Honeywell CM927 User Manual

CM927 - User Guide
7 day Wireless Programmable Room Thermostat
with LoT Technology
Honeywell Control Systems Ltd.
Arlington Business Park,
Bracknell
Berkshire
RG12 1EB
Technical Help Desk: 08457 678999
www.honeywelluk.com
42011077-703 R1
© 2006 Honeywell International Inc.
Description
The Honeywell CM927 is a ‘wireless’ programmable room thermostat designed to
control you heating system efficiently, providing comfortable temperatures when you
are at home and energy savings when you are away. With ‘wireless’ communication
there is no need to provide a wired connection between the thermostat and boiler.
The following instructions explain how to set up, program and operate your
Honeywell CM927 Programmable Room Thermostat.
Features
Wireless connection to the boiler allows you to mount the Chronotherm in your
room without decor disruption
Armchair programming feature lets you program your Chronotherm while
resting comfortably in your armchair
Ergonomic User Interface features an ‘OK-button’ making the CM927 very
easy to use so you always stay in control.
LoT Technology provides informative ‘on-screen’ feedback and operational
assistance to the user.
Extra Large LCD (Liquid Crystal Display) Screen with Backlight provides
added user friendliness and clearer viewing – even in the dark.
7-day heating program lets you set the CM927 independently for each day of
the week to match your lifestyle, whilst maximizing energy savings.
6 independent temperature levels per day lets you set any 6 temperatures you
require (from 5 to 35°C) so you can enjoy economical comfort every day
Holiday button saves energy by letting you reduce the temperature for 1 to 99
days while you are away from home, resuming normal operation on your return.
Party button lets you temporarily maintain (or adjust) the current temperature for 1
- 23 hours. Useful when you have guests or leave the house for a short period.
Day Off button copies Sunday’s program into any other day of the week, so that
you can make the CM927 follow this program if you have a day or days off.
Automatic Summer/Winter Time Change will adjust the clock automatically for
‘Daylight Saving Time’.
Built-in Memory holds the user program indefinitely so that it is never lost –
even if you remove the batteries.
Optimum Start option is an advanced feature which ensures that the optimum
temperature conditions are achieved at the required times (option set by your
installer).

Honeywell CM927 Specifications

General

Display	LCD
Programming	7-day programmable
Power Supply	2 x AA batteries
Communication	Wireless
Mounting	Wall-mounted
Temperature Range	5°C to 35°C
Accuracy	±0.5°C
Battery Backup	Yes
Type	Programmable Thermostat
Voltage	3V
Programs	6 time periods per day
Wireless Range	30m
Compatibility	Compatible with most heating systems

Summary

Getting Started with the CM927

Installing the Batteries

Instructions for installing the batteries in the thermostat to power the device.

Setting the Date and Time

Guide on how to correctly set the current date and time on the thermostat.

Running the Built-In Heating Program

Information on activating the thermostat's default heating program.

Programming the CM927

The Built-in Heating Program

Details of the factory default 7-day heating program with 6 temperature changes per day.

Modifying the Heating Program

Step-by-step guide to change time and temperature settings for each period.

Disabling / Enabling Time Periods

Instructions on how to disable or re-enable specific time periods in the heating program.

Operating the CM927

Choosing the Operating Mode

Explanation of the three operating modes: Automatic, Manual, and Off.

Temperature Override

How to temporarily adjust the target temperature manually in AUTO mode.

Holiday Function

Setting a constant reduced temperature for a specified number of days while away.

Party Function

Temporarily maintaining or adjusting the temperature for a set duration.

Day Off Function

Temporarily running Sunday's heating program for a specific number of days.

Fine Tuning the CM927

Changing the User Parameters

Modifying basic settings like time format, resetting programs, and enabling/disabling time change.

FAQ's & Troubleshooting

Troubleshooting Guide

A guide to diagnose and resolve common issues with the thermostat's operation and display.