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Installation Guide
® U.S. Registered Trademark.
© 2006 Honeywell International Inc.
69-1920ES M.S. 03-06
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
http://yourhome.honeywell.com
Automation and Control Solutions
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Scarborough, Ontario M1V4Z9
Printed in U.S.A. on recycled
paper containing at least 10%
post-consumer paper fibers.
Special functions
Auto Changeover (Setup Function 12): When set to Auto, the thermostat automatically selects
heating or cooling depending on the indoor temperature. The thermostat will automatically
adjust heat and cool settings to maintain a 3-degree separation (fixed). Note: If you select Auto
Changeover Only, the System Setting on the thermostat will stay locked in the Auto position,
preventing the user from changing it to Em Heat, Heat, Cool or Off.
Adaptive Intelligent Recovery™ (Setup Function 13): Allows the thermostat to “learn” how
long the furnace and air conditioner take to reach programmed temperature settings, so the
temperature is reached at the scheduled time.
Compressor Protection (Setup Function 15): Forces the compressor to wait a few minutes
before restarting, to prevent damage. During the wait time, the message Cool On or Heat On
(heat pumps only) will flash on the display.
Accessories & replacement parts
Please contact your distributor to order replacement parts.
Battery holder . . . . . . . . . . . . . . . . . . . . . . . . . . . .Part Number 50007072-001
Cover plate assembly* . . . . . . . . . . . . . . . . . . . . .Part Number 50002883-001
12 pack of medium cover plates* . . . . . . . . . . . .Part Number 50007298-001
*Use to cover marks left by old thermostats.
Specifications
Temperature Ranges
• Heat: 40� to 90�F (4.5� to 32�C)
• Cool: 50� to 99�F (10� to 37�C)
Operating Ambient Temperature
• 32� to 120�F (0� to 48.9�C)
Shipping Temperature
• -20� to 120�F (-28.9� to 48.9�C)
Operating Relative Humidity
• 5% to 90% (non-condensing)
Physical Dimensions
• 3-9/16" H x 5-13/16" W x 1-1/2" D
91 mm H x 147 mm W x 38 mm D
Electrical Ratings
Terminal Voltage (50/60Hz) Running Current
W Heating 20-30 Vac 0.02-1.0 A
(Powerpile) 750 mV DC 100 mA DC
W2 (Aux) Heating 20-30 Vac 0.02-0.5 A
Y Cooling 20-30 Vac 0.02-1.0 A
Y2 Cooling 20-30 Vac 0.02-1.0 A
G Fan 20-30 Vac 0.02-0.5 A
O/B Changeover 20-30 Vac 0.02-0.5 A
E Emergency heat 20-30 Vac 0.02-1.0 A
L Output 20-30 Vac 0.02-0.5 A