INSTALLER’S SYSTEM SETUP
GUIDE
© 2012
ALLIED AIR ENTERPRISES
215 METROPOLITAN DR.
WEST COLUMBIA, SC 29170
Comfort Sync Thermostat
Touch Screen Programmable Communicating Thermostat
indoor temperature
outdoor
temperature
set temp
75
cool−to
72
heat to
indoor humidity is 41%
heat
or
cool
away
mode
80
fan is
AUTO
fan is
AUTO
OFF
507064−01
11/12
Supersedes 09/12
Comfort Sync−Enabled Units
A97USMV
4SCU18LS
BCS2M_S
system is cooling
Wi−Fi
CONTROLS
9:39 am Aug 15, 2012
A97DSMV
4SHP18LS
A80US2V
4SCU16LS
A80DS2V
4SHP16LS
?
Shipping and Packing List
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.
11/12
*2P1112*
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
*P507064-01*
Table of Contents
Setting up typical Comfort Sync systems
Page
Indoor Unit
Technical Description/Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation and Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Settings screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Change settings (dealer info, daylight savings, fan circulate) . . . . . . . . . . .
Table 1. System settings defaults and ranges . . . . . . . . . . . . . . . . . . . . . . .
Set Time and Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Add or Remove Non−communicating equipment . . . . . . . . . . . . . . . . . .
Maintenance Timers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outdoor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Humidifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dehumidifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjust a setting screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configure Humidifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configure Dehumidifier (Aux. Dehum. installed) . . . . . . . . . . . . . . . . . .
Configure Dehumidification (no dehumidifier installed) . . . . . . . . . . . . . .
Humidification and Dehumidification Modeshow they work . . . . . . . . . . .
Use the Test Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Set up Equipment Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Use the Diagnostic Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
View and Clear Alerts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Enable Wi−Fi from User Home Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Register the Comfort Sync thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Personal Computer account registration to Comfort Sync server . . . . . .
Access Installer Program from User Home Screen . . . . . . . . . . . . . . . . . . .
Reconfigure a System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stage Delay Timers & Differentials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Smooth Setback Recovery (SSR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heat Pump, Dual Fuel and Balance Points . . . . . . . . . . . . . . . . . . . . . . . . . .
Gas Heat Control Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 2. Variable Capacity Furnace Operation . . . . . . . . . . . . . . . . . . . . . . .
Table 3. Adjustable Parameters (Installer) . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 4. Adjustable Parameters (User) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 5. Alert Codes and Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 6. Troubleshooting Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermostat wire termination in communicating system . . . . . . . . . . . . . . . .
507064−01 11/12
3
4
4
5
6
7
9
9
10
11
12
13
15
16
17
18
19
20
21
22
24
25
26
28
29
30
31
32
34
35
37
43
45
55
59
63
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
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
non−communicating HP
67
not supported
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
Page 2
Comfort Sync Thermostat − Technical Description and Features
The 24VAC Comfort Sync thermostat (figure 1) is an electronic communicating, 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 connection 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 anywhere using a remote internet connection via computer or personal communicating device.
Thermostat
R i+ i− C connections
BEST PRACTICES! Keep all communication wiring as far away from house
electrical wiring and large electrical appliances as possible (15’ [5m] recommended).
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 consumables including media filters, UVC bulbs, and humidifier pads service
/ replacement,
supports variable−capacity / multi−stage heat/cool, universal compatibility (gas/electric/heat pump/ac), and is dual fuel capable (Comfort
Sync−enabled HP only) with two balance points.
RSBus
Minimum wire
size is 18 gauge
GREEN
WHITE
YELLOW
RED
Important
Connections to non−communicating outdoor units and accessories are described in the Quick−Start Installation guide. (Wiring diagrams are also
shown beginning on Page 59 of this manual.)
Maximum total length of all
connections on the RSBus is
limited to 1500 ft. (450 m).
Max. length between components is 300 ft. (90 m).
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
Figure 1. Comfort Sync system
Note: Comfort
Sync thermostat does not
require
shielded cable
wiring.
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, humidification, and dehumidification without user involvement.
Outdoor Temperature Sensor (option)
Communicating outdoor units contain a built−in outdoor temperature sensor.
Page 3
Comfort Sync 7−Day Programmable Communicating Thermostat
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.)
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
Time and Date
NOTE − If electric heat strips are used with an Comfort Sync−enabled air handler, 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.
Daylight Saving Time
Circulate Fan ON Time
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.
Dealer Phone
Touch press here to continue. During the setup
process, alerts may pop open to provide the installer with information that affects the setup.
Correct the cause of any such alerts prior to
continuing setup.
507064−01 11/12
Use this Thermostat?
To adjust a setting, highlight it, then
press edit
current value:
9:39 am Aug 15, 2012
System Name
edit
Dealer Name
Dealer Address
Dealer Email
Dealer Website
back
9:39 am Aug 15, 2012
press here
Figure 2. System settings" screen
Page 4
next
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.
Outdoor Unit Type
Dealer Name
Select one
Circulate Fan ON Time Range
is 15 to 50 %
Default is 35, inc: 1
set−to
Not Installed
1 Stage A/C Unit
2 Stage A/C Unit
1 Stage HP Unit
2 Stage HP Unit
45%
save
cancel
save
up/down arrows
cancel
radio buttons
keyboard tool
Figure 3. Settings change tools
Page 5
Comfort Sync 7−Day Programmable Communicating Thermostat
Circulate fan ON time setting
Table 1. System setting defaults and range
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 settings 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.
507064−01 11/12
system
setting
Time and Date
Daylight Saving
Time
Circulate Fan
ON Time
System Name
range/
condition
Enabled/Disabled
Enabled
15 to 50% (in 1%
increments)
35%
(alpha−numeric
characters)
use keyboard
tool to change
your dealer
Dealer Address
(alpha−numeric
characters)
1−800−448−5872
Dealer Email
Dealer Website
Page 6
use
see Page 7
Dealer Name
Dealer Phone
default
use keyboard
tool to change
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
Time and Date
Daylight Saving Time
Circulate Fan ON Time
To adjust a setting, highlight it, then
press Edit
current value:
9:39 am Aug 15, 2012
System Name
Dealer Name
Dealer Address
edit
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.
system settings
Dealer Phone
January 2012
Dealer Email
Dealer Website
back
next
9:39 am Aug 15, 2012
Figure 4. View/edit time and date
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
09 : 39 am
save
9:39 am Aug 15, 2012
Figure 5. Set current time and date
Page 7
Comfort Sync 7−Day Programmable Communicating Thermostat
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
Language Support
Equipment Type Name
Unit Model Number
Unit Serial Number
system devices
System
Heat Pump
Furnace
Thermostat
press ’about’ for
more information on
a highlighted device
Unit Nominal Capacity
Number of Heating Stages
about
device description
Furnace
Equipment Type Name
Furnace
(returns to
system
devices
screen)
Heating Capacity by Stage
Indoor Blower CFM Range
Control Software Revision
Control Model Number
back
system devices
System
back
next
Heat Pump
Furnace
Add or Remove
Non−communicating equipment?
yes
Thermostat
9:39 am Aug 15, 2012
If no, press Next
Step.
back
Figure 6. About" & Add or Remove Non−communicating equipment" screens
507064−01 11/12
Page 8
next
Add or Remove Non−communicating equipment
Figure 6 (previous page) shows how to access the Add or Remove Non−
communicating equipment" screen.
HUMIDITY CONTROL TIPS
Adding Non−Communicating Outdoor unitSee figure 7 for details
for adding/removing an outdoor unit.
Adding HumidifierThe 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 DehumidifierThe procedures in figure 9 describe adding a
non−communicating dehumidifier controlled by the Comfort Sync thermostat through the DH" output on the furnace or air handler.
NOTICE
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:
A
downloaded via Wi−Fi when available (primary source),
B
sensor furnished with Comfort Sync−enabled outdoor units,
C
separate 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 setpoint 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 accessoriesAdding maintenance
For details about how the humidification and dehumidification
modes operate and how to configure those modes, see additional information beginning on Page 18.
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 maintenance.
Page 9
Comfort Sync 7−Day Programmable Communicating Thermostat
Add Non−Communicating Outdoor unit
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.
Add or Remove
Non−communicating
equipment?
System Devices
System
1
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.
yes
Furnace
to add/remove/adjust a device,
select it, then press edit
non−communicating device list
Outdoor Unit Type
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).
current value:
Humidifier
Dehumidifier
Not Installed
2a
back
2b
next
edit
Outdoor Unit Type
Select one
Not Installed
1 Stage A/C Unit
back
non−communicating device list
2 Stage A/C Unit
1 Stage HP Unit
Outdoor Unit Type
2 Stage HP Unit
3a
Outdoor Unit Capacity
Outdoor Unit 1st Stage Capacity
Humidifier
save
cancel
to add/remove/adjust a device,
select it, then press edit
current value:
2 Stage AC Unit
4a
please view and save all
red settings
Dehumidifier
3b
edit
4b
Outdoor Unit Capacity
Range is 18 to 60
Default is 36, inc:1
set−to
36
back
9:39 am Aug 15, 2012
Figure 7. Add non−communicating deviceOUTDOOR UNIT
507064−01 11/12
Page 10
5b
save
5a
cancel
Add (or Remove) Humidifier (skip if no humidifier is being used)
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−communicating equipment?" screen (see figure 6, Page 8).
system devices
Add or Remove Non−
communicating
System
1 yes
equipment?
Heat Pump
Furnace
non−communicating device list
Thermostat
Humidifier
Not Installed
Humidifier
3a
Power (120VAC) 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.
current value:
2a
Not Installed
To add (or remove) a humidifier,:
to add/remove/adjust a device,
select it, then press edit
Dehumidifier
Electronic Air Cleaner
Select one
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).
back
2b
edit
next
Bypass (24VAC) Humidifier
Bypass and Power Humidifier
(available with furnace equipped systems only)
system devices
3b
save
non−communicating device list
Humidifier
Dehumidifier
Electronic Air Cleaner
cancel
Add or Remove Non−
communicating
equipment?
System
to add/remove/adjust a device,
select it, then press edit
current value:
yes
Heat Pump
Furnace
Thermostat
Bypass (24VAC) Humidifier
Bypass (24VAC) Humidifier
5a
4a
5b
edit
back
back
4b
next
9:39 am Aug 15, 2012
Figure 8. Add or remove non−communicating deviceHUMIDIFIER
Page 11
Comfort Sync 7−Day Programmable Communicating Thermostat
Add (or Remove) Auxiliary Dehumidifier (skip if no dehumidifying device 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 dehumidifier is installed, the operation 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.
Before adding a dehumidifier, be sure that:
the dehumidifier 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−
communicating equipment?" screen (see figure 6, Page 8).
Add or Remove
Non−communicating
equipment?
system devices
System
1
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).
yes
Furnace
to add/remove/adjust a device,
select it, then press edit
non−communicating device list
Humidifier
Dehumidifier
Electronic Air Cleaner
2a
current value:
If ’no’, press Next Step
Not Installed
Select one
3a
Not Installed
save
back
NoteBy default, the minimum dehumidification setpoint of 40% RH. If these settings are
satisfactory, no further configuration is necessary. If another setting is needed, change setpoint as described on Page 16.
next
Auxiliary Dehumidifier
3b
cancel
system devices
to add/remove/adjust a device,
select it, then press edit
non−communicating device list
Humidifier
Dehumidifier
Electronic Air Cleaner
2b
edit
Dehumidifier
4a
System
current value:
Heat Pump
Furnace
Aux. Dehumidifier
Thermostat
Aux. Dehumidifier
Add or Remove Non−
communicating
equipment?
yes
5a
edit
5b
back
4b
back
Figure 9. Add or remove non−communicating deviceDEHUMIDIFIER
507064−01 11/12
Page 12
next
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 1 to 6 in 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.
To adjust a setting,
highlight it, then press
Edit
Furnace
system devices
System
Furnace
Thermostat
(if resetAll
is pressed)
about
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
resetAll
1
2 Stage HP Unit
2
Power (120VAC) Humidifier
Aux. Dehumidifier
edit
confirm
Low Heating Airflow
system devices
Equipment Name
current value:
back
next
325
Heating Airflow Control Type
Low Heating Airflow
Low Heating Airflow
Range is 325 to 450
Default is 400, inc:25
High Heating Airflow
3
High Cooling Airflow
Airflow Profile − Cooling
reset
High HP Airflow
set−to
325
edit
Continuous Indoor Blower Airflow
cancel
4
6
save
5
cancel
back
Figure 10. Adjust communicating device screens
Page 13
Comfort Sync 7−Day Programmable Communicating Thermostat
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
System
Balance Point Control
Staged Delay Timers
current value
2nd Stage Delay
3rd Stage Delay
Balance Point Control
Enabled
Lock In 2nd stage HP by Outdoor Temp
Humidification Control
Mode
Balance
Point Control
Min Dehumidification
Setpoint
Select one
edit
OK/Humid Boundary
Balance Point Control
High Balance Point
Low Balance Point
reset
Enabled
Humidification Control Mode
Min Dehumidification Setpoint
back
save
current value
2nd Stage Delay
3rd Stage Delay
Disabled
Disabled
Balance Point Control
Staged Delay Timers
cancel
please view and save all
red settings
edit
High Balance Point reset
Range is −17 to 75
Default is 0, inc:1
back
set−to
50
save
Figure 11. Accessing device to modify
cancel
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.
507064−01 11/12
Page 14
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
System
Air Conditioner
Furnace
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 Humidification 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.
about
1a
Thermostat
Power (120VAC) Humidifier
1b
System
edit
resetAll
Humidification Control Mode
2nd Stage Differential
Staged Delay Timers
2nd Stage Delay
Dehumidification Control Mode
Humidification Control Mode
Select one
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:
To adjust a setting, highlight it,
then press Edit
System Devices
current value:
back
2a
next
Basic
2b
edit
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.
Humidification Control Mode
reset
Display Only
Basic
Precision
Precision Dew Point
save
3a
3b
System
Max Humidification Setpoint
1stback
Stage Differential
Basic Dew Point Control
2nd Stage Differential
Staged Delay Timers
2nd Stage Delay
Dehumidification Control Mode
Humidification Control Mode
cancel
Max Humidification Setpoint
OK/Humid Boundary
Outdoor Temperature Reading
current value:
45
4b
4a
please view and save all
red settings
45
reset
5b
back
9:39 am Aug 15, 2012
edit
Max Humidification Setpoint
Range is 15 to 45
Default is 45, inc:1
set−to
save
5a
cancel
(returns to
adjust a
setting
screen)
Figure 13. Adjust a non−communicating device settingHUMIDIFIER
Page 15
Comfort Sync 7−Day Programmable Communicating Thermostat
Adjust a setting... Configure Auxiliary Dehumidifier
To adjust a setting,
highlight it,
then press Edit
system devices
System
Air Conditioner
Furnace
System
resetAll
1a
Thermostat
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.
about
1b
Aux. Dehumidifier
edit
reinstall
Dehumidification Control Mode
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
current value:
2a
45
2b
edit
42
reset
4
back
9:39 am Aug 15, 2012
Min Dehumidification Setpoint
Range is 40 to 60
Default is 45, inc:1
set−to
(returns to
adjust a
setting
screen)
3b
save
3a
cancel
Figure 14. Adjust a non−communicating device settingDEHUMIDIFIER
507064−01 11/12
Page 16
Adjust a setting... Configure Dehumidification (no dehumidifying device installed)
(skip if default Basic" dehumidification mode is desired)
System Devices
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.
To adjust a setting, highlight it,
then press Edit
System
System
Furnace
Thermostat
about
1a
2 Stage AC Unit
1b
Power (120VAC) Humidifier
edit
reinstall
System
Dehumidification Control Mode
2nd Stage Differential
Staged Delay Timers
2nd Stage Delay
Dehumidification Control Mode
Humidification Control Mode
OK/Humid Boundary
Outdoor Temperature Reading
back
current value:
2a
2b
Dehumidification Control Mode
Display Only
Precision
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.
edit
System
Select one
next
Display Only
Basic
3a
reset
Dehumidification Control Mode
Staged Delay Timers
back Point Control
Balance
current value:
Precision
Dehumidification Control Mode
Humidification Control Mode
4b
4a
edit
Auto Changeover − Humidif. Deadband
Max Humidification Setpoint
please view and save all
red settings
Min Dehumidification Setpoint
OK/Humid Boundary
save
cancel
Min Dehumidification Setpoint
Range is 40 to 60
Default is 45, inc:1
set−to
45
reset
4
Outdoor Temperature Reading
back
3b
5b
save
5a
cancel
9:39 am Aug 15, 2012
Figure 15. Adjust dehumidification when not using an auxiliary dehumidifier
Page 17
Comfort Sync 7−Day Programmable Communicating Thermostat
Humidification and Dehumidification Modeshow they work
HUMIDIFICATION modes
BASIC & PRECISIONThese 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 attached)
Basic Dew Point ControlBasic 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 ControlPrecision 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 signals 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).
507064−01 11/12
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 Synct thermostat.
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 cooling 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 under 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 installation recommendations.
Page 18
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 feature 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 (figure 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 message to press Start button below to begin system testing" appears. Press
start. The resulting screen will be identical to figure 17.
