Honeywell RTH5100B User manual
INSTALLATION INSTRUCTIONS
® U.S. Registered Trademark
© 2004 Honeywell International Inc.
All Rights Reserved • Patents Pending
69-1716
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
START HERE
69-1716 2
Contents
Prepare for Installation..................................................3
Follow Important Instructions........................................5
Remove Old Thermostat...............................................6
Follow Special Instructions ...........................................7
Label Old Thermostat Wires.........................................10
Mount New Wallplate to Wall ........................................11
Connect Wires to New Wallplate ..................................15
Install Batteries .............................................................20
Attach New Thermostat to Wallplate.............................21
Configure Installer Setup ..............................................22
Customer Assistance....................................................28
Limited One-Year Warranty ..........................................29
3 69-1716
Step 1. Prepare for Installation
1. Check that the following items are included:
If any of the items shown above are missing, call
Honeywell Customer Care at 1-800-468-1502
before returning the thermostat to the store.
CoolOn
Setting
Cool
Inside
Fan
A uto Cool
System
PRESS
OPE
RA
TI
N
G
I
N
ST
RUC
TIO
N
S
I
N
ST
A A
TIO
N
C
A
U
TI
O
N
l
es
l
es
ww
w
X2
Y
WALLPLATE
THERMOSTAT
M22033
MOUNTING SCREWS (2)
AND WALL ANCHORS (2)
OPERATING INSTRUCTIONS
INSTALLATION INSTRUCTIONS
CAUTION CARD
WIRE LABELS
69-1716 4
Step 1. Prepare for Installation (Cont)
2. Check that you have everything required for
the installation:
• Two AAA alkaline batteries
• No. 2 Phillips screwdriver and standard pocket
screwdriver
• Drill
• Drill bit— use 3/16 in. for drywall; use 7/32 in.
for plaster
• Level (optional)
• Hammer
• Pencil
• Electrical tape
5 69-1716
Step 2. Follow Important Instructions
1. Do not connect the wires to the new thermostat
based on wire color because damage can occur to
the heating and/or cooling system.
These Installation Instructions explain later how to
use the enclosed wire labels to correctly mark the
wires connected to your old thermostat.
Step 3. Remove Old Thermostat
M22034
Y
G
RC
R
W
OLD THERMOSTAT
RED
WHITE
YELLOW
ORANGE
GREEN
DO NOT WIRE
NEW THERMOSTAT
BASED ON
WIRE COLOR.
!
69-1716 6
Step 3. Remove Old Thermostat
1. Turn off power at the heating and/or cooling system
or fuse/circuit breaker panel.
2. Remove the cover from the old thermostat.
3. Remove the old thermostat from the wall or
wallplate. Do not remove the wires.
MERCURY NOTICE
If you are replacing a thermostat that contains mercury in a
sealed tube, do not place your old thermostat in the trash.
Contact your local waste management authority for instructions
regarding recycling and the proper disposal of an old thermostat
containing mercury in a sealed tube.
Y
G
C
R
W
OL
D
T
H
E
R
M
OST
A
T
.18
.2
.25 .3
.9
.7
.5
.4
L
O
N
G
E
R
THERMOSTAT
COVER
WALLPLATE
M22036
7 69-1716
Step 4. Follow Special Instructions
1. If you have C and/or C1 wire(s) connected to your
old thermostat, do not connect them to your new
thermostat.
2. Disconnect the C and/or C1 wire(s). Make sure
they do not touch each other or any other wires.
3. Wrap the bare end of each C and/or C1 wire(s)
with electrical tape.
Y
G
C
R
W
OL
D
T
H
E
R
M
OST
A
T
WIRE HOLE
M22037
DO NOT CONNECT TO NEW THERMOSTAT
WIRE
SCREW
TERMINAL
LETTER
DESIGNATION
69-1716 8
Step 4. Follow Special Instructions (Cont)
4. Most installations have two to five wires connected
to the old thermostat. If six or more wires are
connected to your old thermostat (not counting
the C or C1 wires), do not continue the installation.
You may have purchased the wrong thermostat.
Visit www.honeywell.com/yourhome or call
Honeywell Customer Care at 1-800-468-1502
before returning the thermostat to the store.
Y1
G
W2
Y2
R
W1
OL
D
T
H
E
R
M
OST
A
T
WIRE HOLE
M22038
SIX WIRES CONNECTED
WIRE
SCREW
TERMINAL
LETTER
DESIGNATION
9 69-1716
Step 4. Follow Special Instructions (Cont)
5. If you find any wires not connected to your old
thermostat, do not connect them to your new
thermostat.
6. Wrap the end of the wires that are not connected
with electrical tape.
Step 5. Label and Disconnect Wires from Old
Thermostat
Y
G
RC
R
OL
D
T
H
E
R
M
OST
A
T
WIRE HOLE
WIRES NOT CONNECTED –
DO NOT CONNECT TO
NEW THERMOSTAT M22040
WIRE
SCREW TERMINAL
LETTER DESIGNATION
W
69-1716 10
Step 5. Label Old Thermostat Wires
1. As you disconnect each wire, use the enclosed wire
labels to wrap a wire label around each wire that
matches the letter designation. Do not allow the
wires to fall into the wall opening after the wires
are disconnected.
2. Remove any remaining parts of the old thermostat
from the wall.
When connecting the wires to the new
thermostat, refer to the wire labels. Do not
connect wires to your new thermostat based
on the color of the wire.
Y
G
RC
R
OL
D
T
H
E
R
M
OST
A
T
WIRE HOLE
M22039
WIRE
SCREW
TERMINAL
LETTER
DESIGNATION
WIRE LABEL
W
W
G
Y
R
RC
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