Honeywell RTH1120 Manual
Honeywell
Thermostat
RTH1120
Read below 📖 the manual in Italian for Honeywell RTH1120 (8 pages) in the Thermostat category. This guide has been helpful for 4 people and has been rated 4.5 stars on average by 2 users
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RTH1120 69-1875EF 22/2/06 1/4
The RTH110B non-programmable thermostat can be used to con-
trol:
• a gas, fuel oil or electric furnace - 2 or 3 wires
• a central air conditioner - 2 or 3 wires
• a hot water system with or without pump - 2 wires
• a millivolt system - 2 wires
• a central heating and cooling system - 4 or 5 wires
Note: This thermostat is not compatible with heat pumps or multi-
stage systems.
Features
• System operating mode selection: heat, cool or off
• Fan operating mode selection: automatic or on (continuous)
• Programmable heating and cooling cycle lengths: 10, 12, 15, 20
or 30 minutes
• Temperature display in °F or °C
• Backlit display
• Battery replacement indicator
• Interchangeable faceplates (titanium, charcoal & taupe)
2.1 Removing the Old Thermostat
IN ORDER TO AVOID ANY RISK OF ELECTRIC SHOCK, CUT
POWER TO THE HEATING SYSTEM.
nRemove the old thermostat to access the wires.
Attention: If the old thermostat was mounted onto an electrical box,
it was probably powered by 120/240 volts. In this case, this thermo-
stat cannot be used.
oIdentify and label each wire (with the corresponding letter on
the wire terminal) and remove them from the terminals.
pIf necessary, strip the end of each wire (maximum of 1/4 inch).
qWrap the wires around a pencil to prevent
them from falling into the wall.
rIf the hole in the wall is too big, insulate it
using a non-flammable material in order
to avoid air draughts behind the thermo-
stat.
2.2 Installing the New Baseplate
For a new installation, choose a location approximately 5 feet
(1.5 m) above the floor and on an inside wall. Avoid draughty
areas (top of staircase, air outlet, etc.), dead air spots (behind
doors), direct sunlight or areas near concealed pipes or chim-
neys.
nRemove the thermostat faceplate.
oLoosen the locking screw to separate the thermostat from its
baseplate (the screw cannot be completely removed).
pTilt the thermostat upwards.
qMark and bore the appropriate mounting holes (using a 3/16”
drill bit) or use the existing holes. Insert the plastic anchors.
rPass the wires through the opening of the baseplate and fix the
baseplate to the wall using the screws provided.
2.3 Connecting the Thermostat
Refer to the following table for matching the wire labels with the
thermostat terminals.
Note: Do not connect wires identified as C, X or B. Wrap the bare
end of these wires with electrical tape.
Important: The red jumper wire between Rh and Rc terminals must
be removed in a 5-wire installation.
1. Introduction
2. Installation
RTH1120
Non-programmable Electronic Thermostat
Installation and User Guide
Display Adjustment
buttons
System operating
mode selector Fan operating
mode selector
Backlight
button
RTH2520 terminals Description Wire labels
Rh Heating power supply Rh, R, 4, V
Rc Cooling power supply Rc, R
W Heating signal W, W1, H
Y Cooling signal Y, Y1, M
GFan G, F
RTH1120 69-1875EF 22/2/06 2/4
2.3.1 2-wire Heating
2.3.2 2-wire Cooling
2.3.3 3-wire Heating
2.3.4 3-wire Cooling
2.3.5 4-wire Heating and Cooling
2.3.6 5-wire Heating and Cooling
Note: Remove the red jumper wire between terminals Rc and Rh.
2.4 Setting J2 Jumper
The jumper specifies how the fan will operate
when it is placed in automatic mode (see sec-
tion 3.2).
2.5 Installing the Batteries
nPull out the battery cover.
oInstall the batteries as shown. Observe the polarity.
pReinstall the battery cover. You will hear a clicking sound.
After the batteries are installed, the thermostat performs a series of
tests for approximately 5 seconds.
Afterwards, the screen displays the actual tempera-
ture. It is normal that the displayed temperature will
be higher than the ambient temperature if you hold
the thermostat in your hands. It will display the
ambient temperature after the thermostat is
installed on the wall. By default, the setpoint is 70°F (21°C).
