Comfort Sync A97USMV User manual

11/12 507064−01
*2P1112* *P507064-01*
© 2012
ALLIED AIR ENTERPRISES
215 METROPOLITAN DR.
WEST COLUMBIA, SC 29170
indoor temperature
indoor humidity is 41%
fan is
OFF
fan is
AUTO
cool−to
set temp
75
heat to
72
heat
or
cool
fan is
AUTO
away
mode
outdoor
temperature
80
system is cooling
?
9:39 am Aug 15, 2012
Wi−Fi
THIS MANUAL MUST BE LEFT WITH THE HOMEOWNER
FOR FUTURE REFERENCE
NOTICE
Read this manual before programming this thermostat.
Use this thermostat only as described in this manual.
INSTALLER’S SYSTEM SETUP
GUIDE
Comfort SyncThermostat
Touch Screen Programmable Communicating Thermostat
CONTROLS
507064−01
11/12
Supersedes 09/12
Comfort Sync−Enabled Units
A97USMV A97DSMV A80US2V A80DS2V
4SCU18LS 4SHP18LS 4SCU16LS 4SHP16LS
BCS2M_S
Shipping and Packing List
1 − Comfort Syncthermostat
4 − Mounting Screws
4 − Wall Anchors
1 − Installation Quick-Start Guide
1 − Installer’s System Setup Guide
1 − Homeowner’s Manual
1 − Warranty card

507064−01 11/12 Page 2
Table of Contents Page
Technical Description/Features 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation and Setup 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Settings screen 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Change settings (dealer info, daylight savings, fan circulate) 5. . . . . . . . . . .
Table 1. System settings defaults and ranges 6. . . . . . . . . . . . . . . . . . . . . . .
Set Time and Date 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Add or Remove Non−communicating equipment 9. . . . . . . . . . . . . . . . . .
Maintenance Timers 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outdoor Unit 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Humidifier 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dehumidifier 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjust a setting screen 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configure Humidifier 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configure Dehumidifier (Aux. Dehum. installed) 16. . . . . . . . . . . . . . . . . .
Configure Dehumidification (no dehumidifier installed) 17. . . . . . . . . . . . . .
Humidification and Dehumidification Modeshow they work 18. . . . . . . . . . .
Use the Test Features 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Set up Equipment Parameters 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Use the Diagnostic Features 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
View and Clear Alerts 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Enable Wi−Fi from User Home Screen 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Register the Comfort Syncthermostat 25. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Personal Computer account registration to Comfort Syncserver 26. . . . . .
Access Installer Program from User Home Screen 28. . . . . . . . . . . . . . . . . . .
Reconfigure a System 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stage Delay Timers & Differentials 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Smooth Setback Recovery (SSR) 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heat Pump, Dual Fuel and Balance Points 32. . . . . . . . . . . . . . . . . . . . . . . . . .
Gas Heat Control Mode 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 2. Variable Capacity Furnace Operation 35. . . . . . . . . . . . . . . . . . . . . . .
Table 3. Adjustable Parameters (Installer) 37. . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 4. Adjustable Parameters (User) 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 5. Alert Codes and Troubleshooting 45. . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 6. Troubleshooting Tips 55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring Diagrams 59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermostat wire termination in communicating system 63. . . . . . . . . . . . . . . .
Setting up typical Comfort Sync systems
Indoor Unit Outdoor Unit page
Comfort Sync−enabled
furnace
Comfort Sync−enabled AC 65
non−communicating AC 66
Comfort Sync−enabled
furnace (dual fuel)
Comfort Sync−enabled HP 67
non−communicating HP not supported
Comfort Sync−enabled
air handler
Comfort Sync−enabled AC 68
non−communicating AC 69
Comfort Sync−enabled
air handler
Comfort Sync−enabled HP 70
non−communicating HP 71
CAUTION
This is a 24VAC Class 2 thermostat. Do not install on voltages higher than
30VAC.
Do not switch system to cool if the outdoor temperature is below 45°F
(7°C). This can damage the cooling system.
WARNING
Electric shock hazard.
Always turn off power at the main power source by switching the circuit
breaker to the OFF position before installing or removing this thermostat.
All wiring must conform to local and national building and electrical
codes and ordinances.
Revision History
07−2012 Preliminary release (draft)
09−2012 3rd draft

