American Standard ACONT600AF11MA User manual

ACONT600AF11MA
Programmable Comfort Control
Installation Instructions
11-HD02D10-1

Product Application
This Comfort Control provides electronic control of 24 VAC single-stage heating
and cooling systems.
System Types
• Gas, oil or electric heat with
air conditioning
•Warm air, hot water, high-efficiency
furnaces, heat pumps
• Heat only with fan
• Cool only
Power
• Common wire only
• Common wire with battery backup
Changeover Options
• Selectable manual or
auto-changeover modes
System Settings
• Heat, Off, Cool,Auto
Fan Settings
• Auto, On
Must be installed by a trained, experienced technician
• Read these instructions carefully. Failure to follow these instructions can dam-
age the product or cause a hazardous condition.
• Check the ratings in this booklet to verify that this product is suitable for your
application (see page 12).
• Always test for proper operation after installation (see page 8).
CAUTION: ELECTRICAL HAZARD
Can cause electrical shock or equipment damage. Disconnect power before
beginning installation.
MERCURY NOTICE
If this product is replacing a control that contains mercury in a sealed tube, do not
place the old control in the trash. Contact your local waste management authority
for instructions regarding recycling and proper disposal.

1
Install the Comfort Control about 5 feet (1.5m) above the floor in
an area with good air circulation at average temperature.
Do not install in locations where the Comfort Control can be affected by:
• Drafts or dead spots behind doors and in corners
• Hot or cold air from ducts
• Sunlight or radiant heat from appliances
• Concealed pipes or chimneys
• Unheated/uncooled areas such as an outside wall behind the Comfort Control
NO
NO NO
Installation
Pre-installation checklist ................2
Wallplate installation ......................3
Wiring..............................................4
Wiring diagrams ..............................5
Power options ................................6
Comfort Control mounting ............6
Setup and testing
Installer setup..................................7
Installer system test ........................8
Explanation of features ..................9
Appendices
Quick reference to controls..........10
Quick reference to display............10
Battery replacement......................10
In case of difficulty ......................11
Accessories/replacement parts ....12
Specifications ................................12
Table of contents
Installation tips

2
Pre-installation checklist
Package contents
Check to make sure your package includes the following items:
Owner's Guide
Wall anchors and
mounting screws
(2 each)
AA alkaline
batteries (2)
Programmable
Comfort Control
(wallplate attached to back)
Required tools & supplies
¥No. 2 Phillips screwdriver
¥ Small pocket screwdriver
¥ Drill
¥Drill bit (3/16"for drywall,7/32" for plaster)
¥ Hammer
¥ Pencil
¥Electrical tape
¥ Level (optional)
Quick
reference
card

3
Remove the wallplate from the
Comfort Control as shown at left, then
follow directions below for mounting.
1 Insert quick reference card in slot
in back of Comfort Control.
2 Pull wires through wire hole.
3 Position wallplate on wall, level and
mark hole positions with pencil.
4 Drill holes at marked positions as
shown below, then tap in supplied
wall anchors.
5 Place wallplate over anchors, insert
and tighten mounting screws.
Insert finger into wire hole and pull to
remove wallplate from Comfort Control.
Drill 3/16” holes for drywall.
Drill 7/32” holes for plaster.
Wall anchors
Mounting screwsWire hole
Wallplate installation
Insert quick reference card

4
Wiring
1 Loosen screw terminals, insert
wires into terminal block, then
re-tighten screws.
2 Push excess wire back into the
wall opening. Keep wires in shaded
area as shown at left.
3 Plug the wall opening with non-
flammable insulation to prevent
drafts from affecting Comfort
Control operation.
Terminal Designations
GFan relay.
WOHeat relay or changeover valve
terminal for heat pumps.
BCommon wire from secondary side
of cooling system transformer.
YCompressor contactor.
R Heating power. Connect to
secondary side of heating
system transformer.
Rc Cooling power. Connect to
secondary side of cooling
system transformer.
Terminal
block
NOTES
R & Rc terminals
In single-transformer system, leave metal
jumper in place between R & Rc. Remove
metal jumper if two-transformer system.
B terminal
B is the common wire terminal.
W (O) terminal
If Comfort Control is configured for a heat
pump in the Installer Setup, changeover valve
is configured for cool (“O” factory setting).
Wire specifications
Use 18- to 22-gauge thermostat wire.
Shielded cable is not required.
Keep wires in this
shaded area
CAUTION: ELECTRICAL HAZARD. Can cause electrical shock or equipment damage.
Disconnect power before wiring.
Wiring

