Specifications

FEATURES
SPECIFICATIONS
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• Contemporary Styling with Large LCD Display
• 7 Day Programming Flexibility
• Battery Powered (2 "AA" Alkaline batteries included)
• Relay Outputs for Maximum Compatibility
• LCD Display Backlight
• Easy Access Front Battery Door
• Pre-Programmed for Quick Installation
• Meets Title 24 and Energy Star
®
Energy Saving Guidelines
• Vacation "HOLD" Mode
• Compressor Short Cycle Protection
• Adjustable Temperature Differential
• Residual Cooling Fan Delay
• Low battery Indication
• Quick Wiring Terminal Block
• High Temperature Safety Switch
• Low Temperature "Freeze" Protection
INSTALLATION
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3.1
Replacing Existing Thermostat
1. Always turn off power to the air conditioning or heating system prior to removing existing
thermostat.
2. Remove the cover of your old thermostat and locate the wire terminals. Do not remove
wires from terminals yet.
3. Using small pieces of masking tape label wires prior to removal from terminals. Use the
chart below to determine the new terminal designations for your new thermostat.
• Electrical Rating: 24 Volt AC (18-30 Volt AC)
2 amp maximum load per terminal
4 amp total maximum load (all terminals)
• Control Range: 45˚ - 90˚ F (7˚ - 32˚ C)
• Accuracy: +/- 1˚ F (+/- .5˚ C)
• DC Power: 3.0 Volt DC (2 AA Alkaline batteries included)
• Compatibility: Compatible with low voltage single sta ge gas, oil or electric
heating or cooling systems, including single stage heat pumps.
This thermostat can also be used on 250mv to 750mv millivolt
heating only systems.
• Terminations: Rc, Rh, G, W, Y, B, O
Old Terminal from New Terminal for
Existing Thermostat New Thermostat Terminal Description
V or Rc Rc Cooling Transformer
M, 4, Rh, or R Rh Heating Transformer
G or F G Fan Control
H, W or 4 W Heating Control
Y Y Cooling Control
B B Reversing Valve (Heating)
O O Reversing Valve (Cooling)
C None (Cap the Wire) 24 Volt AC, Transformer Common
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INSTALLATION
4. After labeling and removing all wires from terminals, unscrew the existing thermostat
mounting base from wall. Make sure to secure wires to prevent them from slipping
back into the hole in the wall.
NOTE: This thermostat is designed for use with a 24-Volt AC low voltage single
stage gas, oil or electric heating or cooling systems, including single stage heat
pumps. This thermostat can also be used on 250mv to 750mv millivolt heating only
systems. Do not use this thermostat on applications with voltages above 30 Volts AC.
3.2
Installing Your New Thermostat
NOTE: If you are installing this thermostat in a new installation be sure to locate
the thermostat 4 to 5 feet above the floor in accordance with applicable building
codes. Make sure to install the thermostat in a location that provides good airflow
characteristics and avoid areas behind doors, near corners, air vents, direct sunlight
or near any heat generating device. Installation in any of these areas could impact
thermostat performance.
1. Always turn off power to the air conditioning or heating system prior to installing your
new thermostat.
2. Place system switch on front of thermostat to OFF position.
3. Place fan control switch on front of thermostat to AUTO position.
4. Remove front of thermostat body from rear body by pressing release latch on bottom
of front body.
5. Place the thermostat rear body (mounting plate) against wall in the desired
thermostat location.
6. Guide thermostat wires through center hole in rear body. Continue to hold rear body
against wall.
7. Mark placement of mounting holes as appropriate and drill using a 3/16" drill bit.
8. Gently tap supplied plastic anchors into the holes in the wall.
cont.
Illustration of round and rectangular
mechanical thermostat exploded
views.