Comfort Sync7−Day Programmable Communicating Thermostat
Page 3
Comfort Sync Thermostat − Technical Description and Features
The 24VAC Comfort Syncthermostat (figure 1) is an electronic communi-
cating, color display touchscreen, 7−day programmable thermostat. It stores
system parameters and settings in nonvolatile memory (i.e., it retains data
when electrical power fails or is turned off). It is designed for 4−wire connec-
tion to other communication devices as listed in figure 1.
The Comfort Sync thermostat can connect to online services via the internet
through the homeowner’s Wi−Fi access point. After online registration is
completed, the system may then be accessed by the homeowner from any-
where using a remote internet connection via computer or personal commu-
nicating device.
Thermostat
connections
RSBus
Minimum wire
size is 18 gauge
Comfort Sync−enabled Furnace Control
Comfort Sync−enabled Air Handler Control
Comfort Sync−enabled Outdoor Unit Control
External Sensors − outdoor temperature, discharge air
Humidify Control
Dehumidify Control
R i+ i− C
Maximum total length of all
connections on the RSBus is
limited to 1500 ft. (450 m).
Max. length between compo-
nents is 300 ft. (90 m).
Note: Comfort
Syncthermo-
stat does not
require
shielded cable
wiring.
RED GREEN WHITE YELLOW
Figure 1. Comfort Sync system
BEST PRACTICES! Keep all communication wiring as far away from house
electrical wiring and large electrical appliances as possible (15’ [5m] recom-
mended).
The thermostat also:
supports three languages (English, French, Spanish),
supports air conditioning units or heat pump units with up to four stages
of heat / two stages of compressor operation (2 stages of heat pump
heating, 2 stages of auxiliary back−up heating, 2 stages of emergency
heating),
supports Indoor Air Quality with time-based notification of consum-
ables including media filters, UVC bulbs, and humidifier pads service
/ replacement,
supports variable−capacity / multi−stage heat/cool, universal compati-
bility (gas/electric/heat pump/ac), and is dual fuel capable (Comfort
Sync−enabled HP only) with two balance points.
Important
Connections to non−communicating outdoor units and accessories are de-
scribed in the Quick−Start Installation guide. (Wiring diagrams are also
shown beginning on Page 59 of this manual.)
Supports
Humidification Measurement and Control,
Dew Point Adjustment Control
Dehumidification Measurement and Control
Auxiliary Dehumidifier
Multi-Stage HVAC Systems
Equipment Maintenance Reminders
Autochangeover Mode −− Permits control of heating, cooling, humidifi-
cation, and dehumidification without user involvement.
Outdoor Temperature Sensor (option)
Communicating outdoor units contain a built−in outdoor temperature sensor.

507064−01 11/12 Page 4
Installation and Setup
IMPORTANT! When determining the location for the W−Fi thermostat, be
sure it is in an area near enough to the homeowner’s Wi−Fi router to ensure
good communications signal between the thermostat and the router. (Hint:
use a smart phone with Wi−Fi to find and determine signal strength.)
Refer to the Quick Start Guide for information about installing the thermostat
on a wall and for wiring diagrams for field wiring the thermostat to the system
using one of a number of possible configurations. (Wiring diagrams are also
shown beginning on Page 59 of this manual.)
NOTE − If electric heat strips are used with an Comfort Sync−enabled air han-
dler, the strips MUST be configured on the air handler control (AHC) board
before beginning the discovery" sequence below.
After all wiring connections are made, apply power to the system. 24VAC will
power up the thermostat.
After power is applied to the thermostat for the first time, the processor
checks the system for installed communicating devices, the screen display
changes then is followed by Use this thermostat?" screen.
Touch press here to continue. During the setup
process, alerts may pop open to provide the in-
staller with information that affects the setup.
Correct the cause of any such alerts prior to
continuing setup.
System settings (figure 2) appear first. As you use the up/down arrows to
scroll through the settings, the right hand side will show the current value.
For example, current value: 9:39 am Aug 15, 2012 shows the current date
for Time and Date.
system settings To adjust a setting, highlight it, then
press edit
9:39 am Aug 15, 2012
next
back
current value:
Time and Date
Daylight Saving Time
Circulate Fan ON Time
System Name
Dealer Name
Dealer Address
Dealer Phone
Dealer Email
Dealer Website
9:39 am Aug 15, 2012
edit
Figure 2. System settings" screen
Use this Thermostat?
press here

Comfort Sync7−Day Programmable Communicating Thermostat
Page 5
Change settings
If you want to change a setting, use one of the Settings change tools shown
in figure 3. (Also, see Set time and date on Page 7.) After changes have
been made, use save to store the changed data or cancel to exit the screen
and return to the list of settings.
Circulate Fan ON Time Range
is 15 to 50 %
Default is 35, inc: 1
cancelsave
set−to
45%
up/down arrows radio buttons
Not Installed 1 Stage A/C Unit
2 Stage A/C Unit 1 Stage HP Unit
2 Stage HP Unit
Select one
Outdoor Unit Type
cancelsave
Dealer Name
keyboard tool
Figure 3. Settings change tools