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
select all
deselect all
start
skip tests
setup
tests
equipment
diagnostics
alerts
9:39 am Aug 15, 2012
press start button below to begin system testing
Figure 17. Select tests to run screen
start
setup
tests
equipment
alerts
diagnostics
back
9:39 am Aug 15, 2012
EXIT
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 running and shows a diagnostic summary of each test (see figure 18). After reviewing the results and concluding that no further tests are needed, press
next to proceed to next test. The technician must verify that the test procedure is producing the desired result at the equipment.
Page 19
current test: Blower
Check Blower Operation
Heating Rate
Blower CFM Demand
Blower Off Delay
Blower On Delay
Indoor Blower RPM
Indoor Blower Power
Flame Current
Flame Sense
Outdoor Temperature
%
1400CFM
Off
Off
0
0.0000%
0.000mA
No Flame
63ºF
cancel
next
9:39 am Aug 15, 2012
Figure 18. Typical tests results screens
Comfort Sync 7−Day Programmable Communicating Thermostat
After pressing next after the final test, the Testing finished" screen will appear (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).
setup
tests
equipment
alerts
diagnostics
Set up Equipment parameters
Press equipment to set up equipment parameters and edit details of devices in the system without having to re−run the setup program. When the
press start..." screen (figure 20A) appears, press start. The Equipment parameters" screen (figure 20B) will open. You may view information about or
modify communicating devices as described earlier in the setup pages, beginning 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 (figure 21B). After changing, press save. (note the current value has changed;
figure 21C). Some changes may affect other settings and, if so, those affected will appear in red and require changing/saving to clear the red settings.
The Testing Process is finished
press ’tests’ button to run more tests
setup
press ’EXIT’ button to start normal operation
tests
equipment
alerts
diagnostics
press start button below to edit details of devices in the system
start
setup
tests
equipment
back
EXIT
system devices
System
9:39 am Aug 15, 2012
Heat Pump
Furnace
Figure 19. Testing finished screen
To adjust a setting,
highlight it, then
press Edit
Furnace
about
resetAll
Thermostat
Equipment, Alerts, Diagnostics
Aux. Dehumidifier
edit
EXIT
Press equipment if you need to set up equipment parameters and edit details 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).
507064−01 11/12
Page 20
next
9:39 am Aug 15, 2012
Figure 20. Equipment parameters screen
setup
tests
When finished, press back; equipment parameters screen (figure 20B returns); then press next. Select tests to run screen appears" (Page 19); either run tests as before or press skip tests.
equipment
system devices
Low Heating Airflow
Equipment Name
Heating Airflow Control Type
Low Heating Airflow
The Testing process screen" (see figure 19) again appears; use the EXIT
button (if you have completed the required setup), or use diagnostics button (to analyze the system; see Page 21), or use equipment button again (if
you want to make any further changes to device details).
current value:
400
High Heating Airflow
High Cooling Airflow
Airflow Profile − Cooling
setup
tests
High HP Airflow
devices
Continuoussystem
Indoor Blower
Airflow
Equipment
Name
Heating
Indoor Blower
OFF Delay
Heating Airflow Control Type
Low Heating Airflow
9:39 am Aug 15, 2012
High Heating Airflow
edit
equipment
resetAll
Low Heating Airflow
back
current value:
High HP Airflow
edit
Default is 400, inc: 25
set−to
resetAll
Continuous Indoor Blower Airflow
325
Heating Indoor Blower OFF Delay
9:39 am Aug 15, 2012save
Run Diagnostics
325
High Cooling AirflowLow Heating Airflow
Range is 325 to 450
Airflow Profile − Cooling
back
cancel
Figure 21. Edit equipment details
Table 3 on (on Page 37) shows a list of Editable Parameters for the currently
available devices designed to communicate in this system. Other devices
and additional parameters may be added at a later time. Check the unit
installation manuals (i.e. furnace, air handler, heat pump, ac unit) for current
information and default parameters.
NOTE − To run diagnostics and insure the system works properly, the system
should be runningset the thermostat so that it will initiate a demand for
cooling, heating, dehumidification, humidification, or continuous fan operation.
If you need to run diagnostics to analyze the system, press the diagnostics
button. The select a device" list (figure 22A) will open.
Use the arrow buttons to scroll through the list of items found on the left of the
screen. The right side of the screen shows which item is selected. Use start
to begin the process. A waiting" message displays while the diagnostics are
being conducted, followed by a screen similar to figure 22B.
Use the arrow buttons to scroll through the information and take note of any
found to be out of operating range.
Page 21
Comfort Sync 7−Day Programmable Communicating Thermostat
Press done when finished with the information. Select another device to
diagnose or use EXIT (to close and go to user Home screen) if finished.
setup
tests
equipment
alerts
diagnostic
s
The left side of the "system and device alerts" screen shows a list of each
communicating device discovered in the system and check boxes for selecting each device. Or, you may use buttons to the right of the System Devices
list to select all (or deselect all). After something has been selected; use
view active to list all active alerts for selected devices. If there are no alerts,
the display will show There are no new alerts that require service". If there
are alerts, these are stored for recall but only one alert will appear in the box
at a time (see figure 23B). Use the next button to advance through all the
alerts. If only one alert is present, the next button will not appear.
select a device:
Heat Pump
current selection:
Furnace
Furnace
start
Alerts may pop up on the screen during setup. Details of all active alerts can
only be accessed through the installer’s screens. To view all alerts present at
any time, press the alerts button. System setup / Diagnostics is complete"
(figure 23B) appears; close it and the Select devices to view alerts screen
(figure 23A) appears.
DIAGNOSTICS
Furnace
Heating Rate
9:39
am Aug
15,Demand
2012
Blower
CFM
Blower Off Delay
Blower On Delay
Indoor Blower RPM
Indoor Blower Power
Flame Current
Flame Sense
Outdoor Temperature
EXIT
40.0%
250 CFM
Off
Off
waiting
waiting
waiting
waiting
Use view cleared alerts to list previously active alerts that were cleared by
the device or installer. Until at least one alert has been cleared by the device
or the installer, the message There are no new alerts that require service"
will be displayed.
The first alert will be displayed in the alert screen (figure 23B), in order of:
1.
88.0ºF
red alert icon
2.
yellow alert icon (service)
A red alert icon identifies a system or device issue that can prevent the system from working properly or at all, and if allowed to run, could cause damage to the system. The issue raised by the alert must be addressed and
corrected before clearing the alert!
done
9:39 am Aug 15, 2012
Figure 22. Select device and run diagnostics
View and clear Installer Alerts
NOTE − Service alerts remind users to service filters, humidifier pad and UV light
and are not shown in the installer’s menu.
507064−01 11/12
From the user’s home screen, press and hold the Swoosh" logo in the bottom right corner of the thermostat to access the installer program. Press yes
when asked if you want to proceed. The installer screen opens at the system and device alerts" screen (figure 23A).
Press clear (figure 23B) to clear a red alert. The alert will be stored in the
cleared alerts" file. If an alert cannot be cleared, revisit the alert issue and
make repairs accordingly.
Page 22
setup
tests
equipment
System Devices
System
alerts
diagnostics
setup
system and device alerts
tests
equipment
No Alerts
Furnace
Thermostat
select all
view active
deselect all
view cleared
back
9:39 am Aug 15, 2012
EXIT
9:39 am Aug 15, 2012
setup
tests
Figure 24. Cleared alert confirmation
equipment
alert description
active alerts
View cleared alerts
A history of cleared alerts allows the installer to review cleared alerts. This
information can help diagnose problems. Use the arrows to select either select all or check an item from the list and then press view cleared alerts.
Then, scroll through the alerts using the next button.
ALERT 1 of 5
Minor Alert Code: 117
System reports:
(Furnace) Poor Ground detected
Latest Occurrence:
10/25/2011 1:13 pm
2 Occurrences
First Occurrence:
10/25/2011 12:01 pm
9:39 am Aug 15, 2012
clear
Press back to return to the alerts screen (figure 23A, Page 23).
back
NEXT
setup
tests
equipment
alert description
ALERT 1 of 5
Minor Alert Code: 117
System reports:
(Furnace) Poor Ground detected
Figure 23. Selecting and viewing alerts
After all active alerts have been cleared, only the back button remains and
the alerts box shows No Alerts" (Figure 24).
Press back to return to the system and device alert screen (figure 23A,
Page 23).
Page 23
Latest Occurrence:
10/25/2011 1:13 pm
2 Occurrences
First Occurrence:
10/25/2011 12:01 pm
9:39 am Aug 15, 2012
cleared alerts
back
next
Figure 25. Cleared alerts screen
Comfort Sync 7−Day Programmable Communicating Thermostat
Enable the thermostat’s Wi-Fi feature from the Home screen
network security key or passphrase
displays information here as keys pressed
Secure Connection Recommended!
press any line to edit it
network name (SSID)
6
none
5.2
security
is WPA2
press here to enter network name
5.2
a
WPA
press here to enter Wi−Fi AP (router) password
WPA2
password
6
WEP
7 END
connect
type the network security key or passphrase for
(locked Wi−Fi Access Point [AP])
6
press here to enter Wi−Fi AP (router) password
7 END
WI−FI SETTINGS
connect
NETWORKSETTINGS
5.1
Wi−Fi
disable
7 END
5.0
5.0 UNSECURED ACCESS
POINT
5.1 SECURE
Access Points
5?
5.2 CREATE NEW AP
1
START
HERE
Wi−Fi
User Agreement
WI−FI SETTINGS
NETWORK
SETTINGS
1
next...
next...
4
3
Wi−Fi
enable
accept
decline
2
Figure 26. Wi−Fi setup
507064−01 11/12
Page 24
Make sure the router is capable of, and set to operate in wireless network b" mode. Check router utility program or contact
service provider for help. A secure wireless network is recommended over an open (unsecured) network. You will need the
homeowner’s approval and router password to enable Wi−Fi in
a secured connection.
Enable Wi−FiTo enable the Wi−Fi feature to communicate with a wireless router:
1. Press and release Wi−Fi" in the lower left corner of the
HOME screen (see START HERE). The screen
changes from the Home Screen to the WI−FI SETTINGS
screen.
2. Press the Wi−Fi enable button.
3. Press next as necessary; then press accept after reading the User Agreement.
4. Press NETWORK SETTINGS; this screen shows a
graphical view of buttons representing Wi−Fi options
OPEN and SECURE wireless networks and a button for
5.2
creating a new access point (AP).
5. Decide which of the following buttons you need to select:
5.0OPEN Wi−Fi Port (no password required).
5.1SECURE Ports (requires router password).
5.2Create new AP (Access Point).
5.2aWhen creating a new AP, you have the option of
selecting a security level (default is none; choose from
WEP, WPA, WPA2, depending on the security defined
in the homeowner’s router); the password field appears.
6. When you touch in one of the input fields (press here to
enter...), the keyboard tool appears. Enter password (if
simply logging into an existing network) or enter the network name if creating a new AP. If you mistype the password or if you cannot access the selected network, a
message will alert you to retry.
7. Press connect to complete the connection. Note that
Wi−Fi enable" button on the Wi−Fi SETTINGS screen
changes to Wi−Fi disable".
Registering the Comfort Sync thermostat
From NETWORK SETTINGS screen, you can change to the desired network as shown in figure 27. Enter security key or passphrase. X" back to the
WI−FI SETTINGS screen.
NOTE − Time from pushing the registration button on the thermostat and receiving the consumer portal register link from your email on your computer is
from 5 to 15 minutes.
After registration has been completed, any available firmware downloads
will immediately start downloading to the thermostat.
REGISTRATION
NOTE NETWORK’s marked with * - Selecting one of these
wireless networks may result in an unreliable connection to
your thermostat. Press help ?" for tips on improving signal
strength.
Register with Comfort Sync thermostat to enable remote access
and online weather information
choose a wireless network
NETGEAR
NETWKB
NETWKC
NETWKD *
(returns to
WI−FI SETTINGS
screen)
enter your email
re−enter your email
System Desc
type the network security key or passphrase for
NETGEAR
register
add new
network
9:39 am Aug 15, 2012
Wi−Fi
WI−FI
SETTINGS
(returns to
HOME
screen)
AP Info
Wi−Fi
dis−
9:39 am Aug 15, connect
2012
?
connected
press to
change network
settings
Figure 27. Change Networks
Registration for online access
From the WI−FI SETTINGS screen, press the thermostat not registered"
button (see figure 28).
Enter homeowner email address twice and press the register button.
A pop up screen then appears to notify the user to check their home computer for instructions to complete the registration. After the server sends the
email with the network link, registration and account creation must be completed on the homeowner’s personal computer (see Page 26).
Wi−Fi
enabled
press to enable
/ disable Wi−Fi
thermostat
not
registered
Firmware
update
auto
press to change
thermostat registration
press to toggle firmware update between
auto" and off"
NOTE −
If any downloads are available
forserver
the has
thermostat
they will
downloading
Connection to
not bee established
or itstart
has been
lost. Please
wait untildownloaded
a connection is or
established.
right away. When new firmware is being
when Gelaskins are
being installed, the9:39
thermostat
screen
will
temporarily
go
blank
and
running
am Aug 15, 2012
Wi−Fi
units may cease operation while the system is being reset to accommodate
the new changes. This is normal and can last a couple minutes.
Figure 28. Registering the system for online access
For any issues with Wi−Fi connections, refer to Wi−Fi Troubleshooting
Checklist 507094−01.
Page 25
Comfort Sync 7−Day Programmable Communicating Thermostat
Personal Computer account registration for Comfort Sync server
NOTE − This following information is customer setup instructions and is shown here to allow the installer to help
walk the customer through the setup process.
NOTE − if the customer has already setup an account,
click the Click Here" button to access that account.
After registering through your Comfort Sync thermostat interface, go to the homeowner’s computer and locate the
email sent from the server:
Dear Customer,
Congratulations on your purchase of an Allied Comfort Sync thermostat! You are only a few steps away
from total control of your Comfort Sync system. Registering your thermostat will allow you to remotely access it from anywhere in the world on any device with
an internet connection. Please complete your Comfort Sync registration by clicking the link below:
Register
Click on the Register link; the screen (to the left) will appear.
Fill in the User Name and Password fields and check the
agree to terms and conditions box. Click Create User button.
A series of pages and prompts follows to provide guidance
through profile setup and user preference definitions.
Figure 29. Computer login for online access
507064−01 11/12
Page 26
Personal Computer Welcome page; Interactive Demo; Online Comfort Sync information; Using Gelaskins
Welcome home.
Access all the great Wi−Fi enabled features on your Comfort Sync thermostat from our secure web portal. After signing in, you´ll be able to view your
Comfort Sync system settings, adjust the temperature and view reminders
and alerts ˘ just as you would on your Comfort Sync thermostat at home.
With a familiar look and settings this simple, you should feel right at home.
Don´t forget to check out the available Apps and customizable skins using
the links on the right side of the page. From the welcome page, you may also
click on links to launch an interactive demo or learn more about Comfort
Sync.
How Do I Turn on Skins on the Comfort Sync Thermostat?
From the thermostat Home screen, press
then display setting then
power save buttons. From the popup menu, select skins. The skin picture
will appear after 30 seconds of inactivity.
How Do I Upload a Skin?
Figure 30. PC Welcome Screen
Skins should be ordered from www.gelaskins.com/comfortsync. After ordering the skin, Gelaskins will email the image file (.jpg) to the homeowner. This
.jpg" has been altered to display correctly on the Comfort Sync Thermostat. Images can be uploaded to the Comfort Sync thermostat from the
consumer portal site (www.mycomfortsync.com) under the tab "skins".
Page 27
Comfort Sync 7−Day Programmable Communicating Thermostat
Access installer program from Home screen
To access the installer program after the unit has been placed in operation
and the user home screen is displayed, press the Comfort Sync logo and
hold for 5 seconds (see figure 31). The system will access the installer
screens.
A message screen stating Qualified Comfort Sync equipment installer
warning" screen appears (Figure 32). Press yes to proceed (no returns to
the home screen).
WARNING!
indoor temperature
75
cool−to
72
heat to
indoor humidity is 41%
outdoor
temperature
set temp
heat
or
cool
The following screens are intended for use by qualified
Comfort Sync equipment installers only.
away
mode
80
Do you want to proceed?
yes
no
fan is
AUTO
fan is
OFF
AUTO
Figure 32. Qualified Comfort Sync equipment
installer warning
system is cooling
Wi−Fi
Wi−Fi
9:39 am Aug 15, 2012
When you press yes, the thermostat’s processor will search for communicating devices in the system. The next display will be a summary of all alerts
detected (see figure 33A).
?
Figure 31. Enter installation setup mode from home screen
507064−01 11/12
After initial installation, if an alert is present when you are making changes to
settings, no action on the alert is mandatory.
Page 28
Reconfigure a system
If any component of the HVAC system has been changed, e.g. replacing an
outdoor sensor, reconfiguring the system will be required. To begin reconfiguring a system (after you have accessed the program from the Swoosh"
logo [previous page]), press the setup button (1, figure 33A). The Start system configuration" screen (fig. 33B) will appear. Press start (2, figure 33B) to
proceed. The Re−configure confirmation" screen (fig. 33C) will appear. This
reminder notes that system configuration may affect some existing device
settings and prompts to confirm or cancel the configuration process.
