Manual de uso Honeywell RTH221 Termostato

Manual de uso

RTH221 69-2062EFS 5/6/07 1/6

1.1 Controls

1.2 Display screen

1.3 Setting the clock

n

Press the Set button. The message Set Time will

appear on the screen and the time display will flash.

o Press the  or  button to set the time.

p Press the Run button to save the changes & exit.

(The changes are also saved if you do not press any

button for 60 seconds.)

NOTE: The clock has lost its settings when the time display flashes. If

the thermostat is following the programmed schedule, it will use the

temperature settings programmed for the Wake period until you re-

adjust the clock.

1.4 System switch

Use the System switch to place the system in one of the following

modes.

• Cool: System is in Cooling mode.

• Off: System is off.

• Heat: System is in Heating mode.

CAUTION: EQUIPMENT DAMAGE HAZARD

Do not use Cooling mode when the outdoor temperature

is below 50 °F (10 °C).

1.5 Fan switch

Use the Fan switch to select the fan operation.

• Auto: The fan runs only when heating or cooling is actually taking

place (commonly used setting).

• On: The fan runs continuously. Use this setting for improved air

circulation or for more efficient air cleaning.

1.6 Temperature setting

Press the  or  button once to display the setpoint temperature.

Press either button more than once to change the setpoint.

The ambient (measured) temperature is normally displayed. To view

the setpoint temperature, press either of the temperature adjustment

buttons once. The setpoint temperature will appear for five seconds.

1.7 Built-in compressor protection

Your thermostat has a feature that helps prevent damage to the

compressor of your air conditioning system. Because damage can

occur if the compressor is restarted too soon after shutdown, this

feature forces the compressor to wait five minutes before restarting.

During the wait time, the message Cool On flashes on the screen.

When the safe wait time has elapsed, the message stops flashing

and the compressor turns on.

2.1 Using the schedule

Press the Run button to follow the programmed schedule. You can

have up to four periods in one day. Each period can be programmed

with a different temperature setting.

To program a period, you need to set its start time and its two

temperature settings (one when the thermostat is in cooling mode

and another one when it is in heating mode). The same period and

settings are repeated every day.

For maximum energy savings without sacrificing comfort, you can

program the schedule such that the temperature is at an economical

level when you sleep or are away during the day and at a comfortable

level when you are awake and at home.

2.2 Factory settings

n

Operation

1.

System switch

Fan switch

Temperature

adjustment buttons

Press to run (follow)

programmed schedule

Press to override schedule

and hold temperature

Press to set clock

or schedule

Temperature

Setpoint indicator

Appears when the setpoint

temperature is displayed.

Clock

Schedule period

Temporary schedule override

Permanent

schedule override

1

When Cool On is flashing, this means the compressor protection is engaged

(see section 1.7).

System status

• Cool On: Cooling is

activated.

1

• Heat On: Heating is

activated.

Low-battery warning

o

Programmed schedule

2.

Wake Morning temperature

Leave Daytime temperature

Return Evening temperature

Sleep Night temperature

Period Start time Heat Cool

Wake 6:00 a.m. 70 °F (21 °C) 75 °F (24 °C)

Leave 8:00 a.m. 62 °F (16.5 °C) 83 °F (28.5 °C)

Return 6:00 p.m. 70 °F (21 °C) 75 °F (24 °C)

Sleep 10:00 p.m. 62 °F (16.5 °C) 78 °F (25.5 °C)

RTH221

User Guide

Programmable Thermostat

400-631-002-A (RTH221 User 69-2062EFS).book Page 1 Tuesday, June 5, 2007 2:23 PM

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