507064−01 11/12 Page 6
Circulate fan ON time setting
NOTE − If the circulate fan mode is on, a timer is set to measure all the time
that the fan is blowing, regardless if it is running to deliver heating or cooling
or just for circulation.
Circulate" is enabled on the user’s home screen or system settings page.
It keeps air circulating from 15% to 50% percent of time. The following set-
tings approximate how long the fan will run at these typical settings:
15% (9 minutes fan run time per hour)
25% (15 minutes fan run time per hour)
35% (21 minutes fan run time per hour)
45% (27 minutes fan run time per hour).
Table 1 shows the range/condition and defaults for the system settings and
indicates the tools used to make changes.
Table 1. System setting defaults and range
system
setting
range/
condition
default use
Time and Date see Page 7
Daylight Saving
Time Enabled/Disabled Enabled
Circulate Fan
ON Time
15 to 50% (in 1%
increments) 35%
System Name (alpha−numeric
characters) use keyboard tool to change
Dealer Name
(alpha−numeric
characters)
your dealer

1−800−448−5872


use keyboard
tool to change
Dealer Address
Dealer Phone
Dealer Email
Dealer Website

Comfort Sync7−Day Programmable Communicating Thermostat
Page 7
Set time and date
Use the arrows to select Time and Date; press edit (see figure 4) to proceed
to the Set current time and date" screen (figure 5).
system settings To adjust a setting, highlight it, then
press Edit
9:39 am Aug 15, 2012
edit
nextback
current value:
9:39 am Aug 15, 2012
Time and Date
Daylight Saving Time
Circulate Fan ON Time
System Name
Dealer Name
Dealer Address
Dealer Phone
Dealer Email
Dealer Website
Figure 4. View/edit time and date
When Time and Date" screen (figure 5) appears, enter the correct date as
follows:
Use the left and right arrows to change the month and year.
Touch a day of the month to select it.
Press on the hour or minute; up down arrows appear to allow change.
Touch the am/pm field to toggle it between am and pm.
When the correct date and time is set, press save to save settings and
return to previous settings screen.
Touch next to continue to next screen.
SMTWTFS
January 2012
system settings
1234567
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28
29 30 31 save
09 : 39 am
9:39 am Aug 15, 2012
Figure 5. Set current time and date

507064−01 11/12 Page 8
Use about" screen & access Add or Remove Non−communicating equipment" screen
The about" screen shows details of discovered installed equipment.
From the system devices" screen, use arrow buttons to scroll to a device; then press the about button. Use the up/down arrows to scroll through and view
additional information about the selected device. When finished viewing, press the back button.
Press next to advance to the Add or Remove Non−communicating equipment?" screen.
device feature list
Furnace
device description
Equipment Type Name
Furnace
back
Language Support
Equipment Type Name
Unit Model Number
Unit Serial Number
Unit Nominal Capacity
Number of Heating Stages
Heating Capacity by Stage
Indoor Blower CFM Range
Control Software Revision
Control Model Number
(returns to
system
devices
screen)
about
back next
9:39 am Aug 15, 2012
press ’about’ for
more information on
a highlighted device
System
Heat Pump
Furnace
Thermostat
system devices
system devices yes
System
Heat Pump
Furnace
Thermostat
If no, press Next
Step.
Add or Remove
Non−communi-
cating equip-
ment?
back next
Figure 6. About" & Add or Remove Non−communicating equipment" screens

Comfort Sync7−Day Programmable Communicating Thermostat
Page 9
Add or Remove Non−communicating equipment
Figure 6 (previous page) shows how to access the Add or Remove Non−
communicating equipment" screen.
Adding Non−Communicating Outdoor unitSee figure 7 for details
for adding/removing an outdoor unit.
Adding HumidifierThe procedures in figure 8 describe adding a non−
communicating humidifier which will be controlled by the Comfort Sync
thermostat through the H" or HUM" terminals on the furnace or air handler.
Adding DehumidifierThe procedures in figure 9 describe adding a
non−communicating dehumidifier controlled by the Comfort Syncthermo-
stat through the DH" output on the furnace or air handler.
NOTICE
For details about how the humidification and dehumidification
modes operate and how to configure those modes, see additional in-
formation beginning on Page 18.
HUMIDITY CONTROL TIPS
The standard humidification mode is Basic" (humidifier is energized
during a call for heat, if there is a humidification demand).
Sensed outdoor temperature, required for some features, is provided
from one of the following sources:
Adownloaded via Wi−Fi when available (primary source),
Bsensor furnished with Comfort Sync−enabled outdoor units,
Cseparate outdoor sensor connected to the furnace or air handler
outdoor sensor" connections.
NOTE − If no source for outdoor temperature is present, Basic and
Precision Dew Point Control" modes are not available.
If you do not have the ability to select or adjust the Humidity RH set-
point on the Indoor Humidity" button, the control is set for Display
Only." In the installer program, go the equipment button and select
System" and press the edit button. Select Humidification Control
Mode" and press edit. Choose Basic," Precision," Basic Dew Point
Control" or Precision Dew Point Control" and press save.
Adding non−communicating accessoriesAdding maintenance
timer reminders to accessories is a simple process of installing" the device,
which effectively tells the thermostat to activate access to its service timers.
Timers are available for two (2) filters, Humidifier pad and UV bulb mainte-
nance.