Press confirm (3, figure 33C) to continue system configuration; the screen
will change to the system discovery screen. At this point, the program goes
through the same setup as the initial setup process which begins on
Page 4.
NOTE − Compatible device found" screen (shown below) appears only
when a device has been removed and replaced with a compatible device.
Missing
Device Equipment Type No.
Model No. (control model no.)
Serial No. (control serial no.)
Found Compatible
Device Equipment Type No.
Model No. (control model no.)
Serial No. (control serial no.)
Settings were not copied
setup
1
tests
Select Devices
System
Furnace
Thermostat
equipment
alerts
diagnostics
system and device alerts
setup
tests
equipment
alerts
diagnostics
setup
tests
equipment
alerts
diagnostics
press start button only if you wish to setup a new system,
or to re−setup an existing system
configuring the system may effect some devices.
select all
deselect all
view active
2
confirm to continue or press cancel
start
view cleared
back
3
confirm
cancel
EXIT
9:39 am Aug 15, 2012
EXIT
9:39 am Aug 15, 2012
9:39 am Aug 15, 2012
EXIT
Figure 33. Re−configuration process
Page 29
Comfort Sync 7−Day Programmable Communicating Thermostat
Stage Delay & Differential Settings (Installer settings)
1st Stage DifferentialStage 1 differential is used in all thermostats. The
default is 1.0°F but can be programmed between 0.5° and 3.0°F in 0.5°F increments.
From the equipment button, use the arrows to select 1st Stage Differential.
Press edit. Use the up/down arrows to adjust to the desired setting and
press save.
2nd Stage Differential (where applicable)The default is 1.0°F but can be
programmed between 0.5° and 8.0°F in 0.5°F increments.
3rd Stage Differential through 6th Stage Differential (where applicable)The default is 0.5°F but can be programmed between 0.5°F and 8.0°F
in 0.5°F increments.
NOTE − Each stage’s differential is based on the previous stage’s differential
endpoint. For example, in cooling mode, if stage 1 differential is set to 1.0ºF,
then the system comes on 0.5ºF above setpoint and the 2nd differential
starts at the 0.5ºF stage 1 endpoint and extends to 2nd stage differential endpoint.
NOTE − In normal operation, the end of the cooling demand is at the setpoint
−0.5ºF and the end of the heating demand is at the setpoint +0.5ºF.
Staged Delay Timersdefault Enabled. When ON, all stage delay timers
(stages 2 through 6) are enabled and will serve to bring on additional stage(s)
of cooling or heating on a timed basis (default 20 minutes) in cases when the
507064−01 11/12
previous stage of heating or cooling will not raise or lower the room temperature to the setpoint in a given time.
When Disabled is selected all stage delay timers are disabled. This means
stages are changed based on the temperature and not their timer delays.
NOTE − The 2nd Stage Delay Timer (when Staged Delay Timers is Enabled)
is used for both HEATING and COOLING. However, if the system has a variable capacity furnace, 2nd Stage Delay Timer will only be used for COOLING (not for heating, as the variable capacity algorithm ignores delay timers).
2nd thru 6th Stage Delay timer (where applicable)If Staged Delay Timers
are Enabled, the default delay is 20 minutes but can be programmed from 5
to 120 minutes in 5−minute increments. If first stage fails to advance the ambient temperature toward the setpoint by 1.0°F in the programmed delay
time, then the second stage is activated.
Heat Cool Stages Locked Indefault Disabled (heat/cool stages are
turned off separately). If changed to Enabled, heat/cool stages are turned off
together. Scroll to Heat Cool Stages Locked In; press edit. Use arrows to
select between Disabled or Enabled. Press save.
Lock In 2nd stage HP by Outdoor Tempdefault Off (heat pump stage 2
operates normally). Use this setting to lock in the 2nd stage compressor
when the outdoor temperature is at or less than the LOCK TEMP setpoint.
Scroll to Lock In 2nd stage HP by Outdoor Temp; press edit. Use arrows to
select a temperature between 40 and 55ºF. Press save.
Page 30
Smooth Setback Recovery (SSR)
SSR is an algorithm designed to smoothly" reach a occupied program
schedule setpoint. The algorithm looks 2 hours ahead for the occupied program schedule period’s setpoint. If the occupied setpoint requires the system to turn on (present temperature below the heat setpoint or above the
cool setpoint), then SSR will calculate a new setpoint. Once initiated, SSR
monitors the change in room temperature and calculates a new setpoint every 30 seconds. Then SSR provides this new setpoint for the heating and
cooling algorithms; the new setpoint will be displayed on the User Interface.
Rules for SSR:
1. SSR is enabled when Smooth Setback Recovery" is set to enabled
and the program schedule is turned on.
2. When SSR is enabled, then it will check for a new setpoint every 30
seconds.
3. The SSR Target Program Schedule setpoint is always 2 hours ahead.
4. When SSR starts, then the Current SSR setpoint will equal the current
program schedule setpoint.
5. When a new program schedule period starts, then the New SSR setpoint will equal the new program schedule period’s setpoint, unless
there are two or more program periods within the 2 hour window. In this
case, SSR will track the highest heat setpoint or the lowest cool setpoint found in the 2 hour window.
6. SSR will NOT run during a program schedule HOLD.
7. SSR does NOT look at the current temperature.
8. If the target program heat setpoint is lower than the Current SSR heat
setpoint, then the New SSR Heat Setpoint will equal the Current SSR
Setpoint.
9. If the target program cool setpoint is higher than the Current SSR cool
setpoint, then the New SSR Cool Setpoint will equal the Current SSR
Setpoint.
10. The New SSR Setpoint will be displayed on the User Interface.
11. SSR does NOT control the equipment.
12. SSR does NOT turn off Stage Delay Timers.
13. SSR does NOT round the newly rounded setpoint, but the setpoint
shown on the user interface is rounded.
14. SSR will NOT change the Temperature Dead band.
15. SSR will not adjust a setpoint to violate the Temperature Dead band.
16. SSR will not overshoot the Target Setpoint.
Page 31
Comfort Sync 7−Day Programmable Communicating Thermostat
Heat Pump, Dual Fuel and Balance Points
IMPORTANT − The Balance Points feature requires that a sensed outdoor temperature is provided to the thermostat. This can be either a
connection to Wi−Fi (for local temperature information) or a connection
to an outdoor sensor (included in all communicating Comfort Sync−enabled heat pumps; optional outdoor temperature sensor X2658 for
non−communicating heat pumps).
pump is not as effective at a lower outdoor temperatures, it may be more
comfortable to use the auxiliary electric heat or the furnace (in dual fuel systems, it may be more economical) to satisfy a demand for heat. The low balance point options are from −20°F to the high balance point temperature. The
setpoint can be adjusted in 1.0°F steps.
Heat Pump Balance Points
If the outside temperature is above the programmed high balance point (set
by default at 50°F), auxiliary electric heat operation or furnace operation (in
dual fuel system) is not allowed. This ensures that the lower cost heat pump
operation will satisfy the heating demand, rather that the more expensive
auxiliary electric heat. The high and low balance points will not lock out both
compressor heat and auxiliary heat/furnace at the same time.
The LOW and HIGH setpoints may be controlled by the Comfort Sync thermostat using the LOW and HIGH Balance Points feature. To enable the Balance Points feature, go to the installer section equipment button. Scroll
down to the System" screen, select edit and scroll down to Balance Points
Controls. Use arrows to select Enabled and then press save. See the flowchart (Page 33) for a simplified explanation of how balance points control
system operation.
Low Balance Point
If the outside temperature is below the programmed low balance point (set
by default at 25°F), compressor operation is not allowed. Since the heat
507064−01 11/12
High Balance Point
Dual Fuel Applications (Communicating Systems Only)
Dual fuel applications, which include both a Heat Pump and a gas furnace,
will provide multiple stages of heating. For example, a two−stage heat pump
would deliver two stages of heat. The gas furnace can add two to four more
stages of heat. Figure 34 flow chart illustrates Dual Fuel operation with Balance Points.
Page 32
Shut down HP
Stg 1...Stg 2
NO
T’stat
heat
demand
?
FURN
heat
lockout
Operate HP
Stg 1...Stg 2
at
or above
HBP
T’stat
heat
demand
?
YES
if
outdoor
between
temperature
HBP and LBP
is...
(See NOTE 2)
at or
below
LBP
Operate FURN
Stg 1...Stg 2
HP stage(s) operate first;
then FURN stage(s) (if
needed; see NOTE 1)
Operate HP
Stg 1...Stg 2
T’stat
heat
demand
?
YES
NO
Operate FURN
YES
Stg 1...Stg 2
YES
T’stat
heat
demand
?
NO
Heat
pump
lockout
Shut down FURN
Stg1...Stg 2
T’stat
heat
demand
?
NO
NOTE 1 − Each Heat Pump and Furnace Heat stage will operate until it meets the demand or until its stage timer lapses (20
minutes by default). If the timer lapses before the demand is
met, the system brings on the next stage in order of:
HP−stg−1, HP−stg−2, FURN−stg−1, FURN−stg−2.
NOTE 2 − The chart below illustrates how the balance points
control whether HP or FURN will operate to provide heat.
OUTDOOR TEMPERATURE
(defaults shown)
YES
Abbreviations:
FURN = auxiliary heat provided by gas furnace
HP = compressor heat
LBP = Low Balance Point
HBP = High Balance Point
T’stat = thermostat
COMPRESSOR ONLY
HBP − FURNACE
LOCKOUT TEMPERATURE
50ºF
EITHER COMPRESSOR
OR FURN HEAT
25ºF
LBP − COMPRESSOR
LOCKOUT TEMPERATURE
FURN ONLY
NOTE 3 − If emergency heat is selected, Furnace is used.
YES
Figure 34. Dual Fuel Operation with Balance Points
Page 33
Comfort Sync 7−Day Programmable Communicating Thermostat
Gas Heat Control Mode
THERMOSTAT
DEMAND
Differential
less than 2nd stage
NO
differential
?
Differential
less than 3rd stage
NO
differential
?
Differential
less than 4th stage
NO
differential
?
YES
YES
YES
Starting firing rate
as determined by
variable capacity
algorithm (35 to
100%)
SYSTEM
IDLE
Differential
less than 2nd stage
NO
differential
?
Increase firing rate
to calculated 2nd
stage firing rate
Increase firing rate
to calculated 3rd
stage firing rate
T’stat
demand sat−
isfied in less than
YES
5 minutes
?
T’stat
demand sat−
isfied in less than
YES
5 minutes
?
NO
NO
YES
Continue at
starting firing rate
Differential
less than 3rd stage
NO
differential
?
YES
NO
T’stat
demand
satisfied
?
YES
YES
Firing rate
increased by
5% every 5
minutes up to
100% firing rate
T’stat
demand
satisfied
?
YES
Differential
less than 4th stage
NO
differential
?
Firing rate
increased by
5% every 5
minutes up to
100% firing rate
NO
T’stat
demand
satisfied
?
YES
Figure 35. Variable Capacity Operation Flow Chart
507064−01 11/12
Page 34
NO
Increase firing
rate to 100%
until thermostat
demand is
satisfied
Variable Capacity Control of Gas Heat Mode
The thermostat includes a feature that provides variable capacity control of
the gas heat mode. The purpose of variable capacity control is to keep the
room temperature at, or near, the desired setpoint with minimum system
cycling. The thermostat bases its decisions" for furnace operation control
using the following inputs:
Room temperature,
History of cycle times (how long does it typically take to bring the room
temperature to the desired setpoint),
Target setpoint, and
Differential temperature settings between 1st − 4th stage.
The thermostat uses this information to vary the heating capacity to efficiently satisfy the heating demand. The full range of the furnace heating capacity
(low end is a percent of the 1st stage capacity; high range is 100% of full
capacity) is used. When in variable capacity gas heat mode, the furnace operation includes longer run times at lower heat stages.
may dictate. The thermostat monitors room temperature, previous heat
cycle times, and target set point to determine the starting firing rate, and any
required firing rate increases during the thermostat demand.
During a heat demand, the Comfort Sync thermostat monitors the differential between set point and room temp. As this differential increases and
reaches field adjustable levels (stages), the thermostat will increase firing
rate accordingly to maintain room temperature and ultimately satisfy the
heat demand. On the next heat cycle, the thermostat will calculate a new
starting firing rate (in 1% increments) with the goal of maintaining room temperature at, or near, thermostat set point with a minimum of system cycling.
The principles of operation are described in figure 35 and table 2.
Table 2. Variable Capacity Furnace Operation
T’stat Demands
Operation
None
Furnace is off
First level heat demand.
1. Furnace BTU rate is calculated by the Comfort Sync integrating algorithm.
2. Furnace firing rate will continue at current heating rate until
first stage demand is satisfied or an additional thermostat demand is received.
Second level heat
demand added
1. Thermostat will immediately increase variable capacity furnace firing rate to the calculated BTU percentage representing the second stage thermostat demand.
2. Furnace firing rate will increase by 5% every 5 minutes (up to
100% if second stage thermostat is not satisfied.) If thermostat second stage demand is satisfied the current firing rate
will continue until all thermostat demands are satisfied.
Third level heat demand added.
1. Thermostat will immediately increase variable capacity furnace firing rate to the calculated BTU percentage representing the third stage thermostat demand.
2. Thermostat will increase the firing rate by 5% every 5 minutes
(up to 100% if third stage thermostat is not satisfied.) If thermostat third stage demand is satisfied the current firing rate
will continue until all thermostat demands are satisfied.
Fourth level heat demand added.
Comfort Sync thermostat will immediately set variable capacity furnace firing rate to 100% until all thermostat demands are
satisfied.
Table 2 details the variable capacity furnace operation.
Staged operation
Some furnaces can be configured to provide up to four stages of gas heat
operation. When staged heating is chosen, the Comfort Sync thermostat allows you to choose between 1, 2, 3 and 4 stages of heat.
Single−stage heat: 1st stage provides 100% of full capacity.
Two−stage heat: 1st stage provides 70% of full capacity; 2nd stage
provides 100% of full capacity.
Three−stage heat: 1st stage provides 60% of full capacity; 2nd stage
provides 80% of full capacity; 3rd stage provides 100% of full capacity.
Four−stage heat: 1st stage provides 35 or 40% of full capacity; 2nd
stage provides 60% of full capacity; 3rd stage provides 80% of full capacity; 4th stage provides 100% of full capacity.
A97_SMV variable capacity furnaces BTU’s firing rates can be incremented
by as little as 1% (40% to 100% range available) as the thermostat algorithm
Page 35
Comfort Sync 7−Day Programmable Communicating Thermostat
Load−tracking Variable Capacity FAQs
(A97_MV only)
Interesting points about the Proportional Integral Algorithm
(PIA):
What is Load−tracking Variable Capacity? When an A97_MV Furnace
is connected to a Comfort Sync thermostat, the thermostat takes complete
charge of the variable capacity staging of the furnace. Load−tracking Variable Capacity is only available with Comfort Sync Wi−Fi thermostats.
How is Load−tracking Variable Capacity different from Variable Capacity? Load−tracking Variable Capacity will smoothly track the load (sensi-
ble temperature changes) up and down and adjust the furnace heating rate
both ways. Variable capacity only tracks the load upward (rising temperature). Variable capacity uses the thermostats stage differentials but not
stage timers. LVC disregards both stage differentials and stage timers.
What makes Load−tracking Variable Capacity work? With Comfort
Sync Load−tracking Variable Capacity, the thermostat uses a Proportional
Integral Algorithm (PIA) to control firing rates of the furnace. The algorithm in
the Load−tracking Variable Capacity provides much more precise control
over the furnace than the Variable Capacity algorithm.
507064−01 11/12
Page 36
The further temperature is from the current set point, the higher PIA
sets the heating rate.
The longer away from a programmed set point, the higher the heating
rate.
If needed, PIA will turn heating on and off in short cycles when there
is a heat demand that is lower than the lowest the furnace can provide.
If the heat demand is higher than the minimum the furnace can provide,
the furnace will run without shutting off.
As the room temperature rises nearer the set point, the heating rate will
decrease.
As the room temperature falls further away from the set point, the heating rate will increase.
The stage differentials have no effect when running the PIA.
The second stage timers have no effect when running the PIA.
Table 3. Adjustable Parameters Table (Installer)
Parameter Name:
Default
Parameter Value Setting
Increment
Installer entry
System (Go to equipment button and scroll to System) NOTE − All of the following changes are made on the stat.