5
Typical 1H/1C system: 1 transformer Typical 1H/1C system: 2 transformers
Factory-installed jumper. Remove for 2-transformer systems only.
• Provide Power Supply disconnect means and overload protection as required.
• In Installer Setup, set system type to Heat Pump & changeover valve to 0.
Wiring diagrams
Typical 1H/1C heat pump system:
SINGLE STAGE GAS FURNACE – SINGLE STAGE COOLING
SINGLE STAGE
AIR CONDITIONER
SINGLE STAGE
GAS FURNACE
24VAC HOT
24VAC
600 COMFORT CONTROL
TERMINAL BLOCK
FAN
COOLING
HEATING
FACTORY INSTALLED JUMPER.
SINGLE STAGE OIL FURNACE – SINGLE STAGE COOLING
SINGLE STAGE
AIR CONDITIONER
SINGLE STAGE
OIL FURNACE
24VAC HOT
24VAC
600 COMFORT CONTROL
TERMINAL BLOCK
FAN
COOLING
HEATING
600 COMFORT CONTROL
TERMINAL BLOCK
HEAT PUMP – AIR HANDLER 1H/1C
HEAT PUMP
AIR HANDLER
24VAC HOT
24VAC
common
FAN
COOLING
SOV
FACTORY INSTALLED JUMPER.

6
AC Power
The Comfort Control must be
powered by 24 VAC power.
To wire the Comfort Control for AC
power, connect the common side of
the cooling transformer to the “B”
terminal as shown at left.
Important: Remove R/Rc jumper for
2-transformer systems only. (See wiring
diagram on page 5.)
Connect common
side of transformer
to “B” terminal
Install batteries in back of thermostat
(optional if AC powered).
Battery Backup Power
The Comfort Control can be powered
by backup batteries when used with
AC power.During power interruptions
the batteries will save time/day set-
tings and power the display.
After installation, batteries can be
changed without removing the
Comfort Control from the wall
(see page 10).
To Mount Comfort Control
Align the 4 tabs on the wallplate
with corresponding slots on the
back of the Comfort Control, then
push gently until the Comfort
Control snaps in place.
Jumper
Power options & mounting

Done Next
To begin, press and hold the and FAN
buttons until the display changes
7
1
3
5
9
12
13
14
15
16
27
28
31
System type
Fan control
(heating)
Heating cycle rate
(CPH: cycles/hour)
Compressor
cycle rate (CPH)
System setting
adjustment
Adaptive Intelligent
Recovery™
Temperature
display
Compressor
protection
Schedule format
Heat temperature
range stops
Cool temperature
range stops
Dehumidification
Control
0 Gas, oil or electric heat with air conditioning
1 Heat pump
2 Heat only (2-wire systems/power to open & close zone valves/
normally open zone valves)
3 Heat only with fan
4Cool only
0 Gas or oil furnace — equipment controls fan in heating
1 Electric furnace — Comfort Control controls fan in heating
5 For gas or oil furnaces of less than 90% efficiency
1 For steam or gravity systems
3 For hot water systems & furnaces of over 90% efficiency
9 For electric furnaces
[Other cycle rate options: 2, 4, 6, 7, 8, 10, 11 or 12 CPH]
3 Recommended for most compressors
[Other cycle rate options: 1, 2, 4, 5 or 6 CPH]
0 Manual changeover (Heat/Cool/Off)
1 Auto changeover (Heat/Cool/Auto/Off) **See page 10
2 Auto changeover only (Auto) **See page 10
1 On **See page 9
0 Off
0 Fahrenheit
1 Celsius
5 Five-minute compressor off time **See page 9
[Other options: 0, 1, 2, 3 or 4-minute off time]
0 5/2 (programmable weekdays and weekends)
1 5/1/1 (weekdays, Saturday & Sunday programmable)
90 Highest heating temperature setting
40-89 Heating temperature range (increments of 1°F, or 0.5°C)
60 Lowest cooling temperature setting
61-99 Cooling temperature range (increments of 1°F, or 0.5°C)
1 Cooling Droop
2Cooling Droop with Comfort-RTM (15 seconds Fan Delay)
3 Cooling Droop with Comfort-RTM (30 seconds Fan Delay)
0 None
Setup Function Settings & Options
Function
number
Press or to change settings
Press NEXT to advance to next function
Press DONE to exit and save settings
Setting
Installer setup
Follow the procedure below to configure the Comfort Control to match the
installed heating/cooling system, and customize feature operation as desired.

