Comfort365 C365W21 User guide

Inside
Tu
Day
Upstairs
Auto
Downstairs
Airflow %
HEAT
Schedule
AUTO
FANMENU MODE
Heat
Set To
SYSTEM
AM
365
Comfort
UP/DOWN Keys.
SYSTEM MODE Key
OFF, HEAT, COOL or AUTO
Displays the downstairs
(Inside) or upstairs (Inside2)
temperature.
Displays the Thermostat Mode
HOLD, SCHEDULE or VACANT
Displays the time, day and schedule
MORNING, DAYTIME, EVENING
or NIGHT
MENU Key Displays
the User options.
Displays the upstairs airflow
Displays the Airflow Mode
AUTOMATIC or MANUAL
Displays the heating or
cooling temperature
FAN MODE Key
AUTO or ON
Installer Manual
Model C365W21 and C365W21WF
365
Comfort
Ver.1.9 Jun 2017
Displays the downstairs airflow
NEXT Key
Used to advance through options
ENTER Key
Used to save options and
return to thermostat operation
Wireless Technology
Link
e
MODE Key
Selects Thermostat Mode
HOLD, SCHEDULE or VACANT
i
If needed, airflow control can be disabled using
Option 17. The thermostat will control the system like
any other thermostat, and the nighttime airflow option
will be disabled.
i
The C365 wireless thermostat controls heating, cooling and
airflow to the upstairs and downstairs using an upstairs and
downstairs wireless, modulating damper. A wireless, battery
powered temperature sensor located upstairs monitors the
upstairs temperature and the temperature sensor in the C365
monitors the downstairs temperature.
The C365 adjusts the upstairs and downstairs airflow during
heating and cooling calls to maintain uniform upstairs and
downstairs temperatures.
SYSTEM MODES Off, Heat, Cool, Auto
THERMOSTAT MODES Hold, Schedule or Vacant mode.
PROGRAMS PER DAY Morning, Daytime, Evening and Night.
PROGRAM FORMAT Weekdays and weekend– 5/2.
TEMPERATURE OVERRIDE Temperature is held for 4 hours
when adjusted in Schedule mode.
FAN MODES Auto or Continuous
AIRFLOW CONTROL Airflow can be turned off using Option
17. Dampers fully open, nighttime airflow options are disabled
and airflow is no longer displayed on the thermostat.
AIRFLOW LIMITS Maximum upstairs and downstairs, heating
and cooling airflow limits can be set during installation.
NIGHTTIME OPERATION The C365 thermostat uses the
upstairs temperature sensor to control heating and cooling
calls and directs more airflow upstairs. If bedrooms are located
downstairs, the Nighttime Airflow option should be turned off.
COMPATIBLE EQUIPMENT Gas/electric equipment with 2-
stage heating and 1-stage cooling or 1-stage heating and 2-
stage cooling and heat pumps with 2-stage heating and 2-
stage cooling.
UPSTAIRS TEMPERATURE SENSOR One or two TS5WL
upstairs wireless temperature sensors can be used.
MODULATING DAMPERS Round or rectangular dampers
using the A80WL2 actuator and up to 1 inch static pressure.
POWER Operates on 24VAC from the HVAC equipment using
the R and C wires.
ATTENTION INSTALLER
i
Nighttime Airflow Option. If bedrooms are located
downstairs, the Nighttime Airflow Option should be
turned OFF using the User Options.
i
Set Options (p.5-7). Options 1 through 5 determine the
equipment operation and must be set if different than
Factory Settings.
After installing dampers and sensors and setting up
wireless communication to the thermostat,
CHECK FOR ERROR MESSAGES (p.4)
Set time of day (p.4).
i
i
The thermostat location must be changed using
Option 27 if the thermostat is located upstairs in
the bedroom area.
i
Homes with plaster walls with steel lathe may
experience wireless communication interference.
i
The Home number must be changed if two wireless
installations are within 300 feet of each other. See
page 3 and page 7, Option 26.

Apply 24VAC to the dampers and set them as the Upstairs
or Downstairs damper.
Wire the 24VAC terminals on the dampers to R and C at
the equipment.
Remove the existing thermostat and install the C365
subbase.
Using the existing thermostat cable connect the subbase
to the equipment.
Install two AA batteries in the C365 thermostat.
