Honeywell thermostat CM721 1 Day Wireless Programmable Thermostat User Manual

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PROGRAMMING THE CM727 ‘Efficient Daily Use’
f. i)	Press	 the	COPY DAY	button	 to	copy	 Monday’s	 program	into	Tuesday.	 The	display	 will	go	blank	apart	 from	the	‘non	 flashing’	 day	indicator,	 which	indicates	 the	day	 copied	 and	the	‘flashing’	 target	day	to	copy	 the	program	 to.	To	accept	 this	day	 press	 the	green		button.	 To	select	 a	different	target	 day	press	 the	DATE/DAY	button	 until	the	‘flashing’	 day	indicator	 is	under	 the	required	day,	 then	 accept	 it	by	 pressing	 the	green...

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During Normal Operation
•	Temperature Enquiry
	 In	AUTO,	MAN and	OFF operating	 modes	the	thermostat	 will	display	 the	current	 room	temperature.	 To	review	 the	programmed	‘target’	temperature	 (the	temperature	 which	the	thermostat	 is	trying	 to	maintain)	 press	the		button.	 This	‘target’	 temperature	 value	will	be	displayed	flashing	for	5	seconds	before	returning	to	the	current	room	temperature	value.	
•	Temperature Override
	 During	 normal	operation	 (AUTO	mode)	 the	programmed	 temperature...

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Using the Special Features
•	SERVICE indicator (optional)
 Note: This option only works if activated by your installer.
 The  'SERVICE'  indicator  is  displayed  at  set intervals  as  a  reminder  that  your  heating  system 
requires a routine check. Please call your installer 
to arrange a maintenance visit.
 The ‘SERVICE’ indicator will remain on the display of the CM727 until it is either reset or disabled by 
your installer. The CM727 and heating system will 
continue to operate as...

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How do I change the batteries on the thermostat when they run out?
The	thermostat	 constantly	monitors	the	battery	power	 level,	which	 typically	 lasts	for	about	 2	years	before	 needing	 replaced.	 When	the	power	is	running	 low	a	flashing		symbol	 will	be	displayed	 on	the	 screen.	 To	change	 the	batteries	follow	 the	steps	 in	the	 above	 section	 (‘STEP  1: 
Installing  the  Batteries’	 on	 page	 3),	replacing	the	 used	 batteries	 with	new	 ones	 in	Step	 c.	Note:	 While	 changing	 the...

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Symptom
Blank	Display	(Power	Loss).
Display	shows	flashing	 symbol.
Display	shows		symbol.
Display	shows	the	word	'SERVICE'
BDR91	red	LED	is	constantly	on	or	flashing
Remedy
Check	batteries	are	installed	by	removing	the	battery	cover.
Check	batteries	have	been	installed	in	the	correct	orientation.
Replace	the	batteries.
The	batteries	in	the	thermostat	are	low	on	power	-	Replace	the	batteries.
A	fault	has	occurred	in	your	heating	system.	Remove	and	re-insert	the	batteries.
If	the		symbol	does...

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50039991-003	A©	2009	Honeywell	International	Inc.
Honeywell Control Systems Ltd.Arlington Business Park,
Bracknell
Berkshire
RG12 1EB
Technical Help Desk: 08457 678999
www.honeywelluk.com
WHAT IS A PROGRAMMABLE ROOM THERMOSTAT?
...an explanation for householdersA  programmable  room  thermostat  is  both  a  programmer  and  a  room 
thermostat. A programmer allows you to set ‘On’ and  ‘Off’ time periods to suit 
your own lifestyle. A room thermostat works by sensing the air temperature, 
switching on...