Equipment Name
Filter 1 Timer Selection
Filter 2 Timer Selection
UV Bulb Timer Selection
Humidifier Pad Timer Selection
Smooth Setback Recovery
Auto Changeover − Temp Deadband
Electric Heat Control Mode
Gas Heat Control Mode: (A97_MV)
(A80_2V)
Max Heat Setpoint
Min Cool Setpoint
Heat Cool Stages Locked In
*1st Stage Differential
*2nd Stage Differential
*3rd Stage Differential
*4th Stage Differential
*5th Stage Differential
*6th Stage Differential
Stage Delay Timers
*2nd Stage Delay
*3rd Stage Delay
*4th Stage Delay
*5th Stage Delay
*6th Stage Delay
Calendar Time
Calendar Time
Calendar Time
Calendar Time
Enabled
5ºF
Standard
Load Tracking
Staged
90ºF
60ºF
Disabled
1.0ºF
1.0ºF
0.5ºF
0.5ºF
0.5ºF
0.5ºF
Enabled
20 Minutes
20 Minutes
20 Minutes
20 Minutes
20 Minutes
(keyboard input screen)
Calendar Time, Run Time
Calendar Time, Run Time
Calendar Time, Run Time
Calendar Time, Run Time
Enabled, Disabled
3 to 9ºF
Standard, Even Heat
Load Tracking Variable Capacity, Variable Capacity, Staged
Staged only
40 to 90ºF
60 to 99ºF
Enabled, Disabled
0.5 to 3ºF
0.5 to 8ºF
0.5 to 8ºF
0.5 to 8ºF
0.5 to 8ºF
0.5 to 8ºF
Enabled, Disabled
5 to 120 Minutes
5 to 120 Minutes
5 to 120 Minutes
5 to 120 Minutes
5 to 120 Minutes
1ºF
1ºF
1ºF
0.5ºF
0.5ºF
0.5ºF
0.5ºF
0.5ºF
0.5ºF
5 Min
5 Min
5 Min
5 Min
5 Min
*Number of stages shown in thermostat is dependent on equipment that is installed. Electric heat will bring on 2 elements at a time if available.
table continued on next page
Page 37
Comfort Sync 7−Day Programmable Communicating Thermostat
Table 3. Adjustable Parameters Table (Installer)
Parameter Name:
Lock in 2nd stage HP by Outdoor Temp
Balance Point Control
Default
Parameter Value Setting
Increment
Off
Off, 40ºF (4ºC), 45ºF (7ºC), 50ºF (10ºC), 55ºF (13ºC)
Disabled
Enabled, Disabled
High Balance Point
50ºF
−17ºF to 75ºF
1ºF
Low Balance Point Control
25ºF
−20ºF to 72ºF
1ºF
Defrost Target Discharge Temp
55ºF
50ºF to 60ºF
1ºF
Dehumidification Control Mode
Display Only
Display Only, Basic, Precision (only available when
NO dehumidifier is installed)
Humidification Control Mode
Display Only
Display Only, Basic, Precision, Basic Dew Point Control, Precision Dew Point Control
Autochangeover Humidification Deadband
5%
5% to 10%
1%
Max Humidification Setpoint
45%
15% to 45%
1%
Min Dehumidification Setpoint
40%
40% to 60%
1%
Max Dehumidification Setpoint
40%
40% to 60%
1%
OK/Humid Boundary
50%
45% to 60%
1%
0
−10ºF to 10ºF
1%
Outdoor Temperature Reading Calibration
Installer entry
OUTDOOR EQUIPMENT (Go to EQUIPMENT button and scroll to HEAT PUMP or AIR CONDITIONER.)
Equipment Name (HP & AC)
Outdoor Unit
(keyboard input screen = up to 35 characters in string)
Compressor Short Cycle Delay (HP and AC)
300 Seconds
60 to 300 Seconds
60 Sec
Compressor Shift Delay On/Off (HP only)
Defrost Termination Temp (HP only)
507064−01 11/12
On
On, Off
50ºF
50ºF to 100ºF
Page 38
10ºF
table continued on next page
Table 3. Adjustable Parameters Table (Installer)
Parameter Name:
Default
Parameter Value Setting
Air Handler
(keyboard input screen)
Increment
Installer entry
AIR HANDLER
Equipment Name
Electric Heating Airflow
Low Cooling Airflow
High Cooling Airflow
nnnn CFM
(See Note 3 at
end of table)
5CFM
NOTE: CFM Default and Values Settings are dependent on the tonnage of the unit
5CFM
5CFM
1: No Delays,
Cooling Airflow Profile
1
2: ON: No delays; OFF: 45 sec delay
3: ON: 82%/7.5min; OFF: No delays
4: ON: 50%/30s,82%/7.5min; OFF:50%/30s
Low Heating Airflow
High Heating Airflow
Continuous Indoor Blower Airflow
5CFM
nnnn CFM
(See Note 3 at
end of table)
NOTE: CFM Default and Values Settings are dependent on the tonnage of the unit
70%
60 to 80% (percentage of reduction of High Cooling
Airflow)
1%
10 sec
0 sec
0 sec
2 sec
45 sec
0 sec
0 to 10 Seconds
0 to 5 Seconds
0 to 30 Seconds
0 to 10 Seconds
0 to 60 Seconds
0 to 30 Seconds
1 sec
1 sec
2 sec
1 sec
5 sec
5 sec
Humidification Airflow
Dehumidification Airflow
Delays:
Heating Indoor Blower OFF
Heating Indoor Blower ON
Cooling Indoor Blower OFF
Cooling Indoor Blower ON
HP Indoor Blower OFF
HP Indoor Blower ON
5CFM
10CFM
10CFM
Page 39
Comfort Sync 7−Day Programmable Communicating Thermostat
Table 3. Adjustable Parameters Table (Installer)
Parameter Name
Default
Min.
Max.
Incr.
Dependency
Note
Installer entry
Heating indoor blower OFF delay
DIP SW
60
180
10
None
DIP switch setting in
Non−comm.
Heating indoor blower ON delay
45 sec
15
45
5
None
45 sec fixed in Non−
Comm. IFC
Cooling indoor blower OFF delay
0 sec
0
30
2
Outdoor Unit
present
Not used on Non
Comm. IFC
Cooling indoor Blower ON Delay
2 sec
0
10
1
Outdoor Unit
present
2 sec fixed in Non−
Comm. IFC
Heat pump indoor blower OFF delay
45 sec
0
60
5
Heat Pump present
Not used on Non
Comm. IFC
Heat pump indoor blower ON delay
0 sec
0
30
5
Heat Pump present
Not used on Non
Comm. IFC
Heating Airflow Control Type (variable
capacity furnaces only)
0 – Fixed
CFM
0
1
1
DATS installed
Low Heating Airflow (CFM @ min.
heat)
DIP SW
FURNACE
Gas Heat Airflow Settings
High Heating Airflow (CFM @ 100%
heat)
DIP SW
Low Heating Discharge Air
Temperature (DAT @ min heat)
(variable capacity furnaces only)
DIP SW*
High Heating Discharge Air
Temperature (DAT @ 100% heat)
(variable capacity furnaces only)
DIP SW*
25
See furnace documentation (IOM or
engineering handbook) for size specific information
25
0 (Fixed CFM)
1 (Fixed DAT)
Heating Airflow
Control Type = 0
5
Heating Airflow
Control Type = 1
See furnace documentation (IOM or engineering handbook) for size
specific information
5
* − Default DAT value is rounded to the closest number on 5 deg F resolution and limited by Minimum and Maximum value.
table continued on next page
507064−01 11/12
Page 40
Table 3. Adjustable Parameters Table (Installer)
Parameter Name
Default
Min.
Max.
Incr.
Dependency
OU tons
400CFM
Min
CFM
Max
CFM
25
Outdoor Unit
present
Min
CFM
Max
CFM
25
(See Note 1
at end of
table)
Min
CFM
Max
CFM
25
Min
CFM
Max
CFM
25
DIP SW
0
3
1
Outdoor Unit
present
OU tons
400CFM
Min
CFM
Max
CFM
25
Heat Pump present
Min
CFM
Max
CFM
25
Min
CFM
Max
CFM
25
Min
CFM
Max
CFM
25
Note
Installer entry
Cooling Airflow Settings
High Cooling Airflow (CFM @ 100%
cool)
Low Cooling Airflow (CFM @ lowest
cool stage)
Airflow Profile − Cooling
1/2 HP blower
1 HP blower
2+ stage Outdoor
Unit present
1/2 HP blower
1 HP blower
0 A:ON:50%/30s,82% /
7.5min OFF:50%/30s
1 B:ON:82% / 7.5min; OFF:
No delays
2 C:ON: No delays; OFF:
45sec delay
3 D:No delays)
Heat Pump Airflow Settings
High Heat Pump Airflow (CFM @
100%)
Low Heat Pump Airflow (CFM @
lowest stage)
(See Note 2
at end of
table)
1/2 HP blower
1 HP blower
2+ stage Heat Pump
present
1/2 HP blower
1 HP blower
table continued on next page
Page 41
Comfort Sync 7−Day Programmable Communicating Thermostat
Table 3. Adjustable Parameters Table (Installer)
Parameter Name
Default
Min.
Max.
Incr.
Dependency
Note
Installer entry
Other Parameters
Equipment Name
Continuous Indoor Blower Airflow
Humidification Airflow
Dehumidification Airflow Percentage
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Furnace
N/A
N/A
N/A
None
Up to 35 characters
DIP SW (See
Note 3 at
end of table)
Min
CFM
Max
CFM
25
None
1/2 HP blower
Min
CFM
Max
CFM
25
Same as
above
Min
CFM
Max
CFM
25
Min
CFM
Max
CFM
25
120
(=60%)
160
(=80%)
2
(=1%)
140
(=70%)
1 HP blower
Humidifier present
1/2 HP blower
1 HP blower
OU present and SC
(Subnet Controller)
algorithm support
Percent of High Cooling
Airflow
Minimum Outdoor Unit Cooling Stage as a percentage of High Cooling Airflow (value is rounded up to the closest number on 25 CFM resolution.
Minimum Outdoor Unit Heating Stage as a percentage of High Heat Pump Airflow (value is rounded up to the closest number on 25 CFM resolution).
All communicating Installer Parameters default CFM values based on DIP switch setting (non−communicating value) are calculated using the CFM
conversion tables and rounded up to closest number on 25 CFM resolution.
Parameter dependency − Certain parameters are dependent on others and may not be shown on the display.
Default Values − Jumper/DIP switches impact the default value of some parameters.
507064−01 11/12
Page 42
Table 4. Adjustable Parameters Table (User)
Parameter Name:
Default
Parameter Value Setting
Increment
(Time/date elements screen)
Enabled
Enabled, Disabled
auto
auto, on, circulate
(keyboard input screen)
your dealer
(keyboard input screen)
(keyboard input screen)
Dealer Phone
1−800−448−5872
(keyboard input screen)
Dealer Email
(keyboard input screen)
Dealer Website
(keyboard input screen)
English
English, French, Spanish
Temperature Display Scale **
(F)
(F) Fahrenheit, (C) Celsius
Clock Format
12H
12 Hour, 24 Hour
Screen Lock−out
Unlocked
Unlocked, Partially Locked, Fully Locked
Backlight Setting
Always On
Power Save, Always On
Backlight Intensity
100%
20 to 100%
20%
Outdoor Temp Display
is OFF
is OFF, is ON
Indoor Humidity Display
is OFF
is OFF, is ON
Power Save
is ON
is OFF, is ON
Background theme
cobalt
cobalt, cotton, carbon
Time and Date *
Daylight Saving Time *
Fan
System Name
Installer entry
SERVICE INFORMATION
Dealer Name
Dealer Address
Language Displayed
* Entered during initial installer setup (during initial discovery); should be edited from user preferences.
** When Celsius mode is chosen, Celsius is only changed on home screen; all calculations and other setting are in Fahrenheit.
table continued on next page
Page 43
Comfort Sync 7−Day Programmable Communicating Thermostat
Table 4. Adjustable Parameters Table (User)
Parameter Name:
Default
Parameter Value Setting
Increment
Filter 1 Timer
Disabled
Disabled, 3 Months, 6 Months, 12 Months,
24 Months, Custom Time
Filter 1 Timer
Disabled
Disabled, 3 Months, 6 Months, 12 Months,
24 Months, Custom Time
Humidifier Pad Timer
Disabled
Disabled, 3 Months, 6 Months, 12 Months,
24 Months, Custom Time
UV Bulb Timer
Disabled
Disabled, 3 Months, 6 Months, 12 Months,
24 Months, Custom Time
Maintenance Timer
Disabled
Disabled, 3 Months, 6 Months, 12 Months,
24 Months, Custom Time
THERMOSTAT (Go to equipment button and scroll to Thermostat.)
NOTE − These settings apply to the thermostat’s internal sensors.
Equipment Name
(keyboard input screen)
Temp Reading Calibration
0ºF
−5ºF to 5ºF
1ºF
Humidity Reading Calibration
0%
−10 to 10%
1%RH
507064−01 11/12
Page 44
Installer entry
Table 5. Alert Codes and Troubleshooting
Critical alerts are displayed on Home (user) screen, in the Homeowner alert button, and in the Installer
alert button. Minor and Moderate alerts are found only in the Installer alert button.
Alert
Code
Priority
Alert Text
Steps to clear
10
Critical
(Stat) The thermostat has found an unknown
device on the system.
An unknown device is seen on the subnet in or outside of configuration mode. Clear by reconfiguring
the system. Press the setup tab, press start, and press confirm. If problem persists, then check all
DEVICE connections to make sure they are Comfort Sync−compatible.
11
Critical
(Stat) The thermostat cannot find a previously
installed unit.
Check all connections and cycle system power. If problem persists, clear by reconfiguring the system. Press the setup tab, press start, and press confirm. If problem persists, then check all DEVICE
connections to make sure they are Comfort Sync−compatible.
12
Critical
(Stat) The thermostat cannot find an Comfort
Sync−enabled indoor unit.
Thermostat did not find an Indoor Unit. Make sure there is an Comfort Sync indoor unit on the system. Check R, i+, i− and C connections, ohm wires and cycle power. Replace indoor unit control
board if there is no response.
14
Critical
(Stat) The thermostat found more than one thermostat, more than one indoor unit, or more than
one outdoor unit on the system.
Check wiring and remove duplicate equipment. Reconfigure system.
18
Minor
(Stat) The outside temperature is below the level where the heat pump is programmed to heat
the home. The system will not use the heat
pump to warm your home.
Notification only − Outdoor Temp is below the Low Balance Point. Heat Pump will not be used to
service a heating demand.
19
Minor
(Stat) The outside temperature is higher than
the level where the furnace or electric heat is
programmed to work. The system will only use
the heat pump to warm your home.
Notification only − Outdoor Temp is above the High Balance Point. Indoor Unit (furnace or air−handler)
will not be used to service a heating demand.
29
Critical
(Stat) The thermostat is reading an indoor temperature that is higher than 99ºF. The thermostat will not allow any heating operation to begin
until it senses a temperature lower than 99ºF.
Indoor temperature rose above 99ºF during a heating or cooling demand. Heating operation is not
allowed. Check to ensure that Heating Equipment is not stuck ON (reversing valve, etc.). Check the
accuracy of the thermostat temperature sensor. Select cooling system mode to cool the indoor
space.
30
Moderate
(Stat) The thermostat is reading an indoor temperature that is lower than 40ºF. The thermostat
will not allow any cooling operation to begin until it senses a temperature higher than 40ºF.
Indoor Temp fell below 40ºF. Cooling operation is not allowed. Check to ensure that cooling equipment is not stuck ON. Check accuracy of the thermostat temperature sensor. Select heating system
mode to heat the indoor space to above 40ºF.
31
Critical
(Stat) The thermostat has lost communication
with the (furnace, air−handler or outdoor unit) for
more than 3 minutes.
[Indicated unit] has not communicated with thermostat for more than 3 minutes. Check connections.
Ohm wires. If fault persists, then cycle power. Fault clears after communication is restored.
32
Moderate
(Stat) The (furnace, air−handler or outdoor unit)
is resetting itself.
[Indicated unit] is resetting itself. This event may occur during a power outage or power fluctuation in
the system. If persistent or if it coincides with the system operation then proceed with the following
steps. Check the power connections, check the amp draw at the transformer (the transformer maybe
overloaded) and check 24VAC voltage at the DEVICE. The alarm is only cleared by pressing the
clear button on the Installer Alerts Tab. If the fault persists after checking the connections, replace
the unit’s control board.
table continued on next page
Page 45
Comfort Sync 7−Day Programmable Communicating Thermostat
Table 5. Alert Codes and Troubleshooting
Critical alerts are displayed on Home (user) screen, in the Homeowner alert button, and in the Installer
alert button. Minor and Moderate alerts are found only in the Installer alert button.
Alert
Code
Priority
Alert Text
Steps to clear
34
Critical
(Stat) The thermostat does not know the capacity (tonnage) of the (furnace, air−handler or outdoor unit). Please program the correct capacity
of the (furnace, air−handler or outdoor unit).
[Indicated unit] is missing the programmed unit capacity. Go to [Indicated unit] and program the unit
capacity manually. See the unit IOM for programming instructions. Remove power to thermostat
before programming the unit control board. Once programming is complete, reconnect thermostat
wires and reconfigure system.
36
Critical
(Stat) The system has been heating for at least
15 minutes, without a demand for heating.
Run the system in diagnostic mode and verify that it matches actual equipment operation. Check for
other alarms/codes that may be preventing the system from operating as expected.
Step 1: Check all heating equipment to determine cause of heating demand.
Step 2: Recycle power.
System will clear code when it detects condition has cleared.
37
Critical
(Stat) The system has been cooling for at least
15 minutes, without a demand for cooling.
