Programmable Thermostat
Owners Manual
Model: PS3110 Series
Congratulations!
Your new thermostat will provide years of reliable service.
By saving energy, your thermostat will pay for itself during
its first season of use. Thank you for buying our product!
Please read this manual for complete instructions on
installing and operating your thermostat. If you require
further assistance, please feel free to contact us.
IMPORTANT INFORMATION
1. This thermostat is designed to work on the following
systems:
• Gas – Standing Pilot
• Oil – Fired Furnace
• Gas – Electronic Ignition
• Single Stage Heat Pumps –
with no auxiliary heat
• Gas – Fired Boilers
• Electric Air Conditioning
• Gas – Millivolt Systems
• Electric Furnace
• Oil – Fired Boilers
This thermostat will NOT control multi-stage heat pumps
or 110/220V baseboard electric heating systems.
2. Temperature Range
This thermostat can be programmed between 45°F and 95°F
(7°C and 35°C). However, it will display room temperatures
from 30°F to 99°F (0°C and 37°C). HI will be displayed if
the temperature is higher than 99°F (37°C), and LO will be
displayed if the temperature is lower than 30°F (0°C).
This thermostat will automatically shut down in Heat
mode if the temperature rises above 95°F (35°C), and will
automatically shut down in Cool mode if the temperature
drops below 45°F (7°C).
3. Compressor Protection
After shutting off the cooling system, this thermostat has
a 4 minute delay before it can be restarted. This feature
will prevent damage to your compressor caused by rapid
cycling. It does not prevent a rapid compressor restart due
to short power outages.
4. Battery Warning
Two fresh AA alkaline batteries should provide over one
year of service. When the batteries need to be replaced.
The low battery indicator will flash on the display. When
you see this message, install new alkaline batteries. You
have approximately 1 minute to change the batteries and
keep the thermostat’s clock and program settings. Once
the batteries have become too low to ensure proper
operation, your system will be turned off, and the display
will be cleared except for flashing Low Battery Indicator on
the LCD display.
CAUTION: When only the Low Battery icon
flashes on the display, the thermostat is shut
down, and your system will no longer operate.
In this condition, there is no temperature control.
NOTE: The backlight will not function when the thermostat
is in low battery condition.
NOTE: If you plan to be away from the premises over 30
days, we recommend that you replace the old batteries
with new alkaline batteries prior to leaving.
FEATURES
Structure of thermostat and explanation of the keypads
Up and Down Key. Used for
changing the Temperature
setting. Also used for increasing
and decreasing selections in the
Time, Program, and Span
functions.
LCD Display Shows
Time, Day, Temperature,
and other feature
information as required.
Battery Compartment
Front access allows
easy insertion of two
AA 1.5v batteries.
Front Door Battery cover Open with one finger from side lips.
Fan Switch used for Automatic
or Continuous fan operation.
Front Door. To open or close
the door by pressing it softly.
Hold/Return Key. Used for setting a
permanent (vacation)hold, and for returning
to the normal display from Day & Time setting,
Programming or Span setting modes.
Filter Key. Resets
filter change
counter to zero
Program Key. Used for
entering and modifying
Programs. Use with the Up
and Down keys to set
times and temperatures.
Press when in Clock setting
mode toselect between 12
and 24 hour clock modes.
System Switch
Selector switch for
Heat, Cool and Off..
Day/Time Key
Used for entering
the Clock setting
mode. Use with the
Up and Down keys
to set the time and day.
Backlight Key
by Uni-Line®
OPERATION
Setting Day and Time
• The LCD will show this information
when batteries are first installed.
The temperature will update after a
few seconds.
• During time and day setting mode, the
temperature and program displays will go blank.
Refer to the Steps below.
STEP 1:
• Press to enter time and day setting
mode. The current hour and the AM/
PM indicator will be flashing.
• Press up or down to change the hour
to the current hour.
Note the AM/PM indicator, as the display will change at
12AM and 12PM.
STEP 2:
• Press again to change from hour
setting to minute setting. The current
minute will be flashing.
• Press up or down to change the
minute to the current minute.
STEP 3:
• Press again to change from minute
setting to day setting. The current day
will be flashing.
• Press up or down to change the day
to the current day.
STEP 4:
• Press again to change back to the
normal display.
NOTE: You may press
at any time during day
and time setting to return to the normal display.