Install one or two upstairs temperature sensors.
Set the sensor as #1 or #2
Use the Comfort365 to select equipment and options.
When two or more wireless Comfort365 systems are
installed within 300-feet of each other, different home
addresses can be used to prevent adjacent systems from
interfering with each other.
The small pushbutton switch on the damper actuator is used to
set the wireless damper actuator as the Upstairs or Downstairs
damper. With 24VAC power applied to the actuator, press and
hold the switch until the green LED blinks once or twice.
Release the switch after one blink to set the damper as the
downstairs damper or release the switch after two blinks to set
the damper as the upstairs damper. If more than one damper is
required to define the upstairs or downstairs area, follow the
above instructions to set the additional dampers as Upstairs or
Downstairs dampers.
Installation Sequence
1) Setting Damper as Upstairs or Downstairs
2) Wiring Dampers
1) Setting Dampers as Upstairs or Downstairs
2) Wiring Dampers
3) Installing C365 Thermostat Subbase
4) Wiring the C365 Subbase
5) Installing C365 Batteries
6) Installing the Upstairs Temperature Sensor
7) Setting Temperature Sensors as #1 or #2
Selecting Installer Options
8) Selecting a Different Home Address
Pushbutton
Switch
Green LED
3) Installing C365 Thermostat Subbase
Place a slotted screw driver in the
slots as shown and rotate to
remove subbase from the C365
housing.
Attach the subbase using the
screws and wall anchors
supplied. The wires to the
HVAC equipment pass
through the opening between
the terminals.
R
C
WOB
EQUIPMENT
Y
G
Upstairs
Sensor
W2
C365T21
Detailed directions for each step follow Installation Sequence.
1 Blink = Downstairs Damper
2 Blinks = Upstairs Damper
2
4) Wiring C365 Subbase
The subbase is connected to the equipment using the existing
thermostat cable or a new cable if the replacement equipment
requires more wires.
Warning!
Turn the power to the HVAC equipment off before wiring.
Equipment
24VAC
R
C
The two terminals on the damper actuators are wired to the R
and C terminal at the equipment to power the dampers.
Equipment Wiring, Gas/Electric, 2H/1C
Equipment Wiring, Gas/Electric, 1H/2C
Use 5-conductor, 18 or 20 gage, thermostat cable.
Use 5-conductor, 18 or 20 gage, thermostat cable.
C365
Terminal
C365
Terminal
R
R
C
C
W/OB
W/OB
Y1
Y1
G
G
W2E/Y2
W2E/Y2
Wire Color
Wire Color
Red
Red
Blue
Blue
White
White
Yellow
Yellow
Green
Green
Brown
Brown
Equipment
Terminal
Equipment
Terminal
R, Rc, Rh
R, Rc, Rh
C
C
W, W1
W, W1
Y, Y1
Y, Y1
G
G
W2
Y2
Function
Function
24VAC Power
24VAC Power
Common
Common
Stg1 Heating
Stg1 Heating
Fan
Fan
Stg2 Heating
Stg2 Cooling
Cooling
Stg1 Cooling
See page 8 for description on LED Indicators

3
5) Installing C365 Batteries
The C365 uses two AA batteries for
backup. Slide the battery door
downward to access the battery
compartment. Install two AA
batteries as shown below. Re-install
the door.
6) Installing Upstairs Temperature Sensors
The TS5WL is wireless and powered by two
AA batteries. Two upstairs temperature
sensors can be used and the temperatures
are averaged. for a single sensor installation,
install the sensor on an interior wall about 4-
feet above the floor and in a location that best
senses the upstairs temperature.
Install two AA batteries as shown.
7) Setting Temperature Sensors as #1 or #2
The TS5WL is factory set as #1 wireless temperature sensor.
If two upstairs temperature sensors are used, set the address
number on the second sensor to #2. The sensor location
needs to be documented for future reference. Use the
removable labels included with the thermostat to identify the
sensors as #1 or #2. Place the labels on the front of the
thermostat over the battery cover.
Push Button
Switch
LED Indicator
8) Selecting a Different Home Number
Comfort365 Thermostat
Upstairs and Downstairs Dampers
Upstairs Wireless Temperature Sensors
When two or more wireless Comfort365 installations are within
300-feet of each other, the C365 thermostat, dampers and
upstairs temperature sensors must be set to different Home
numbers so they do not interfere with one another.