Done Next
8
To begin, press and hold the and
buttons until the display changes
System test
number
Press to turn on system
Press to turn off system
Press NEXT to advance to next test
Press DONE to terminate system test
System
status
10
30
40
70
Heating system
Cooling system
Fan system
Comfort Control
information
(for reference only)
0 Heat and fan turn off.
1 Heat turns on. Fan also turns on immediately if Function 1 or 3 is
set to “1” (see page 7).
0 Compressor and fan turn off.
1 Compressor and fan turn on.
0 Fan turns off.
1 Fan turns on.
71 Software revision number (major revisions)
72 Software revision number (minor revisions)
73 Configuration identification code (major)
74 Configuration identification code (minor)
75 Production configuration date code (week)
76 Production configuration date code (year)
System Test System Status
Installer system test
CAUTION: EQUIPMENT DAMAGE HAZARD
Compressor protection (minimum off time) is bypassed during testing. To prevent
equipment damage, avoid cycling the compressor quickly.
Follow the procedure below to test the heating, cooling and fan.

Set Clock/Day/
Schedule
9
Auto Changeover (Setup Function 12)
Auto Changeover is a feature used in
climates where both air conditioning and
heating are used on the same day.When the
system is set to Auto, the Comfort Control
automatically selects heating or cooling
depending on the indoor temperature.
Heat and cool settings must be at least 3
degrees apart.The Comfort Control will
automatically adjust settings to maintain this
3-degree separation (called “deadband”).
The 3-degree separation between heating
and cooling set temperatures is fixed, and
cannot be changed.
Built-in compressor protection (Setup Function 15)
This feature helps prevent damage to the
compressor in your air conditioning or heat
pump system.
Damage can occur if the compressor is re-
started too soon after shutdown.This feature
forces the compressor to wait for a few
minutes before restarting.
During the wait time, the message Cool On
or Heat On (heat pumps only) will flash on
the display.When the safe wait time has
elapsed, the message stops flashing and the
compressor turns on.
Message flashes until safe
restart time has elapsed
Adaptive Intelligent Recovery™ (Setup Function 13)
Adaptive Intelligent Recovery eliminates guesswork when setting your schedule. It
allows the Comfort Control to “learn” how long your furnace and air conditioner
take to reach the temperature you want.
Just set your program schedule to the time you want the house to reach your
desired temperature.The Comfort Control then turns on the heating or cooling at
just the right time to reach your scheduled temperature at your scheduled time.
For example: Set the Wake time to 6 am, and the temperature to 70°.The heat will
come on before6 am, so the temperature is 70° by the time you wake at 6.

10
Quick reference to controls
Digital display screen Battery holder (see page 6)
Temperature buttons
Press to adjust temperature
settings
Hold button
Press to override programmed
temperature control
Function buttons
Press to select the function displayed just above each button.
(Functions change depending on the task.)
Quick reference to display screen
Current inside temperature Low battery warning Current time/day
Current program period
Wake/Leave/Return/Sleep
Temperature setting
System status
On when “calling” for
heating or cooling;
flashes when waiting for
compressor restart.
System setting
(Heat/Cool/Auto/Off)
Fan setting
(Auto/On)
Function buttons
Press the button beneath each function to view or change
settings. (Functions change depending on the task.)
Battery replacement
Press and pull to remove Insert fresh AA
alkaline batteries,
then reinstall
battery holder
Set Clock/Day/Schedule
Press to set time, day or
program schedules.

