Robertshaw RS3110 Series Manual Do Proprietário

• Press again. Hold day will be displayed on the 

LCD and the clock will disappear

• Press day key to add override days. Press

Program key to reduce override days.

• Follow the Temporary / Designated Day Override 

instructions above to change the Permanent
Manual Override temperature.

• Under Permanent Override press hold/return key

twice. Under a Designated Day Override press the
hold once. The thermostat will return to the current 
program, and the HOLD display will be canceled.

Your thermostat also keeps a record of the number of hours
your filter has been in use. To maximize your system’s 
performance and energy efficiency, change or clean your 
filter regularly.

• When the total system runtime for

heat and cool reaches 400 hours, FILT
will alternate with the current time on
the LCD display to remind you to
clean or change your system’s filter.
FILT will continue to flash until the
counter is set back to zero.

• Press to review total filter usage. The

display will blink FILT, then show the
filter monitor counter. After 15 sec-
onds, the display will return to normal mode. 
In this example, the counter is at 410 Hours, 
26 Minutes.

• To reset the filter monitor counter, depress FILTER

for 3 seconds. The display will blink and the 
counter will be reset to zero.

Your thermostat is set at the factory to cycle at 2ºF (1ºC)
above and below the set temperature (DIFF = 2). This 
setting has been designed to provide a comfortable room
temperature under most conditions. However, if you find
your system cycling too often, the DIFF can be adjusted 
to modify the cycle time.

• Press and hold BOTH up and down keys for three

seconds. The display will flash, and DIFF will be 
displayed on the LCD.

• Press the up key to raise the DIFF to 3. This setting

INCREASES to cycle time by allowing your system to
run LONGER.

• Press the down key to lower the DIFF to 1. This 

setting DECREASES the cycle time by causing 
your system to run SHORTER.

The DIFF settings remain the same for both HEAT and
COOL. The DIFF can be changed at any time and is 
independent of program times or temperatures. When 
batteries are installed in the thermostat, the DIFF is reset
back to Setting 2.

Your thermostat has an electroluminescent lamp that 
backlights the display for easy viewing in the dark. When
any key is pressed, the display is illuminated.

The display will remain illuminated for 8 seconds after the
last key is pressed. This allows the light to stay on if you
need to operate several keys.

Note: If the thermostat is in Low Battery warning condition,
the backlight will not operate. Replace with 2 new AA 
alkaline batteries to restore the backlight function.

Your thermostat has a two-stage low battery
warning system. When the batteries are first
detected to be weak, the first stage low battery
warning is indicated by a battery symbol 
flashing on the LCD display. At your earliest
convenience, you need to replace the batteries
with 2 new AA alkaline batteries.

When the batteries become too weak for 
normal operation, the thermostat enters the second stage
low battery warning which shuts down the thermostat. In
this condition, BATT flashes alone on the display, and the
thermostat will turn your system off. Your system will remain
shut off until the batteries are replaced.

Auto Recovery calculates how early to turn
your system back on, so the room temperature
is comfortable by the start of the comfort 
temperature program period. Auto Recovery
works in both heat and cool modes.

• When the thermostat is in Auto Recovery mode, 

the display will alternate RECO with the time, and the 
program indicator will flash.

• Auto Recovery can be disabled by sliding the Recovery

switch on the circuit board to disable.

• Auto Recovery will not operate if Permanent Hold or

Temporary Hold is in operation.

• Auto Recovery can be canceled manually if

HOLD/RETURN is pressed during the recovery process.

• Auto Recovery will be canceled and the thermostat will

change to next period.

If the thermostat is unable to control your 
system due to a battery problem, the thermo-
stat will enter Error Mode. In this condition, 
the thermostat flashes E1 or E2 on the LCD
display, and shuts off your system. To correct
this problem, replace the batteries with 2 new
AA alkaline batteries, even if you have recently
replaced them. Remove the battery, hold any key, then
replace the battery again. You will need to reprogram 
your thermostat and confirm normal operation.

If Error Mode returns, please contact us for further 
information.

Your thermostat will automatically shut down in Heat mode
if the room temperature rises above 95ºF (35ºC). It will shut
down in Cool mode if the room temperature drops below
45ºF (7ºC).

This thermostat includes a bimetal switch that will 
automatically turn on the heat when the temperature 
reaches about 41ºF (5ºC).

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.

• Fº / Cº selector (Fahrenheit / Celsius) 

Your thermostat is set for Fº from the factory. In order to
change to Cº, slide the switch to Cº, remove the batteries,
wait for about 1 minute, then replace the batteries.

• 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 heat, change the switch position to HE. The 
system selector has no effect in the cooling mode. 

• 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 revers-
ing valve wire is connected to the correct terminal for your
heat pump (Y/O) or (W/B).

• Auto Recovery Selector (DISABLE/ENABLE)

Your thermostat is set from the factory with the Auto
Recovery Feature enabled, which complies with the EPA
ENERGY STAR Program. If you prefer to use normal 
recovery, slide the switch to the DISABLE position.

What You Need

This thermostat includes two #8 slotted screws and two wall
anchors for mounting. To install your thermostat, you should
have the following tools and materials. 

• Slotted screwdriver(s)
• Small Philips screwdriver
• Hammer
• Electric drill and 3/16” bit 
• Two 1.5V (AA) size alkaline batteries (included)

Remove existing thermostat cover and thermostat. See
Figure 1. Some thermostats will have screws that must first
be removed. Once the wall mounting plate is exposed, look
for wires. If wires are not visible, they may be connected to
the back of the wall plate. Again, look for screws, tabs, etc.
Some models have doors that open to expose wires and
mounting screws. See Figure 1.

• Each wire coming from the wall to the existing thermostat

is connected to a terminal point on that thermostat. Each
of these terminal points is usually marked with a code 
letter as shown in Table A below.

• Note that this thermostat has multiple function terminals

that allow single stage heat pump capability. Standard
systems use: Rh, Rc, G, Y, W. Single stage heat pumps
use: R, Y, G, and O or B. Table A below shows the 
multiple functions of the terminals. Use the terminals that
match your system.

• The number of wires in your system can be as few as 

two (for heat only systems), as many as eight, or any
number in between. If you follow the labeling procedures
correctly, you do not have to be concerned about how
many wires there are.

• There is often no terminal marking

on the existing thermostat of two
wire, heat only systems. Just 
connect either of the wires to the
RH terminal, then connect the other
wire to the W terminal to complete
the circuit.

APPLY THE SELF-ADHESIVE LABELS PROVIDED TO
THE WIRE AS SHOWN IN TABLE A BELOW. For exam-
ple, attach the label marked W to the wire that goes to
the W or H terminal on your existing thermostat. IGNORE
THE COLOR OF THE WIRES since these do not always
comply with the standard.

• After labeling wires, disconnect them from the existing

thermostat.

• Remove existing wall plate. To make sure wires do not fall

back into wall opening, you may want to tape them to the
wall. 

• If hole in wall is larger than necessary for wires, seal this

hole with insulating material so that no hot or cold air can
enter the back of the thermostat from the wall. This air
could cause a false thermostat reading.

LCD Display

Information LCD Display

Information

E1

Sensor error

E2

System switch error

352-00021-003 Rev A  8/07