Honeywell Thermostat CM921- Manuals

STEP 2: Setting the Date and Time To set the Date and Time: a. Move the slider switch to the DATE position. ‘SET THE DAY’ will be displayed on the screen and the day digits will be lashing. b. Use the or buttons to set the correct day. When either of these buttons are pressed ‘DAY OK?’ will be displ...

pRoGRAMMING THE CM921 The Built-in Heating Program The built-in heating program has 6 temperature level changes that can be set between 3.00am and 2.50am - 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 i...

pRoGRAMMING THE CM921 Disabling / Enabling Time Periods The thermostat has 6 periods that can be programmed, but you may not need all of these switch points for your heating requirements. Therefore, any period from 2 to 6 can be disabled or enabled as follows: To disable time periods: Go to the desi...

9 opERATING THE CM921 • Temperature Override During normal operation ( AUTO mode) the programmed temperature can be adjusted manually by pressing the or buttons. The ‘target‘ temperature will be displayed and lash for 5 seconds – during this time the or buttons can be used to modify the set value. N...

10 fINE TuNING THE CM921 Changing the User Parameters The user mode allows you to modify some basic settings of the thermostat to meet your personal preferences. You can change the time display format (24hr or AM/PM), reset the heating program to the built-in settings and disable or enable the summe...

12 Symptom Possible Cause Remedy The thermostat has a blank LCD screen. Batteries not installed. Check to see if there are batteries in the battery compartment and the paper tab has been removed. Incorrect battery orientation. Check that the batteries have been installed in the correctorientation. E...