Run the system in diagnostic mode and verify that it matches actual equipment operation. Check for
other alarms/codes that may be preventing the system from operating as expected.
Step 1: Check all cooling equipment to determine cause of cooling demand.
Step 2: Recycle power.
System will clear code when it detects condition has cleared.
38
Critical
(Stat) The system has not been able to turn on
the heating for more than 45 minutes. The system will go offline for 60 minutes and try again.
Run the system in diagnostic mode and verify that it matches actual equipment operation. Check for
other alarms/codes that may be preventing the system from operating as expected.
Step 1: Check all heating equipment to determine cause.
Step 2: Recycle power.
System will clear code when it detects condition has cleared.
39
Critical
(Stat) The system has not been able to turn on
the cooling for more than 45 minutes. The system will go offline for 60 minutes and try again.
Run the system in diagnostic mode and verify that it matches actual equipment operation. Check for
other alarms/codes that may be preventing the system from operating as expected.
Step 1: Check all cooling equipment to determine cause.
Step 2: Recycle power.
System will clear code when it detects condition has cleared.
105
Critical
(Stat / Furnace / Air Handler / Outdoor Unit) The
(stat, furnace, air−handler or outdoor unit) has
lost communication with the rest of the system.
Equipment is unable to communicate. This may indicate the existence of other alarms/codes. In
most cases errors are related to electrical noise. Make sure high voltage power is separated from
RSBus. Check for mis−wired and/or loose connections between the stat, indoor unit and outdoor unit.
Check for a high voltage source of noise close to the system. Generally, this is a self−recoverable
error.
110
Critical
(Furnace) The line voltage is too low.
This alarm/code may appear during a brownout. Line voltage is below its designed operating value.
Check and correct the power line voltage.
111
Critical
(Furnace) The line power voltage wiring is reversed.
The unit is reporting that its power line and neutral are reversed. Turn off the power to the system and
correct the line power voltage wiring. System resumes normal operation 5 seconds after fault recovered.
112
Critical
(Furnace) The reporting device cannot find
earth ground. The thermostat will shut down the
system.
Provide proper earth ground to the equipment. System resumes normal operation 5 seconds after
fault recovered.
table continued on next page
507064−01 11/12
Page 46
Table 5. Alert Codes and Troubleshooting
Critical alerts are displayed on Home (user) screen, in the Homeowner alert button, and in the Installer
alert button. Minor and Moderate alerts are found only in the Installer alert button.
Alert
Code
Priority
Alert Text
Steps to clear
113
Critical
(Furnace) The line voltage is too high.
Line voltage high (voltage higher than nameplate rating). Provide power voltage within proper range.
System resumes normal operation 5 seconds after fault recovered.
114
Critical
(Furnace / Air Handler) There is a frequency/
distortion problem with the power to the (furnace
or air−handler).
This alarm/code may indicate transformer overloading. Check the voltage and line power frequency.
Check the generator operating frequency, if the system is running on back−up power. Correct voltage
and frequency problems. System resumes normal operation 5 seconds after fault recovered.
115
Critical
(Furnace / Air Handler) The 24VAC to the (furnace or air−handler control board) is lower than
the required range of 18 to 30VAC.
24−Volt Power Low (Range is 18 to 30 volts). Check and correct voltage. Check for additional power−
robbing equipment connected to system. This alarm/code may require the installation of an additional or larger VA transformer.
117
Minor
(Furnace) The reporting unit has poor earth
grounding.
Provide proper grounding for the unit. Check for proper earth ground to the system. The alarm/code
will clear 30 seconds after it is corrected.
120
Moderate
(Stat / Furnace / Air Handler / Outdoor Unit)
There is a delay in the (stat, furnace, air−handler
or outdoor unit) responding to the system.
Typically, this alarm/code does not cause any issues and will clear on its own. The alarm/code is
usually caused by a delay in the outdoor unit responding to the thermostat. Check all wiring connections. Cleared after unresponsive device responds to any inquiry.
124
Critical
(Stat / Furnace / Air Handler / Outdoor Unit) The
thermostat has lost communication with the (furnace, air−handler or outdoor unit) for more than
3 minutes.
Equipment lost communication with the thermostat. Check the wiring connections, ohm wires and
cycle power. The alarm stops all associated HVAC operations and waits for a heartbeat message
from the unit that’s not communicating. The alarm/fault clears after communication is re−established.
125
Critical
(Stat / Furnace / Outdoor Unit) There is a hardware problem on either the (stat, furnace control
board, air−handler control board or outdoor unit
control board).
There is a control hardware problem. Replace the control if the problem prevents operation and is
persistent. The alarm/fault is cleared 300 seconds after the fault recovers.
126
Critical
(Furnace / Outdoor Unit) There is an internal
communication problem with the (furnace control board, air−handler control board or outdoor
unit control board).
There is an internal hardware problem on the control. Typically the control will re−set itself. Replace
the control if the problem prevents operation and is persistent. The alarm/fault is cleared 300 seconds after the fault recovers.
130
Moderate
(Air Handler) An air−handler configuration jumper is missing.
Configuration jumper(s) missing on control (applicable in non−communicating applications only).
Replace the jumper or put wire between terminals on control. Cleared after jumper is connected.
131
Critical
(Stat / Furnace / Air Handler / Outdoor Unit) The
(stat, furnace, air−handler or outdoor unit) control parameters are corrupted.
Reconfigure the system. Replace the control if heating or cooling is not available.
132
Critical
(Air Handler) The air handler control software is
corrupted.
Recycle power. If failure re−occurs, replace the control. System reset is required to recover.
table continued on next page
Page 47
Comfort Sync 7−Day Programmable Communicating Thermostat
Table 5. Alert Codes and Troubleshooting
Critical alerts are displayed on Home (user) screen, in the Homeowner alert button, and in the Installer
alert button. Minor and Moderate alerts are found only in the Installer alert button.
Alert
Code
Priority
Alert Text
Steps to clear
180
Critical
(Furnace / Air Handler / Outdoor Unit) The thermostat has found a problem with the (furnace,
air−handler or outdoor unit) outdoor sensor.
In normal operation after control recognizes sensors, the alarm will be sent if valid temperature
reading is lost. Compare outdoor sensor resistance to temperature/resistance charts in unit installation instructions. Replace sensor pack if necessary. At the beginning of (any) configuration, furnace
or air−handler control will detect the presence of the sensor(s). If detected (reading in range), appropriate feature will be set as ’installed’ and shown in the ’About’ screen. The alarm/fault will clear
upon configuration, or sensing normal values.
200
Critical
(Furnace) The furnace rollout limit switch is
open.
Correct the cause of rollout trip. Reset rollout switch. Reset power to clear. Test the furnace operation. The alarm/fault clears after the furnace rollout switch is closed.
201
Critical
(Furnace / Air Handler) The system has lost
communication with the (furnace or air−handler)
indoor blower motor.
Lost communication with indoor blower motor. Possible causes include: power outage, brown−out,
motor not powered, loose wiring, condensation on air handler control without cover on breaker.
Problem may be on control or motor side. Cleared after communication is restored.
202
Critical
(Furnace / Air Handler) The unit size code for
the (furnace or air−handler) and the size of blower motor do not match.
Incorrect appliance unit size code selected. Check for proper configuring under Unit Size Codes for
Furnace/Air Handler on configuration guide or in installation instructions. The alarm/fault clears after
the correct match is detected following a reset. Remove the thermostat from the system while applying power and reprogramming.
203
Critical
(Furnace / Air Handler) The unit size code for
the (furnace or air−handler) has not been selected.
No appliance unit size code selected. Check for proper configuring under: Unit Size Codes for Furnace/Air Handler on configuration guide or in installation instructions. Critical Alert. The alarm/fault
clears after the correct match is detected following a reset. Remove the thermostat from the system
while applying power and reprogramming.
204
Critical
(Furnace) There is a problem with the furnace
gas valve.
Check gas valve operation and wiring. The alarm/fault clears after the issue is corrected.
205
Critical
(Furnace) The furnace gas valve relay contact
is closed.
Check wiring on control and gas valve. The alarm/fault clears after the issue is corrected.
206
Critical
(Furnace) The furnace gas valve 2nd stage
relay is faulty.
Furnace will operate on 1st stage for the remainder of the heating demand. The alarm/fault will clear
after the issue is corrected. If unable to operate 2nd stage, replace control.
207
Critical
(Furnace) The furnace hot surface igniter is
open.
Measure the resistance of hot surface igniter. Replace the it if it is not within the specified range
found in IOM. The alarm/fault clears after the issue is corrected.
223
Critical
(Furnace) The furnace low pressure switch is
open.
Check pressure (inches w.c.) of low pressure switch closing during a heat call. Measure operating
pressure (inches w.c.). Inspect vent and combustion air inducer for correct operation and restriction.
The alarm/fault clears after the issue is corrected.
224
Critical
(Furnace) The furnace low pressure switch is
stuck closed.
Check operation of low pressure switch to see if it is stuck closed for longer than 150 seconds during
a heat call . Measure operating pressure (inches w.c.). Inspect vent and combustion air inducer for
correct operation and restriction. The alarm/fault clears after the issue is corrected.
225
Critical
(Furnace) The furnace high pressure switch is
failing to close.
Check pressure (inches w.c.) of high pressure switch closing during a heat call. Measure operating
pressure (inches w.c.). Inspect vent and combustion air inducer for correct operation and restriction.
The alarm/fault clears after the issue is corrected.
table continued on next page
507064−01 11/12
Page 48
Table 5. Alert Codes and Troubleshooting
Critical alerts are displayed on Home (user) screen, in the Homeowner alert button, and in the Installer
alert button. Minor and Moderate alerts are found only in the Installer alert button.
Alert
Code
Priority
Alert Text
Steps to clear
226
Critical
(Furnace) The furnace high pressure switch is
stuck closed.
Check operation of high pressure switch closing during a heat call. Measure operating pressure
(inches w.c.). Inspect vent and combustion air inducer for correct operation and restriction. The
alarm/fault clears after the issue is corrected.
227
Moderate
(Furnace) The furnace low pressure switch is
open in run mode.
Check pressure (inches w.c.) of low pressure switch closing during a heat call. Measure operating
pressure (inches w.c.). Inspect vent and combustion air inducer for correct operation and restriction.
The alarm/fault clears after the issue is corrected.
228
Moderate
(Furnace) The furnace control is not able to calibrate the pressure switch.
Unable to perform pressure switch calibration. Check vent system and pressure
switch wiring connections. Check the drain trap for blockage. The alarm/fault clears after a successful calibration.
229
Minor
(Furnace) The furnace control has switched to
high fire ignition because the low fire pressure
switch did not close in the allowed time.
IFC switched to high fire ignition because low fire pressure switch did not close in allowed time. No
action is needed.
240
Moderate
(Furnace) The furnace flame current is low.
Check micro−amperes of the flame sensor using thermostat diagnostics. Clean or replace the flame
sensor. Measure voltage of neutral to ground to ensure good unit ground. The alarm clears after a
proper micro−amp reading has been sensed.
241
Critical
(Furnace) The furnace flame is going out while
the furnace is heating.
Shut off gas. Check for a gas valve leak. Replace the gas valve if needed. The alarm/fault will clear
when a heat call ends successfully.
250
Moderate
(Furnace) The furnace primary limit switch is
open.
Check for proper firing rate on furnace. Ensure there is no blockage in the furnace and the ductwork.
Check for proper air flow. If limit switch is not closed within 3 minutes, the unit will go into 1−hour
Watchguard mode. The alarm/fault will clear when a heat call ends successfully.
252
Moderate
(Furnace) The furnace discharge air−temperature is high.
Check temperature rise, air flow and input rate. Check for dirty filters. The alarm/fault will clear when
a heat call ends successfully.
270
Critical
(Furnace) The furnace is in Watchguard mode.
The furnace igniter cannot turn on the flame.
Check for proper gas flow. Ensure that igniter is lighting burner. Check flame sensor current. Check
for dirty filters. The alarm/fault will clear on successful ignition.
271
Critical
(Furnace) The furnace is in Watchguard mode.
The furnace low pressure switch is open.
Check pressure (inches w.c.) of low pressure switch closing during a heat call. Measure operating
pressure (inches w.c.). Inspect vent and combustion air inducer for correct operation and restriction.
The alarm/fault will clear on successful ignition.
272
Critical
(Furnace) The furnace is in Watchguard mode.
The furnace low pressure switch is open during
run mode.
Check operation of low pressure switch to see if it is stuck open during a heat call. Measure operating pressure (inches w.c.). Inspect vent and combustion air inducer for correct operation and restriction. The alarm/fault will clear when a heat call ends successfully.
273
Critical
(Furnace) The furnace is in Watchguard mode.
The furnace flame is going off during a heating
cycle.
Check micro−amperes of flame sensor using thermostat diagnostics. Clean or replace sensor. Measure voltage of neutral to ground to ensure good unit ground. The alarm/fault will clear when a heat
call ends successfully.
274
Critical
(Furnace) The furnace limit switch has been
open for more than 3 minutes.
The system will go into Watchguard mode. Check firing rate and air flow. Check for blockage. The
alarm/fault will clear when a heat call ends successfully.
table continued on next page
Page 49
Comfort Sync 7−Day Programmable Communicating Thermostat
Table 5. Alert Codes and Troubleshooting
Critical alerts are displayed on Home (user) screen, in the Homeowner alert button, and in the Installer
alert button. Minor and Moderate alerts are found only in the Installer alert button.
Alert
Code
Priority
Alert Text
Steps to clear
275
Critical
(Furnace) The furnace flame is out of sequence.
The system will go into Watchguard mode. Shut off gas. Check for gas valve leak. The alarm/fault
will clear on next successful ignition.
276
Critical
(Furnace) The furnace is not able to calibrate or
the high pressure switch opened or failed to
close in run mode.
The system will go into Watchguard mode. Check vent system and pressure
switch wiring connections. The fault/alarm will clear when the furnace calibrates itself successfully.
290
Critical
(Furnace) There is a problem with the furnace
ignition circuit.
The system will go into Watchguard mode. Measure resistance of hot surface igniter. Replace the hot
surface ignitor it is not within specifications. The alarm/fault will clear on next successful ignition.
291
Critical
(Furnace) The heating airflow is below the minimum required level.
The system will go into Watchguard mode. Check for dirty filters and other air flow restrictions. Check
blower performance. The alarm/fault will clear when a heat call ends successfully.
292
Critical
(Furnace / Air Handler) The (furnace or air−handler) indoor blower motor will not start.
The system will go into Watchguard mode. Indoor blower motor unable to start. This could be due to
seized bearing, stuck wheel, obstruction etc. Replace motor or wheel if assembly does not operate or
meet performance standards. The alarm/fault clears after the indoor blower motor starts successfully.
294
Critical
(Furnace) There is over current in the furnace
inducer motor.
The system will go into Watchguard mode. Check combustion blower bearings, wiring and amps.
Replace if does not operate or does not meet performance standards. The alarm/fault clears after
inducer current is sensed to be in−range after the ignition following the Watchguard mode or reset.
295
Minor
(Furnace) The indoor blower motor is over heating.
Indoor blower motor over temperature (motor tripped on internal protector). Check motor bearings
and amps. Replace if necessary. The alarm/fault clears after blower demand is satisfied.
310
Critical
(Furnace / Air Handler) There is a problem with
(furnace or air−handler) discharge air sensor.
Compare outdoor sensor resistance to temperature/resistance charts in installation instructions.
Replace sensor if necessary. The alarm/fault is cleared 30 seconds after fault is detected as recovered.
311
Minor
(Furnace) The heat firing rate has been reduced
to match available airflow (cutback mode).
Warning Only. Furnace blower in cutback mode due to restricted airflow. Reduce firing rate every 60
seconds to match available CFM. Check filter and duct system. To clear, replace filter if needed or
repair/add duct. 2−stage controls will reduce firing rate to 1st stage. The alarm/fault clears when a
heat call finishes successfully.
312
Minor
(Furnace / Air Handler) The blower cannot provide the requested CFM due to high static.
Warning Only. Restricted airflow − Indoor blower is running at a reduced CFM (Cutback Mode − The
variable speed motor has pre−set speed and torque limiters to protect the motor from damage caused
by operating outside of design parameters (0 to 0.8" e.g.. total external static pressure). Check filter
and duct system. To clear, replace filter if needed or repair/add duct. The alarm/fault is cleared after
the current service demand is satisfied.
313
Minor
(Furnace / Air Handler) The indoor and outdoor
unit capacities do not match.
Check for proper configuring in installation instructions. Alarm is just a warning. The system will
operate, but might not meet efficiency and capacity parameters. The alarm will clear after commissioning is complete.
344
Critical
(Furnace) Relay Y1 Failure
Y1 relay failed; operation stopped. Alarm clears 300 seconds after Y1 input sensed OFF.
table continued on next page
507064−01 11/12
Page 50
Table 5. Alert Codes and Troubleshooting
Critical alerts are displayed on Home (user) screen, in the Homeowner alert button, and in the Installer
alert button. Minor and Moderate alerts are found only in the Installer alert button.
Alert
Code
Priority
Alert Text
Steps to clear
345
Critical
(Air Handler) The O" relay on the air−handler
has failed. Either the pilot relay contacts did not
close or the relay coil did not energize.