507064−01 11/12 Page 10
Add Non−Communicating Outdoor unit
System Devices Add or Remove
Non−communicating
equipment?
yes
nextback
1
non−communicating device list
Not Installed
current value:
back
edit
Not Installed 1 Stage A/C Unit
2 Stage A/C Unit 1 Stage HP Unit
2 Stage HP Unit
Select one
Outdoor Unit Type
cancelsave
To add (or remove) an outdoor unit that is not Comfort Sync−enabled, you must be
at the Add or Remove Non−communicating equipment?" screen.
1. Press the yes button on this screen (see 1).
2. In the non−communicating device list" screen, use the arrows (2a) to
highlight Outdoor Unit Type and press edit (2b).
3. Touch one of the radio buttons (3a) to select a 1−or 2−Stage AC Unit or a
1−or 2−Stage HP Unit; press save (3b).
4. Use arrows (4a) to highlight any red colored text in the device list (e.g.
select Outdoor Unit Capacity; text turns white). Press edit (4b).
5. Use arrows (5a) to make changes; press save (5b). Change other red
settings (if present) using a similar process.
NOTE − If the defaults are correct, you do not have to make any changes, but you
must press save (5b). When all red text is gone, the back button will appear; press
it to return to the Add or Remove Non−communicating equipment?" screen (1).
3b
3a
to add/remove/adjust a device,
select it, then press edit
current value:
non−communicating device list
edit
to add/remove/adjust a device,
select it, then press edit
back
please view and save all
red settings
9:39 am Aug 15, 2012
2 Stage AC Unit
4a
4b
2a 2b
Outdoor Unit Type
Outdoor Unit Capacity
Outdoor Unit 1st Stage Capacity
Humidifier
Dehumidifier
Outdoor Unit Type
Humidifier
Dehumidifier
System
Furnace
Outdoor Unit Capacity
Range is 18 to 60
Default is 36, inc:1
cancelsave
set−to
36
5b
5a
Figure 7. Add non−communicating deviceOUTDOOR UNIT

Comfort Sync7−Day Programmable Communicating Thermostat
Page 11
Add (or Remove) Humidifier (skip if no humidifier is being used)
NOTE − Adding humidity regulating non−communicating devices may be a 2−step procedure:
1st, the device must be installed (this page; after the humidifier is installed, the operation
mode defaults to Basic").
2nd, (if you want another mode, i.e. Precision, Basic Dew Point, or Precision Dew Point,
the device requires further configuration (see Page 15).
To add (or remove) a humidifier,:
1. Press the yes button on this screen (see 1).
2. In the non−communicating device list" screen, use the arrows (2a) to highlight
Humidifier (note the current value, Not Installed) and press edit (2b).
3. Touch one of the radio buttons (3a) to select the type of humidifier (or select Not
Installed, if removing humidifier); press save (3b).
4. The previous screen returns, but the current value now shows your selection (4a).
Press the back (4b) button.
5. The Add or Remove..." screen reappears with your addition shown in the system
devices list (5a). At this point, you may add more equipment (press yes) or if
finished, press the next (5b) button to advance to the Adjust a setting..." screen
(see page 15).
6. (If you want other than the default Basic" mode of operation) Configure the
humidifier as described on Page 15.
nextback
Before adding a humidifier, be sure that:
the humidifier is wired to the furnace or air handler control as shown on the Optional
Accessories wiring diagram (see Page 61),
the entire system is wired, powered up, and the thermostat has detected the system’s
installed communicating devices, and you are at the Add or Remove Non−communi-
cating equipment?" screen (see figure 6, Page 8).
system devices
System
Heat Pump
Furnace
Thermostat
yes
edit
to add/remove/adjust a device,
select it, then press edit
Not Installed
current value:
non−communicating device list
2a
Humidifier
Dehumidifier
Electronic Air Cleaner
1
Add or Remove Non−
communicating
equipment?
Select one Humidifier
cancelsave
3b
(available with furnace equipped systems only)
2b
Not Installed Bypass (24VAC) Humidifier
Power (120VAC) Humidifier Bypass and Power Humidifier
edit
to add/remove/adjust a device,
select it, then press edit
Bypass (24VAC) Humidifier
current value:
non−communicating device list
Humidifier
Dehumidifier
Electronic Air Cleaner
back
5a
system devices
9:39 am Aug 15, 2012
nextback
yes
Add or Remove Non−
communicating
equipment?
4a
4b
System
Heat Pump
Furnace
Thermostat
Bypass (24VAC) Humidifier
5b
3a
Figure 8. Add or remove non−communicating deviceHUMIDIFIER

