Honeywell CM707 Programmable Thermostat
Product Specification and Installation Guide
Note: This is a legacy product supported by Resideo and is no longer manufactured.
Product Overview
The Honeywell CM707 thermostat is designed to provide automatic time and temperature control for heating systems in residential properties. It is compatible with various heating sources including combi-boilers, oil-burners, gas-fired boilers, circulation pumps, thermal actuators, zone valves, and electric heat systems (up to 5A). The thermostat features a large LCD display, an intuitive button layout, and an 'OK' button for user-friendly operation. Its design prioritizes ease of installation with a moulded back-plate, trunking guides, and wiring breakouts. The CM707 is ideal for consumers seeking reliable, precise temperature control from a modern, easy-to-program device.
Key Features
- Attractive, slim, modern styling suitable for any home.
- 7-day heating program capability.
- Up to 4 daily independent time and temperature level changes for personalized scheduling.
- Temporary programmed temperature override function.
- Holiday button for energy savings, allowing temperature reduction for 1 to 99 days.
- Room temperature enquiry function.
- EEPROM memory for indefinite user program retention.
- OFF mode with integral frost protection setting (minimum 5°C, installer adjustable).
- 24-230V 5A resistive, 2A inductive SPDT relay for broad compatibility with domestic central heating systems.
- Battery powered by 2 x AA (LR6) alkaline cells.
- Minimum battery life of 2 years with a low battery warning indicator.
- Built-in default heating program.
- Surface or wall box mounting options with integrated trunking guides and wiring breakouts.
- Simplified installation with no installer links or special switches required for most systems.
- User Set-Up Mode for user-configurable functions like AM/PM or 24hr time display and resetting heating profiles.
- Installer Set-Up Mode for advanced configuration, including Pump Exercise, Set point Limits, Temperature Offset, Minimum ON time, Cycle rate, Proportional Band Width, and Diagnostic Mode.
Controls and Display Layout
The CM707 features a clear LCD screen displaying key information. The product layout includes:
- 1. LCD Screen
- 2. Battery Low Indicator ?
- 3. Time Display
- 4. Burner On Indicator ?
- 5. Day Indicator
- 6. Temperature Display
- 7. Temperature Change Buttons (Up/Down) ▲▼
- 8. Information Enquiry Button ℹ️
- 9. Operating Mode Buttons (AUTO, MAN, OFF)
- 10. Green OK Button ✔️
- 11. Battery Compartment
- 12. Battery Cover
- 13. Holiday Function Button ?️
- 14. Program Buttons (e.g., 1..4, >)
- 15. Copy Day Button ?
- 16. Day Select Button
- 17. Time Change Buttons
Specifications
| Parameter | Value |
|---|---|
| Batteries | 2 x 1.5 V IEC LR6 (AA) Alkaline cells |
| Battery life | Minimum 2 years |
| Battery replacement | Program retained in EEPROM |
| Switch type | SPDT (potential free) |
| Electrical rating | 230 V~, 50-60 Hz, 0.1 A to 5 A resistive; 0.1 A to 2 A inductive (0.6 pf) 24 V~, 50-60 Hz, 0.5 A to 5 A resistive; 0.5 A to 2 A inductive (0.6 pf) |
| Time display | 24 hour or 12 hour AM/PM format |
| Time keeping accuracy | Typically better than 10 minutes per year |
| Program | 7 day with 4 daily time and temperature level changes |
| Time setting resolution | Time of day: 1 minute; Program: 10 minute steps |
| Sensing element | 100K (@ 25°C) NTC thermistor |
| Temperature setting range | Program: 5 to 35°C in 0.5°C steps Frost: 5°C or equal to lower limit (5°C to 21°C) |
| Temperature control accuracy | ±0.5 K (nominal) @ 20°C, 50% load; 3 K/hour |
| Room Temperature display range | 0°C to 50°C |
| Control form | P + I (Proportional + Integral) |
| Minimum ON time | 10% of cycle time (min 1 minute), adjustable to 2 to 5 min |
| Cycle rate | Selectable by application (see installer set up) |
| Wiring | Terminal block capable of accepting wires up to 2.5 mm² |
| Wire access | Mains wiring – rear right; Low voltage wiring – rear right |
| Dimensions | 133 x 88.5 x 26 mm (w x h x d) 133 x 175 x 26 mm (w x h x d) (flap open) |
| Environmental | Operating temperature range: 0 to 40°C Shipping/storage temperature range: -20 to 55°C Humidity range: 10 to 90% rh, non-condensing |
| Approvals | Designed to meet European EN approvals EN60730-1 (Nov 2000), EN55014-1 (1997), EN55014-2 (2000) |
Installer Set-Up
The installer can configure various parameters to optimize the thermostat's performance for specific heating systems and user needs. Accessing installer set-up mode involves pressing the OFF button, then holding the INFO button and the two program buttons ('<' and '>') simultaneously.
