Table A
If the code letter on
your existing
Thermostat is
then mark the wire
with label shown
and connect to
thermostat terminal
shown
Mount wallplate and Thermostat
Remove the wallplate from your thermostat. See Figure 2.
Figure 2
Position wallplate on wall and pull existing wires through large opening.
Then level for appearance. Mark holes for plastic anchors provided, if
your existing holes do not line up with those on the wallplate.
Drill holes with 3/16” bit and gently tap anchors into the holes until flush
with wall.
Reposition wallplate to wall, pulling wires through large opening. Insert
mounting screws provided into wall anchor and tighten. See Figure 3.
Figure 3
NOTE: 5- Wire Systems
If your thermostat has one wire marked R or Rh (2, 3, or 4-wire system),
then leave the jumper wire between the Rh and Rc terminals on the
wallplate. Otherwise, if you have separate Rh and Rc wires (5-wire system),
then remove the jumper wire between the Rh and Rc terminals.
Connect Wires and Mount Thermostat to wallplate
Match and connect the labeled wires to the appropriate coded terminal
screws on the wallplate. (See Figure 4, 5.) Ignore any wires which may
be present, but which were note connected to the old thermostat.
Figure 4
Figure 5
Refer to the Wiring Diagrams below to be sure your system is wired
correctly.
If your system is a single stage heat pump and uses an O or B wire, you
must move the System Selector switch inside the thermostat to the Heat
Pump position. If you have a normal furnace or electric system, leave the
switch in the Standard position. Refer to the System Selector section on the
back for more information on this switch.
Be sure to tighten the terminal screws securely, otherwise a loose wire
could cause operational problems with your system or thermostat.
Push excess wire back into the hole to prevent interference when
installing the thermostat to the wallplate.
Make sure the System Switch is set to OFF, and the Fan Switch is set to
AUTO.
Insert the tabs on top of the thermostat body into the slots at the top of the
wallplate. Press the bottom of the thermostat body into the snap on the
bottom of the wallplate. Refer to Figure 2. (NOTE: Do not force the
thermostat onto the wallplate, as the terminal pins may be damaged. If it
does not snap properly, the thermostat may not work.)
Insert the two AA size alkaline batteries, observing the polarity marked
inside the battery compartment.
Switch on the main power at the panel or furnace.
Wiring Diagrams
X-No Connection
Selector Switches
In order for this thermostat to control your system, the system type must be
specified by the selector switches on the printed circuit board inside the
thermostat. There is also a selector switch for your choice of Fahrenheit or
Celsius temperature display. See figure 6.
Heating System Selector (HG – HE switch)
The factory position for this switch is in the “HG” position. Leave it in this
position if you have a gas furnace or an oil burner. If you have an electric
furnace, test to see whether the Heat and Fan come on as expected after
installation. If the Fan operation is normal, leave it in the “HG” position. If
the Fan does not come on within a minute of the thermostat calling for
heating, change the switch position to “HE”. The system selector has no
effect in the cooling mode.
NOTE: “HG” position is for gas and most other systems. “HE” position is for
certain electric systems having a fan relay.
System Selector (STANDARD – HEAT PUMP switch)
The factory position for this switch is in the STD position. Leave it in this
position if you have ANY system that uses gas, oil, electric, or hot water
heating. If you have a single-stage Heat Pump (no auxiliary or emergency
heat source), then slide the switch to the HP position. Be sure the reversing
valve wire is connected to the correct terminal for your heat pump (Rc/O) or
(Rh/B).
˚F / ˚C selector (Fahrenheit / Celsius)
Your thermostat is set for ˚F mode from the factory. In order to change to ˚C
mode, slide the switch to ˚C and hold any key about 2 seconds without the
battery, then place the battery again.
NOTE: Unless press any key about 2 seconds without the battery, then
place the battery again.
Figure 6
TROUBLESHOOTING
Problem
Solution
1. Check battery connections and batteries.
No Display
2. Move the battery out and wait for about 1
minutes then Replace Batteries..
Entire Display
Dims.
1. Replace Batteries.
Auto Fan Does Not
Turn On Properly.
1. Move HG/HE selector to correct position.
1. Check that the function switch is in the correct
position (“HEAT” or “COOL”).
2. There may be as much as 4-mintue delay
before the system turns On – wait and check.
(Compressor protection delay.)
3. Check your circuit breakers and switches to
ensure there is power to the system.
4. Replace batteries.
5. Make sure your furnace blower door is closed
properly.
6. If your non-heat pump system only uses
4-wires, be sure the jumper wire is installed
between the Rh/B and Rc/O terminals.
7. Check the position of the Reversing Valve
selector switch: Standard or Heat Pump.
Heating or Cooling
Does Not Go On or
Off.
8. If you have single-stage heat pump, be sure
the jumper wire is installed between the Y and
W terminals.
Erratic Display
1. Move the battery out hold any key then place
the battery again. Then reprogram.
If unit continues to
operate in the Off
position.
1. Replace unit.
Thermostat
permanently reads
“HI”,
“LO”,
or
“E1” , “E2”.
1. Replace unit.
L
N
Rh
H
E
H
G
C
C
C
C
C
C
