This thermostat provides electronic control of 24 VAC single-stage heating and cooling systems, or 750 mV heating systems.
Power Options
Changeover Options
System Settings
Fan Settings
Must be installed by a trained, experienced technician
CAUTION: ELECTRICAL HAZARD
Can cause electrical shock or equipment damage. Disconnect power before beginning installation.
MERCURY NOTICE
If this product is replacing a control that contains mercury in a sealed tube, do not place the old control in the trash. Contact your local waste management authority for instructions regarding recycling and proper disposal.
Install the thermostat about 5 feet (1.5m) above the floor in an area with good air circulation at average temperature.
Do not install in locations where the thermostat can be affected by:
Package contents
Check to make sure your package includes the following items:
Required tools & supplies
Remove the wallplate from the thermostat as shown at left, then follow directions below for mounting.
CAUTION: ELECTRICAL HAZARD. Can cause electrical shock or equipment damage.
Disconnect power before wiring.
Wiring
Terminal Designations
AC Power
The thermostat can be powered by 24 VAC power, or by batteries. To wire the thermostat for AC power, connect the common side of the cooling transformer to the “C” terminal as shown at left.
Important: Remove the R/Rc jumper for 2-transformer systems only. (See wiring diagram on page 5.)
Battery Power
The thermostat can be powered by batteries alone or, if used with AC power, can provide backup power. During power interruptions, the batteries will save time/day settings and power the display. After installation, batteries can be changed without removing the thermostat from the wall (see page 11).
To Mount Thermostat
Align the 4 tabs on the wallplate with corresponding slots on the back of the thermostat, then push gently until the thermostat snaps in place.
Follow the procedure below to configure the thermostat to match the installed heating/cooling system, and customize feature operation as desired.
System type | 0 Gas, oil or electric heat with air conditioning 1 Heat pump 2 Heat only (2-wire systems/power to open & close zone valves/ normally open zone valves) 3 Heat only with a fan | ||
4 | Cool only | ||
2 | Changeover valve | 0 | Changeover valve (O/B terminal energized in cooling) |
(O/B terminal) | 1 | Changeover valve (O/B terminal energized in heating) | |
3 | Fan control | 0 | Gas or oil furnace — equipment controls fan in heating |
(heating) | 1 | Electric furnace — thermostat controls fan in heating | |
5 | Heating cycle rate | 5 | For gas or oil furnaces of less than 90% efficiency |
(CPH: cycles/hour) | 1 | For steam or gravity systems | |
3 | For hot water systems & furnaces of over 90% efficiency | ||
9 | For electric furnaces[Other cycle rate options: 2, 4, 6, 7, 8, 10, 11 or 12 CPH] | ||
9 | Compressor cycle rate (CPH) | 3 | Recommended for most compressors[Other cycle rate options: 1, 2, 4, 5 or 6 CPH] |
12 | System setting | 0 | Manual changeover (Heat/Cool/Off) |
adjustment | 1 | Auto changeover (Heat/Cool/Auto/Off) **See page 10 | |
2 | Auto changeover only (Auto) **See page 10 | ||
13 | Adaptive Intelli- | 1 | On **See page 10 |
gent Recovery™ | 0 | Off | |
14 | Temperature | 0 | Fahrenheit |
display | 1 | Celsius | |
15 | Compressor protection | 5 | Five-minute compressor off time **See page 10 [Other options: 0, 1, 2, 3 or 4-minute off time] |
16 | Schedule format | 0 | 5/2 (programmable weekdays and weekends) |
1 | 5/1/1 (weekdays, Saturday & Sunday programmable) |
8 | Emergency heat | 9 | For electric emergency heat |
cycle rate (CPH) | 1 | For steam or gravity systems | |
3 | For hot water systems & furnaces of over 90% efficiency | ||
5 | For gas or oil furnaces of less than 90% efficiency [Other cycle rate options: 2, 4, 6, 7, 8, 10, 11 or 12 CPH] | ||
9 | Compressor cycle rate (CPH) | 3 | Recommended for most compressors [Other cycle rate options: 1, 2, 4, 5 or 6 CPH] |
10 | Second stage compressor cycle rate (CPH) | 3 | Recommended for most compressors [Other cycle rate options: 1, 2, 4, 5 or 6 CPH] |
12 | System setting | 0 | Manual changeover (Heat/Cool/Off) |
adjustment | 1 | Auto changeover (Heat/Cool/Auto/Off) **See page 14 | |
2 | Auto changeover only (Auto) **See page 14 | ||
13 | Adaptive Intelli- | 1 | On **See page 14 |
gent Recovery™ | 0 | Off | |