507064−01 11/12 Page 12
Add (or Remove) Auxiliary Dehumidifier (skip if no dehumidifying device is being used)
Before adding a dehumidifier, be sure that:
the dehumidifier is wired to the furnace or air handler control as shown on the Option-
al Accessories wiring diagram (see Page 61),
the entire system is wired, powered up, and the thermostat has detected the sys-
tem’s installed communicating devices, and you are at the Add or Remove Non−
communicating equipment?" screen (see figure 6, Page 8).
Add or Remove
Non−communicating
equipment?
If ’no’, press Next Step
yes
nextback
edit
to add/remove/adjust a device,
select it, then press edit
Not Installed
current value:
non−communicating device list
NOTE − Adding humidity regulating non−communicating devices may be a 2−step procedure:
1st, the device must be installed (this page; after the dehumidifier is installed, the opera-
tion mode defaults to Basic").
2nd, set the min/max dehumidification setpoints if desired (see Page 16).
To add (or remove) a dehumidifier, you must be at the Add or Remove Non−communicating
equipment?" screen.
1. Press the yes button on this screen (see 1).
2. In the non−communicating device list" screen, use the arrows (2a) to highlight
Dehumidifier and press edit (2b). Note the current value (e.g. Not Installed).
3. Touch one of the radio buttons (3a) to select the type of dehumidifier (or select Not
Installed, if removing dehumidifier); press save (3b).
4. When you scroll to the Dehumidifier device (4a), (Note the current value, e.g. Aux.
Dehumidifier.) Click back (4b)to return to the Add or Remove..." screen (1).
5. The Add or Remove..." screen reappears with your addition shown in the system
devices list (5a). At this point, you may add more equipment (press yes) or if
finished, press the next button (5b) to advance to the Adjust a setting..." screen
(see Page 13).
NoteBy default, the minimum dehumidification setpoint of 40% RH. If these settings are
satisfactory, no further configuration is necessary. If another setting is needed, change set-
point as described on Page 16.
1
2b
Not Installed Auxiliary Dehumidifier
Select one
Dehumidifier
cancelsave 3b
3a
system devices
System
Furnace
Humidifier
Dehumidifier
Electronic Air Cleaner
edit
to add/remove/adjust a device,
select it, then press edit
Aux. Dehumidifier
current value:
non−communicating device list
Humidifier
Dehumidifier
Electronic Air Cleaner
back
5a
system devices
nextback
yes
Add or Remove Non−
communicating
equipment?
System
Heat Pump
Furnace
Thermostat
Aux. Dehumidifier
4a
4b
2a
5b
Figure 9. Add or remove non−communicating deviceDEHUMIDIFIER

Comfort Sync7−Day Programmable Communicating Thermostat
Page 13
Adjust a setting screen (communicating devices)
Use arrows to select a device from the system devices" list; then use the about button to view information (shown on Page 8) about communicating
devices (information about other devices is not available).
Use resetAll button to un−install all non−communicating devices that were added through Add or Remove..." screen and to reset any device settings made
through this Adjust a setting..." screen to the factory defaults. (While editing a communicating device, the reset button is limited to only the selected device.
You are asked to confirm (shown in figure 10) before resetting all.
Use this screen to access communicating devices’ settings (pressing buttons numbered from 1to 6in figure 10 for an example of changing heating airflow;
more examples are shown on the next page). Use back to return to the previous screen or next to go on. A complete list of parameters, their defaults and
setting ranges, begins on page 37.
Low Heating Airflow
Range is 325 to 450
Default is 400, inc:25
set−to
325
cancelsave
system devices
Furnace
edit
about
next
resetAll
back
To adjust a setting,
highlight it, then press
Edit
System
Furnace
Thermostat
2 Stage HP Unit
Power (120VAC) Humidifier
Aux. Dehumidifier
system devices
current value:
reset
back
Equipment Name
Heating Airflow Control Type
Low Heating Airflow
High Heating Airflow
High Cooling Airflow
Airflow Profile − Cooling
High HP Airflow
Continuous Indoor Blower Airflow
Low Heating Airflow
325
edit
1
2
3
4
5
6
resetting a device to its factory default
(resetting ALL devices to their factory default)
settings will cause the system to restart the
setup process.
To continue, press CONFIRM or press CANCEL
confirm
(if resetAll
is pressed)
cancel
Figure 10. Adjust communicating device screens