11
In case of difficulty
If you have difficulty with your Comfort Control, please try the suggestions below.
Most problems can be corrected quickly and easily.
Display is blank • Check circuit breaker and reset if necessary.
• Make sure power switch at heating & cooling system is on.
• Make sure furnace door is closed securely.
Temperature
settings do not
change
Make sure heating and cooling temperatures are set to acceptable ranges:
• Heat: 40° to 90°F (4.5° to 32°C).
• Cool: 60° to 99°F (16° to 37°C).
Heating system
does not respond
(“Heat On”
appears on
screen)
• Check for 24 VAC at the equipment on the secondary side of the trans-
former between power and common. If voltage is not present, check the
heating equipment to find the cause of the problem.
• Check for 24 VAC between the heat terminal (W) and the transformer
common. If 24 VAC is present, the Comfort Control is functional. Check
the heating equipment to find the cause of the problem.
• Check for loose or broken wires between the Comfort Control and the
heating equipment.
Cooling system
does not respond
(“Cool On”
appears on
screen)
• Check for 24 VAC at the equipment on the secondary side of the trans-
former between power and common. If voltage is not present, check the
cooling equipment to find the cause of the problem
• Check for 24 VAC between the cooling terminal (Y) and the transformer
common. If 24 VAC is present, the Comfort Control is functional. Check
the cooling system to find the cause of the problem.
• Check for loose or broken wires between the Comfort Control and the
cooling equipment.
Fan does not
turn on in a call
for heat
• Check Installer Setup, Function 3 (Fan Control), to make sure the fan con-
trol is properly set to match the type of system (see page 7).
Heat/cool both on
at same time, or
heat does not
turn off
•Check Installer Setup, Function 1 (System Type), to make sure it is set to
match the installed heating/cooling equipment (see page 7).
• Check to make sure heating and cooling wires are not shorted together.

In case of difficulty
“Cool On” or
“Heat On”
is flashing
•Compressor protection timeout is engaged. Wait 5 minutes for the
system to restart safely, without damage to the compressor.
Heating equip-
ment is running
in cool mode
• Check Installer Setup, Function 1 (System Type), to make sure it is set to
match the installed heating/cooling equipment (see page 7).
Cannot change
system setting
to “Heat”
• Check Installer Setup, Function 1 (System Type), to make sure it is set to
match the installed heating equipment (see page 7).
• Change Installer Setup, Function 12 (System Setting) to Manual or Auto
Changeover (see page 7).
Cannot change
system setting
to “Cool”
• Check Installer Setup, Function 1 (System Type), to make sure it is set to
match the installed cooling equipment (see page 7).
• Change Installer Setup, Function 12 (System Setting) to Manual or Auto
Changeover (see page 7).
“Heat On” is not
displayed
• Change the System Setting to Heat, and set the temperature level above
the current room temperature.
“Cool On” is not
displayed
•Change the System Setting to Cool, and set the temperature level below
the current room temperature.
Accessories & replacement parts
Please contact your distributor to order replacement parts.
Battery holder........................................................Part Number THT02506
Cover plate assembly ..........................................Part Number BAYCOVR700A
(Use to cover marks left by old thermostats.)
Specifications
Temperature Ranges
• Heat: 40° to 90°F (4.5° to 32°C)
• Cool: 60° to 99°F (16° to 37°C)
Operating Ambient Temperature
•32°to 120°F (0° to 48.9°C)
Shipping Temperature
• -20° to 120°F (-28.9° to 48.9°C)
Operating Relative Humidity
•5% to 90% (non-condensing)
Physical Dimensions
• 3-9/16” H x 5-13/16” W x 1-1/2” D
•91 mm H x 147 mm W x 38 mm D
Electrical Ratings
Terminal Voltage (50/60Hz) Running Current
W (O) Heating 20-30 VAC 0.02-1.0 A
Y Cooling 20-30 VAC 0.02-1.0 A
G Fan 20-30 VAC 0.02-0.5 A
12

Pub.No.11-HD02D10-1 07/06
6200 Troup Highway
Tyler, TX 75711-9010
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©2006American Standard All rights reserved