14 | Temperature | 0 | Fahrenheit |
display | 1 | Celsius | |
15 | Compressor protection | 5 | Five-minute compressor off time **See page 14 [Other options: 0, 1, 2, 3 or 4-minute off time] |
16 | Schedule format | 0 | 5/2 (programmable weekdays and weekends) |
1 | 5/1/1 (weekdays, Saturday & Sunday programmable) | ||
27 | Heat temperature | 90 | Highest heating temperature setting |
Cool temperature range stops :50 Lowest cooling temperature setting
51-99 Cooling temperature range (increments of 1°F, or 0.5°C)
Installer system test
Follow the procedure below to test the heating, cooling and fan
10 | Heating system | 0 | Heat and fan turn off. |
1 | Heat turns on. Fan also turns on immediately if Function 1 or 3 is set to “1” (see page 8). | ||
30 | Cooling system | 0 | Compressor and fan turn off. |
1 | Compressor and fan turn on. | ||
40 | Fan system | 0 | Fan turns off. |
1 | Fan turns on. | ||
70 | Thermostat | 71 | Software revision number (major revisions) |
information | 72 | Software revision number (minor revisions) | |
(for reference only) | 73 | Configuration identification code (major) | |
74 | Configuration identification code (minor) | ||
75 | Production configuration date code (week) | ||
76 | Production configuration date code (year) |
CAUTION: EQUIPMENT DAMAGE HAZARD
Compressor protection (minimum off time) is bypassed during testing. To prevent equipment damage, avoid cycling the compressor quickly.
Auto Changeover is a feature used in climates where both air conditioning and heating are used on the same day. When the system is set to Auto, the thermostat automatically selects heating or cooling depending on the indoor temperature. Heat and cool settings must be at least 3 degrees apart. The thermostat will automatically adjust settings to maintain this 3-degree separation (called “deadband”). The 3-degree separation between heating and cooling set temperatures is fixed, and cannot be changed.
Adaptive Intelligent Recovery eliminates guesswork when setting your schedule. It allows the thermostat to “learn” how long your furnace and air conditioner take to reach the temperature you want.
Just set your program schedule to the time you want the house to reach your desired temperature.The thermostat then turns on the heating or cooling at just the right time to reach your scheduled temperature at your scheduled time.
For example: Set the Wake time to 6 am, and the temperature to 70°.The heat will come on before 6 am, so the temperature is 70° by the time you wake at 6.
This feature helps prevent damage to the compressor in your air conditioning or heat pump system.
Damage can occur if the compressor is restarted too soon after shutdown. This feature forces the compressor to wait for a few minutes before restarting.
During the wait time, the message Cool On or Heat On (heat pumps only) will flash on the display. When the safe wait time has elapsed, the message stops flashing and the compressor turns on.
If you have difficulty with your thermostat, please try the suggestions below. Most problems can be corrected quickly and easily.
Display is blank
Temperature settings do not change
Make sure heating and cooling temperatures are set to acceptable ranges:
The heating system does not respond (“Heat On” appears on the screen)
The cooling system does not respond (“Cool On” appears on the screen)
The fan does not turn on in a call for heat
Heat pump issues cool air in heat mode, or warm air in cool mode
Heat/cool both on at same time, or heat does not turn off
Cannot change system set to “Heat”
Cannot change the system setting to “Cool”
“Heat On” is not displayed
“Cool On” is not displayed
Cool On” or “Heat On” is flashing
Please contact your distributor to order replacement parts.
Battery holder ………………………………………………Part Number 50007072-001
Cover plate assembly ………………………………….Part Number 50002883-001
(Use to cover marks left by old thermostats.)
Electrical Ratings
Automation and Control Solutions
® U.S. Registered Trademark. Patents pending.
Copyright © 2005 Honeywell International Inc. All rights reserved.
Printed in U.S. Document number 69-1714. Date 01-2005. www.honeywell.com/yourhome
Honeywell International Inc. 1985 Douglas Drive North
Golden Valley, MN 55422
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive Scarborough, Ontario M1V 4Z9
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