507064−01 11/12 Page 14
Use the up/down arrows to scroll through the device’s settings. The current setting will be displayed on the right−hand side of the screen (figure 11). For
example, current value: disabled. Press edit if you want to modify that setting, or press back to return to the previous screen.
Available settings for the devices depend on the installed components. Shown below is an example of enabling and changing the balance point control from
default (Disabled) to Enabled. After selecting Enabled, press save to save the changes and return to the previous screen.
The returning screen may appear with the message in red please view and save all red settings." In the example in figure 12, note that two additional items are
listed in red. Use the arrows to scroll and highlight each item appearing in red. Press edit, make any desired changes, and press save.
When all affected settings have been edited/saved, the red message disappears. Press back to return to the To adjust a setting..." screen.
If no more adjustments are necessary, press next to advance to the select tests to run" screen (see Page 19).
System
current value
edit
reset
back
Balance Point Control
Disabled
Staged Delay Timers
2nd Stage Delay
3rd Stage Delay
Balance Point Control
Humidification Control Mode
Min Dehumidification Setpoint
OK/Humid Boundary
Disabled Enabled
Select one
Balance Point Control
cancelsave
Figure 11. Accessing device to modify
Staged Delay Timers
2nd Stage Delay
3rd Stage Delay
Lock In 2nd stage HP by Outdoor Temp
Balance Point Control
High Balance Point
Low Balance Point
Humidification Control Mode
Min Dehumidification Setpoint
System
current value
edit
reset
back
Balance Point Control
Enabled
please view and save all
red settings
High Balance Point
Range is −17 to 75
Default is 0, inc:1
cancelsave
set−to
50
Figure 12. Modify device settings
A97MV Furnace Note:
If your Comfort Syncthermostat is being used with a n A97MV furnace and is set to variable−capacity mode of operation (the Comfort Sync default with these
units), the thermostat’s settings for stage timers are ignored (even if shown enabled in the thermostat). The stage timer will be used on the cooling side. The
furnace software sets and controls the firing rates. The only other controlling factor is the stage temperature differentials. In Load−Tracking Variable Capacity
(default for these furnaces), both stage timers and temperature differentials are ignored.

Comfort Sync7−Day Programmable Communicating Thermostat
Page 15
Adjust a setting... Configure Humidifier (skip if no humidifier is being used or if humidifier is being used and default
Basic" humidification mode is desired)
System Devices
edit
about
To adjust a setting, highlight it,
then press Edit
System
resetAll
next
back
1a
1b
edit
reset
Humidification Control Mode
current value:
back
Basic
Pre−adjustment REQUIREMENTS:
1st, the device has been installed (see Page 11).
2nd, you pressed next at the Add or Remove..." screen (see Page 11).
Configure the device as follows:
1. In the system devices" list, use the arrows (1a) to highlight System. Press edit (1b).
2. In the System" list, use the arrows (2a) to highlight Humidification Control Mode.
The current value defaults to Basic mode. Press edit (2b).
3. Touch one of the radio buttons (3a) to select the mode of humidification control;
press save (3b). (After saving, check that the current value now shows the new
selection).
4. Use arrows (4a) to highlight any red colored text in the list (e.g. select Max Humidifi-
cation Setpoint). Press edit (4b).
5. Use arrows (5a) to make changes; press save (5b). Repeat for other red settings.
You will not be able to advance to the next step until all red settings have been
removed..
6. Press the back button to return to Adjust a setting..." screen.
NOTE − If the defaults for the settings shown in red, you are not required to make any changes,
but you must go into the edit tool, and press save (5b). When all red text is gone, the back button
will appear; press it to return to the Adjust a setting..." screen.
Display Only Basic
Precision Basic Dew Point Control
Precision Dew Point
Select one Humidification Control Mode
cancelsave 3b
3a
edit
reset
back
Max Humidification Setpoint
current value:
45
9:39 am Aug 15, 2012
please view and save all
red settings
2a
2b
System
1st Stage Differential
2nd Stage Differential
Staged Delay Timers
2nd Stage Delay
Dehumidification Control Mode
Humidification Control Mode
Max Humidification Setpoint
OK/Humid Boundary
Outdoor Temperature Reading
System
Air Conditioner
Furnace
Thermostat
Power (120VAC) Humidifier
System
2nd Stage Differential
Staged Delay Timers
2nd Stage Delay
Dehumidification Control Mode
Humidification Control Mode
Max Humidification Setpoint
Range is 15 to 45
Default is 45, inc:1
cancelsave
set−to
45
5b
5a
(returns to
adjust a
setting
screen)
4b
4a
Figure 13. Adjust a non−communicating device settingHUMIDIFIER

507064−01 11/12 Page 16
Adjust a setting... Configure Auxiliary Dehumidifier
edit
about
To adjust a setting,
highlight it,
then press Edit
System
reinstall
Pre−adjustment REQUIREMENTS:
1st, the device has been installed (see Page 12).
2nd, from the Add or Remove Non−communicating equipment?", press next.
3rd, in the Adjust a setting..." screen, configure the device as follows:
1. In the system devices" list, use the arrows (1a) to highlight System. Press
edit (1b).
2. Use arrows (2a) to highlight Min Dehumidification Setpoint; press edit
(2b). Note the current value (e.g. 45).
3. Use arrows (3a) to make changes; press save (3b). (After saving, check
that the current value now shows the new selection).
4. Press the back button to return to Adjust a setting..." screen.
1a 1b
system devices
System
Air Conditioner
Furnace
Thermostat
Aux. Dehumidifier
edit
reset
back
Dehumidification Control Mode
current value:
45
9:39 am Aug 15, 2012
2a 2b
System
Staged Delay TImers
2nd Stage Delay
3rd Stage Delay
4th Stage Delay
Lock In 2nd Stage HP by Outdoor Temp
Balance Point Control
Min Dehumidification Setpoint
OD/Humid Boundary
Outdoor Temperature Reading Calibr
resetAll
4
Min Dehumidification Setpoint
Range is 40 to 60
Default is 45, inc:1
cancelsave
set−to
42 3a
3b
(returns to
adjust a
setting
screen)
Figure 14. Adjust a non−communicating device settingDEHUMIDIFIER

