Accessory RT6P Manual (2019)

Friedrich Air Conditioning Co.
10001 Reunion Place, Suite 500, San Antonio, TX 78216
P [phone]
http://www.friedrich.com
Setting the Time and Day of the Week
5. Press the FAN (right) button once to select day of the week
(TODAY flashing).
Press the up or down button to select current day of the week.
Note: At any time, press the SYS (left) button to return to the previous
screen or press the FAN (right) button to advance to the next screen.
Press the PROG button in for 2 seconds to lock values into memory and return to the OFF mode or
press the FAN (right) button once to enter programming.
3. Time displays (hour flashing).
Press the up or down button to adjust the hour.
2. Press and hold the PROG button (SYS (left) and FAN (right) buttons
pressed simultaneously) in for 6 seconds.
1. Press the SYS (left) button until you are in the OFF mode.
The time and day of the week must be set for your program schedule to operate correctly.
4. Press the FAN (right) button once to select minutes (minutes flashing).
Press the up or down button to adjust the minutes.
Programming (continued)
From any of the screens above, you can press the FAN (right) button to begin entering your program
schedule. The days shown on the display will all be programmed simultaneously.
Once the FAN (right) button is pressed, MORN blinks.
Use the up or down button to select a different period (MORN, DAY, EVE, NITE).
Press FAN (right) button to advance to the next screen. Transition time hour blinks.
Use the up or down button to select a different hour.
Press FAN (right) button to advance to the next screen. Transition time minutes blink.
Use the up or down button to select different minutes.
Press FAN (right) button to advance to the next screen. Heat set temperature displays.
Use the up or down button to adjust the heat set temperature.
Press FAN (right) button to advance to the next screen. Cool set temperature displays.
Use the up or down button to adjust the cool set temperature.
Press FAN (right) button to advance to the next screen. Programmable fan screen displays.
Use the up or down button to select:
Choose: Off – Programmable fan disabled >OR< On – Indoor fan on continuously
Note: Programmable fan operates in Program mode only.
Repeat above steps to program the four periods per day.
When the program schedule is complete, press and hold the PROG button (SYS and FAN buttons
pressed simultaneously) in for 2 seconds to return to the OFF mode.
Programming
Program Overview
This programmable thermostat has four periods (MORN, DAY, EVE, NITE) that are customizable for
each day of the week. Each period will have a start time, heat temperature, cool temperature and
programmable fan option. The thermostat monitors the day and time, while maintaining the specific
conditions you have chosen for each period in your program.
Setting the program schedule:
1. Press the SYS (left) button until you are in OFF mode.
2. Press and hold the PROG button (SYS and FAN buttons pressed
simultaneously) for 6 seconds.
3. Press the FAN (right) button 3 times.
4. SUN thru SAT are blinking.
From this screen you have 2 options:
1. Press the FAN (right) button to begin programming all 7 days at one time, or
2. Press the
up
button to see the other programming options.
Note: The days of the week shown on the display will be programmed simultaneously.
The screens are listed below.
Screen 1 SUN MON TUE WED THU FRI SAT
Screen 2 MON TUE WED THU FRI
Screen 3 MON
Screen 4 TUE
Screen 5 WED
Screen 6 THU
Screen 7 FRI
Screen 8 SUN SAT
Screen 9 SAT
Screen 10 SUN
Troubleshooting
Symptom Remedy
No display Check for 24 VAC at thermostat; display is blank when 24
VAC is not present.
All thermostat buttons are
inoperative
Verify 24 VAC is present; unit locks out when 24 VAC is not
present
No response with first button
press
First button press activates backlight only
Thermostat turns on and off too
frequently
Adjust temperature differential (see Configuration Mode
Settings 3 & 4)
Fan runs continuously Press FAN (right) button to turn fan off
Room temperature is not
correct
Calibrate thermostat (see Configuration Mode Setting 10)
Heat or Cool not coming on Verify wiring is correct, gently pull on each wire to verify
there is a good connection at terminal block
HEAT blinking In heat set point screen, this is normal operation
COOL blinking In cool set point screen, this is normal operation
Not following program schedule Verify time is correct, check am/pm, verify it is in program
mode (PROG displays)
“PROG” on display Press both SYS (left) and Fan (right) to enter or exit the
program mode
Problem not listed above Press Reset button once*
* Reset Button Function: Display is refreshed, configuration settings are unchanged.
