INSTALLATION
!WARNING
Thermostat installation and all components of the control system shall conform to Class II circuits per the NEC code.
Remove Old Thermostat
Before removing wires from old thermostat, mark wires for terminal identification so the proper connections will be made to the new thermostat.
Installing New Thermostat
1.Pull the thermostat body off the thermostat base. Forcing or prying on the thermostat will cause damage to the unit.
2.Place base over hole in wall and mark mounting hole locations on wall using base as a template.
3.Move base out of the way. Drill mounting holes. If you are using existing mounting holes and the holes drilled are too large and do not allow you to tighten base snug- ly, use plastic screw anchors to secure the base.
4.Fasten base snugly to wall using mounting holes shown in Figure 1 and two mounting screws. Leveling is for appearance only and will not affect thermostat operation.
5.Connect wires to terminal block on base using appropriate wiring schematic.
6.Push excess wire into wall and plug hole with a fire re- sistant material (such as fiberglass insulation) to prevent drafts from affecting thermostat operation.
7.Carefully line the thermostat up with the base and snap into place.
Battery Location
2 "AA" alkaline batteries are included in the thermostat at the factory with a battery tag to prevent power drainage. Remove the battery tag to engage the batteries.
To replace batteries, set system to OFF, remove thermostat from wall and install the batteries in the rear along the top of the thermostat (see Figure 1). For best results, use a premi- um brand "AA" alkaline battery such as Duracell® or Ener- gizer®. If the home is going to be unoccupied for an extended
period (over 3 months) and 
is displayed, the batteries should be replaced before leaving.
Power Stealing Switch
The Power Stealing Switches (Fig. 1) should be left in the "On" position for most systems. The information in the fol- lowing table details the thermostat power method and switch options.
WIRING CONNECTIONS
Thermostat Power Method | Switch Position/Description |
|
|
Battery Powered, no 24 Volt | Switches "On", thermostat runs |
system power available. | on batteries. |
|
|
Hardwired with Battery | Switches "On", thermostat |
runs on power directly from | |
with common connection from | transformer with battery back- |
transformer to "C" terminal on | up. |
thermostat. |
|
|
|
*Battery Powered with Power | Switches "On", thermostat runs |
Stealing Assist, for 24 Volt | on batteries and supplemental |
systems with no common | power drawn through the heat |
connection from transformer to | or cool circuit. |
"C" terminal on thermostat. |
|
|
|
*Power Stealing Assist is very reliable to increase battery life, but on a small number of heating or cooling systems with high impedance electronic modules you may observe one of the fol- lowing conditions:
1.The furnace draft inducer motor may run with no call for heat.
2.The furnace fan may turn on with no call for heat or may not turn off.
3.The furnace may not turn off when the call for heat ends.
4.The air conditioner may not turn off when the call for cool ends.
If the Power Stealing Assist method is not compatible with your system, place the Power Stealing Switches to "Off". This cancels Power Stealing Assist, operates the thermostat on batteries and corrects the condition.
Figure 1 – Thermostat Base
Mounting | Mounting |
Hole | Hole |
Place Level | Place Level |
across Mounting Tabs | across Mounting Tabs |
(for appearance only) | (for appearance only) |
Rear view of thermostat | |
| 2 "AA" Batteries |
| Power Stealing |
* | Switches |
| |
* A1 For Damper Control Not Applicable To This Model. | |
Refer to equipment manufacturers' instructions for specific system wiring information. After wiring, see CONFIGURA- TION section for proper thermostat configuration.
Wiring diagrams shown are for typical systems and describe the thermostat terminal functions.
| TERMINAL DESIGNATION DESCRIPTIONS |
Terminal Designation | Description |
|
|
O/B | Changeover valve for heat pump energized constantly in cooling and off/heating |
Y2 | 2nd Stage Compressor |
Y | Compressor Relay |
G | Fan Relay |
RC | Power for Cooling |
RH | Power for Heating |
C | Common wire from secondary side of cooling (Optional). Required for fault indication, continuous back- |
| light operation or remote temperature sensor operation 6 Powered closed 3rd wire for |
W/E | Heat Relay/Auxiliary Heat Relay (Stage 1) (3rd Stage Heat in HP2) |
W2 | 2nd Stage Heat (4th Stage Heat in HP2) |
L | Compressor diagnostic indicator for systems with diagnostic connection typically found on Heat pump |
| systems or with Copeland's Comfort Alert |
|
|
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