Specific Applications Configuration:
| Application | Cycle/Hour Setting | Minimum ON Time (minutes) | Notes / Required Changes |
|---|---|---|---|
| Heating - Gas Boilers (<30KW) | 6 | 1 | No action required |
| Oil Boiler | 3 | 4 | Set Minimum ON Time to 4 minutes; Set Cycle/Hour to 3. |
| Thermal Actuator | 12 | 1 | Set Cycle/Hour to 12. |
| Zone valve | 6 | 1 | No action required. |
| Electric heating (<5A) | 12 | 1 | Set Cycle/Hour to 12. |
Special Features Configuration:
| Feature | Description | Installer Set-Up Parameter |
|---|---|---|
| AM-PM/24hr Display | Change display format (default 24hr). | Set parameter n.1, category 1 to 12 for AM/PM. |
| Pump Exercise | Switches the relay on for 1 minute at 12:00 if not activated since the previous day. Operates during Holiday mode if enabled. | Set parameter n.5, category 2 to 1. |
| Upper Temperature Limit | Adjustable from default 35°C down to 21°C for energy saving, useful for rental properties. | Set parameter n.6, category 1 to the desired limit (21-34°C). |
| Lower Temperature Limit | Adjustable from default 5°C up to 21°C for comfort, especially for elderly, children, or disabled. | Set parameter n.7, category 1 to the desired limit (6-21°C). |
| Temperature Offset | Allows adjustment of the displayed temperature by +/- 3°C to match other appliance readings or compensate for location. | Set parameter n.12, category 1 to the desired offset value (-3 to +3°C). |
| Proportional Band Width | Adjustable from default 1.5°C up to 3°C for improved temperature control and reduced overshoot, suitable for well-insulated homes or air systems. | Set parameter n.13, category 1 to the desired value (1.6-3.0°C). |
Parameter Details (Installer Set-Up)
The following tables detail the parameters available in the installer set-up mode:
Category 1: Thermostat Parameters
| Parameter | Installer Set-Up Number / Abbreviation | Factory Setting | Optional Setting | Installer Set-Up Category |
|---|---|---|---|---|
| AM-PM/24hr Display | 1:CI | 24 hr clock display | 12 hr AM/PM clock display | 1 |
| RESET Time / Temperature Program | 2:rP | Time / Temperature profile set to factory default (1) | Time / Temperature are as programmed; Changes to 0 when one of the time/temp profiles are changed. To restore the factory profile set to 1. | 1 |
| Upper Temperature Limit | 6:uL | 35°C Upper Temp. Limit | 21 to 34°C adjustment in 1°C steps | 1 |
| Lower Temperature Limit | 7:LL | 5°C Lower Temp. Limit | 6 to 21°C adjustment in 1°C steps | 1 |
| Temperature Offset | 12:tO | No offset | -3 to +3°C adjustment in 0.1°C steps | 1 |
| Proportional Band Width | 13:Pb | 1.5°C Proportional Band | 1.6 to 3.0°C adjustment in 0.1°C steps | 1 |
| Reset Parameters to Factory Defaults | 19:FS | All settings held are the factory defaults. Changes to 0 when one of the parameter values are changed. | Settings are as modified above. To restore the factory profile set to 1. | 1 |
Category 2: System Parameters
| Parameter | Installer Set-Up Number / Abbreviation | Factory Setting | Optional Setting | Installer Set-Up Category |
|---|---|---|---|---|
| Minimum ON Time | 1:Ot | 1 minute minimum ON time | 2 to 5 minutes (2, 3, 4, or 5 min) | 2 |
| Cycle Rate | 2:Cr | 6 cycles per hour (cph) for gas boilers, zone valves and fan-coil | 3, 9, 12 cph (3-3 cph, 9-9 cph, 12-12 cph) | 2 |
| Pump Exercise | 5:PE | Pump Exercise Disabled | Pump Exercise Enabled | 2 |
Dimensions and Installation
Dimensions
The thermostat measures approximately 133 mm (width) x 88.5 mm (height) x 26 mm (depth). When the battery compartment flap is open, the height increases to approximately 175 mm.
[Diagram description: Three views of the thermostat are shown: front view showing the screen and buttons, side view showing depth, and a rear view showing the backplate with wiring terminals and battery compartment.]
Installation Location
The CM707 thermostat should be located in a position with good air circulation, at an average room temperature, and on an inside wall, approximately 1.5 metres above the floor. Avoid placing it near heat sources (radiators, hot air vents, TVs, lights), doors, windows, or in direct sunlight.
Mounting
The CM707 can be mounted directly onto a wall surface or into an electrical wall box.
Wiring
The CM707 is designed for fixed wiring and must be installed according to the latest I.E.E. regulations. Wiring connections must use a fuse rated at no more than 5 amps and a Class "A" switch with contact separation of at least 3 mm in all poles.
Important Notes for Installers:
- Installation should only be performed by a trained service engineer.
- Always disconnect the power supply before commencing installation.
Wiring Diagrams
The document includes several wiring diagrams illustrating connections for different heating system configurations. These diagrams show connections between the CM707 thermostat, a CM700 unit (likely a receiver or interface), and various heating system components like boilers, pumps, and zone valves. The diagrams typically show mains power input (24-230V), connections to the thermostat's terminals (e.g., L, N, A, B, C), and outputs to controlled devices.
[Diagram description: Example wiring shows a 24-230V supply connected to a CM700, which then connects to the CM707. Another diagram shows a CM707 connected to a CM700, which controls a pump and a boiler via specific terminals.]
Ordering Specification
| Description | Model | Logo | Literature | Availability | Spec Sheet |
|---|---|---|---|---|---|
| 7-day programmable thermostat | CMT707A1003 | Honeywell | French, Dutch, Italian, Spanish, German, Portuguese. | Aug 05 | ENOH8544 |
| 7-day programmable thermostat | CMT707A1011 | Honeywell | Czech, Polish, Slovakian, Hungarian, Romanian, Russian. | Aug 05 | ENOH8544 |
| 7-day programmable thermostat | CMT707A1037 | Honeywell | English, Greek, Turkish, Croatian, Slovenian. | Nov 06 | ENOH8544 |