O relay / Stage 1 failed. Pilot relay contacts did not close or the relay coil did not energize. Replace
control. Cleared after the fault recovered following reset.
346
Critical
(Air Handler) The heat pump jumper was not
removed on the air−handler control board.
Configuration link(s) not removed on control. Cut O−R. Applicable with non communicating outdoor
unit with communicating indoor system.
347
Critical
(Furnace / Air Handler) The Y1" relay on the
(furnace or air−handler) has failed. Either the
pilot relay contacts did not close or the relay
coil did not energize.
Operation stopped. Y1 relay / Stage 1 failed. (Pilot relay contacts did not close or
the relay coil did not energize; no input back to IFC chip). Critical Alert. Cleared after reset and Y1
input sensed.
348
Critical
(Furnace / Air Handler) The Y2" relay on the
(furnace or air−handler) has failed. Either the
pilot relay contacts did not close or the relay
coil did not energize.
Y2 relay / Stage 2 failed. (Pilot relay contacts did not close or the relay coil did not energize; no input
back to IFC chip). Critical Alert. Cleared after reset and Y1 input sensed.
349
Critical
(Furnace) The O" to R" jumper on the furnace
needs to be restored.
Configuration link R to O needs to be restored. Replace link or hard−wire. Applicable in non communicating mode. Critical Alert.
350
Critical
(Air Handler) The air−handler’s electric heat is
not configured.
Heat call with no configured or mis−configured electric heat. Check for proper configuring under
Configuring Electric Heat Stages in the air handler installation instructions. Cleared after electrical
heat detection is successful.
351
Critical
(Air Handler) There is a problem with the air−
handler’s 1st stage electric heat. Either the pilot
relay contacts did not close, or the relay coil in
the electric heat section did not energize.
Heat section / Stage 1 failed. (Pilot relay contacts did not close, or the relay coil in the electric heat
section did not energize.) Air handler will operate on 1st stage for reminder of the heat call. Will clear
after fault recovered.
352
Critical
(Air Handler) There is a problem with the air−
handler’s 2nd stage electric heat. Either the pilot relay contacts did not close, or the relay coil
in the electric heat section did not energize. The
air−handler will operate on 1st stage electric
heat until the issue is resolved.
Heat section / Stage 2 failed (Same as Code 351).
353
Critical
(Air Handler) There is a problem with the air−
handler’s 3rd stage electric heat. Either the pilot
relay contacts did not close, or the relay coil in
the electric heat section did not energize. The
air−handler will operate on 1st stage electric
heat until the issue is resolved.
Heat section / Stage 3 failed (Same as Code 351).
table continued on next page
Page 51
Comfort Sync 7−Day Programmable Communicating Thermostat
Table 5. Alert Codes and Troubleshooting
Critical alerts are displayed on Home (user) screen, in the Homeowner alert button, and in the Installer
alert button. Minor and Moderate alerts are found only in the Installer alert button.
Alert
Code
Priority
Alert Text
Steps to clear
354
Critical
(Air Handler) There is a problem with the air−
handler’s 4th stage electric heat. Either the pilot
relay contacts did not close, or the relay coil in
the electric heat section did not energize. The
air−handler will operate on 1st stage electric
heat until the issue is resolved.
Heat section / Stage 4 failed (Same as Code 351).
355
Critical
(Air Handler) There is a problem with the air−
handler’s 5th stage electric heat. Either the pilot
relay contacts did not close, or the relay coil in
the electric heat section did not energize. The
air−handler will operate on 1st stage electric
heat until the issue is resolved.
Heat section / Stage 5 failed (Same as Code 351).
370
Critical
(Furnace) The furnace control board has not
received 24VAC power for 2 minutes or more.
Control sees the loss of 24VAC for 2 minutes .Terminate all services and wait for interlock switch to
close. The alarm will clear when 24VAC is continuously sensed on DS terminal for a minimum of 10
seconds or on a power reset. If 2 stage with float switch, the IFC control R−DS is open.
400
Critical
(Outdoor Unit) The compressor internal overload has tripped.
Thermostat demand Y1 is present; but, compressor is not running. Check power to unit. Clears the
error after current is sensed in both RUN and START sensors for at least 2 seconds, or after service
is removed, or after power reset.
401
Moderate
(Outdoor Unit) Either the compressor ran for
more than 18 hours continuously trying to cool
the home or the refrigerant pressure in the system is low.
Compressor ran more than 18 hours to satisfy a single thermostat demand. Will not lockout system.
If 2 stage, units with blinking LED light controls, unit will run in low speed; units with 7−segment
display will display code, but continue to run in high speed. If a Heat Pump, and if outdoor temp is
less than 65 degrees, code is ignored. Clears the error after 30 consecutive normal run cycles or
power reset. Also monitors low pressure switch trips.
402
Critical
(Outdoor Unit) Either the discharge or suction
pressure level is out−of−limits, or the is compressor overloaded.
Discharge or suction pressure out−of−limits, or compressor overloaded. Clears the error after 4 consecutive normal compressor run cycles.
403
Moderate
(Outdoor Unit) The compressor ran for less than
3 minutes to satisfy a thermostat demand.
Compressor runs less than 3 minutes to satisfy a thermostat demand. Clears the
error after 4 consecutive normal run cycles or power reset.
404
Critical
(Outdoor Unit) The compressor rotor is locked
up. This could be due to a short circuiting of the
run capacitor, seizing of the bearings or excessive liquid refrigerant etc.
Compressor rotor locked up due to run capacitor short, bearings are seized, excessive liquid refrigerant, etc. (NOTE: May need to install hard start kit). Clears the error after 4 consecutive normal run
cycles or after power reset.
405
Critical
(Outdoor Unit) The compressor circuit is open.
This could be due to a power disconnection,
open fuse etc.
Compressor circuit open (due to power disconnection, open fuse, etc.) Clears the
error after 1 normal compressor run cycle.
406
Critical
(Outdoor Unit) The required amount of current is
not passing through the start current transformer.
Required amount of current is not passing through Start current transformer. Clears the error after
current is sensed in START sensor, or after power reset.
table continued on next page
507064−01 11/12
Page 52
Table 5. Alert Codes and Troubleshooting
Critical alerts are displayed on Home (user) screen, in the Homeowner alert button, and in the Installer
alert button. Minor and Moderate alerts are found only in the Installer alert button.
Alert
Code
Priority
Alert Text
Steps to clear
407
Critical
(Outdoor Unit) The required amount of current is
not passing through run current transformer.
Required amount of current is not passing through Run current transformer. Clears the error after
current is sensed in RUN sensor, or 1 normal compressor run cycle, or after power reset
408
Critical
(Outdoor Unit) The compressor is running continuously.
Compressor runs continuously. Clears the error after 1 normal compressor run
cycle or after power reset.
409
Moderate
(Furnace / Air Handler / Outdoor Unit) The secondary voltage for the (furnace, air−handler or
outdoor unit) has fallen below 18VAC. If this
continues for 10 minutes, the thermostat will
turn off the (furnace, air−handler or outdoor unit).
Secondary voltage is below 18VAC. After 10 minutes, operation is discontinued.
Clears the code after voltage is higher than 20 VAC for 2 seconds or after power
reset.
410
Moderate
(Outdoor Unit) The outdoor unit pressure is below the required limit.
Unit pressures are below the lower limit. Pressure switch opens at 40 psig (system shuts down) and
closes at 90 psig (system restarts).
411
Critical
(Outdoor Unit) The low pressure switch has
opened 5 times during one cooling cycle. As a
result, the thermostat has shutdown the outdoor
unit.
Open low pressure switch error count reached 5 strikes. Check system charge using approach and
sub cooling temperatures. Reset by putting outdoor unit control in test mode or resetting low voltage
power.
412
Moderate
(Outdoor Unit) The outdoor unit pressure is
above the required limit. The system will shut
down.
Unit pressure is above the upper limit. Pressure switch opens at 590 psig (system shuts down) and
closes at 418 psig (system restarts).
413
Critical
(Outdoor Unit) The high pressure switch has
opened 5 times during one cooling cycle. As a
result, the thermostat has shutdown the outdoor
unit.
Open high pressure switch error count reached 5 strikes. Check system charge
using approach and sub cooling temperatures. Check outdoor fan operation. Check for dirt or debris
blocking air flow to outdoor unit. Reset by putting outdoor unit control in test mode or resetting low
voltage power.
414
Critical
(Outdoor Unit) The discharge line temperature
is higher than the recommended upper limit of
279ºF.
Discharge line temperature is > 279ºF. Make sure coil is clean and airflow unobstructed in and out of
condenser. Check system operating pressures and compare to unit charging charts in installation
manual. Clears after discharge temperature is < 225ºF.
415
Critical
(Outdoor Unit) The discharge line temperature
has been consistently higher than the recommended upper limit of 279ºF.
Discharge line high temperature error count reached 5 strikes. Make sure coil is clean and airflow
unobstructed in and out of condenser. Check system charge using approach and sub cooling temperatures. Reset by putting outdoor board in test mode or resetting low voltage power.
416
Critical
(Outdoor Unit) The outdoor coil sensor is either
open, short−circuited or the temperature is out of
sensor range. As a result the outdoor unit control will not perform any defrost tempering.
Sensor being detected open or shorted, or temperature is out of sensor range.
Outdoor unit control will not perform demand or time/temperature defrost operation. (System will still
heat or cool.) Clears when outdoor unit control detects proper sensor readings.
417
Critical
(Outdoor Unit) The outdoor unit sensor is either
open, short−circuited or the temperature is out of
sensor range. As a result the outdoor unit control will not perform any defrost tempering.
Outdoor unit control detects open or shorted sensor, or temperature that is out of sensor range.
Critical Alert after 10 minutes. Reset by replacing sensor. This fault is detected by allowing the unit to
run for 90 seconds before checking sensor resistance. If the sensor resistance is not within range
after 90 seconds, the board will count one fault. After 5 faults, the board will lock out. Check for
proper sensor reading and attachment to line. Replace if out−of−specifications.
table continued on next page
Page 53
Comfort Sync 7−Day Programmable Communicating Thermostat
Table 5. Alert Codes and Troubleshooting
Alert
Code
Critical alerts are displayed on Home (user) screen, in the Homeowner alert button, and in the Installer
alert button. Minor and Moderate alerts are found only in the Installer alert button.
Priority
Alert Text
Steps to clear
418
Moderate
(Outdoor Unit) There is a faulty W" output circuit.
Faulty W output circuit.
419
Critical
(Outdoor Unit) The W" output on the outdoor
unit has reported more than 5 errors. As a result, the system has shutdown the outdoor unit.
W output hardware fault count reached 5 strikes.
420
Critical
(Air Handler) The heat pump defrost cycle has
taken more than 20 minutes to complete.
Defrost cycle lasts longer than 20 minutes. Check heat pump operation. Cleared
when W1 signal is removed. Applicable only in communicating mode with non−communicating heat
pump.
421
Critical
(Outdoor Unit) The W" output terminal on the
outdoor unit is not wired correctly.
Voltage sensed on W output terminal when Y1 out is deactivated.
700
Moderate
(Stat) The temperature sensor in the thermostat
is not working properly.
Recalibrate thermostat to clear. Replace thermostat if needed.
701
Moderate
(Stat) The thermostat is reading indoor temperatures above the pre−programmed limit.
Recalibrate thermostat to clear; cool thermostat; adjust setpoint. Replace thermostat, if needed.
702
Moderate
(Stat) The thermostat is reading indoor temperatures below the pre−programmed limit.
Recalibrate thermostat to clear; warm thermostat; adjust setpoint. Replace thermostat, if needed.
703
Moderate
(Stat) The humidity sensor in the thermostat is
not working properly.
Recalibrate thermostat to clear; adjust setpoint. Replace thermostat, if needed.
704
Moderate
(Stat) The thermostat is reading indoor humidity
levels above the pre−programmed limit.
Recalibrate thermostat to clear. Replace thermostat, if needed.
705
Moderate
(Stat) The thermostat is reading indoor humidity
levels below the pre−programmed limit.
Recalibrate thermostat to clear. Replace thermostat, if needed.
The ohm reading in the system is either too
high or too low.
Ohm reading between i+ and i− anywhere on the RSBus with supply power off should be between 70
and 90 ohms. If above 90 ohms, check and repair wiring, splices or other wiring defects that may be
causing the excessive resistance. If less than 70 ohms, check for shorted wires.
Ohm
Check
507064−01 11/12
Page 54
Table 6. Troubleshooting Tips
Bold text indicates a button, or text display on the thermostat.
No.
Issue / Problem
Possible Cause
1
− No electric heat operation.
− The thermostat system setting
does not offer a emerg. heat choice
on an HP system.
− The thermostat does not offer any
heat" choice on an AC system with
air handler with electric heat.
Electric heat was not manually
configured configured at the Air
Handler Control (AHC) before the
Comfort Sync system discovery process at initial power−up.
− Manually configure to discover the electric heat section(s) on the air
handling (see Page 64 or Air Handler manual for details).
− Re−setup the Comfort Sync system by selecting the setup button in
the Installer program and press start to begin system discovery;
then reconfigure the system.
2
Thermostat Displays System Waiting message and the furnace does
respond to a heating demand (no red
critical alert icon or alert messages
are displayed on the thermostat).
The furnace is in watchguard"
mode (moderate alert) and will
not display the red critical alert
icon nor be displayed in the
homeowner alert button.
− Go to the installer program alert button to view all alerts and details
about those alerts.
− If the furnace is in watchguard" mode, the furnace can be reset from
the Home screen by setting the thermostat system settings to off
for 20 sec, then back to heat. Then initiate a new heat demand.
3
Outdoor temperature is not displayed
on the thermostat.
Outdoor Temp Display must be
enabled to display the outdoor
temperature on the home screen.
On the home screen, press the right arrow
then press the display settings button. Click on outdoor temp display button to toggle ON.
4
A humidifier was added to the system
as non−communicating equipment
and the thermostat does not provide
the ability to adjust the RH setpoint.
Humidification Control Mode is
set for Display only" which will
not allow the Comfort Sync system to control the humidifier.
− In the installer program, select the equipment button. Select System" from the device list using the up/down arrows and press the edit
button. Use up/down arrows to select Humidification Control Mode
from the list. Select the desired humidifier control mode: Basic, Precision, or Dew Point. (Basic is the most popular) and press the save
button. Follow the red instructions then exit the system.
− If Humidification Control Mode is not offered as a menu item
choice, the Humidifier must be added to the Comfort Sync system
using the Add or Remove Non−communicating equipment screen
under the thermostat installer program in the setup button.
5
The non−communicating outdoor unit
is part of the system, but the thermostat does not display the outdoor unit.
The outdoor unit was not added
as a non−communicating unit during initial system setup.
In the thermostat installer program select the setup button and follow
the on screen instructions until you reach the Add or Remove Non−
communicating equipment screen; press yes. Select Outdoor Unit
Type from the menu and press the edit button. Select 1 Stage AC Unit
or 2 Stage AC Unit and press save. Follow the red instructions then
exit the system.
table continued on next page
Page 55
Corrective Action / Comments
Comfort Sync 7−Day Programmable Communicating Thermostat
Table 6. Troubleshooting Tips
Bold text indicates a button, or text display on the thermostat.
No.
Issue / Problem
Possible Cause
Corrective Action / Comments
6
High Balance Point and Low Balance Point are not listed as a menu
item to adjust the setpoint on the thermostat of the heat pump system.
Balance Point Control must be
enabled to display as the High
Balance Point and Low Balance Point in the menu and provide the ability for the installer to
adjust the setpoint.
− In the installer program select the equipment button, then scroll
down to system device to System and press edit. Scroll down the
menu item choices to Balance Point Control and press edit. Select
enable and press save. High Balance Point and Low Balance
Point are now listed; adjust the balance point settings and press
save.
− If Balance Point Control is not shown as a menu item choice, the
system is not connected to Wi−Fi or does not have/recognize an
outdoor sensor or the system is not a heat pump.
7
Comfort Sync thermostat does not
show a choice for Dew Point Control
Humidification mode (only Basic and
Precision choices).
Dew Point Control will only be
displayed if the system has an
outdoor sensor.
− Add an outdoor sensor to the system and connect to the outdoor
sensor terminals on the indoor unit.
− Comfort Sync system is not able to read the outdoor temperature
sensor in the Comfort Sync outdoor unit, check outdoor sensor.
8
The Comfort Sync does not display
an alert code message, but the furnace or unit control displays a diagnostic code.
The red Critical Alert icon and
homeowner alert button do not
display non−critical alerts.
Go to the installer program alert button to view all alerts and details
about those alerts.
9
The Comfort Sync thermostat does
not display the Model # and or Serial
# indoor or outdoor unit.
The Comfort Sync control was
replaced with a replacement control before the Comfort Sync system was initially setup or configured.
− Replacement Comfort Sync controls do not have the Model # or
Serial # loaded in the control.
− The Model # and Serial # cannot be added to the control.
− System will still operate normally.
10
A non−communicating 2−stage outdoor unit was added to the system
but the unit only runs in 2nd stage.
The W915 2 Stage Compr" clippable option link on the furnace
or air handler control must be cut
when used with a non−communicating 2−stage outdoor unit.
