Introduction
This manual provides comprehensive instructions for the installation, operation, and maintenance of the VEMER VE773200 CT 24H wall-mounted daily chronothermostat. This device is designed for precise temperature regulation in both heating and air conditioning systems, featuring easy programming thanks to its comfortable jumpers.
Product Overview
The VEMER VE773200 CT 24H is a daily chronothermostat designed for accurate temperature control. It features a digital display, a rotary dial for temperature setting, and programming jumpers for scheduling.

Front view of the VEMER VE773200 CT 24H chronothermostat, showing the digital time and temperature display on the left, the temperature setting dial on the right, and control buttons below the display. A power/mode switch is located at the top center.
Installation
This section details the steps required to properly install your VEMER VE773200 CT 24H chronothermostat.
Mounting
The chronothermostat is designed for wall mounting or installation on a 503-type box or similar.
- Choose a suitable location on an interior wall, away from direct sunlight, drafts, or heat sources that could affect temperature readings.
- Carefully open the device casing to access the mounting holes and wiring terminals.
- Secure the chronothermostat base to the wall using appropriate screws and wall plugs.
- Connect the wiring according to the electrical diagram (refer to the diagram provided in the packaging, not available in this digital manual). Ensure all connections are secure.
- Close the device casing.
Battery Installation
The device is powered by batteries.
- Locate the battery compartment, typically on the rear or underside of the device.
- Insert two 1.5V AA LR6 alkaline batteries, ensuring correct polarity (+/-).
- Close the battery compartment cover.
Operation
Learn how to use your VEMER VE773200 CT 24H chronothermostat for effective temperature management.
Setting the Time
Use the time setting buttons (usually marked with a clock icon) to adjust the current time displayed on the screen.
Programming with Jumpers (Cavaliers)
The chronothermostat features daily programming via jumpers. The minimum programming interval is 60 minutes.

Front view of the VEMER VE773200 CT 24H chronothermostat with the lower cover open, exposing a row of red programming jumpers (cavaliers) numbered 1-23. These jumpers are used to set the hourly heating/cooling schedule. Control buttons for time and mode are visible above the jumper section.
- Open the front cover to access the programming jumpers.
- Each jumper corresponds to a specific hour of the day.
- Push the jumpers down for the hours you want the heating/cooling system to be active (e.g., at the set temperature).
- Leave the jumpers up for the hours you want the system to be inactive or at a reduced temperature.
- Close the front cover after programming.
Operating Modes
The chronothermostat offers three distinct operating modes:
- Automatic Mode: The device follows the programmed schedule set by the jumpers.
- Manual Mode: The device maintains a constant temperature set by the rotary dial, overriding the programmed schedule.
- Off Mode: The heating/cooling system is turned off.
Use the mode selection switch (often combined with the power switch) to cycle through these modes.
Temperature Setting
Use the large rotary dial on the right side of the device to set the desired temperature. The display will show the current and set temperatures.
Screen Backlight
The blue backlight of the screen activates when a button is pressed, improving visibility in low-light conditions.
Maintenance
Battery Replacement
When the battery indicator appears on the display, replace the batteries promptly to ensure continuous operation.
- Open the battery compartment.
- Remove the old batteries.
- Insert two new 1.5V AA LR6 alkaline batteries, observing correct polarity.
- Close the battery compartment.
Cleaning
Clean the device with a soft, dry cloth. Do not use abrasive cleaners or solvents.
Troubleshooting
This section addresses common issues you might encounter with your chronothermostat.
- Device not powering on:
Check if the batteries are correctly inserted and have sufficient charge. Replace batteries if necessary.
- Incorrect temperature reading:
Ensure the device is not exposed to direct sunlight, drafts, or other heat sources that could interfere with its internal sensor.
- Programmed schedule not followed:
Verify that the device is in "Automatic Mode." Check the position of the programming jumpers to ensure they are set correctly for the desired schedule.
- Display issues:
If the display is dim or flickering, replace the batteries. If the issue persists, contact customer support.
- System not responding to temperature changes:
Ensure the wiring connections to your heating/cooling system are secure. If the issue persists, consult a qualified technician.
- Resetting the device:
A small "RESET" button is available (often recessed) which can be pressed with a pointed object to restore factory settings. Note that this will erase all programmed settings.
Specifications
- Brand: VEMER
- Model Number: VE773200
- Color: White
- Dimensions (Package): 16.6 x 9.4 x 4.4 cm
- Weight (Item): 240 grams
- Voltage: 250 Volts
- Power Source: Battery Powered (2 x 1.5V AA LR6 alkaline batteries required)
- Connectivity Technology: Wired
- Control Type: Manual Control
- Temperature Control Type: Manual
- Special Features: Backlit display, Suspension mode (e.g., 'Off' or 'Standby' mode), Filter indicator (if applicable)
- Minimum Programming Interval: 60 minutes
- Operating Modes: Automatic, Manual, Off
- Output: Relay output with changeover contact 8 (3) A 250 V (status indication via LED)
- Installation: Wall-mounted and on 503-type box or similar
- Country of Origin: China
- ASIN: B09S36NL8L
Note: While "Rechargeable battery" and "Filter indicator" are listed in some specifications, the product description and feature bullets specify non-rechargeable alkaline batteries and do not detail a filter function. The information provided here reflects the most consistent details.
Warranty and Support
Specific warranty details and direct customer support contact information are not provided in the product data. Please refer to the product packaging or the manufacturer's official website for warranty terms and support options.