MONDAY
thru
SUNDAY
Factory Preprogramming
MORN 6:00 AM DAY 8:00 AM EVE 6:00 PM NITE 10:00 PM
HEAT
70°F
HEAT
62°F
HEAT
70°F
HEAT
62°F
COOL
78°F
COOL
85°F
COOL
78°F
COOL
82°F
FAN
Off
FAN
Off
FAN
Off
FAN
Off
The thermostat comes pre programmed with the following schedule:
THURSDAY
4
FRIDAY
5
SATURDAY
6
SUNDAY
7
Personal Program Schedule
MORN DAY EVE NITE
HEAT HEAT HEAT HEAT
COOL COOL COOL COOL
FAN FAN FAN FAN
MONDAY
1
TUESDAY
2
WEDNESDAY
3
Use the following personal program schedule to record your settings:
MORN DAY EVE NITE
HEAT HEAT HEAT HEAT
COOL COOL COOL COOL
FAN FAN FAN FAN
MORN DAY EVE NITE
HEAT HEAT HEAT HEAT
COOL COOL COOL COOL
FAN FAN FAN FAN
MORN DAY EVE NITE
HEAT HEAT HEAT HEAT
COOL COOL COOL COOL
FAN FAN FAN FAN
MORN DAY EVE NITE
HEAT HEAT HEAT HEAT
COOL COOL COOL COOL
FAN FAN FAN FAN
MORN DAY EVE NITE
HEAT HEAT HEAT HEAT
COOL COOL COOL COOL
FAN FAN FAN FAN
MORN DAY EVE NITE
HEAT HEAT HEAT HEAT
COOL COOL COOL COOL
FAN FAN FAN FAN
LIAF237-1
Testing the Thermostat
Once the thermostat is configured, it should be thoroughly tested.
 CAUTION! : Do not energize the air conditioning system when the outdoor temperature is
below 50 degrees. It can result in equipment damage or personal injury.
Heat Test
1. Press SYS (left) button until heat mode is displayed.
2. Adjust the set temperature so it is 5 degrees above the room temperature.
3. Heat should come on within a few seconds.
4. Adjust the set temperature 2 degrees below the room temperature and the
heat should turn off. There may be a fan delay on your system.
Note: For heat pumps, there is a four-minute delay to protect your compressor after it turns off.
To bypass the compressor time delay, go to OFF mode for 5 seconds.
Cool Test
1. Press SYS (left) button until cool mode is displayed.
2. Adjust set temperature so it is 5 degrees below room temperature.
3. A/C should come on within a few seconds.
4. Adjust the set temperature 2 degrees above the room temperature and
the A/C should turn off. There may be a fan delay on your system.
Note: There is a four-minute time delay to protect the compressor after it turns off. To bypass the
compressor time delay, go to OFF mode for 5 seconds.
Fan Test
1. Press FAN (right) button. Fan displays. Indoor fan turns ON.
2. Press FAN (right) button. Indoor fan turns OFF.
Heat Set Point
• Use the SYS button to select Heat Mode. Press the up or down button to
view the current heat set point larger on the display. When the large set
point is displayed, the HEAT icon will blink. The up or down buttons can
be used to adjust the set point. After 5 seconds of inactivity
the screen will display the room temperature and the HEAT
icon will not blink.
COOL icon
will blink.
Cool Set Point
• Use the SYS button to select Cool Mode. Press the up or down button to
view the current cool set point larger on the display. When the large set
point is displayed, the COOL icon will blink. The up or down buttons can
be used to adjust the set point. After 5 seconds of inactivity
the screen will display the room temperature and the COOL
icon will not blink.
HEAT icon
will blink.
Set Point Adjustment
Heat & Cool Set Points
• Use the SYS button to select Heat/Cool Mode. Press the up or down
button to adjust the current set points. When the set points are displayed
for adjustment, the ROOM temperature leaves the screen. The up or
down buttons can be used to adjust the set points. After 5 seconds of
inactivity, the screen will display the Heat and Cool set points and the
room temperature.
Heat Mode
• In this mode, the thermostat controls the heating system. When the heat
outputs, the flame icon appears on the display.
Note: For heat pumps, there is a four minute delay for your
compressor to restart after it has turned off. To bypass the
compressor time delay, go to OFF mode for 5 seconds.
Cool Mode
• In this mode, the thermostat controls the cooling system. When the
cooling outputs, the snowflake icon appears on the display.
Note: There is a four minute delay for your compressor to restart
after it has turned off. To bypass the compressor time delay, go
to OFF mode for 5 seconds.
OFF Mode
• In this mode, the thermostat will not turn on the heating or cooling
devices
Note: The indoor fan can be turned on manually in every operating
mode by pressing the FAN (right) button. The word FAN shows
on the display and the fan icon appears when the fan operates.
Program Mode
• In this mode, the program function is on (PROG displays), and the
thermostat will automatically be controlled by the set program schedule.
Program mode can function with heat mode, cool mode, or heat & cool
mode. The program schedule can be overridden by changing the set
temperature (up or down button). After 2 hours, the program schedule
will automatically be resumed. To manually return to the program
schedule, press the PROG button twice.
Operating Modes
There are four possible operating modes for the RT6P. Off, Heat, Cool and Heat/Cool modes are
accessed by pressing the SYS (left) button. The RT6P also lets you operate in any mode as a
programmable thermostat.
Cool and Heat Mode (Auto Changeover)
• In this mode, the thermostat controls the cooling and heating systems,
automatically changing over from one to the other as needed.
• The timing display alternates with the set temperature every 10 seconds
in the cool and heat mode.
PROG