Comfort Sync7−Day Programmable Communicating Thermostat
Page 17
Adjust a setting... Configure Dehumidification (no dehumidifying device installed)
(skip if default Basic" dehumidification mode is desired)
edit
about
To adjust a setting, highlight it,
then press Edit
reinstall
next
back
edit
reset
Dehumidification Control Mode
current value:
back
Display Only
Display Only Basic
Precision
Select one Dehumidification Control Mode
cancelsave
3b
3a
edit
reset
back
Dehumidification Control Mode
current value:
Precision
9:39 am Aug 15, 2012
please view and save all
red settings
Pre−adjustment REQUIREMENTS:
1st, NO physical dehumidification device has been installed.
2nd, configure the thermostat for dehumidification as follows:
1. In the system devices" list, use the arrows (1a) to highlight System.
Press edit (1b).
2. In the System" list, use the arrows (2a) to highlight Dehumidification
Control Mode. The current value defaults to Display Only. Press edit
(2b).
3. Touch one of the radio buttons (3a) to select the mode of dehumidification
control; press save (3b).
4. Use arrows (4a) to highlight any red colored text in the list (e.g. select Min
Dehumidification Setpoint). Press edit (4b).
5. Use arrows (5a) to make changes; press save (5b). Change other red
settings (e.g. Auto Changeover − Humidif. Deadband) using a similar
process.
6. Press the back button to return to Adjust a setting..." screen.
NOTE − If the defaults are correct, you do not have to make any changes, but you
must press save (5b). When all red text is gone, the back button will appear; press it
to return to the Add or Remove Non−communicating equipment?" screen.
1a
1b
2a 2b
4a 4b
System
Staged Delay Timers
Balance Point Control
Dehumidification Control Mode
Humidification Control Mode
Auto Changeover − Humidif. Deadband
Max Humidification Setpoint
Min Dehumidification Setpoint
OK/Humid Boundary
Outdoor Temperature Reading
System Devices
System
Furnace
Thermostat
2 Stage AC Unit
Power (120VAC) Humidifier
System
2nd Stage Differential
Staged Delay Timers
2nd Stage Delay
Dehumidification Control Mode
Humidification Control Mode
OK/Humid Boundary
Outdoor Temperature Reading
System
Min Dehumidification Setpoint
Range is 40 to 60
Default is 45, inc:1
cancelsave
set−to
45 5a
5b
4
Figure 15. Adjust dehumidification when not using an auxiliary dehumidifier

507064−01 11/12 Page 18
Humidification and Dehumidification Modeshow they work
HUMIDIFICATION modes
BASIC & PRECISIONThese modes allow user control of RH between 15
and 45%. These conditions must be met for either mode to operate:
humidification mode has been enabled, and
the unit is in HEAT mode, and
humidification demand exists (24V present at H), and
BASIC mode also requires presence of heating demand [Y for HP
heat, or W for gas heat (W may be energized with G de−energized)].
DEW POINT(Available only if Wi−Fi is operational or outdoor sensor is at-
tached)
Basic Dew Point ControlBasic Dew Point Control adjustment mode will
change the humidification setpoint based on the outdoor temperature and a
user−defined dew point adjustment setting.
Precision Dew Point ControlPrecision Dew Point Control adjustment
mode will operate when these conditions are met:
humidification mode has been enabled, and
the unit is in HEAT mode, and
humidification demand exists (24V present at H).
DEHUMIDIFICATION modes
NOTE − Basic and Precision dehumidification modes are functions of the
HVAC system with NO external dehumidification devices installed. Auxiliary
Dehumidifiers do not use these modes.
In BASIC mode, dehumidification occurs if these conditions are met and sig-
nals are present at specific terminals:
dehumidification has been enabled on installer settings, and
the unit is in COOL mode, and
dehumidification demand exists (RH above setpoint), and
cooling demand exists (Y1 energized).
In PRECISION mode, dehumidification occurs if all BASIC conditions are
true, except cooling demand may or may not be present. Also note that:
Maximum overcool from cooling setpoint is 2ºF.
Deadband temperature is limited to 5ºF. (instead of 3ºF in BASIC or
DISPLAY ONLY mode) because of 2ºF overcooling.
Auxiliary Dehumidifier mode requires:
NOTE − Systems using Comfort Sync and a dehumidifier − Dehum" jumper
on furnace/air handler control does not need to be cut when using with a
Comfort Synctthermostat.
Wi−Fi is operational or outdoor sensor is installed and set up
dehumidification has been enabled on installer settings, and
the unit is in COOL mode, (or if in AUTO, at least one thermostat cool-
ing call made prior to the dehumidification demand), and
a dehumidification demand exists (RH above setpoint), and
outdoor temp. below 95°F; indoor temp. above 65°F, and
Auxiliary Dehumidifier NOTE
When an auxiliary dehumidifier is used, dehumidification will be allowed un-
der the following conditions, provided there is NO call for humidification:
In the absence of heating or cooling calls, or
Simultaneous with blower only calls.
If the blower is required to operate while the auxiliary dehumidifier is running,
a separate wire must be installed from the auxiliary dehumidifier to the indoor
unit’s G thermostat input that will energize G when the auxiliary dehumidifier
is running (see wiring diagram on Page 61).
Auxiliary dehumidification is controlled by the thermostat dehumidification
demand.
NOTE − Refer to the Auxiliary Dehumidifier Installation Instructions for instal-
lation recommendations.