2.6 Completing the Installation
nOnce the baseplate and the batteries are installed, mount the
thermostat on the baseplate.
oSecure the thermostat using the locking screw and install the
faceplate.
pApply power back to the system.
Heat relay
Cool relay
Fan relay
Heat relay
Cool relay
Fan relay
Heat relay
Cool relay
Fan relay
Fan relay
Cool relay
Heat relay
HG Leave the jumper in this position if you
have a gas or oil heating system.
HE Move the jumper to this position if you
have an electric heating system.
JP2 jumper
RTH1120 69-1875EF 22/2/06 3/4
3.1 System Operating Mode
Use the selector switch to place the system in Heating
mode (HEAT) or Cooling mode (COOL), or to turn the
system off.
Note: When you place the thermostat in Cooling mode, you might
need to wait up to five minutes before cooling can start. This is a
safety feature for the compressor. will flash on the screen until
cooling can start again.
3.2 Fan Operating Mode
Use the selector switch to set the fan to automatic
mode (AUTO) or continuous mode (ON).
Note: This switch is not used if you have a 2-wire
installation as the fan is not connected to the thermo-
stat.
3.3 Displaying the Temperature
The actual temperature is normally displayed. To view the setpoint,
press once on either of the buttons. The setpoint is displayed
for 5 seconds along with the icon.
Note: Pressing any of the buttons more than once will change
the setpoint.
3.4 Setting the Temperature
Press one of the buttons until the desired temperature is dis-
played.
3.5 Backlight
The display illuminates for 12 seconds when the backlight button or
either of the buttons is pressed.
3.6 Battery Replacement Indicator
An icon appears when the batteries need replacement.
This icon will flash for 120 days, then the thermostat
will cut power to the heating/cooling unit. The icon dis-
appears once the batteries are replaced. The tempera-
ture settings are saved and do not need to be re-entered.
Warning: Before removing the batteries, place the
system switch on the thermostat to Off. Otherwise, the
heating/cooling unit might still be running even after
the batteries are removed.
nTo access the configuration menu, press the backlight button
for 3 seconds.
oTo go to the next parameter (menu item), briefly press the back-
light button.
pTo modify a parameter, press .
qRepeat steps 2 and 3 if necessary.
rPress the backlight button for 3 seconds to exit the configura-
tion menu.
Power supply: 2 AA batteries
Maximum load: 1 A @ 24 Vac per output
Setpoint range (heating): 41 to 82°F (5 to 28°C)
Setpoint range (cooling): 59 to 95°F (15 to 35°C)
Display range: 23 to 122°F (-5 to 50°C)
Storage temperature: -2 to 122°F (-20 to 50°C)
Temperature display resolution: 1°F (0.5°C)
Accuracy: ± 1°F (0.5°C)
Heating/cooling cycle lengths: 10, 12, 15, 20 or 30 minutes (pro-
grammable)
Compressor short-cycle protection (minimum off time): 5 minutes
Data memory: non-volatile
Dimensions: 5 in. x 3 in. x 1 in. (127 mm x 75 mm x 28 mm)
3. Basic Functions
AUTO The fan operates only when the heating or cooling sys-
tem is On (typical setting).
ON The fan operates continuously. Use this setting to
improve air circulation and air cleaning.
4. Configuration Menu
DISPLAY DESCRIPTION DEFAULT SETTINGS
Temperature
display °F °C or °F
Heating cycles
per hour 142, 3, 4, 5 or 6 2
Cooling cycles
per hour 142, 3, 4, 5 or 6 3
1 When either the heating or cooling parameter is displayed, use
the system mode selector switch to alternate between the two
parameters.
2 For optimal heating control, use the setting that matches your
system as follows: 2=30 min (steam or gravity), 3=20 min (hot
water or 90%+ high-efficiency furnace),
4=15 min (gas or oil), 5=12 min (alternate setting for gas or oil),
6=10 min (electric).
3 The corresponding cooling cycle lengths are as follows: 2=30
min, 3=20 min, 4=15 min, 5=12 min, 6=10 min.
5. Technical Specifications
Printed in China
Product Specifications
| Brand: | Honeywell |
| Category: | Thermostat |
| Model: | RTH1120 |
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