Honeywell RTH8500 Series User manual

RTH8500 Series
Touchscreen Programmable Thermostat
69-2219EF-03
Quick Installation Guide

69-2219EF—03 ii
Installation is Easy
Label wires and remove your old thermostat
Install and wire your new thermostat
Set your new thermostat to match your heating/cooling
system
– This thermostat works with virtually all System
Types
– It is preset for the most common system
We are here to help.
Call 1-800-468-1502 for wiring
assistance before returning the
thermostat to the store.

1 69-2219EF—03
1Turn Off Power to Heating/
Cooling System
M28097

69-2219EF—03 2
Remove old thermostat but leave wallplate with
wires attached.
2Remove Old Thermostat
M28099
Is there a sealed tube containing
mercury? If so, see back cover
for proper disposal instructions.
Leave wallplate
in place
Old thermostat
Cover

3 69-2219EF—03
Label the wires using the supplied wire labels as you
disconnect them.
3Label Wires with Tags
Wire Labels
M28100
M28093

69-2219EF—03 4
Remove wallplate from the new thermostat and mount
onto wall.
+
++
M28334
4Separate Wallplate from
New Thermostat
Wallplate

5 69-2219EF—03
Mount the new wallplate using the included screws
and anchors.
5Mount Wallplate
Drill 3/16-in. holes for drywall
Drill 3/32-in. holes for plaster
M27514

69-2219EF—03 6
Simply match wire labels.
Remove metal jumper if you have both Rand Rc wires.
6Connect Wires
Labels don’t match? See page 21.
Have a Heat Pump system? See pages 22–23.
We are here to help.
Call 1-800-468-1502 for wiring assistance.
M27515
RC
R
W
Y
G
C
Y2
W2
LABELED WIRES
SCREW
CONVENTIONAL
INSERT WIRES
THEN TIGHTEN SCREWS
WIRE HOLE
R
W
CONVENTIONAL
G
Y

7 69-2219EF—03
Install three AAA alkaline batteries and remove tab.
M28335
Back of thermostat
Remove tab.
M28336
7Install Batteries

69-2219EF—03 8
Install thermostat onto the wallplate on the wall.
M28337
8Install Thermostat onto Wallplate

9 69-2219EF—03
Turn the power back on to the heating/cooling system.
9Turn Power Back On
M28098

69-2219EF— 03 10
DONE
TUE
6
PM
1:00
M28339
10 Set Time and Date
Press s/t
to set date
Press s/t
to set month
Press s/t
to set year
Press DONE to save changes
DONE
TUE
15
6
2006
M28338
Press s/t
to set time
Press DONE to save and exit

11 69-2219EF—03
If your system type is:
q Single Stage Heat and Cool
Congratulations, you’re done!
If your system type is:
q Multistage Heat and Cool
q Heat Pump* without Backup Heat
q Heat Pump* with Backup Heat
q Heat Only
q Cool Only
Continue with advanced installation
on next page to match your thermostat to your sys-
tem type.
*Heat Pump—an air conditioner that provides cooling
in the summer, and also runs in reverse in the winter to
provide heating.
If you are not sure of your system type or if you have
other questions, call us toll-free at 1-800-468-1502.
This thermostat works on 24 volt or 750 mV systems. It
will NOT work on 120/240 Volt systems.
11 If your system type is...

Advanced Installation
System setup......................................................................................13
Wiring .................................................................................................21
Troubleshooting ..................................................................................24
Customer assistance..........................................................................26
Limited warranty ................................................................................27

RTH8500
13 69-2219EF—03
About your new thermostat
SETUP WIRING ASSISTANCE TROUBLESHOOTING
System setup
2. Press and hold blank center key until the
screen changes (approximately 5 seconds).
1. Press SYSTEM.
SCHED HOLD
SCREEN MORE
TUE
AM
Following
Schedule
Inside
Outside
Set To
70
6:01
70
43
FAN
AUTO
SYSTEM
HEAT
M28340
DONE CANCEL
TUE
AM
Inside Set To
70
6:01
70
FAN
AUTO
SYSTEM
HEAT
M28341

Advanced Installation Guide
69 -2 219E F— 03 14
About your new thermostat
SETUPWIRINGASSISTANCETROUBLESHOOTING
NOTE: Some functions in the following pages
may not appear due to previous selections
made.
See pages 15–20 to change Function Settings.
Changing settings
Press s/t to
select function
Function Setting
Press s/t to
change setting
DONE
TUE
Inside Set To
70
0120
70
20
FAN
AUTO
M28341
3. Press DONE to exit & save changes.