Use Installer Option 26 to set a new Home number.
Turn the power off to the damper actuator. While pressing the
push button switch on the actuator, turn the power on. The red
LED will blink once, then two rapid blinks, then three rapid
blinks and so on. Release the switch after the number of
blinks corresponding to the Home number to be set. Changing
the Home number does not affect the assignment as an
Upstairs or Downstairs damper.
Remove one of the batteries to remove power to the sensor.
While pressing the push button switch on the sensor, re-install
the battery. The LED will blink red once, then two rapid blinks,
then three rapid blinks and so on. Release the switch after the
number of blinks corresponding to the Home number to be set.
Changing the Home number does not affect the assignment as
the #1 or #2 sensor.
Press the push button and the LED will blink once, then twice
and repeat this pattern. To set the sensor as the #1 sensor,
release the push button switch after one blink or after two
blinks to set it as #2 sensor. After releasing the push button,
the LED will blink yellow once to indicate successful
communication or blink red indicating that communication was
not successful.
1 Blink = #1 Sensor
2 Blinks = #2 Sensor
Equipment Wiring, Heat Pump, 1 Compressor
Equipment Wiring, Heat Pump, 2-Compressor
Use 5-conductor, 18 or 20 gage, thermostat cable.
Use 5-conductor, 18 or 20 gage, thermostat cable.
24VAC Power
24VAC Power
Stg2 Compressor
Compressor
Stg1 Compressor
C365
Terminal
C365
Terminal
R
R
C
C
WOB
WOB
Y1
Y1
G
G
W2E/Y2
W2E/Y2
Wire Color
Wire Color
Red
Red
Blue
Blue
White
White
Yellow
Yellow
Green
Green
Brown
Brown
Equipment
Terminal
Equipment
Terminal
R, Rc, Rh
R, Rc, Rh
C
C
O or B
O or B
Y, Y1
Y, Y1
G
G
W, W2 or E
Y2
Function
Function
Common
Common
Rev Valve
Rev Valve
Fan
Fan
Aux Heat
For a dual sensor installation, install the
sensors in locations that will best sense the
average upstairs temperature. Mount the
TS5WL subbase using the screws provided.

Option
01
02
03
06
07
08
09
10
11
12
Description
Equipment Type
Reversing Valve
Compressor Stages
Compressor Minimum Off Time (minutes).
Gas Minimum Off Time (minutes).
Minimum Run Time (minutes).
On-Off Temperature Differential
Smart Recovery.
Vacant Heating Setpoint.
Vacant Cooling Setpoint.
o
Differential Mode0 0.5 On/Off Span
o
Differential Mode1 1.0 On/Off Span
o
Differential Mode2 1.5 On/Off Span
Display
+ Heat
+ Cool
rEV
Cpr
Cot
HOt
O O d
S r
V A C
V A C
Range
GE or HP
o or b
0 or 1 (GE), 0 to 2 (HP)
0 to 9
0 to 9
0, 1 or 2
0n(Up) or Off(Down)
44 to 75
74 to 95
Default
Gas/Electric
O
1 (GE), 2 (HP)
2
0
1
Off
65
80
INSTALLER OPTIONS
r n t 0 to 9 2
13
Calibrate Downstairs Sensor C A L +/- 5 0
05 Fan Operation. Fan GA(Up) or EL(Down) GA(Only displayed if GE selected)
04 Heating Stages Htg 0, 1 or 2 1
(Only displayed if HP selected)
14
15
16
17
18
19
20
22
21
23
24
Night Level LCD Backlight
Airflow Control On or Off
Enable Selecting Manual Airflow Control.
Up Stage Time
Maximum Upstairs Airflow in Heating.
Maximum Downstairs Airflow in Heating.
Maximum Upstairs Airflow in Cooling.
Maximum Downstairs Airflow in Cooling.
Maximum Temperature Difference Between
Upstairs and Downstairs.