Comfort Sync7−Day Programmable Communicating Thermostat
Page 19
Use the Tests / Diagnostics features
NOTE − Test mode lasts for 30 minutes (with the temperature updating every
30 seconds) except for the defrost test, which lasts 30 seconds. Tests fea-
ture provides the technician time to manually verify the equipment operation.
The tests feature is available after setup has been completed once. After
you press next in the final setup screen, the select tests to run" screen (fig-
ure 17) will appear. (If you want you may skip tests; press skip tests.)
If you re−select the tests button from the full option screen (figure 16), a mes-
sage to press Start button below to begin system testing" appears. Press
start. The resulting screen will be identical to figure 17.
9:39 am Aug 15, 2012 EXIT
equipment diagnostics
tests alertssetup
press start button below to begin system testing
back
start
Figure 16. Start testing screen
To run all of the tests, press select all. All boxes in the list of tests will be
checked. Or, touch box(es) next to test(s) to run certain tests.
After the tests have been started, the screen will describe which test is run-
ning and shows a diagnostic summary of each test (see figure 18). After re-
viewing the results and concluding that no further tests are needed, press
next to proceed to next test. The technician must verify that the test proce-
dure is producing the desired result at the equipment.
9:39 am Aug 15, 2012
start
skip tests
deselect all
select all
select tests to run
Blower
HP Heat − 1st Stage
HP Heat − 2nd Stage
Cooling − 1st Stage
Cooling − 2nd Stage
Dehumidification
Gas Heat − Minimum Rate
Gas Heat − Maximum Rate
Humidification
Figure 17. Select tests to run screen
9:39 am Aug 15, 2012
Heating Rate
Blower CFM Demand
Blower Off Delay
Blower On Delay
Indoor Blower RPM
Indoor Blower Power
Flame Current
Flame Sense
Outdoor Temperature
current test: Blower
Check Blower Operation
equipment diagnosticstests alertssetup
%
1400CFM
Off
Off
0
0.0000%
0.000mA
No Flame
63ºF
nextcancel
Figure 18. Typical tests results screens

507064−01 11/12 Page 20
After pressing next after the final test, the Testing finished" screen will ap-
pear (figure 19). At this point, use the EXIT button (if you have completed the
required setup), or use diagnostics button (to analyze the system), or use
equipment button (if you wish to make any changes to device details).
9:39 am Aug 15, 2012
EXIT
equipment diagnosticstests alertssetup
The Testing Process is finished
press ’tests’ button to run more tests
press ’EXIT’ button to start normal operation
Figure 19. Testing finished screen
Equipment, Alerts, Diagnostics
Press equipment if you need to set up equipment parameters and edit de-
tails of devices in the system (see Page 20).
Press alerts if you need to run to see any alerts that may present or to view
alerts that have been cleared (see Page 22).
Press diagnostics if you need to run to analyze the system (see Page 21).
Set up Equipment parameters
Press equipment to set up equipment parameters and edit details of de-
vices in the system without having to re−run the setup program. When the
press start..." screen (figure 20A) appears, press start. The Equipment pa-
rameters" screen (figure 20B) will open. You may view information about or
modify communicating devices as described earlier in the setup pages, be-
ginning on page 14. Use the arrows to select a device and press edit.
Use the arrows to highlight a setting and then press edit (figure 21A). In the
example, the low heating airflow is changed from the default (400) to 325 (fig-
ure 21B). After changing, press save. (note the current value has changed;
figure 21C). Some changes may affect other settings and, if so, those af-
fected will appear in red and require changing/saving to clear the red set-
tings.
equipment diagnosticstests alertssetup
press start button below to edit details of devices in the system
start
back
EXIT
9:39 am Aug 15, 2012
system devices
Furnace
To adjust a setting,
highlight it, then
press Edit
equipmenttestssetup
edit
about
next
resetAll
System
Heat Pump
Furnace
Thermostat
Aux. Dehumidifier
Figure 20. Equipment parameters screen