Friedrich RT2 Thermostat User Manual


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V. THERMOSTAT CONFIGUR ATION
This thermostat has been carefully confi gured at the factory to provide
optimum operation for most installations. The settings programmed
into it at the factory should NOT be changed unless determined to
be absolutely necessary by a qualifi ed HVAC contractor.
VI. CHANGING THERMOSTAT CONFIGUR ATION
If it has been determined that re-confi guration of the thermostat
is required, the following instructions will assist the professional
HVAC installer in accomplishing this task:
While in confi guration mode, three option choices can be made:
A
Anticipator Value Adjustment
d
Display temperature Fahrenheit/Celsius Selection
o
F
Offset Adjustment for Room Temperature
C
r
Cycle rate. Maximum number of cycles per hour
TO ENTER THE CONFIGURATION MODE:
Press and hold the FAN button for approximately 10 sec until
room temperature disappears and the display reads
“A"
. You
are now in the confi guration mode.
NOTE: If the FAN button is pressed again or if no button is
pressed for 2 minutes, the thermostat will exit the confi gura-
tion mode and return to normal operation. To re-enter the
confi guration mode, the FAN button must be pressed and
held for 10 sec. again.
WHILE IN CONFIGURATION MODE, THE FOLLOWING
OPTIONS ARE AVAILABLE:
A
. ANTICIPATOR - Value Adjustment
This adjustment controls the sensitivity and cycle rate of the
thermostat. Higher numbers decrease the sensitivity and slow
the cycle rate. Lower numbers increase the sensitivity and
increase cycle rate. However, a limiting feature will not allow
more than 4 equipment cycles per hour, regardless of setting.
Values can range from 1 to 3. Factory default setting is 2. This
default selection will provide optimum performance in nearly
all installations. Try it fi rst. Do not change setting unless there
is evidence of need to do so. Unlike conventional anticipators,
this setting is not determined by current draw. There is no need
to measure, know, or compensate for current.
TO ADJUST:
1. Enter confi guration mode (if not already there).
2. Use up and down buttons to display
A
3. Press MODE button once to display current value.
4. Use up and down buttons to move between values.
5. Press MODE button to return to
A
. Up and down but-
tons now move between option choices
A,
d
-,
etc. or
press FAN button to exit confi guration mode.
d
. FAHRENHEIT/CELSIUS Selection
This selection operates the thermostat in either Fahrenheit or
Celsius.
TO SELECT:
1. Enter confi guration mode (if not already there).
2. Use up and down buttons to display
d
3. Press MODE button once to display current selection of
F
or
C
.
4. Use up and down buttons to change between
F
and
C
.
5. Press MODE button to return to
d
. Up and down buttons
now move between option choices; or press FAN button
to exit confi guration mode.
o
F
. ROOM TEMPERATURE OFFSET ADJUST Selection
The selected number is the number of degrees, plus or
minus, which will be added to the actual temperature. The
numbers can range between -5 and +5. Factory default is
0. This adjusted value will be used as actual temperature for
both display and control action. The effect is that a positive
number selection will make the room temperature lower, and
vice versa. The thermostat is calibrated within an accuracy
of plus or minus 2 degrees when shipped from the factory; this
adjustment will provide the best accuracy when set to 0.
TO SELECT:
1. Enter confi guration mode (if not already there).
2. Use UP and DOWN buttons to display
o
F
.
3. Press MODE button once to display offset value.
4. Use UP and DOWN buttons to select a value between
-5
and
5
.
5. Press MODE button to return to
o
F
. UP and DOWN
buttons now move between option choices; or press
FAN button to exit confi guration Mode.
C
r
. CYCLE RATE Selection
This selection selects the cycle rate maximum in cycles per
hour.
TO SELECT:
1. Enter confi guration mode (if not already there).
2. Use up and down buttons to display
C
r
3. Press MODE button once to display current selection
3
to
6
.
4. Use up and down buttons to change.
5. Press MODE button to return to
C
r
. Up and down but-
tons now move between option choices or press FAN
button to exit confi guration mode.
o
P
. OPERATING MODE – H/C or HP operation
The selected mode (H/C or HP) will operate the thermostat
as a Heat Cool or as a Heat Pump thermostat.
TO SELECT:
1. Enter confi guration mode (if not already there).
2. Use UP and DOWN buttons to display
o
P
.
3. Press MODE button once to display operating mode.
4. Press UP and DOWN buttons to change between
HC
and
HP
.
5. Press MODE button to return to
o
P
. UP and DOWN but-
tons now move between option choices; or press FAN
button to exit confi guration Mode.
NOTE: After changing an y thermostat confi guration
settings, ALWAYS re-check the thermostat in ALL
modes to verify proper operation.
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