White Rodgers 1F80-0261 Installation Instruction

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INSTALLATION 
REMOVE OLD THERMOSTAT
1.  Shut off electricity at the main fuse box until installation is 
complete. Ensure that electrical power is disconnected.
2.  Remove the front cover of the old thermostat. With wires 
still attached, remove wall plate from the wall. If the 
old thermostat has a wall mounting plate, remove the 
thermostat and the wall mounting plate as an assembly.
3.  Identify each wire attached to the old thermostat using 
the labels enclosed with the new thermostat.
4.  Disconnect the wires from old thermostat one at a time. DO 
NOT LET WIRES FALL BACK INTO THE WALL.
5.  Install new thermostat using the following procedures.
ATTENTION!
This product does not contain mercury. However, this product 
may replace a unit which contains mercury.
Do not open mercury cells. If a cell becomes damaged, do 
not touch any spilled mercury. Wearing nonabsorbent gloves, 
take up the spilled mercury and place into a container which 
can be sealed. If a cell becomes damaged, the unit should be 
discarded.
Mercury must not be discarded in household trash. When the 
unit this product is replacing is to be discarded, place in a 
suitable container. Refer to www.white-rodgers.com for location 
to send the product containing mercury.
ATTACH THERMOSTAT  BASE TO WALL
1.  Remove the packing material from the thermostat. Gently 
pull the cover straight off the 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 (see Fig.1).
3.  Move base out of the way. Drill mounting holes.
4.  Push wires through opening in thermostat base.
5.  Fasten base loosely to wall using two mounting screws. 
Place a level against bottom of base, adjust until level, 
and then tighten screws. (Leveling is for appearance only 
and will not affect thermostat operation.) If you are using 
existing mounting holes, or if holes drilled are too large and 
do not allow you to tighten base snugly, use plastic screw 
anchors to secure subbase.
6.  Connect wires to terminals on base using appropriate 
wiring schematic (see fi gs. 2 through 4).
7.  Push excess wire into wall and plug hole with a fi re-resistant 
material (such as fi berglass insulation) to prevent drafts 
from affecting thermostat operation.
O/B TERMINAL SWITCH SELECTION
The O/B switch on this thermostat is factory set to the “O” 
position. This will accommodate the majority of heat pump 
applications, which require the changeover relay to be 
energized in COOL. If the thermostat you are replacing or the 
heat pump being installed with this thermostat requires a “B” 
terminal, to energize the changeover relay in HEAT, the O/B 
switch must be moved to the “B” position.
Mounting
Hole
Mounting
Hole
Opening
for wires
Gas/Elec
Switch
Battery
Door
O/B
Switch
Figure 1. Thermostat Base
GAS / ELEC SWITCH
If your system is a heat pump, the GAS/ELEC Switch must be 
set to ELEC (see Fig. 1) If your system is a single stage, the 
switch must be set to GAS. The switch setting must agree with 
the system confi guration selected in the confi guration menu.
BATTERY LOCATION
“AA” Alkaline Batteries
Two “AA” alkaline batteries are installed in your thermostat 
with a battery tag to prevent power drainage. Prior to use, 
open the battery door and remove the battery tag. To open, 
pull the battery door as shown by the arrow and lift open. The 
two “AA” batteries will operate all functions or maintain time 
and continuously display the temperature during a loss of AC 
power. Installed batteries will also allow programming prior to 
installation. To replace batteries, pull the battery door shown 
by the arrow and lift open. Using the polarity indicated inside 
the battery door, insert the batteries. To close the battery door, 
swing the door down while pulling in the direction of arrow. 
Once fully down, snap the door back into position.
Thermostat can be powered by system AC power or Battery. If 
 is displayed, the thermostat is battery powered. If 
 is not 
displayed, thermostat is system powered with optional battery 
back-up. When battery power remaining is approximately half, 
the 
 will be displayed. When “Change 
 is displayed, 
install fresh “AA” alkaline batteries immediately. For best 
results, use new premium brand alkaline batteries such as 
Duracell® or Energizer®. We recommend replacing batteries 
every 2 years. 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. When less than 
two months of battery life remain, the setpoint temperature will 
offset by 10 degrees (10 degrees cooler in Heat mode / 10 
degrees warmer in Cool mode). If offset occurs, the normal 
setpoint can be manually reset with 
 or 
. Another offset 
will occur within two days if batteries are not replaced. To 
replace the batteries, set system to OFF.