Cut the W915 2 Stage Compr" option link on the furnace or air handler
control.
11
Transfer the Model #, Serial # and
system settings to a replacement
control.
The Comfort Sync system is capable of copying settings from
the previous configuration to the
new compatible device (control)
found.
Reconfigure the system using the installer program and select the
setup button. The system will go through the system discovery process. The thermostat will display missing devices (old control) and
found compatible devices (new control). Press the next button to
accept the new device and copy the settings. Thermostat will display
Settings were copied after successfully copying the information to the
new control. See section title Reconfiguring a system" in this manual.
table continued on next page
507064−01 11/12
Page 56
Table 6. Troubleshooting Tips
No.
Issue / Problem
Bold text indicates a button, or text display on the thermostat.
Possible Cause
Corrective Action / Comments
12
Determine the actual Software version of the thermostat or one of the
Comfort Sync unit controls.
Comfort Sync software is stored
in the control and can be retrieved.
From the home screen click the right arrow
then click service info button; then click the thermostat info button;
(display shows model & serial numbers and hardware, software, Wi−Fi
revision information).
13
The Comfort Sync thermostat shows
an error code related to the outdoor
sensor and or the DAS even after removing these optional accessories.
The outdoor sensor and discharge sensor are options, however if the system was setup with
the sensor in place, the Comfort
Sync system will see an open
sensor reading if it is disconnected.
− Disconnect the outdoor sensor or discharge sensor.
− Using the installer program, reset the system by selecting setup
button and follow the screen prompts as the thermostat goes through
a new system discovery.
14
The Comfort Sync thermostat will not
provide me a choice to add a non−
communicating heat pump to a gas
furnace.
The Comfort Sync system does
not have the ability to control a
non−communicating heat pump
on a dual fuel system.
Replace the Comfort Sync thermostat with a conventional thermostat
that has a dual fuel control mode.
15
During system discovery, the thermostat displays a message Thermostat is unable to communicate to
system components.
The thermostat was not successful in communicating to the indoor
unit.
− Verify the indoor unit has a Comfort Sync communicating control.
− Check wiring connections at R, i+, i− and C at the indoor unit and
thermostats.
− Check R, i+. I− , C wires for open/shorts.
16
Temperature or humidity calibration
does not respond to calibration
changes.
Temperature/Humidity calibration
changes will change display 1ºF
or 1% RH every 3 minutes.
Allow the system to stabilize and complete the calibration mode due to
the time delay. A 5ºF calibration change will take 15 minutes to calibrate
the display.
17
The installer adjustable settings used
to configure the system are not listed
in the equipment button under the
Thermostat 49W95 (only Temp
Reading Calibration and Humidity
Reading Calibration are listed as
menu items).
The adjustable system configuration settings are listed in the
equipment button under System.
− In the installer program select the equipment button and choose
System from system device and press edit.
− Over 25 installer adjustable settings are provided including balance
point, humidification control, dehumidification modes, stage differentials and delays.
table continued on next page
Page 57
Comfort Sync 7−Day Programmable Communicating Thermostat
Table 6. Troubleshooting Tips
No.
Issue / Problem
Bold text indicates a button, or text display on the thermostat.
Possible Cause
Corrective Action / Comments
18
During the cooling mode the displayed air volume on the indoor control is substantially lower than expected.
The system may be following the
cooling ramping" profile or may
be in the dehumidification
mode".
− During the default cooling ramping profile the blower will run for 7.5
minutes at 82% of the cooling air volume. If the cooling ramping
profile" is selected, the system will ramp to 100% after 7.5 minutes.
− The dehumidification mode will run the system at 70% of the cooling
air volume which will be in addition to the air volume reduction provided during the ramping profile. During the dehumidification mode, a
d" will be displayed on the furnace or air handler control.
19
The Indoor unit is not providing the
expected air volume according to the
cfm shown on the indoor unit control.
− Indoor unit air volume settings
in the Comfort Sync thermostat
are not correct.
− System is operating in the cooling mode and following the
cooling ramping profile or dehumidification air volume.
− In the installer program select the equipment button and choose the
furnace or air handler from the system devices list and press edit.
Verify/set the correct air volume for heating and cooling modes.
− If in the cooling mode check for cooling ramp mode or dehumidification mode as in #18.
20
− No second stage cooling is provided on a Comfort Sync outdoor
unit.
− Space temperature is above second
stage differential and has run in first
stage a long time.
− No red Critical Alert icon or alert is
displayed in the homeowner alert
button.
The red Critical Alert icon and
homeowner alert button do not
display non−critical alerts.
− Go to the installer program alert button to view all alerts and details
about those alerts.
− Look for alert code 401 (Compressor Long On Cycle) which indicates
compressor ran more than 18 hours continuous and will lock out 2nd
stage compressor.
− Cycle indoor power off and back on, alert code 401 will clear within a
few minutes.
21
No weather being displayed.
Comfort Sync not communicating with router.
Make sure Wi−Fi is enabled (see Page 24).
22
Unable to complete Wi−Fi router / internet connection
Refer to 507094−01 Wi−Fi Troubleshooting checklist for Comfort Synct thermostat.
507064−01 11/12
Page 58
Wiring Diagrams
Comfort Sync Communicating System Wiring
DAS NOTE − The discharge air sensor is
intended to be mounted downstream of the
furnace heat exchanger and air conditioning
coil. It must be placed in free airflow, where
other accessories (such as humidifiers, UV
lights, etc.) will not interfere with its accuracy. Wiring distance between the IFC or AHC
and the discharge air sensor should not exceed 10ft when wired with 18−gauge thermostat wire.
OAS NOTE − Wiring distance between the
IFC or AHC and the outdoor temperature
sensor should not exceed 200ft when wired
with 18−gauge thermostat wire.
Comfort Sync
FURNACE (IFC) OR AIR HANDLER (AHC)
OPTIONAL DISCHARGE AIR SENSOR (SEE DAS
NOTE)
OPTIONAL OUTDOOR AIR SENSOR
(SEE OAS NOTE)
Comfort Sync
THERMOSTAT
Comfort Sync
OUTDOOR AIR CONDITIONING OR HEAT
PUMP UNIT
RSBus
RSBus
Comfort Sync Thermostat
Comfort Sync Indoor Furnace or Air Handler
Outdoor Condensing Unit or Heat Pump
Maximum total length of all connections on
the RSBus is limited to 1500ft.
Wire gauge of RSBus wire is 18.
Page 59
Comfort Sync 7−Day Programmable Communicating Thermostat
Wiring Diagrams
Comfort Sync Communicating Indoor/non−Communicating Outdoor System Wiring
Comfort Sync AIR HANDLER (AHC)
OPTIONAL DISCHARGE AIR SENSOR (SEE DAS
NOTE Page 59)
Comfort Sync
THERMOSTAT
RSBus
Maximum total
length of all connections on the RSBus
is limited to 1500ft.
Wire gauge of
RSBus wire is 18.
Comfort Sync
Thermostat
Comfort Sync Air Handler
Standard Outdoor Heat
Pump
507064−01 11/12
Comfort Sync FURNACE (IFC) OR AIR HANDLER (AHC)
OPTIONAL DISCHARGE AIR SENSOR (SEE DAS
NOTE Page 59)
OPTIONAL OUTDOOR AIR SENSOR
(SEE OAS NOTE
Page 59)
OPTIONAL OUTDOOR AIR SENSOR
(SEE OAS NOTE
Page 59)
Comfort Sync
THERMOSTAT
Setup Notes:
Cut Y1−Y2 Onboard Link
For 2−stage Outdoor
Units
Cut R−O Onboard Link
For Outdoor Heat Pump
Units
RSBus
Maximum total
length of all connections on the RSBus
is limited to 1500ft.
Wire gauge of
RSBus wire is 18.
STANDARD
OUTDOOR HEAT
PUMP UNIT − 1
OR 2 STAGE
Setup Note:
Cut Y1−Y2 Onboard
Link For 2−stage
Outdoor Units
Comfort Sync Thermostat
Comfort Sync Indoor Furnace or Air Handler
Standard Outdoor Condensing Unit
Page 60
STANDARD
OUTDOOR AIR
CONDITIONING
UNIT − 1 OR 2
STAGE
Optional Accessories Wiring
for use with any Comfort Sync system
Comfort Sync
A97_MV FURNACE (IFC) OR
AIR HANDLER (AHC)
HCWH−01
DEHUMIDIFIER CONTROL
For A80_2V, see HUMIDIFIER diagram below (bottom right)
HVAC
EQUIPMENT
RSBus
HVAC EQUIP
Comfort Sync
THERMOSTAT
Rf Cf Gs Gh W DH NC
DISCHARGE AIR SENSOR (REQUIRED FOR
EVEN HEAT) (SEE DAS
NOTE Page 59)
NOTE: Comfort Sync THERMOSTAT SENSES HUMIDITY & CONTROLS 24V H" OUTPUT (& 120V H" OUTPUT) TO CYCLE HUMIDIFIER BASED ON DEMAND. NO OTHER CONTROL OR HUMIDISTAT REQUIRED.
OPTIONAL OUTDOOR AIR SENSOR FOR USE WITH HUMIDIFIER (IF NOT ALREADY IN THE SYSTEM FOR
OTHER FUNCTIONS. BUILT INTO ALL Comfort Sync OUTDOOR UNITS). (SEE OAS NOTE Page 59)
AUXILIARY DEHUMIDIFIER 090 & 135
capacities only (065 not compatible)
Maximum total
length of all connections on the RSBus
is limited to 1500ft.
A80_2V FURNACE
Comfort
Sync
thermostat
Wire gauge of
RSBus wire is 18.
NOTE: 24V UV LIGHT
APPLICATIONS
Comfort
Sync enabled
outdoor unit
In an Comfort Sync system,
neither furnace nor air handler transformer will have
adequate VA to power 24V
UV light applications. An
additional transformer for UV
light applications is required.
UV light wiring connections
are independent of HVAC
system operation; see UV
light installation instructions.
48G96 Relay
GND
IN
120VAC<−−−−−−−HUMIDIFIER CONNECTIONS−−−−−−> 24VAC
Page 61
Comfort Sync 7−Day Programmable Communicating Thermostat
Optional Accessories Wiring
for use with any Comfort Sync system
Comfort Sync
A97_MV FURNACE (IFC) OR
AIR HANDLER (AHC)
LVCS Ventilation Control System
Comfort
Sync
Furnace or
Air Handler
Comfort Sync
Outdoor Air
Conditioning
or Heat Pump
Comfort Sync
2−STAGE FURNACE
DS
CUT
R−DS
W914
Comfort Sync
Thermostat
R
(POWER COMPANY INTERRUPTION
SYSTEMS ARE WIRED SAME AS
OVERFLOW SWITCH)
RSBus
Standard 1
or 2 stage
AC or HP
unit
Comfort Sync
Furnace or Air Handler
HEPA Bypass Filter X2680 HEPA Interlock Kit
26L56 Currrent sensing relay kit.
NOTE: Pass the blower motor L1 wire through the current loop
on the current sensing relay as shown.
HVAC Heat or Cool call, or the fan is in continuous operation, the ventilation controller will open
OA damper to ventilate if the outdoor temperature and indoor humidity are within the limits of the
ventilation controller.
LVCS. Set cycle time to 1 hour; set ventilation time to 60 minutes.
NOTE: Use the Comfort Sync circulate fan percentage of ON* TIME to control ventilation time.
507064−01 11/12
Page 62
Comfort Sync
Furnace or Air Handler
Pass indoor
blower motor
common wire
through current loop.
See HEPA Interlock Kit for
installation
details
Thermostat wire termination in communicating system
Outdoor Unit
Indoor Unit
Controller
Comfort Sync
thermostat
Single wire to
terminal C
Single wire to
terminal C
Unused wires
Unused wires
Communicating systems using the Comfort Sync thermostat require four
thermostat wires between the thermostat and the furnace/air handler control
and four wires between the outdoor unit and the furnace/air handler control.
When a thermostat cable with more than four wires is used, the extra wires
must be properly connected to avoid electrical noise. The wires must not be
left disconnected.
Use wire nuts to bundle the unused wires at each end of the cable. A single
wire should then be connected to the indoor unit end of the wire bundle and
attached to the C" terminals as shown in the diagram above.
This is not an issue in non−communicating systems.
Page 63
Comfort Sync 7−Day Programmable Communicating Thermostat
HEAT
24 VAC
SMART
1
6
9
5
8
4
1 2 3 4
P8
85
2
NORM
+
R−O
HEAT
PUMP
Y1−Y2
2−STAGE
COMPR
DS
O
BLOWER
ONLY CFM
ADJUST
7
AUTO
EVENHEAT
DELAY
3
DH
HUMIDIFICATION
1 2 3 4
COM
−
L
H
1 2 3 4
DH
R
C
XFMR LINE
L2
Y1
L1
G L2 L1
Y2
G
A92
INTEGRATED
CONTROL
INDOOR
BLOWER
POWER
W3
W2
EARTH
W1
INDOOR BLOWER
SIGNAL
4
5
6
1
2
3
R I+ I− C
OUTDOOR UNIT R I + I − C
THERMOSTAT
PUSHBUTTON
Page 64
C
COOL
130
XFMR 24V
I+ I−
LINK
507064−01 11/12
HUMIDITROL
1 2 3 4
11 5
3 AMP
100
FUSE
R−DS
DEHUMOR
HARMONY
Configuring heat strips on Air Handler Control (AHC)
IMPORTANT: After electric heat strips are installed, the Air Handler Control
(AHC) must be manually configured to detect the number of electric heat
sections. (SEE ALSO Air Handler installation manual for configuration details.)
To configure the heat strips so that they will be detected by the thermostat:
Power must be applied to the air handler but NOT to the thermostat.
Remove thermostat from baseplate or remove wires to thermostat at
the air handler.
On the air handler control (AHC), unit should be in idle mode (decimal
blinks at 1 Hertz0.5 second ON, 0.5 second OFF.
Select field test modepress and hold the pushbutton until solid –"
appears; release button. Display will blink.
Press the pushbutton and wait for the display LED to show H" (capital
H), then release the button.
The AHC cycles the indoor blower motor on" to the selected heat
speed and stages the electric heat relays on" and off" to automatically
detect the number of electric heat sections. The AHC stores the number of electric heat sections, then automatically exits Field Test
Mode".
At this point, the Comfort Sync will now detect the heat strip information stored in the AHC.
LED
OUTDOOR DISCHARGE
AIR SENSOR AIR SENSOR
Setting up typical systemsFURNACE & AIR CONDITIONING UNIT
Comfort Sync−enabled furnace & Comfort Sync−enabled air conditioner
A Comfort Sync−enabled gas furnace (A97_SMV, A80_S2V) with a Comfort
Sync−enabled AC (4SCU16LS or 4SCU18LS) unit.
1. WiringSee Communicating System Wiring diagram on Page 59
and Optional Accessories Wiring (Page 61) for any accessories being installed with the system.
4−conductor thermostat wire from the Comfort Sync thermostat
to the gas furnace (R, i+, i−, C)
4−conductor thermostat wire from the integrated furnace control
(IFC) terminal strip to the Comfort Sync−enabled AC unit (R, i+, i−,
C)
Wiring as required for accessories
2. DO NOT cut any option link on air handler control.
3. After the entire system is wired, power up the system; the Comfort Sync thermostat will check the system for installed communication devices.
4. On the thermostat, go past the Add or remove non−communicating devices" to the To adjust a setting" screen.
5. Use the arrows to select Furnace" from system devices list; press
edit. From this Furnace screen you will have access to the various airflow settings. Set the system air volumes according the needs of the
home. When you change certain settings, the system will prompt you
to please view and save all red settings". Use the arrows to select the
red settings and press edit. Either make changes or not, but press
save either way. The red settings will go away after pressing save.
When all CFM settings are complete, press the back button. Press
next step to advance to the tests button.
6. Using up/down arrows, select the test options individually (if so desired, you may choose to TEST ALL) and press the select button. (If
selecting individual tests, repeat until you have selected all you intend
to run.)
7. Press the start button. Confirm the AC unit is electrically energized and
operational. Press done.
8. Exit the installer setup mode by selecting the EXIT button.
TIPS
Page 65
An outdoor temperature sensor is provided in a Comfort Sync−enabled
air conditioning unit. To display the outdoor temperature on the home
screen of the thermostat, you must turn on (or off) the Outdoor Temp
Display". From the Home screen, press press for more area and select the HELP icon. Press the user preferences box and scroll down
to Outdoor Temp Display". Press the modify button and use the up/
down arrows to select On (or Off) and then press the save button.
Press done to return to the Home screen.
Turn the Indoor Humidity Display on and off in a similar manner as
above.
Comfort Sync 7−Day Programmable Communicating Thermostat
Comfort Sync−enabled furnace & non−communicating air conditioner
A Comfort Sync−enabled gas furnace (A97_SMV, A80_S2V) with a conventional non−communicating air conditioner.
1. WiringSee Communicating Indoor/Non−Communicating Outdoor System Wiring diagram on Page 59 and Optional Accessories
Wiring (Page 61) for any accessories being installed with the system.
