Honeywell RTH2520 User Manual [es]

RTH2520
Programmable Thermostat
Installation and User Guide
1. Introduction
The RTH2520 programmable thermostat can be used to control:
• 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-
o Identify and label each wire (with the corresponding letter on
the wire terminal) and remove them from the terminals.
p If necessary, strip the end of each wire (maximum of 1/4 inch). q Wrap the wires around a pencil to prevent
them from falling into the wall.
r If the hole in the wall is too big, insulate it
using a non-flammable material in order to avoid air draughts behind the thermostat.
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 chim­neys.
Display
System operating mode selector
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
• 7-day programming including:
- Preprogrammed energy-saving schedule
- Early Start
- Temporary bypass
- Time display (12 h or 24 h)
• Filter replacement indicator
• Automatic daylight savings changeover
• Interchangeable faceplates (titanium, charcoal & taupe)
Fan operating mode selector
Adjustment buttons
Programming buttons
Backlight button
2. Installation
2.1 Removing the Old Thermostat
IN ORDER TO AVOID ANY RISK OF ELECTRIC SHOCK, CUT POWER TO THE HEATING/COOLING SYSTEM.
n Remove the old thermostat to access the wires.
Warning: If the old thermostat was mounted onto an electrical box,
it was probably powered by 120/240 volts. In this case, this thermo­stat cannot be used.
n Remove the thermostat faceplate. o Loosen the locking screw in order to separate the thermostat
from its baseplate (the screw cannot be completely removed).
p Gently tilt the thermostat upwards. q Mark and bore the appropriate mounting holes (using a 3/16”
drill bit) or use the existing holes. Insert the plastic anchors.
r Pass 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.
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
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.
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2.3.1 2-wire Heating
2.3.2 2-wire Cooling
2.3.3 3-wire Heating
2.3.4 3-wire Cooling
Jumper
Jumper
Jumper
Jumper
Heat relay
Cool relay
Heat relay
Fan relay
2.4 Setting JP2 Jumper
The jumper specifies how the fan will operate when it is placed in automatic mode (see sec­tion 3.2).
Leave the jumper in this position if you
HG
have a gas or oil heating system. Move the jumper to this position if you
HE
have an electric heating system.
JP2 jumper
2.5 Installing the Batteries
n Gently pull out the battery cover. o Install the batteries as shown. Observe the polarity. p Reinstall the battery cover. You will hear a clicking sound.
After the batteries are installed, the thermostat performs a sequence of tests for approximately 5 seconds.
Afterwards, the screen displays the actual temperature. It is normal that the displayed temperature be higher than the ambient temperature if you are holding the thermo­stat. Once installed on the wall, the thermostat will display the ambi­ent temperature. By default, the setpoint is 70°F (21°C).
The time and day settings flash to indicate that they must be set (see section 5.1).
Cool relay
Fan relay
2.3.5 4-wire Heating and Cooling
Jumper
Heat relay
Cool relay
Fan relay
2.3.6 5-wire Heating and Cooling
Fan relay
Heat relay
Note: Remove the red jumper wire between terminals Rc and Rh.
Cool relay
2.6 Completing the Installation
n Once the baseplate and the batteries are installed, mount the
thermostat on the baseplate.
o Secure the thermostat using the locking screw and install the
faceplate.
p Apply power back to the system.
3. Basic Functions
3.1 System Operating Mode
Use this selector switch to place the system in Heat­ing mode (HEAT) or Cooling mode (COOL), or to set both modes to 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 during the delay.
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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 in a 2-wire installation
as the fan is not connected to the thermostat in this type of installation.
AUTO
The fan operates only when the heating or cooling sys­tem is On (typical setting).
The fan operates continuously. Use this setting to
ON
improve air circulation and air cleaning.
3.3 Displaying the Temperature
The actual temperature is normally displayed. To view the setpoint, press once on one of the buttons. The setpoint is displayed for 5 seconds along with the icon.
Note: Pressing either 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 dis­played.
3.5 Backlight
The display illuminates for 12 seconds when the backlight button or either of the buttons is pressed.
3.6 Thermostat Control Mode
3.6.1 Manual/Permanent Hold Mode
Maintains the temperature at a fixed setpoint. To place the thermo­stat in this mode, press [ Mode ]. The house icon will disappear.
3.6.2 Programmable Mode
Maintains the temperature according to the energy-saving sched­ule. To place the thermostat in this mode, press [ Mode ]. The cur­rent period will be displayed. The four possible periods are:
Wake up Leave for work Return home Sleep
To see the default program settings, see section 5.3.
Temporary Bypass
If you modify the setpoint (using the buttons) when the thermo­stat is in Programmable mode, the thermostat will use the new set­point for the next 2 hours. The house icon flashes during the bypass. Afterwards the thermostat will return to the temperature set­ting of the period currently underway.
3.7 Filter Replacement Indicator
After 500 hours of operation, an icon appears to indi­cate that the filter needs replacement. Once the filter is replaced, press [Filter] for 3 seconds to remove the icon and reset the counter.
3.8 Battery Replacement Indicator
Install fresh batteries immediately when the icon starts flashing. The icon flashes for 120 days before the bat­teries are depleted. You should replace batteries once a year or before leaving home for more than a month even if the icon has not appeared.
After replacing the batteries, set the time, day and date (see sec­tions 5.1 and 5.2). However, the temperature and program 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.
4. Configuration Menu
DISPLAY DESCRIPTION DEFAULT OPTIONS
Temperature display °F °C or °F
Time display 12 h 12 h or 24 h
Early start
Automatic daylight savings changeover
Heating cycles per hour
Cooling cycles per hour
1
When Early Start is On, the thermostat determines when to start heating or cooling
so that the desired temperature is reached at the set time.
2
When this function is On, the thermostat automatically switches to daylight savings time on the second Sunday of March and to normal time on the first Sunday of November (see section 5.2).
3
Use the Heat/Cool selector switch to switch between the heating parameter and the cooling parameter.
4
For optimal heating control, use the setting that matches your system as follows: 2=30 min (steam, gravity), 3=20 min (hot water, 90%+ high-efficiency furnace), 4=15 min (gas or oil), 5=12 min (alternate setting for gas or oil), 6=10 min (electric).
5
The corresponding cooling cycle lengths are: 2=30 min., 3=20 min., 4=15 min., 5=12 min., 6=10 min.
1
2
3
3
Off On or Off
Off On or Off
4
2, 3, 4, 5 or 6
4
2, 3, 4, 5 or 6
4
5
n To access the configuration menu, press the backlight button
for 3 seconds.
o To go to the next parameter (menu item), briefly press the back-
light button.
p To modify a parameter, press . q Repeat steps 2 and 3 if necessary. r Press the backlight button for 3 seconds to exit the configura-
tion menu.
5. Programming
5.1 Setting the Time and Day
n Press [ Clk ]. The hour flashes. o Set the hour using . p Press [ Clk ]. The minutes flash. q Set the minutes using . r Press [ Clk ]. The day flashes. s Set the day using . (MO: Monday, TU: Tuesday,
WE: Wednesday, TH: Thursday, FR: Friday, SA: Saturday and SU: Sunday).
t Press [ Exit ] to exit.
5.2 Setting the Date
The date is needed for automatic daylight savings changeover.
n Press [ Clk ] for 3 seconds to display the year.
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