12Hr. / 24 Hr. Time Format
Your thermostat is set from the factory in normal 12
(AM/PM) time format. To change to 24 hour (military) time,
press
during time and day setting mode to toggle
between the 12 hour and 24 hour formats. The AM / PM
indicator will not be displayed in 24 hour mode. Both the
current time and all programs will automatically change to
the selected format.
PROGRAMMING
The following time and temperature settings are
pre-programmed into the thermostat:
Temperature in F° (C°)
Program Number Time
Heat
Cool
1
6:00 am
68°F(20°C) 78°F(26°C)
2
8:00 am
60°F(16°C) 85°F(29°C)
3
4:00 pm
68°F(20°C) 78°F(26°C)
4
10:00 pm 60°F(16°C) 82°F(28°C)
• All 7 days of the week have the same default programs.
Personal Program Schedule
• You can revise the factory programs to match your
own schedule. Use this Personal Program Schedule to
determine which times and temperature settings match
your comfort and energy saving requirements. Use a
pencil so you can revise your records each time you
change your program settings.
Heating
Day
Program 1 Program 2 Program 3 Program 4
Monday –
Friday
Time
Temp
Time
Temp
Time
Temp
Time
Temp
Saturday –
Sunday
Time
Temp
Time
Temp
Time
Temp
Time
Temp
Cooling
Day
Program 1 Program 2 Program 3 Program 4
Monday –
Friday
Time
Temp
Time
Temp
Time
Temp
Time
Temp
Saturday –
Sunday
Time
Temp
Time
Temp
Time
Temp
Time
Temp
Revising Programs
• Familiarize yourself with manually changing programs,
so that you can easily modify the programs as your
comfort needs change. Follow the steps below to
change the program times and temperature.
NOTE:
1) The program time can be set in 10-minute increments.
2) The program temperature can be set in increments of
1°F (1°C).
3) After 15 seconds without a key press, the thermostat
will return to normal display mode.
4) When setting the program time, note the AM / PM
indicator.
STEP 1:
• Slide the System Switch to the HEAT
or COOL position to program the
corresponding system.
NOTE: If the System Switch is in the OFF position, the last
position used will be programmed.
STEP 2:
• Press to enter program mode. HEAT
or COOL will be displayed on the LCD.
STEP 3:
• The program hour and AM or PM indicator will
flash. Press to change the hour.
STEP 4:
• Press again to change to the minute
position. The current minute will flash.
• Press to change the minute.
STEP 5:
• Press again to change to the program
temperature. The current program
will flash.
• Press to change the temperature.
STEP 6:
• Press again to move to the next program number.
• Repeat Step 3 through 5 to change the remaining
weekday and weekend programs. (There are a
total of 8 programs.)
• After cycling through all 8 programs, press
again to return the display to normal.
• Press at any time to exit the program mode.
Reviewing Programs
To review your program settings, press
repeatedly to
cycle through the programs. You also can make changes at
any time.
System Selector Switch
The System Selector switch on the front of the thermostat
determines the operating mode of the thermostat. You may
select COOL, OFF, or HEAT.
NOTE: Anytime you install or remove the thermostat from
the wallplate, slide the System Selector to the OFF position
to prevent rapid system On-Off.
Fan Switch
The fan switch should normally be set in the AUTO
position. The fan will be turned on during normal
operation of your system. In a normal gas or oil
furnace, the fan will be turned on by your furnace after its
warm-up delay. For electric heat, air conditioning, and heat
pump operation, the fan will turn on with the system.
To run the fan continuously, slide the Fan switch to the ON
position.
Temporary Manual Override
To temporarily change the current set
temperature without affecting your program:
• Press and hold for about 1 second to
enter Manual Override mode. When
display flashes, you can release the key.
• Press again to change to your desired set
temperature. Hold the key for 2 seconds to
fast-advance set temperature.
• Press to return to normal mode, or wait 5 seconds for it
to return automatically.
• The current program number will flash to signify the
temporary override.
• At the next program change time, the temporary
override is canceled, and the next program temperature
becomes the setpoint temperature.
• Press, then press again. This will
return the set temperature to the
current program set temperature.
Permanent Override or a Designated Day Override
To hold your manual override for
vacation or until a designated day.
• Press to make the current program
temperature the HOLD temperature. HOLD
will be displayed on the LCD, and the program
number will disappear.
• Follow the Temporary Manual
Override instructions above to
change the Permanent Manual
Override temperature.
• You can confirm the held set temperature by pressing for
less than 1 second.