L BL
AFC
UFC
USt
HAF+Heat
HAF+Heat
CAF+Cool
CAF+Cool
diF
On(Up) or Off(Down)
On(Up) or Off(Down)
On(Up) or Off(Down)
5 to 180 minutes
100 to 160%
100 to 160%
100 to 160
100 to 160%
0 to 10
On
On
Off
30 minutes
150%
150%
140%
140%
2
+ Night
Airflow Update Time A F t 1 to 20 minutes 2 minutes
Calibrate Upstairs Sensor. C A L +/- 5 0
Number of Wireless Sensors Used
Home Number
Factory Restore
Snr
Home
Fr
1 or 2
1 to 8
No(Down) or Yes(Up)
1
1
No
25
26
27 Thermostat Location t Lo Downstairs(Down) or Upstairs(Up) Downstairs
28
Error Message Wireless Sensor Lost
The thermostat displays the Err 01 or Err 02 message indicating it has
lost communication with an upstairs, wireless temperature sensor.
Check the batteries in the sensor(s). The sensor # and/or home # may
be incorrect in sensor 1 and/or sensor 2. Reset the sensor # and home
# in sensor 1 and in sensor 2. See page 3 - Setting Temperature
Sensors as #1 or #2 and Selecting a Different Home Number.
The sensor error message may also be displayed when plaster walls
with steel lathe cause interference with wireless communication or
wireless sensor is out of range.
When an Err 01 error is
detected, the thermostat
alternately displays
When an Err 02 error is
detected, the thermostat
alternately displays
Inside
Day
Upstairs
Auto
Downstairs
Airflow %
COOL
Schedule
AUTO
FANMENU MODE
Cool
Set To
SYSTEM
nP is displayed when
there is no power to the
system. If the message is
displayed when the
system is powered, check
the wiring from the
thermostat to the
equipment for errors.
Error Message No Power
Inside
Tu
Day
Upstairs
Auto
Downstairs
Airflow %
COOL
Schedule
AUTO
FANMENU MODE
Cool
Set To
SYSTEM
AM
Tu
Set Time and Day
ENTER
AM
Touch the UP/DOWN keys to change the
HOUR. Touch NEXT to save the hour and
go to change the minute.
CHANGE THE HOUR
Touch the UP/DOWN keys to change the
MINUTE. Touch NEXT to save the minute
and go to change the day of the week.
CHANGE THE MINUTE
Touch the UP/DOWN keys to change the
DAY OF THE WEEK.
Touch ENTER to save the day fo the
week and return to thermostat operation.
CHANGE THE DAY OF THE WEEK
Inside
Day
Upstairs
Auto
Downstairs
Airflow %
COOL
Schedule
AUTO
FANMENU MODE
Cool
Set To
SYSTEM
Touch here to change the
time and day of the week.
We
AM
ENTER
AM
Tu
AM
NEXT
NEXT
ENTER
When the nS message is displayed, the thermostat will continue to
control the system but the airflow control will be disabled until the
sensor error is corrected.

Option
Touch the UP/DOWN keys to
set 0, 1 or 2 stage.
Touch NEXT or ENTER.
04 Setting the Heating Stages
Factory Default: 1 Stage. Range: 0,1 or 2
Touch the UP/DOWN keys to change
the minimum off time (minutes) before
restarting the compressor.
Touch NEXT to display the next
option, or ENTER to save the option
and return to normal thermostat
operation.
Option
Option
Touch the UP/DOWN keys to
change the minimum off time
(minutes) before restarting a
gas furnace or electric strip
heater.
Touch NEXT or ENTER.
06 Compressor Minimum Off Time
Factory Default: 2 Minutes. Range: 0 to 9 Minutes
07 Heating Minimum Off Time
Factory Default: 0 Minutes. Range: 0 to 9 Minutes
Option
Touch the UP key to select
“EL” for electric operation
where the thermostat activates
the indoor fan (G terminal)
during heating calls or DOWN
key to select GA for gas
operation where the equipment
plenum sensor activates the
indoor fan in heating calls.
Touch NEXT or ENTER.
05 Setting the Fan Operation
Factory Default: Gas. Range: GA or EL
(Only displayed
if GE selected)
Touch NEXT to display the next option, or ENTER to save the option and return to
normal thermostat operation.
Option
Touch the UP/DOWN keys to
change the minimum run time
(minutes) before turning a
system off.
Touch NEXT or ENTER.
08 Minimum Run Time
Factory Default: 2 Minutes. Range: 0 to 9 Minutes
Touch the UP/DOWN keys to
select 0, 1, 2.
Touch NEXT or ENTER.