4−conductor thermostat wire from the Comfort Sync thermostat
to the gas furnace (R, i+, i−, C)
Conventional thermostat wire with 2 to 4 conductors from the
Comfort Sync furnace terminal strip to the AC unit (Y1, C, & on
some models, R & Y2)
Wiring as required for accessories
2. Cut option link 2−stage compr" (Y1 to Y2, W915) on furnace control on
two−stage AC units only.
3. After the entire system is wired, power up the system; the Comfort Sync thermostat will check the system for installed communication devices.
4. In the installer setup button, select Add or Remove non−communicating equipment by using the yes button.
7. Use the arrows to select Furnace" from system devices list; press
edit. From this Furnace screen you will have access to the various airflow settings. Set the system air volumes according the needs of the
home. When you change certain settings, the system will prompt you
to please view and save all red settings". Use the arrows to select the
red settings and press edit. Either make changes or not, but press
save either way. The red settings will go away after pressing save.
When all CFM settings are complete, press the back button. Press
next step to advance to the tests button.
8. Using up/down arrows, select the test options individually (if so desired, you may choose to TEST ALL) and press the select button. (If
selecting individual tests, repeat until you have selected all you intend
to run.)
9. Press the start button. Confirm the AC unit is electrically energized and
operational. Press done.
10. Exit the installer setup mode by selecting the EXIT button.
TIPS
5. Select the Outdoor Unit Type" from the device list using the up/down
arrows and press the edit button. Then select the AC type (1−stage AC
or 2−stage AC) and press the save button.
6. Select the outdoor unit capacity and minimum outdoor unit capacity
(2−stage only). Press save after editing each setting. Press back when
finished to return to the adjust screen.
507064−01 11/12
Page 66
If the thermostat System Setting" only shows heat only or off
choices and does not offer a choice for cooling" you must Install" the
non−communicating air conditioning unit. Select Add or Remove non−
communicating" under the setup button in the Installer Section. Select
Outdoor Unit Type", press the edit button and then choose 1 Stage
AC" or 2 Stage AC" and press the save button.
On two−Stage Air Conditioners you must cut the W915 2 Stage
Compr" link on the furnace control.
Setting up typical systemsFURNACE & HEAT PUMP (DUAL FUEL)
Comfort Sync−enabled Furnace & Comfort Sync−enabled HP unit (Dual fuel)
Dual fuel system using a Comfort Sync−enabled gas furnace (A97_SMV,
A80_S2V) with a Comfort Sync−enabled heat pump (4SHP16LS or
4SHP18LS).
1. Wiringsee Communicating System Wiring diagram on Page 59
and Optional Accessories Wiring (Page 61) for any accessories being installed with the system.
4−conductor thermostat wire from the Comfort Sync thermostat
to the gas furnace (R, i+, i−, C)
4−conductor thermostat wire from the furnace terminal strip to the
Comfort Sync−enabled HP (R, i+, i−, C)
Wiring as required for accessories
2. DO NOT cut any option link on furnace control.
3. After the entire system is wired, power up the system; the Comfort Sync thermostat will check the system for installed communication devices.
When all CFM settings are complete, press the back button. Press
next step to advance to the tests button.
8. Test the system operation and confirm the HP unit is electrically energized and operational. Press done.
9. Exit the installer setup mode by selecting the EXIT button.
TIPS
4. On the thermostat, go past the Add or remove non−communicating devices" to the To adjust a setting" screen. Select System" from the device list using the up/down arrows and press the edit button
5. Select Balance Point Control and press edit. Use the down arrow to
select Enabled" and press save. High and Low Balance Points will appear in red.
6. Complete Balance Point Control by editing the High and Low Balance
Points. It is not necessary to change the defaults, but you must save
each setting. The red settings will go away after pressing save. Press
the back button to return to the adjust screen.
7. Use the arrows to select Furnace" from system devices list; press
edit. From this Furnace screen you will have access to the various airflow settings. Set the system air volumes according the needs of the
home. When you change certain settings, the system will prompt you
to please view and save all red settings". Use the arrows to select the
red settings and press edit. Either make changes or not, but press
save either way. The red settings will go away after pressing save.
High & Low Balance points are enabled and adjusted under the installer section of the thermostat. In the equipment button select System"
and press edit. Scroll down to Balance Point Control" and press edit
and select Enabled and then save.
An outdoor temperature sensor is provided in an Comfort Sync−enabled heat pump unit. To display the outdoor temperature on the home
screen of the thermostat, you must turn on (or off) the Outdoor Temp
Display". From the Home screen, press press for more area and select the HELP icon. Press the user preferences box and scroll down
to Outdoor Temp Display". Press the modify button and use the up/
down arrows to select On (or Off) and then press the save button.
Press done to return to the Home screen.
Turn the Indoor Humidity Display on and off in a similar manner as
above.
Gas heat is not provided to temper the air during defrost cycles.
Comfort Sync−enabled Furnace &
non−communicating HP unit (Dual fuel)
NOTE − DO NOT use a conventional non−communicating heat pump unit in
an Comfort Sync dual fuel system.
TIPS
Page 67
A conventional thermostat capable of controlling a dual fuel system
must be selected for this type of application. Comfort Sync thermostats currently do not support dual fuel applications.
Comfort Sync 7−Day Programmable Communicating Thermostat
Setting up typical systemsAIR HANDLER & AIR CONDITIONER
Comfort Sync−enabled Air Handler & Comfort Sync−enabled Air Conditioner
A Comfort Sync−enabled air handler (BSC2M_S) with a Comfort Sync−enabled air conditioner (4SCU16LS or 4SCU18LS).
NOTE − IMPORTANT! Be sure to configure the air handler control so that
heat strips (if used) information will be detected by the Comfort Sync thermostat. This must be done prior to powering up the system and thermostat.
1. Configure air handler control (AHC) for auxiliary heat strips if used.
2. WiringSee Communicating System Wiring diagram on Page 59
and Optional Accessories Wiring (Page 61) for any accessories being installed with the system.
4−conductor thermostat wire from the Comfort Sync thermostat
to the air handler (R, i+, i−, C)
4−conductor thermostat wire from the air handler terminal strip to
the Comfort Sync−enabled AC (R, i+, i−, C)
Wiring as required for accessories
3. DO NOT cut any option link on air handler control.
4. After the entire system is wired, power up the system; the Comfort
Sync thermostat will check the system for installed communication devices.
5. On the thermostat, go past the Add or remove non−communicating devices" to the To adjust a setting" screen. Select System" from the device list using the up/down arrows and press the edit button.
6. Use the arrows to select Air Handler" from system devices list; press
edit. From this Air Handler screen you will have access to the various
airflow settings. Set the system air volumes according the needs of the
home. When you change certain settings, the system will prompt you
507064−01 11/12
to please view and save all red settings". Use the arrows to select the
red settings and press edit. Either make changes or not, but press
save either way. The red settings will go away after pressing save.
When all CFM settings are complete, press the back button. Press
next step to advance to the tests button.
7. Test the system operation and confirm the system is electrically energized and operational. Particularly, test the heat strips (when used) to
insure the auxiliary stages operate as designed. Press done.
8. Exit the installer setup mode by selecting the EXIT button.
TIPS
Page 68
If the thermostat System Setting" does not offer a choice for emerg.
heat" and or the electric heat will not function; the electric heat has not
been configured. Configure the electric heat as described on Page 64,
or for complete detail, see the Air Handler installation instructions. Reconfigure the Comfort Sync system by entering the installer program
and selecting the setup button and following the prompts.
An outdoor temperature sensor is provided in an Comfort Sync−enabled air conditioning unit. To display the outdoor temperature on the
home screen of the thermostat, you must turn on (or off) the Outdoor
Temp Display". From the Home screen, press press for more area
and select the HELP icon. Press the user preferences box and scroll
down to Outdoor Temp Display". Press the modify button and use the
up/down arrows to select On (or Off) and then press the save button.
Press done to return to the Home screen.
Turn the Indoor Humidity Display on and off in a similar manner as
above.
Comfort Sync−enabled Air Handler & conventional non−communicating Air Conditioner
A Comfort Sync−enabled air handler (BSC2M_S) with a conventional non−
communicating AC unit.
NOTE − IMPORTANT! Be sure to set up the air handler control for heat strips
(if used) prior to powering up the system and thermostat.
1. Configure air handler control (AHC) for auxiliary heat strips if used.
2. Wiringsee Communicating Indoor / Non−Communicating Outdoor System Wiring diagram on Page 59 and Optional Accessories
Wiring (Page 61) for any accessories being installed with the system.
4−conductor thermostat wire from the Comfort Sync thermostat
to the air handler (R, i+, i−, C)
Comfort Sync air handler to conventional AC (5 – 8 wires). (Y1,
Y2, C, R, W1,W2)
Wiring as required for accessories
3. On 2−stage AC, cut the W915 2 Stage Compr" onboard clippable link.
4. On air handler control, remove jumper between W1 & W2 for two−stage
electric heat only.
9. Use the arrows to select Air Handler" from system devices list; press
edit. From this Air Handler screen you will have access to the various
airflow settings. Set the system air volumes according the needs of the
home. When you change certain settings, the system will prompt you
to please view and save all red settings". Use the arrows to select the
red settings and press edit. Either make changes or not, but press
save either way. The red settings will go away after pressing save.
When all CFM settings are complete, press the back button. Press
next step to advance to the tests button.
10. Test the system operation and confirm the system is electrically energized and operational. Particularly, test the heat strips (when used) to
insure the auxiliary stages have been detected and are operational.
Press done.
11. Exit the installer setup mode by selecting the EXIT button.
TIPS
5. After the entire system is wired, power up the system; the Comfort
Sync thermostat will check the system for installed communication devices.
6. In the installer setup button, select Add or Remove non−communicating equipment by using the yes button.
7. Select the Outdoor Unit Type" from the device list using the up/down
arrows and press the edit button. Then select the AC type (1−stage AC
or 2−stage AC) and press the save button.
8. On the thermostat, go past the Add or remove non−communicating devices" to the To adjust a setting" screen. Select System" from the device list using the up/down arrows and press the edit button
Page 69
If the thermostat System Setting" does not offer a choice for emerg.
heat" and or the electric heat will not function; the electric heat has not
been configured. Configure the electric heat as described on Page 64,
or for complete detail, see the Air Handler installation instructions. Reconfigure the Comfort Sync system by entering the installer program
and selecting the setup button and following the prompts.
If the thermostat System Setting" only shows heat only or off
choices and does not offer a choice for cooling" you must Install" the
non−communicating air conditioning unit. Select Add or Remove non−
communicating" under the setup button in the Installer Section. Select
Outdoor Unit Type", press the edit button and then choose 1 Stage
AC" or 2 Stage AC" and press the save button.
On two−stage Air Conditioners you must cut the W915 2 Stage Compr"
Link on the air handler control.
Comfort Sync 7−Day Programmable Communicating Thermostat
Setting up typical systemsAIR HANDLER & HEAT PUMP UNITS
Comfort Sync−enabled Air Handler & Comfort Sync−enabled Heat Pump unit
A Comfort Sync−enabled air handler (BSC2M_S) with a Comfort Sync−enabled heat pump (4SHP16LS or 4SHP18LS) unit.
NOTE − IMPORTANT! Be sure to set up the air handler control for heat strips
(if used) prior to powering up the system and thermostat.
1. Configure air handler control (AHC) for auxiliary heat strips if used.
2. WiringSee Communicating System Wiring diagram on Page 59
and Optional Accessories Wiring (Page 61) for any accessories being installed with the system.
4−conductor thermostat wire from the Comfort Sync thermostat
to the air handler (R, i+, i−, C)
4−conductor thermostat wire from the air handler terminal strip to
the Comfort Sync−enabled HP (R, i+, i−, C)
Wiring as required for accessories
3. DO NOT cut any option link on air handler control.
4. After the entire system is wired, power up the system; the Comfort
Sync thermostat will check the system for installed communication devices.
5. On the thermostat, go past the Add or remove non−communicating devices" to the To adjust a setting" screen. Select System" from the device list using the up/down arrows and press the edit button
6. Select Balance Point Control and press edit. Use the down arrow to
select Enabled and press save. High and Low Balance Points will appear in red.
8. Use the arrows to select Air Handler from system devices list. Press
edit. From this Air Handler screen you will have access to the various
airflow settings. Set the system air volumes according the needs of the
home. When all CFM settings are complete, press the back button.
Address any red settings as described in steps 6 and 7. Press next
step to advance to the tests button.
9. Test the system operation and confirm the system is electrically energized and operational. Particularly, test the heat strips (when used) to
ensure the auxiliary stages operate as designed. Press done.
10. Exit the installer setup mode by selecting the EXIT button.
TIPS
7. Complete Balance Point Control by editing the High and Low Balance
Points. It is not necessary to change the defaults, but you must save
each setting. The red settings will go away after pressing save. Press
the back button to return to the adjust screen.
507064−01 11/12
Page 70
If the thermostat System Setting" does not offer a choice for emerg.
heat" and or the electric heat will not function; the electric heat has not
been configured. Configure the electric heat as described on Page 64,
or for complete detail, see the Air Handler installation instructions. Reconfigure the Comfort Sync system by entering the installer program
and selecting the setup button and following the prompts.
High & low balance points are enabled and adjusted under the installer
section of the thermostat. In the equipment button select System" and
press edit. Scroll down to Balance Point Control" and press edit and
select Enabled and then save.
An outdoor temperature sensor is provided in an Comfort Sync enabled heat pump unit. To display the outdoor temperature on the home
screen of the thermostat, you must turn on (or off) the Outdoor Temp
Display". From the Home screen, press press for more area and select the HELP icon. Press the user preferences box and scroll down
to Outdoor Temp Display". Press the modify button and use the up/
down arrows to select On (or Off) and then press the save button.
Press done to return to the Home screen.
Comfort Sync−enabled Air Handler & conventional non−communicating Heat Pump unit
A Comfort Sync−enabled air handler (BSC2M_S) with a conventional non−
communicating heat pump unit.
each setting. The red settings will go away after pressing save. Press
the back button to return to the adjust screen.
NOTE − IMPORTANT! Be sure to set up the air handler control for heat strips
(if used) prior to powering up the system and thermostat.
1. Configure air handler control (AHC) for auxiliary heat strips if used.
2. Wiringsee Communicating System Wiring diagram on Page 59
and Optional Accessories Wiring (Page 61) for any accessories being installed with the system.
4−conductor thermostat wire from the Comfort Sync thermostat
to the air handler (R, i+, i−, C)
Conventional thermostat wire with 5 to 6 conductors from Comfort Sync air handler to conventional HP (5 – 8 wires). (Y1, C, R,
W1, O, and on some models Y2)
Wiring as required for accessories
3. On air handler control, with 2−stage HP cut the W915 2 Stage Compr"
onboard clippable link. Cut W951 between W1 & W2 for two−stage
electric heat only.
4. After the entire system is wired, then powered up, the Comfort Sync
thermostat will check the system for installed communication devices.
5. In the installer setup button, select Add or Remove non−communicating equipment by using the yes button.
6. Select the Outdoor Unit Type" from the device list using the up/down
arrows and press the edit button. Then select the heat pump type
(1−stage HP or 2−stage HP) and press the save button.
7. On the thermostat, go past the Add or remove non−communicating devices" to the To adjust a setting" screen. Select System" from the device list using the up/down arrows and press the edit button.
8. Select Balance Point Control (if outdoor sensor is installed) and press
edit. Use the down arrow to select Enabled" and press save. High and
Low Balance Points will appear in red.
9. Complete Balance Point Control by editing the High and Low Balance
Points. It is not necessary to change the defaults, but you must save
10. Use the arrows to select Air Handler from system devices list. Press
edit. From this Air Handler screen you will have access to the various
airflow settings. Set the system air volumes according the needs of the
home. When all CFM settings are complete, press the back button.
Address any red settings as described in steps 8 and 9. Press next
step to advance to the tests button.
11. Test the system operation and confirm the system is electrically energized and operational. Particularly, test the heat strips (when used) to
insure the auxiliary stages operate as designed. Press done.
12. Exit the installer setup mode by selecting the EXIT button.
TIPS
If the thermostat System Setting" does not offer a choice for emerg.
heat" and or the electric heat will not function; the electric heat has not
been configured. Configure the electric heat as described on Page 64,
or for complete detail, see the Air Handler installation instructions. Reconfigure the Comfort Sync system by entering the installer program
and selecting the setup button and following the prompts.
High & low balance points are enabled and adjusted under the installer
section of the thermostat. In the equipment button select System" and
press edit. Scroll down to Balance Point Control" and press edit and
select Enabled and then save.
If an optional outdoor temperature sensor has been installed, you may
display the outdoor temperature on the home screen of the thermostat.
To turn on (or off) the Outdoor Temp Display". From the Home screen,
press press for more area and select the HELP icon. Press the user
preferences box and scroll down to Outdoor Temp Display". Press
the modify button and use the up/down arrows to select On (or Off)
and then press the save button. Press done to return to the Home
screen.
Page 71
Comfort Sync 7−Day Programmable Communicating Thermostat
REVISION HISTORY
Date
Revision description
07−2012
Preliminary release (Draft 1)
09−2012
Draft 2
507064−01 11/12
Page 72