Honeywell CM907
Background
The Honeywell CM907 is a programmable thermostat designed for use in domestic and light commercial heating systems. It is a popular choice for homeowners and installers due to its flexibility, ease of use, and energy-saving features.
Some of the key features of the Honeywell CM907 include:
- 7-day programming – The unit allows you to set different heating schedules for each day of the week, providing flexibility and energy savings.
- 6 time and temperature settings per day – The CM907 allows you to set up to six different temperature settings for each day, giving you greater control over your heating system.
- Large LCD display – The CM907 features a large, easy-to-read display that shows the current temperature, the time, and the status of the heating system.
- Pre-set heating schedules – The CM907 comes with pre-set heating schedules that can be easily customized to suit your specific needs.
- Holiday mode – If you’re going away, the CM907 can be set to holiday mode, ensuring that your heating is turned off while you’re away.
- Frost protection – The CM907 has a built-in frost protection feature that will turn on the heating if the temperature drops below a certain level, preventing pipes from freezing.
Overall, the Honeywell CM907 is a reliable and user-friendly programmable thermostat that can help you save money on your heating bills while keeping your home comfortable.
How to operate
- Turn on the power supply to the CM907 by switching on the electricity supply to the unit.
- Set the clock by pressing the ‘SET’ button, then use the ‘+’ and ‘-‘ buttons to adjust the hour and minute. Press ‘SET’ again to confirm.
- To set the heating schedule, press the ‘PROGRAM’ button. You can then use the ‘+’ and ‘-‘ buttons to select the day of the week you want to program. Once you have selected the day, press ‘PROGRAM’ again.
- Set the ‘ON’ and ‘OFF’ times for each temperature setting using the ‘+’ and ‘-‘ buttons. Once you have set the times, press ‘PROGRAM’ to move onto the next time period.
- Repeat this process for each temperature setting for each day of the week until you have set your complete schedule.
- Once you have set your schedule, you can use the ‘+’ and ‘-‘ buttons to adjust the temperature settings for each time period.
- If you need to override the schedule and turn the heating on outside of the programmed times, simply press the ‘Override’ button until the heating comes on. To turn it off again, press the ‘Override’ button again.
- To enter holiday mode, press and hold the ‘Override’ button for 5 seconds. The CM907 will then switch to holiday mode, turning off the heating until you return and switch it back to normal mode.
That’s a basic overview of how to operate the Honeywell CM907. For more detailed instructions, you should refer to the user manual that came with your unit.
Video
Technical information
| SPECIFICATION | |
|---|---|
| Brand | Honeywell |
| Central heating control type | Programmable thermostat |
| Heating system compatibility | The CM907 is compatible with a wide range of heating systems, including: Gas boilers Oil boilers Electric heating systems Hydronic underfloor heating systems Warm air heating systems However, before purchasing a Honeywell CM907 thermostat, it is important to ensure compatibility with your specific heating system. The thermostat can be installed by a professional heating engineer, who can advise you on compatibility and provide installation services. It is also important to note that the Honeywell CM907 is a wired thermostat and requires a mains power supply. If you do not have a mains power supply in the location where you want to install the thermostat, you may need to consult a qualified electrician to have one installed. |
| Control operation | The Honeywell CM907 is a programmable room thermostat that allows you to set the temperature in your home or office according to a pre-set schedule. Here’s how to operate the thermostat: Setting the time and date: To set the time and date on the thermostat, press and hold the ‘Day’ and ‘Hour’ buttons until the correct time and date are displayed. Setting the temperature: To set the temperature, press the ‘Temp’ button and use the ‘Day’ and ‘Hour’ buttons to adjust the temperature up or down. Programming the schedule: The CM907 allows you to program up to six temperature changes per day, so you can set the thermostat to turn the heating on and off according to your schedule. To program the schedule, press the ‘Prog’ button and use the ‘Day’ and ‘Hour’ buttons to set the desired temperature for each time period. Overriding the schedule: If you need to override the programmed schedule, you can do so by pressing the ‘Temp’ button and adjusting the temperature up or down. The override will last until the next scheduled temperature change. Holiday mode: If you are going away on holiday and want to save energy, you can use the ‘Holiday’ mode to set a lower temperature while you are away. To activate this mode, press and hold the ‘Prog’ button until ‘Holiday’ appears on the screen. Use the ‘Day’ and ‘Hour’ buttons to set the start and end dates, and the ‘Temp’ button to set the desired temperature. Frost protection: The CM907 also has a frost protection mode, which will turn the heating on if the temperature in the room drops below a certain level. To activate this mode, press and hold the ‘Temp’ button until ‘FP’ appears on the screen, then use the ‘Day’ and ‘Hour’ buttons to set the desired temperature for frost protection. Overall, the Honeywell CM907 is a versatile and user-friendly thermostat that can help you save energy and keep your home or office comfortable all year round. |
| Temperature range | 0°C to 40°C |
| Display type | Large, backlit display with touchscreen interface |
| Hertz (Hz) | Designed to operate on a 230V AC, 50Hz power supply. |
| Switch rating | For 230V AC heating systems, the maximum switch rating of the CM907 is 10A resistive (2.3kW) and 3A inductive (690W). For 24V AC heating systems, the maximum switch rating of the CM907 is 2A resistive (48W) and 1A inductive (24W). It is important to note that the switch rating of the CM907 should not be exceeded, as this can cause damage to the thermostat or the heating system. If you are not sure about the switch rating of your heating system, you should consult a qualified heating engineer or electrician before installing the CM907 thermostat. |
| Max. load (Inductive) | 3 A |
| Max. load (Resistive) | 6 A |
| Power consumption | The CM907 requires a power supply of 230V AC or 24V AC, depending on the type of heating system it is controlling. The power consumption of the CM907 is approximately 2.2VA (0.01A) at 230V AC and 0.5VA (0.02A) at 24V AC. The power consumption of the CM907 may vary depending on the operating conditions, such as the ambient temperature, the programmed temperature, and the frequency of temperature changes. |
| Dimensions | 132mm x 94mm x 30mm (H x W x D) |
| Battery backup | The CM907 uses two AA alkaline batteries as the backup power source. The batteries are located behind a removable cover on the front of the thermostat. The batteries should be replaced every year to ensure reliable backup power. The CM907 will display a low battery warning on the screen when the battery level is low, indicating that it is time to replace the batteries. If the batteries are not replaced when they are low, the CM907 may lose its programmed settings during a power outage. To replace the batteries, remove the battery cover and insert two new AA alkaline batteries, making sure to observe the correct polarity. |
| Programmer Voltage | 230V AC |
| Smart compatibility | The CM907 does not have built-in smart features, such as Wi-Fi connectivity or voice control. However, it is possible to make the CM907 thermostat smart-compatible by adding an external smart thermostat controller. |
| Terminal capacity | For a typical heating system with a boiler and a pump, the CM907 has two 1A rated volt-free contacts for the heating and hot water circuits. For a heating system with a motorized valve, the CM907 has four terminals – two for the valve and two for the power supply. For a heating system with an external sensor or a remote control, the CM907 has two additional terminals for connecting to the sensor or control. The CM907 has a maximum load of 10A resistive (2.3kW) and 3A inductive (690W) per terminal. It is important to note that the terminal capacity of the CM907 should not be exceeded, as this can cause damage to the thermostat or the heating system. If you are not sure about the terminal capacity of your heating system, you should consult a qualified heating engineer or electrician before installing the CM907 thermostat. |