RTH8500
15 69-2219EF—03
About your new thermostat
SETUP WIRING ASSISTANCE TROUBLESHOOTING
NOTE: If you set the time and date as shown on page 10,
press NEXT to function 0170 and go to page 16.
See page 14 to navigate between functions.
Function Settings & Options
0120 Year Setting
(rst two
digits)
Press s/t to change the rst two
digits of the year:
20 = Year 20xx
21 = Year 21xx
0130 Year Setting
(second two
digits)
Press s/tto change the last two
digits of the year:
01 - 99 (i.e., 2001 - 2099)
0140 Month Setting Press s/t to change the current
month:
01 - 12 (i.e., January - December)
0150 Date Setting Press s/tto change the current
date:
01 - 31
System setup

Advanced Installation Guide
69 -2 219EF— 03 16
About your new thermostat
SETUPWIRINGASSISTANCETROUBLESHOOTING
See page 14 to navigate between functions.
Function Settings & Options
0170 Select System
Type Press s/t to select your system
type:
1 Heat/cool: Gas, oil or electric
heating with central air condi-
tioning.
2 Heat pump: Heat pump with-
out backup or auxiliary heat.
3 Heat only: Gas, oil or electric
heat without central air condi-
tioning.
4 Heat only with fan: Gas, oil or
electric heat without central air
conditioning.
5 Hot water heat only (no fan):
Gas, oil or hot water heat with-
out central air conditioning.
6 Cool only: Central air condi-
tioning only.
7 Heat pump: Heat pump with
backup or auxiliary heating.
8 Heat/Cool Multiple stages:
2 heat stages (wires on Wand
W2), 2 cooling stages (wires on
Yand Y2).
9 Heat/Cool Multiple stages:
2 heat stages (wires on Wand
W2), 1 cooling stage (wire on
Y).
10 Heat/Cool Multiple stages: 1
heat stage (wire on W), 2 cool-
ing stages (wires on Yand Y2).
System setup

RTH8500
17 69-2219EF—03
About your new thermostat
SETUP WIRING ASSISTANCE TROUBLESHOOTING
See page 14 to navigate between functions.
Function Settings & Options
0180 Heating Fan
Control Press s/t to select your heating
system & fan control:
0 Gas or oil heat: Use this
setting if you have a gas or
oil heating system (system
controls fan operation).
1 Electric heat: Use this setting
if you have an electric heating
system (thermostat controls fan
operation).
0190 Heat Pump
Changeover
Valve (for heat
pumps only)
Press s/t to select whether your
changeover valve is used in heating
or cooling:
0 Cooling changeover valve:
Use this setting if you con-
nected a wire labeled “O” to
the O/B terminal (see page 22).
1 Heating changeover valve:
Use this setting if you con-
nected a wire labeled “B” to the
O/B terminal (see page 23).
System setup

Advanced Installation Guide
69 -2 219EF— 0 3 18
About your new thermostat
SETUPWIRINGASSISTANCETROUBLESHOOTING
See page 14 to navigate between functions.
Function Settings & Options
0240 Heating Cycle
Rate Press s/t to select your heating
system:
5 Gas or oil furnace: Standard
gas/oil furnace (less than 90%
efficiency).
9 Electric furnace: Electric
heating systems.
3 Hot water or high-efficiency
furnace: Hot water system or
gas furnace (more than 90%
efficiency).
1 Gas/oil steam or gravity
system: Steam or gravity heat
systems.
0270 Emergency
Heat Cycle
Rate (heat
pumps only)
Press s/t to select your heating
system:
9 Electric furnace: Electric
heating systems.
5 Gas or oil furnace: Standard
gas/oil furnace (less than 90%
efficiency).
3 Hot water or high-efficiency
furnace: Hot water system or
gas furnace (more than 90%
efficiency).
1 Gas/oil steam or gravity
system: Steam or gravity heat
systems.
System setup