Option
Differential Mode0
Differential Mode1
Differential Mode2
o
0.5 On/Off Span.
o
1.0 On/Off Span.
o
1.5 On/Off Span.
09 Setting On-Off Temp Differential
Factory Default: #1. Range: 0, 1 or 2.
Touch the UP/DOWN keys to
set 0 or 1 stage.
Touch NEXT to display the
next option. After about 20
seconds, the installer options
will time out and return to
normal thermostat operation.
Option
ENTER
03 Setting the Compressor Stages
This option is used to set the number of compressor stages.
Factory Default: 1 . Range: 0 or 1
Touch the UP/DOWN keys to
select gas/electric (GE) or heat
pump (HP).
Touch NEXT or ENTER.
Option
01 Selecting the Equipment Type
This option is used to select gas/electric or heat pump equipment.
Factory Default: GE. Range: GE or HP
NEXT ENTER
Option
Touch the UP/DOWN keys to
select o for O-Type or b for B-
Type.
Touch NEXT or ENTER.
This option is used to select an O or B type reversing valve.
02 Reversing Valve
Factory Default: o. Range: o or b
(Only displayed if HP selected)
Inside
Tu
Day
Auto
Downstairs
Airflow %
COOL
Schedule
AUTO
FANMENU
Cool
Set To
SYSTEM
AM
TOUCH HOLD and this key for 7 seconds
to access the Installer Options.
The hidden BACK key can be
used to return to previous options.
The hidden BACK key is used to return to previous options
and is located to the left of the NEXT key.
BACK Key
i
The NEXT key is used to display the next option.
i
The ENTER key is used to save options and return to normal
thermostat operation.
i
Press the touchscreen with your fingertip only, using a firm
touch. Do not use a sharp object such as a pen or pencil.
i
Upstairs
To access the Installer Options, TOUCH and HOLD the hidden Enter
key for 7 seconds until the first Option appears on the screen.
ACCESSING INSTALLER OPTIONS
5
NEXT ENTER
NEXT ENTER
NEXT ENTER
NEXT ENTER
NEXT ENTER
NEXT ENTER
NEXT
NEXT ENTER
NEXT ENTER
MODE

6
This is the frequency, in minutes, that the damper position is updated.
This option turns the automatic airflow control on or off. If on, the
thermostat will automatically adjust the airflow. If off, airflow is disabled.
ENTER
ENTER
NEXT
Factory Default: 2 Minutes. Range: 1 to 20 Minutes.
NEXT
Option
Option
Option
16 Night Level LCD Backlight
17 Airflow Control, On or Off
Night
Upstairs
Downstairs
Airflow %
Factory Default: On. Range: On or Off.
Factory Default: On. Range: On or Off.
15 Airflow Update Time
Touch the key to turn the
low level backlight ON or touch
the key to turn OFF.
Touch or
UP
DOWN
NEXT ENTER.
Touch the keys to
set the time in minutes to
update the upstairs and
downstairs airflow.
Touch or
UP/DOWN
NEXT ENTER.
Touch the key to select ON
for airflow control or touch the
key to select OFF to
disable airflow control.
Touch or
UP
DOWN
NEXT ENTER.
The LCD has a low level backlight that can be used as a night light.
For options 20-23, use the installer test o
imum allowable airflow.
n pages 7-8 to
determine the max
Touch the key to select ON
to enable manual airflow
control or touch the key
to select Off so that manual
airflow control is not an option.
Touch or
UP
DOWN
NEXT ENTER.
This option enables the user to select manual airflow control. If off, the
user wont be able to select Manual Airflow Control in the User Manual.
Option
18 Enable Selecting Manual Airflow Control
Factory Default: Off. Range: On or Off.
Touch the keys to
select the maximum allowable
upstairs airflow in heating.
Touch or
UP/DOWN
NEXT ENTER.
Upstairs
Airflow %
Option Heat
Downstairs
20 Maximum Upstairs Airflow in Heating
Factory Default: 150%. Range: 100% to 160%.
The hidden BACK key is used to return to previous options
and is located to the left of the NEXT key.
i
The NEXT key is used to display the next option.
i
The ENTER key is used to save options and return to normal
thermostat operation.
i
Touch the keys to
select the maximum call time
for upstaging.
Touch or
UP/DOWN
NEXT ENTER.
Option
Maximum continuous stage1 call time before upstaging to stage2 .
