Comfort365 C365T21 Installer Manual Download Page 2

SEPARATE THE C365 SUBBASE

ATTACH THE SUBBASE TO THE WALL

INSTALL TWO AA BATTERIES

Place a slotted screwdiriver in the slots as shown and rotate to 
remove subbase from the C365 housing.

Attach the subbase to an interior wall and about 5-feet above 
the floor as shown using the screws and wall anchors supplied. 
The wires to the dampers, HVAC equipment and the upstairs 
temperature sensor pass through the opening between the 
terminals.

The batteries power the clock when 24VAC power is lost. Slide 
the battery cover downward and install the two AA batteries as 
shown.

Install an R80CT damper in the duct supplying air to the upstairs 
and wire the terminals to the corresponding terminals on the 
C365T. Install a second R80CT damper in the duct supplying air 
to the downstairs and wire it to the C365T.  Each damper uses 
2.4VA of power.

When two or more dampers are required to define the upstairs or 
downstairs zones, the damper may be wired in parallel.  LEDS 
on the damper actuator indicate when the damper is fully open 
(green) or fully closed (red).

Green LED

Red LED

INSTALL UPSTAIRS & DOWNSTAIRS DAMPERS

R

C

WOB

EQUIPMENT

Y

G

Upstairs

Sensor

COM

COM

CLS

CLS

OPN

OPN

Upstairs

Downstairs

Upstairs
Sensor

W2E/Y2

C365T21

Ensure that damper installation does not cause 
obstruction to the damper blade.

WIRING INSTRUCTIONS

Equipment Wiring, Gas/Electric, 2H/1C

Equipment Wiring, Gas/Electric, 1H/2C

Warning!

Use 5-conductor, 18 or 20 gage, thermostat cable.

Use 5-conductor, 18 or 20 gage, thermostat cable.

Turn the power to the HVAC equipment off before wiring.

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

2

!

Summary of Contents for C365T21

Page 1: ...he 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...

Page 2: ...uired to define the upstairs or downstairs zones the damper may be wired in parallel LEDS on the damper actuator indicate when the damper is fully open green or fully closed red Green LED Red LED INSTALL UPSTAIRS DOWNSTAIRS DAMPERS R C WOB EQUIPMENT Y G Upstairs Sensor COM COM CLS CLS OPN OPN Upstairs Downstairs Upstairs Sensor W2E Y2 C365T21 Ensure that damper installation does not cause obstruct...

Page 3: ...C365T21 Downstairs Thermostat Model TS5 Upstairs Temperature Sensor Model R80CT XX Downstairs Damper Y Y W O or B C C R R WIRING DIAGRAM C365T21 Upstairs Sensor WIRING INSTRUCTIONS Cont Use 3 conductor 18 or 20 gage thermostat cable to wire from the C365 Thermostat to the upstairs and downstairs dampers There are separate terminals for the upstairs and the downstairs dampers Multiple dampers can b...

Page 4: ...n to thermostat operation CHANGE THE DAY OF THE WEEK Inside Tu Day Upstairs Auto Downstairs Airflow COOL Schedule AUTO FAN MENU MODE Cool Set To SYSTEM AM Touch here to change the time and day of the week We ENTER AM NEXT ENTER AM Press the touchscreen with your fingertip only using a firm touch Do not use a sharp object such as a pen or pencil Inside Tu Day Upstairs Auto Downstairs Airflow COOL S...

Page 5: ...cription 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 o 0 Cooling On 1 above setpoint Off at setpoint Heating On1 below setpoint Off at setpoint o o o o 1 Cooling On 1 above setpoint Off 5 below setpoint Heati...

Page 6: ...NEXT ENTER Touch the keys to set the time in minutes to update the upstairs and downstairs airflow Touch or UP DOWN NEXT ENTER Option NEXT ENTER This is the frequency in minutes that the damper position is updated 14 Calibrate Upstairs Temperature Sensor Factory Default None o Range 5 15 Airflow Update Time Factory Default 2 Minutes Range 1 to 20 Minutes Touch the UP DOWN keys to change the minimu...

Page 7: ... Airflow in Cooling Factory Default 140 Range 100 to 160 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 24 Maximum Temperature Differential Factory Default 2 F o Range 0 to 10 F o o 25 Factory Restore WARNING Factory Restore resets ALL settings WiFi model only When participating in Demand S...

Page 8: ... 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 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...

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