Honeywell CM721 User Guide

About Honeywell CM721 User Guide

Honeywell CM721 Description

The Honeywell CM721 is a programmable room thermostat designed to control your heating system efficiently, providing comfortable temperatures when you are at home and energy savings when you are away. The following instructions explain how to program and use the thermostat to provide the most home comfort at the least cost.

Honeywell CM721 Features

  1. Ergonomic user interface featuring an ‘OK-button’.
  2. Large LCD (Liquid Crystal Display) Screen.
  3. 4 independent temperature levels (from 5°C to 35°C).
  4. Automatic Summer/Winter Time Change.
  5. Optimum Start to achieve the right temperature at the right time.
  6. Built-in Memory holds the user program indefinitely.

Honeywell CM721 Control Layout

Honeywell CM721 Control Layout

  1. LCD Screen
  2. Battery Low Indicator
  3. Time Display
  4. Burner On Indicator
  5. Temperature Display
  6. Temperature Change Buttons
  7. Temperature Enquiry Button
  8. Operating Mode Buttons
  9. Green OK Button
  10. Battery Compartment
  11. Battery Cover
  12. Program Buttons
  13. Time Change Buttons
  14. Set Date Button

Honeywell CM721 SETTING-UP

STEP 1: Installing the Batteries

Note: Please follow the instructions in this section only if the thermostat screen is blank (no symbols or digits are displayed). If the room temperature is already displayed move on to Step 2: Setting the Date and Time.

To install the Batteries:

  1. Lift up the front cover of the thermostat to reveal the battery cover and product controls.
  2. Remove the battery cover by pressing down and sliding out.
  3. Insert the 2 x AA LR6 Alkaline Batteries supplied with the thermostat, ensuring the correct orientation (see ‘Controls Layout’ on page 2).
  4. After a short pause the thermostat will display information on the screen and is now ready for use.
  5. Replace the battery cover by sliding it firmly back into the front of the thermostat.

STEP 2: Setting the Date and Time

To set the Date and Time:

  1. Press the DATE button to begin setting the date. When you set the date for the first time after the batteries are inserted, the display will show: Press the or buttons to set the current day of the month (e.g. d 01 = 1st day of the month) then press the green OK button to confirm.
  2. Press the+ or - buttons to set the current month of the year (e.g. m 01 = January) then press the green OK button to confirm.
  3. Press the + or - buttons to set the current year (e.g. yr 06 = 2006) then press the green OK button to confirm. The date is now stored.
  4. Use the + or - buttons to set the correct time then press the green button to confirm. Each press of the OK buttons will change the time by one minute and holding them down will change the time slowly at first and get progressively quicker.

Note: If this mode is entered accidentally then press the AUTO, MAN or OFF buttons to exit.

STEP 3: Running the Built-in Heating Program

The thermostat is now ready for operation. Press the AUTO button and the built-in heating program will start running. Note: The built-in heating program has been designed to provide normal comfort requirements, but if you want to customise the settings please see the next section ‘Programming the CM721’.


The Built-in Heating Program

The built-in heating program has 4 temperature level changes that can be set between 3.00am and 2.50am the following day - allowing you to maintain the evening temperature after midnight. Each temperature level can be set between 5°C and 35°C, and adjusted in 0.5°C increments. The factory default program for heating is as follows.
















Reviewing the Heating Program

To review or edit the heating program use the PROGRAM < or > buttons to navigate between the 4 individual programming periods.

Readmore and Download Honeywell CM721 User Guide

Title : Honeywell CM721 User Guide
Format : PDF
Pages : 16 Pages
Language : English
File Size : 3 MB
Honeywell CM721 User Guide

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