19 Up Stage Time
Factory Default: 30 minutes Range: 5 to 180 minutes
13 Calibrate Downstairs Temperature Sensor
14 Calibrate Upstairs Temperature Sensor
Touch the keys to
select the cooling temperature
when the space is vacant.
Touch or
UP/DOWN
NEXT ENTER.
Option
Cool
Vacant
12 Vacant Cooling Setpoint
Range: 74 F to 95 F
o o
Factory Default: 80 F.
o
Inside2
Inside
Option
Option
o
Range - +/-5
o
Range - +/-5
Touch the UP/DOWN keys to
change the upstairs (Inside2)
temperature to the temperature
that the user feels is correct.
Touch NEXT or ENTER.
Touch the UP/DOWN keys to
change the downstairs (Inside)
temperature to the temperature
that the user feels is correct.
Touch NEXT or ENTER.
Factory Default: None.
Factory Default: None.
Touch the UP/DOWN keys to
select the heating temperature
when the space is vacant.
Touch NEXT or ENTER.
Option
Vacant
Heat
11 Vacant Heating Setpoint
Range: 44 F to 75 F
o o
Factory Default: 65 F.
o
Touch the UP key to select ON
to turn on smart recovery or
touch the DOWN key to select
OF to turn smart recovery off.
Touch NEXT or ENTER.
Smart recovery initiates a heating or cooling call so that the space is
at temperature when the setback period ends.
Option
Factory Default: Off. Range: On or Off.
10 Smart Recovery
ENTERNEXT
NEXT ENTER
NEXT ENTER
NEXT ENTER
ENTERNEXT
ENTERNEXT
NEXT ENTER
NEXT ENTER
NEXT ENTER

Touch the keys to
select a new Home number.
Touch or ENTER.
UP/DOWN
NEXT
Home
Touch the keys to
select the number of sensors.
Touch or
UP/DOWN
NEXT ENTER.
Option
Select whether 1 or 2 wireless upstairs sensors are used.
26 Setting a New Home Number
Factory Default: 01 Range: 01 to 08
25 Setting the Number of Wireless Sensors
Factory Default: 1. Range: 1 or 2
WARNING! Factory Restore
resets ALL settings.
To access the Test Menu, and the hidden Next key for 7
seconds until the fan test screen (Option 01) appears.
TOUCH HOLD
The Test Menu is used to test the Indoor Fan Operation, Allowable
Heating Airflow Limits and Allowable Cooling Airflow Limits.
The Test Menu can also be used to perform the HERS Total Airflow
test. Option 05-06 activates a cooling call and opens both dampers to
100% enabling the installer to perform the test.
SYSTEM
COOL
AUTO
FAN
TOUCH HOLD and this key for 7 seconds
to access the Installer Options.
Inside
Cool
Set To
ACCESSING THE TEST MENU
Schedule
MODE
AM
Upstairs
Downstairs
Airflow %
Day
MENU
Tu
Auto
Default location is downstairs
indicated by dS.
Option
27 Set Thermostat Location
The default location for the thermostat is downstairs in the living area.
This option enables the installer to select the upstairs bedroom area
as the thermostat location.
Thermostat location upstairs - During daytime operation, the
thermostat displays the downstairs living area temperature.
During nighttime operation, the thermostat displays the
upstairs bedroom area temperature. Setting the location to
upstairs has no effect on options selected.
Option
Touch the UP key to select
upstairs indicated by uS.
Touch NEXT or ENTER.
Touch to exit installer
options. Touch the hidden
key to return to previous
option.
To restore factory settings,
touch the UP key to display
YES then touch ,The
thermostat will restore factory
settings and return to normal
operation.
NEXT
BACK
ENTER.
Option
28 Factory Restore
i
7
Touch the keys to
select the maximum allowable
downstairs airflow in heating.
Touch or
UP/DOWN
NEXT ENTER.
Downstairs
Airflow %
Option Heat
Touch the keys to
select the maximum allowable
downstairs airflow in cooling.
Touch or
UP/DOWN
NEXT ENTER.
Downstairs
Airflow %
Option
Cool
Upstairs
Upstairs
22 Maximum Downstairs Airflow in Heating
Factory Default: 150%. Range: 100% to 160%.
23 Maximum Downstairs Airflow in Cooling
Factory Default: 140%. Range: 100% to 160%.
