. The device also supports a holiday mode for temporary adjustments. No scheduled service intervals are required, but the battery should be replaced when the warning is displayed. The receiver has an IP21 rating, making it suitable for indoor use in dry environments.

Frequently asked questions

Can the SASWELL T19 7 RF be used with underfloor heating systems?
Yes, it can be used with underfloor heating by connecting an NTC100K sensor to the receiver. This allows for accurate temperature monitoring and control.

Is the thermostat programmable for different days of the week?
Yes, it supports weekly programming with options for 7 days, 5 working days plus 2 weekend days, or custom combinations of 5 + 1 + 1/4 or 6 different settings per day.

Can the thermostat be manually overridden in case of system issues?
Yes, the receiver allows for manual switching of the heating output, which is useful for troubleshooting or temporary adjustments.

What is the maximum range of the RF signal?
The RF signal has a maximum range of up to 100 metres, depending on environmental conditions and line of sight between the thermostat and the receiver.