American Standard ASYSTAT 340 User manual

OWNER’S GUIDE
Pub. No. 12-5026-01
Programmable Thermostat
ASYSTAT 340
69-1609

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FEATURES
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.
•Preprogrammed for your convenience.
FAN SYSTEM
Auto On Cool Off Heat
Hold Select
DECREASE KEY
:
DECREASE
TEMPERATURE
OR SCROLL
THROUGH
INSTALLER
SETUP OPTION
S.
SELECT KEY:
TO SET TIME
AND DAY.
INCREASE KEY:
INCREASE
SETPOINT,
OR ADVANCE
TO NEXT STEP.
HOLD KEY OVERRIDES PROGRAM
OR HOLDS TEMPERATURE INDEFINITELY.
LCD DISPLAY
FAN SWITCH SYSTEM SWITCH
TUE
PM
M2053
9

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Your thermostat displays the
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.
TEMPORARY SET
M18560
SET DISPLAYS WHILE
SETTING THE CLOCK.
D
URING NORMAL MODE, THE CURRENT PERIOD
D
ISPLAYS. DURING PROGRAMMING, THE PERIOD BEING
P
ROGRAMMED DISPLAYS (WAKE, LEAVE, RETURN OR SLEEP).
TEMPORARY DISPLAYS
DURING TEMPORARY
TEMPERATURE HOLD.
CURRENT DAY DISPLAYS IN
NORMAL MODE. MONDAY
THROUGH FRIDAY DISPLAY
DURING WEEKDAY
PROGRAMMING MODE.
SATURDAY AND SUNDAY
DISPLAY DURING WEEKEND
PROGRAMMING MODE.
CURRENT TIME DISPLAYS
I
N NORMAL MODE.
PERIOD START TIME DISPLAYS
I
N PROGRAMMING MODE.
CURRENT TEMPERATURE DISPLAYS.
HEATING OR COOLING SETPOINT
DISPLAYS DURING PROGRAMMING.
FLAME DISPLAYS DURING HEATING OR WHILE
P
ROGRAMMING HEATING SETPOINT; SNOWFLAKE DISPLAYS
D
URING COOLING OR WHILE PROGRAMMING COOLING SETPOINT.

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PROGRAMMING YOUR
THERMOSTAT
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.
Note: While setting the current time, SET
displays.
2. To set Day of Week, press Select
again. Press ▲or ▼to set current day.
3. Press Hold to exit the day and time
mode.
M12591
A
SET
PM
M1856
5
SET

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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.
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).

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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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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)
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.
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.
Period Start Time
Heating
Temperature
Cooling
Temperature
Wake
Leave
Return
Sleep

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Customizing Your Weekend Schedule
Use Table 3 to organize your weekend schedule. Fill in the times and temperatures you want to
program. The names of the four periods are filled in for you.
Table 3. Your Weekend Schedule.
Note: Start Time is the time your thermostat begins to reach the desired temperature.
Note: The thermostat cannot be set higher than 99°F (37°C) or lower than 50°F (10°C).
Period Start Time
Heating
Temperature
Cooling
Temperature
Wake
Leave
Return
Sleep

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Setting the Weekday Program
IMPORTANT
Always press the keys with your
fingertip or similar blunt tool. Sharp
objects like pen and pencil points will
damage the keyboard.
1. Slide the SYSTEM switch to the setting
you want to program (Heat or Cool).
Throughout programming, the thermo-
stat displays a flame (heating) or
snowflake (cooling) to help you
identify which mode you are program-
ming. At the end of Setting the Week-
end Program, you are prompted to
return to this step to program the
opposite mode. Example shows Cool
setting.
Note: To exit the programming mode at any
time, press Hold (the thermostat saves
your changes).
FAN SYSTEM
Auto On Cool Off Heat
Hold Select
TUE
PM
M20540