American Standard 340 User Manual

Programmable Thermostat

ASYSTAT 340

OWNER’S GUIDE

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FEATURES

:

S.

9

American Standard sells comfort systems.
Comfort is achieved through matching the
correct equipment and controls. This
thermostat is designed to provide the
maximum comfort for your needs.
Some of the basic offerings are:

• Program up to four time periods and
temperature settings to complement
your lifestyle.

• Set different schedules for weekdays
and weekends.

• Programs are permanently held in
memory in the event of a power failure.

• Indefinite temperature hold.

HOLD KEY OVERRIDES PROGRAM
OR HOLDS TEMPERATURE INDEFINITELY.

LCD DISPLAY

PM

E

U

T

FAN SYSTEM

Auto On

FAN SWITCH

Hold Select

Cool Off Heat

INCREASE KEY:
INCREASE
SETPOINT,
OR ADVANCE
TO NEXT STEP.

SELECT KEY:
TO SET TIME
AND DAY.

DECREASE KEY
DECREASE
TEMPERATURE
OR SCROLL
THROUGH
INSTALLER
SETUP OPTION

SYSTEM SWITCH

M2053

• Preprogrammed for your convenience.

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Your thermostat displays the

D
D
P

I
I

P
D

current day, time, period,
temperature and system ( for
heating and for cooling) in
normal mode. In programming
mode, only the setting or
settings being programmed
display. For example “SAT SUN”
(Saturday Sunday) displays
while programming the
weekend schedule.

SET DISPLAYS WHILE
SETTING THE CLOCK.

CURRENT TIME DISPLAYS

N NORMAL MODE.

PERIOD START TIME DISPLAYS

N PROGRAMMING MODE.

CURRENT DAY DISPLAYS IN
NORMAL MODE. MONDAY
THROUGH FRIDAY DISPLAY
DURING WEEKDAY
PROGRAMMING MODE.

SATURDAY AND SUNDAY

DISPLAY DURING WEEKEND
PROGRAMMING MODE.

URING NORMAL MODE, THE CURRENT PERIOD
ISPLAYS. DURING PROGRAMMING, THE PERIOD BEING
ROGRAMMED DISPLAYS (WAKE, LEAVE, RETURN OR SLEEP).

FLAME DISPLAYS DURING HEATING OR WHILE

ROGRAMMING HEATING SETPOINT; SNOWFLAKE DISPLAYS
URING COOLING OR WHILE PROGRAMMING COOLING SETPOINT.

CURRENT TEMPERATURE DISPLAYS.
HEATING OR COOLING SETPOINT
DISPLAYS DURING PROGRAMMING.

TEMPORARY DISPLAYS
DURING TEMPORARY
TEMPERATURE HOLD.

TEMPORARY

SET

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M18560

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PROGRAMMING YOUR

A

5

THERMOSTAT

SET

PM

CLOCK

Setting the Current Day and Time

To set or reset the current day and time,
follow these instructions:

IMPORTANT

Always press the keys with your
fingertip or similar blunt tool. Sharp
objects like pen and pencil points will
damage the keyboard.

Note: To exit and save the time and day

setting at any time, press Hold.

1. To set Current Time, press Select twice.

Press ▲ or ▼ to set current time.

M12591

Note: While setting the current time, SET

displays.

2. To set Day of Week, press Select

again. Press ▲ or ▼ to set current day.

SET

M1856

3. Press Hold to exit the day and time
mode.

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Organizing Your Schedule

Your thermostat can be set for four time periods (Wake, Leave, Return, and Sleep) for the
weekday schedule (Monday through Friday), and four time periods for the weekend schedule
(Saturday and Sunday). Without additional programming, your thermostat follows the same
preprogrammed schedule for both weekdays and weekends (see Table 1).

WAKE Choose the time you want your heating or cooling system to start to

reach your comfort temperature after the SLEEP period.

How? Consider the time required to reach your comfort level. Adjust the
Wake time to earlier when you know it will take the system longer to
reach your comfort temperature.

LEAVE Choose the time you want your heating or cooling system to start an

energy-saving mode while you are away at work or school.

How? Set the Leave temperature lower during heating season, and
higher during cooling season.

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RETURN Choose the time you want your heating or cooling system to start to

reach your comfort temperature after the energy-savings LEAVE
period.

How? Consider the time required to reach your comfort level. Adjust the
Return time to earlier when you know it will take the system longer to
reach your comfort temperature.

SLEEP Set the time you want your heating or cooling system to start to reach

your Sleep temperature.

To use this period as an energy-savings mode, set the temperature
lower during heating season, and higher during cooling season.

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The preprogrammed schedule is shown in Table 1. You may keep this schedule or organize your
own. Schedules are adjustable as often as you wish. If you decide to keep this schedule, no
further programming is necessary.

Table 1. Preprogrammed Weekday and Weekend Schedule.

Period Time Heat Setpoint Cool Setpoint

Wake 6:00 AM 70°F (21°C) 78 °F (26 °C)

Leave 8:00 AM 62°F (17 °C) 85°F (29 °C)

Return 5:00 PM 70°F (21°C) 78 °F (26 °C)

Sleep 10:00 PM 62°F (17°C) 75 °F (24 °C)

To begin programming your weekday and weekend schedules, fill in Tables 2 and 3.

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Customizing Your Weekday Schedule

Use Table 2 to organize your weekday schedule. Fill in the times and temperatures you want to
program. The names of the four periods are filled in for you.

Table 2. Your Weekday Schedule.

Wake

Leave

Return

Sleep

Period

Start Time

Temperature

8

Heating

Cooling

Temperature

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