American Standard ASYSTAT656 Operation Manual

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OPERATION GUIDE

ASYSTAT656

Programmable Electronic

Set-Back Thermostat for

Single and Multistage

Heatpumps

Homeowner: Save this booklet for future use!

12-5014-02

About Your New Thermostat . . .

Your new American-Standard Digital Multi-stage/Heat Pump Thermostat uses the technology of a solid-state microcomputer to provide precise comfort. This thermostat offers you the flexibility to design heating and cooling programs that fit your needs.

Please read this manual thoroughly BEFORE operating or programming your thermostat. If you have questions, write to us at the address shown on the back cover of this manual.

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In This Guide . . .

YOUR NEW THERMOSTAT'S

 

PROGRAMMING YOUR

 

FEATURES .............................................

4

THERMOSTAT .....................................

18

OPERATING YOUR THERMOSTAT ..........

5

PLANNING FOR YOUR NEEDS

 

PARTS OF THE THERMOSTAT

 

ENTERING YOUR PROGRAM

 

The Back Of the Thermostat Body

 

Set Current Time and Day

 

The Display

 

Enter Heating Program

 

The Thermostat Buttons

 

Enter Cooling Program

 

OPERATING FEATURES

 

CHECK YOUR PROGRAMMING

 

 

 

QUESTIONS AND ANSWERS .................

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YOUR NEW THERMOSTAT’S FEATURES

Separate 5-day (weekday) and 2-day (weekend) setback programming

Simultaneous heat and cool program storage

Four separate time/temperature settings per 24-hour period

Computed Energy Management Recovery (EMR)

Automatic changeover (operator-selectable)

Armchair programming capability

Backlit LCD displays continuous set point, time, and room temperature

9 volt alkaline battery backup

Preprogrammed temperature control

Electric Heat (installer-selectable)

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Compressor short cycle protection

Programmable blower control

Blower delay OFF in the cooling cycle

Audio and visual prompting during operation

Two hour temperature override

Manual program override (HOLD temperature)

"Advance Program" button

°F/°C convertibility

Temperature range 40° to 99°F

Adjustable cycle times

Backlit LCD displays continuous setpoint, time, and room temperature

Up to 3 stages of heat (electric heat and 2 heat pump) and up to 2 stages of cool

OPERATING YOUR THERMOSTAT

Before you begin programming your thermostat, you should be familiar with its features and with the display and the location and operation of the thermostat buttons. The information in this section will help you become familiar with your new thermostat so that you can easily program it.

Your thermostat consists of two parts: the thermostat body and the subbase.

! CAUTION

Disconnect power from the system at the circuit breaker/fuse box BEFORE removing or attaching the thermostat body. Equipment damage and/or personal injury could occur.

The subbase is attached to the wall, but you can remove the thermostat body for easy programming. To remove the thermostat body from the subbase, grasp the thermostat body and gently pull it out from the bottom of the subbase, then pivot up. To attach the thermostat body, line up the four terminal pins on the lower section of the thermostat back with the matching connector on the subbase. Insert these, then gently pivot the thermostat body up to connect the nine pin

connectors on the upper portion of the thermostat back. Gently push until the snap connectors engage. DO NOT FORCE OR PRY THE THERMOSTAT, as this may damage the unit.

PARTS OF THE THERMOSTAT

The Back of The Thermostat Body

Turn the thermostat body over. On the back is the 9 volt alkaline battery and the option switches. See INSTALLERS GUIDE for option switch operation.

1.The 9 volt alkaline battery provides power to the thermostat when the 24VAC power is interrupted (for example, when you remove the thermostat from the wall for programming). A fresh battery will maintain the stored program for approximately one week.

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If power loss is long enough for the program to be lost, the thermostat will automatically return to the factory programmed temperatures (64°F heating and 82°F cooling) when power is restored. You must reprogram the thermostat if this happens.

If the word BAT is flashing in the display window, the battery is low and should be replaced with a fresh 9 volt alkaline battery. The battery will provide power for all functions except the display light which works only on 24VAC power.

! CAUTION

Before removing thermostat from the wall to replace the batteries, DISCONNECT 24VAC power from the thermostat at the breaker/ fuse box. Backlight will not come on when 24VAC power has been disconnected.

2.You may adjust the option switch #4 for automatic changeover from heat to cool (see OPERATING FEATURES).

Other than and , the buttons are located behind the thermostat door. To open the door, put your fingernail in the indentation at the top of the door, then pull the door out from the top and swing it down on its hinges.

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On the following pages are brief descriptions of the display and the thermostat buttons.

BACK OF THERMOSTAT BODY

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The Display

1

Continuously displays system mode (HEAT,

5

The word BAT flashes on the display when

the 9V alkaline battery is weak and should

 

OFF, EMER, COOL, AUTO, HOLD). Dur-

 

 

ing programming, the program period is

 

be replaced.

 

displayed (MOR, DAY, EVE, or

NHT).

6

FAN

 

is displayed when the blower is

 

 

 

 

 

 

 

Alternately displays room temperature (F

operating continuously, REGARDLESS OF

2

 

denotes degrees Fahrenheit and

C denotes

HEATING OR COOLING SYSTEM CY-

 

 

degrees Celsius) and time of day (A de-

 

CLING. FAN is displayed during auto-

 

notes AM time and P denotes PM time).

 

matic fan operation (when the blower cycles

3

Displays the setpoint temperature.

 

with the heating or cooling system).

 

 

 

 

4

5 DAY indicates that the displayed program

is the weekday program. 2 DAY indicates

 

 

that the displayed program is the weekend

 

program.

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American Standard ASYSTAT656 Operation Manual

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The Thermostat Buttons

7Sets the system mode (HEATing, EMERgency backup, OFF, COOLing, or AUTOmatic changeover).

8Selects fan operation (see #6, above). This button is also used to program the fan to run continuously during a program period.

9Runs display forward or backward through time, day, or anticipation settings during programming.

10Used with the TIMEFWD and BACKTIME buttons to set current time and day of the week.

11Used during programming to set the day of the week.

12Used to initiate or review thermostat programming.

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13Used to start program operation after programming. Also used to return thermostat to program operation after being in HOLD mode.

14Used to manually override programming to hold at a selected temperature (when HOLD is displayed).

15Used to advance thermostat program to the next program period (for example, from the MOR program to the DAY program).

16(Red arrow) Raises temperature setting (99°F or 37°C maximum).

17(Blue arrow) Lowers temperature setting (40°F or 4°C minimum).

18Red EM.HT. light indicates the system is in the emergency mode (the heat pump compressor is off and the auxiliary system

is maintaining setpoint temperature - there is a 5 to 10 minute startup delay on the first emergency cycle). A continuous (non-flashing) GREEN STG 1 light indicates that the heat pump compressor is functioning - a flashing GREEN light indicates

that the compressor is locked out. An AMBER STG 2 light indicates that the second stage is operating. A flashing AMBER STG 2 light indicates that the third stage heat is operating. A flashing RED light indicates a defrost fault.

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