CM927 Wireless programmable thermostat product specification sheet
The CM927 is a wireless programmable thermostat designed for heating and cooling control in homes and apartments. It features a large LCD with dynamic text, 7‑day programming, party and holiday modes, and frost protection. The unit communicates via the 868 MHz RF band and can be paired with relay boxes to control up to four zones.
The manual covers the control layout, installer set‑up procedures, wiring guidelines for the R6660D relay box, and detailed technical specifications such as power supply, RF parameters, battery type, and operating temperature ranges. Ordering information for spare parts and system packs is also provided.
| RF operation band | 868.0‑868.6 MHz |
|---|---|
| RF duty cycle | 1 % duty cycle |
| Relay rating | 24‑230 V AC, 10 A resistive, 3 A inductive |
| Battery type | 2 × 1.5 V AA alkaline cells |
| Battery life | Minimum 2 years |
| Operating temperature range | -20 °C to 55 °C |
| Humidity range | 10 % to 90 % RH, non‑condensing |
| Temperature display range | 0 °C to 50 °C |
Move the slider switch to OFF, then press and hold the INFO button and the two program buttons together; the unit will display the first installer parameter.
The thermostat operates in the ISM band at 868.0‑868.6 MHz with a 1 % duty cycle.
Set parameter 3:TC (category 1) to 1 in the installer set‑up mode.
It uses two AA alkaline cells (1.5 V each) and the battery life is at least two years.