Touch the keys to
select the maximum allowable
temperature difference between
the upstairs and downstairs.
Touch or
UP/DOWN
NEXT ENTER.
Upstairs
Downstairs
Airflow %
Option
Maximum allowable temperature difference between the upstairs and
downstairs temperatures. When the temperature difference is equal to
or greater than the allowed differential, the airflow is adjusted.
24 Maximum Temperature Differential
Factory Default: 2 F.
oRange: 0 to 10 F o o
21 Maximum Upstairs Airflow in Cooling
Factory Default: 140%. Range: 100% to 160%.
Touch the keys to
select the maximum allowable
upstairs airflow in cooling.
Touch or
UP/DOWN
NEXT ENTER.
Option
Cool
Upstairs
Airflow %
Downstairs
NEXT ENTER
NEXT ENTER
NEXT ENTER
NEXT ENTER
NEXT ENTER
NEXT ENTER
NEXT ENTER
ENTERNEXT
NEXT ENTER

8
05-06 Testing Cooling Airflow Limits
In Option 5, the system is Off.
Touch to go to Option 6 to
activate cooling. Verify the
equipment is operating.
To determine the maximum
allowable upstairs airflow, touch
the key until the airflow is too
great and causes noise or
annoyance. Lower the airflow
using the key until it is
acceptable. This is the maximum
allowable upstairs airflow in
cooling. Record the airflow
value.
NEXT
UP
DOWN
This test is used to determine the maximum allowable upstairs airflow
and maximum allowable downstairs airflow in COOLING.
The dampers have a red and a green LED indicator that indicate the
position and status of the damper.
Green LED On Continuously The damper is in the fully open position.
Green and Red LEDs Alternately Blinking The damper is in a
modulated position between fully open and closed.
Green LED On and Red LED Blinking The damper has lost
communication with the C365 Thermostat and gone to the fully open
position until communication is restored.
Upstairs
Downstairs
Airflow %
ENTER
Cool
Upstairs
Downstairs
Airflow %
ENTER
Cool
Maximum Allowable Upstairs Airflow in Cooling
To determine the maximum
allowable downstairs airflow,
touch the key until the
airflow is too great and causes
noise or annoyance. Increase the
airflow using the key until it is
acceptable. This is the maximum
allowable downstairs airflow in
cooling. Record the airflow value.
DOWN
UP
Maximum Allowable Downstairs Airflow in cooling
Touch to end testing and return to normal thermostat
operation.
ENTER
Upstairs
Downstairs
Airflow % Cool
Enter the maximum airflow limits using Options 20
through 23 of the installer menu.
Damper LED Indicators
Test
Test
NEXT
Test
NEXT
The test can also be used to perform the HERS Total Airflow test. The
test activates a cooling call and opens both dampers to 100%.
Upstairs
Downstairs
Airflow %
ENTER
Heat
To determine the maximum
allowable downstairs airflow,
touch the key until the
airflow is too great and causes
noise or annoyance. Increase
the airflow using the key
until it is acceptable. This is the
maximum allowable downstairs
airflow in heating. Record the
airflow value.
DOWN
UP
Maximum Allowable Downstairs Airflow in Heating
Touch to go to Testing Cooling Airflow Limits.NEXT
03-04 Testing Heating Airflow Limits (cont.)
Test
WiFi model only.
When participating in Demand
Side Management with the utility
company, the thermostat will
display UC (Utility Control) when
the utility company has limited
the cooling setpoint setting in the
thermostat.
Demand Side Management
Inside
Tu
Day
Upstairs
Auto
Downstairs
Airflow %
COOL
Schedule
AUTO
FANMENU MODE
Cool
Set To
SYSTEM
AM
Warranty
This thermostat is warranted to be free of defects due to
workmanship or materials under normal use and service for a
period of 5 years from date of installation and not longer than
6 years from manufacturing date code.
eControls, Inc. 26072 Merit Circle #110 / Laguna Hills, CA 92653
949-916-0945 Fax [phone] www.eControlsUSA.com
eControlseControls
This test is used to verify that the indoor fan is operating correctly.
FAN
FANENTER
01-02 Testing Indoor Fan Operation
NEXT
Test
Test
Upstairs
Downstairs
Airflow %
Upstairs
Downstairs
Airflow %
In Option 1, the Fan is Off.
