Honeywell RTH5100 User manual

OPERATING INSTRUCTIONS
® U.S. Registered Trademark
© 2004 Honeywell International Inc.
All Rights Reserved • Patents Pending 69-1722
Operating Instructions
RTH5100B
Non-programmable Thermostat
The RTH5100B Thermostat provides electronic control of 24 Vac single
stage heating and cooling systems or 750 mV heating systems.
For assistance with your Honeywell product please visit
www.honeywell.com/yourhome or call Honeywell Customer Care
toll free at 1-800-468-1502.
Read and Save these Instructions

69-1722 2
Contents
Features........................................................................3
Get to Know Your Thermostat ......................................4
Thermostat...............................................................4
Display .....................................................................5
Operate Your Thermostat .............................................6
Set System Setting ..................................................6
Set Fan Setting ........................................................7
Change Temperature Setting...................................8
Replace Batteries .........................................................9
Review Battery Tips......................................................13
Built-in Compressor Protection.....................................14
Accessory/Replacement Parts......................................15
Troubleshooting Tips ....................................................16
Customer Assistance....................................................21
Limited One-Year Warranty ..........................................22

3 69-1722
Features
• Large, Clear, Backlit Display: Easy-to-see and
read—even in the dark.
• Precise Comfort Control: ±1ºF of your set
temperature.
• Simplified Operation: Soft-key controls.
Simultaneously displays both room temperature
and temperature setting.
• Easy Change Battery Holder.
• Built-in Compressor Protection: Minimum-off
timer protects compressor from restarting too
early after a shutdown.
Get To Know Your Thermostat

69-1722 4
Get To Know Your Thermostat
Thermostat
CoolOn
Setting
Cool
Inside
Fan
Auto Cool
System
DIGITAL DISPLAY
FAN BUTTON
SYSTEM BUTTON
TEMPERATURE
SETTING BUTTON
TEMPERATURE
SETTING BUTTON
BATTERY
HOLDER
BATTERY HOLDER LATCH
M22010
PRESS TO RELEASE
BATTERY HOLDER.
RAISES
TEMPERATURE
SETTING
TWO AAA
ALKALINE
BATTERIES
LOWERS
TEMPERATURE
SETTING
SELECTS HEAT, OFF OR COOL
SELECTS AUTO OR ON
PRESS

5 69-1722
Get to Know Your Thermostat (Cont)
Display
Replace Batt
H
eat
C
oo
l
On
On
S
ettin
g
CoolH
eat
In
s
i
de
F
an
O
n Aut
o
H
eat
Cool
Off
System
INSIDE
TEMPERAT
U
R
E
TEMPERATURE
SETTING
INDICATES
THERMOSTAT IS
"CALLING" FOR
HEAT OR COOL
CURRENT
SYSTEM SETTING
M22011
CURRENT
FAN SETTING
INDICATES BATTERIES ARE
L
O
W AND M
US
T BE REPLA
C
E
D

69-1722 6
Operate Your Thermostat
Set System Setting
Press the System button to select Heat, Off or Cool:
Heat—Thermostat controls the heating system.
Off—Both the heating and cooling systems are off.
Cool—Thermostat controls the cooling system.
CAUTION
Equipment Damage Hazard.
Air conditioning compressor damage possible.
Do not operate cooling system when outdoor temperature
is below 50 °F (10 °C).
Cool
On
Se
rvi
ce
N
eeded
F
an
A
u
t
o
Coo
l
M22012
PRESS THE
SYSTEM BUTTON
TO SELECT HEAT,
OFF OR COOL

7 69-1722
Operate Your Thermostat (Cont)
Set Fan Setting
Press the Fan button to select Auto or On:
Auto—Normal setting for most homes.The fan runs
only when the heating or cooling system is on.
On—The fan runs continuously. Use this setting for
improved air circulation or for more efficient air
cleaning.
C
ool
On
Se
rvi
ce
N
eeded
F
an
A
u
t
o
C
oo
l
M22013
PRESS THE
FAN BUTTON
TO SELECT
A
UTO OR ON

69-1722 8
Operate Your Thermostat (Cont)
Change Temperature Setting
Press the Up or Down button to select the desired
temperature setting.
The first press of the Up or Down button turns on
the backlight. The second press of the Up or Down
button changes the temperature setting.
Replace Batt
Se
rvi
ce
N
eeded
F
an
A
u
t
o
C
oo
l
System
PRESS THIS
BUTTON TO RAISE
THE TEMPERATURE
SETTING
TEMPERATURE
SETTING
M22014
TEMPERATURE SETTING RANGE:
HEAT: 40°TO 90°F (4.5°T0 32°C)
COOL: 50°TO 99°F (10° T0 37°C)
PRESS THIS
BUTTON TO LOWER
THE TEMPERATURE
SETTING

9 69-1722
Replace Batteries
1. When the Replace Battery indicator is flashing,
replace batteries promptly with two fresh
AAA alkaline batteries.
The thermostat does not lose any settings
when the batteries are replaced; all settings
are permanently stored in memory.
Re
p
lace Bat
t
S
ervice Neede
d
F
an
A
u
t
o
Cool
System
REPLACE BATTERY INDICATOR
M22015

69-1722 10
Replace Batteries (Cont)
2. Press the battery holder latch to release the battery
holder.
3. Remove the battery holder from the thermostat.
S
ervice Neede
d
F
an
A
u
t
o
Cool
BATTERY HOLDER
LATCH
BATTERY HOLDER
M22016