Honeywell Magicstat 1 Manual

Operating 
Manual
RTH6350/RTH6450 Series
Programmable Thermostat 
69-2415ES-03  

Read and save these instructions.
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® U.S. Registered Trademark. US Patent No. D542,677 and other patents pending Copyright © 2011 Honeywell International Inc. All rights reser ved.
Quick Reference Card
Grasp and pull to see basic operating instructions at a glance.
Battery Holder
Press down and pull to remove batteries.
Batteries should be replaced once a year...

RTH6350/RTH6450 Series
 1 69-2415ES—03
About your new thermostat
About your new thermostatThermostat features ...................................2Programming at a glance ..........................3Quick reference to controls .......................4Quick reference to display ........................5
Programming & Operation
Set time and day ........................................6Select fan setting (auto/on)  ......................7Select system setting (heat/cool)..............8Using program schedules...

Operating Manual
69-2415ES—03 2
About your new thermostat
Congratulations on the purchase of your new Honeywell thermostat. It has been 
designed to give you many years of reliable service and easy-to-use, push-button 
climate control.
Features
•	 Easy-to-follow	menu	programming.
•	 One-touch	 temp	control	 overrides	 program	schedule	 at	any	 time.
•	 Large,	 clear,	backlit	 display	 is	easy	 to	read	 —	even	 in	the	 dark.
•	 Displays	 both	room	 temperature	 and	temperature	 setting.
•	 Removable...

RTH6350/RTH6450 Series
 3 69-2415ES—03
This thermostat is ready to go!
Your new thermostat is pre-programmed and ready to go. All you have to do is set the 
time and day. Then check the settings below and change if needed:
1. Set time and day (required for proper operation) .........................See page 6
2. Select fan setting (Auto/On): Preset to Auto .................To change, see page 7
3. Select system setting (Heat/Cool): Preset to Heat ......To change, see page 8
4. Program schedules: Preset...

Operating Manual
69-2415ES—03 4
Quick reference to controls
M28401
Digital display (see page 5).Battery holder (see page 15).
Temperature buttons  Press to adjust temperature settings (see pages 11-13).
Hold button  Press to override programmed temperature control (see page 13).
Function buttons  Press to select the function displayed just above each button. (Functions change depending on the task.) 

RTH6350/RTH6450 Series
 5 69-2415ES—03
Quick reference to display screen
Set Clock/Day/
Schedule Auto
W
ake Wed
Fan SystemHeat On
Heat Heat
Setting
Inside
AM
75756:
30
Replace Battery
M28402
In Recovery
Current inside temperature
Current program periodWake/Leave/Return/Sleep (see pages 9-11)
Set clock/day/schedule Press to set time, day or program schedules (see pages 6 & 11)
Function buttons Press the button beneath each function to view or change settings (functions change depending on the task)
Low...

Operating Manual
69-2415ES—03 6M28404
Wed
Set  Day Set Schedule
Done
PM4
:
30
Set  Clock/Day/
Schedule Auto
Fan
System
Heat
M28403
Set the time and day
1.  Press the SET CLOCK/DAY/SCHEDULE\X 
button, then press s or t to set 
the clock time.
2. Press the SET DAY button, then 
press s or t to select the day of 
the week.
3. Press DONE to save & exit.
Note: If the SET CLOCK/DAY/SCHEDULE\X option is not displayed, press DONE or RUN SCHEDULE.
Note: If the display flashes Set Clock, the thermostat will follow...

RTH6350/RTH6450 Series
 7 69-2415ES—03
Select the fan setting
Press the FAN button to select Auto or On.
In	“Auto”	 mode	(the	most	 commonly	 used	
setting), the fan runs only when the heat-
ing	or	cooling	 system	is	on.	 If	set	 to	“On,”	
the fan runs continuously.M28405
Set  Clock/Day/
ScheduleAuto
Fan
System
Heat
M28406
Set  Clock/Day/
ScheduleOn
Fan
System
Heat 

Operating Manual
69-2415ES—03 8
Select the system setting
Press the SYSTEM button to select Heat, Cool 
or Off.
•	Heat: Thermostat controls only the heating system.
•	Cool: Thermostat controls only the cooling system.
•	Off: Heating and cooling systems are off.
•	Auto (RTH6450 only): Thermostat automatically selects heating or cooling depending on the indoor temperature. 
CAUTION : EQUIPMENT DAMAGE HAZARD. To prevent possible compressor damage, do not operate cooling system when outdoor temperature is...