Honeywell RTH5100B User Manual
Operating Instructions
RTH5100B
Non-programmable Thermostat
OPERATING INSTRUCTIONS
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
toll free at 1-800-468-1502.
or call Honeywell Customer Care
Read and Save these Instructions
® U.S. Registered Trademark
© 2004 Honeywell International Inc.
All Rights Reserved • Patents Pending
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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
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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
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Thermostat
Get To Know Your Thermostat
DIGITAL DISPLAY
Inside
Cool
Setting
Fan
Cool
System
Auto
FAN BUTTON
SELECTS AUTO OR ON
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On
Cool
SYSTEM BUTTON
SELECTS HEAT, OFF OR COOL
BATTERY HOLDER LATCH
PRESS TO RELEASE
BATTERY HOLDER.
PRESS
BATTERY
HOLDER
TWO AAA
ALKALINE
BATTERIES
TEMPERATURE
SETTING BUTTON
RAISES
TEMPERATURE
SETTING
TEMPERATURE
SETTING BUTTON
LOWERS
TEMPERATURE
SETTING
M22010
Get to Know Your Thermostat (Cont)
Replace Batt
eat
Cool
S
g
eat
de
an
O
o
eat
System
E
O
D
Display
INSIDE
TEMPERATUR
Insi
F
n Aut
INDICATES BATTERIES ARE
L
W AND MUST BE REPLACE
CoolH
ettin
On
H
On
H
Cool
Off
CURRENT
FAN SETTING
CURRENT
SYSTEM SETTING
5 69-1722
TEMPERATURE
SETTING
INDICATES
THERMOSTAT IS
"CALLING" FOR
HEAT OR COOL
M22011
Operate Your Thermostat
Cool
On
Se
eeded
an
o
Coo
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).
rvice N
F
l
Aut
PRESS THE
SYSTEM BUTTON
TO SELECT HEAT,
OFF OR COOL
M22012
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Operate Your Thermostat (Cont)
C
On
Se
eeded
an
o
Cool
A
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.
rvice N
ool
F
Aut
PRESS THE
FAN BUTTON
TO SELECT
UTO OR ON
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7 69-1722
Operate Your Thermostat (Cont)
Replace Batt
Se
eeded
an
o
Cool
System
Change Temperature Setting
Press the Up or Down button to select the desired
temperature setting.
TEMPERATURE
SETTING
PRESS THIS
BUTTON TO RAISE
THE TEMPERATURE
rvice N
F
Aut
TEMPERATURE SETTING RANGE:
HEAT: 40°TO 90°F (4.5°T0 32°C)
COOL: 50°TO 99°F (10° T0 37°C)
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.
SETTING
PRESS THIS
BUTTON TO LOWER
THE TEMPERATURE
SETTING
M22014
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