Touch to go to Option 2
to turn on the indoor fan. Verify
the fan is operating and
delivering airflow to the
upstairs and downstairs..
Touch to go Testing
Heating Airflow Limits.
NEXT
NEXT
This test is used to determine the maximum allowable upstairs airflow
and the maximum allowable downstairs airflow in HEATING.
ENTER
ENTER
Heat
Heat
Maximum Allowable Upstairs Airflow in Heating
03-04 Testing Heating Airflow Limits
NEXT
NEXT
Test
Test
Upstairs
Downstairs
Airflow %
Upstairs
Downstairs
Airflow %
In Option 3, the system is Off.
Touch to go to Option 4
to activate heating. Verify the
equipment is operating.
To determine the maximum
allowable upstairs airflow,
touch the key until the
airflow is too great and causes
noise or annoyance. Lower the
airflow using the key
until it is acceptable. This is the
maximum allowable upstairs
airflow in heating. Record the
airflow value.
NEXT
UP
DOWN
ENTER
NEXT
NEXT
ENTER
NEXT

Inside
Tu
Day
Upstairs
Auto
Downstairs
Airflow %
HEAT
Schedule
AUTO
FANMENU MODE
Heat
Set To
SYSTEM
AM
365
Comfort
UP/DOWN Keys.
SYSTEM MODE Key
OFF, HEAT, COOL or AUTO
Displays the downstairs
(Inside) or upstairs (Inside2)
temperature.
Displays the Thermostat Mode
HOLD, SCHEDULE or VACANT
Displays the time, day and schedule
MORNING, DAYTIME, EVENING
or NIGHT
MENU Key Displays
the User options.
Displays the upstairs airflow
Displays the Airflow Mode
AUTOMATIC or MANUAL
Displays the heating or
cooling temperature
FAN MODE Key
AUTO or ON
Description
System Modes
Airflow Limits
Nighttime Operation
Upstairs Temperature Sensor
Modulating Dampers
Power
Compatible HVAC Equipment
Thermostat Modes
Programs per Day
Program Format
Temperature Override
Airflow Override
Airflow Modes
Fan Modes
The C365 wireless thermostat controls the heating and cooling
system the same as most programmable thermostats. It also
controls the airflow to the upstairs and downstairs using an
upstairs and a downstairs wireless, modulating damper. A
wireless, battery powered temperature sensor located upstairs
monitors the upstairs temperature and the temperature sensor
in the C365 monitors the downstairs temperature.
The C365 adjusts the upstairs and downstairs airflow during
heating and cooling calls to maintain uniform upstairs and
downstairs temperatures.
Off, Heating only, Cooling only, Automatic Heating or Cooling.
Maximum upstairs and downstairs, heating and cooling airflow
limits are set during installation.
Option used when bedrooms are located upstairs. C365 uses
the upstairs temperature sensor to control heating and cooling
calls and directs more airflow upstairs.
One or two Model TS5WL upstairs wireless temperature
sensors can be used.
Round or rectangular dampers using the A80WL2 actuator and
up to 1 inch static pressure.
Operates on 24VAC from the HVAC equipment using the R
and C wires.
Gas/electric equipment with 2-stage heating and 1-stage
cooling or 1-stage heating and 2-stage heating and heat
pumps with 2-stage heating and 2-stage cooling.
Hold, Schedule or Vacant mode.
Morning, Daytime, Evening and Night.
Weekdays and weekend– 5/2.
Up/down keys adjust the setpoint temperature. Temperature
setting is held for 4 hours when adjusted in Schedule mode.
Up/down keys adjust the upstairs/downstairs airflow. Airflow
setting is held for 4 hours when adjusted in Automatic mode.
Automatic or Manual when Manual mode is enabled.
Continuous or Automatic fan operation.
Installer Manual
Model C365W21 and C365W21WF
365
Comfort
Rev F Jun 2017
Displays the downstairs airflow
NEXT Key
Used to advance through options
ENTER Key
Used to save options and
return to thermostat operation
Wireless Technology
Link
e
MODE Key
Selects Thermostat Mode
HOLD, SCHEDULE or VACANT
Includes option for locating thermostat upstairs in the bedroom area.
i
Homes with plaster walls with steel lathe may experience wireless communication interference.