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12. Turn ON power to unit.
On power up, all display segments will light for 5 sec. For the next
5 sec, a 2-digit code appears on large display which identifies
thermostat configuration:
1. AC—for 1-speed air conditioner
2. HP—for 1-speed heat pump
3. A2—for 2-speed air conditioner
4. H2—for 2-speed heat pump
5. HS—for intelligent heat staging with FK, FV, 40FKA Fan
Coil and 1-speed heat pump
When this identifier disappears, normal operation begins. The
MODE control should be set to OFF and FAN control to AUTO,
so equipment does not start until further configuration and check-
out is completed.
Step 4—Set Thermostat Configuration
Configuration options, like DIP switch settings, are intended to be
selected at installation and normally are not modified by the
homeowner. These options are not discussed in the Homeowner’s
Manual and therefore must be made as part of the installation. A
special procedure allows entry into the configuration mode. While
in configuration mode, 7 selections can be made. A description of
each of these and how to use the configuration mode follows.
CONFIGURATION OPTIONS — SUMMARY:
Option 01—Anticipator adjustment
Option 02—Clean filter timer adjustment
Option 03—Fahrenheit or Celsius operation
Option 04—Enable fan (G) ON with any heat (W)
Option 05—07—Not applicable
Option 08—Auxiliary heat lockout temperature adjustment
Option 09—12—Not applicable
Option 13—Room temperature offset adjustment
Option 14—Not applicable
Option 15—Enable AUTO mode
TO ENTER CONFIGURATION MODE:
Press and hold FAN button for approximately 10 sec until COOL
set point display indicates a flashing 01. The thermostat is now in
configuration mode. It will automatically exit this mode if no
button is pressed for 3 minutes. Pressing END button will exit
configuration mode immediately.
WHILE IN CONFIGURATION MODE:
The upper small (COOL set point) display indicates selected
option number and large display indicates selection made within
that option. One of these will be flashing. The up and down buttons
are used both to move between available options and to make
selection for each option. When option number (small display) is
flashing, up and down buttons adjust it, moving between available
option numbers. After desired option number has been selected,
press SET TIME/TEMP button once. The large display will now
flash, indicating that up and down buttons now control available
choices within that option. Each press of SET TIME/TEMP button
switches between available option (small display) and available
selections within each option (large display).
CONFIGURATION OPTIONS — SELECTION:
Option 1—Anticipator Adjustment
This adjustment controls sensitivity and cycle rate of thermostat.
Higher numbers decrease sensitivity and slow cycle rate. Lower
numbers increase sensitivity and cycle rate. However, a limiting
feature will not allow more than 4 cycles per hr, regardless of
setting. Anticipator values can range from 1 to 9. Factory default
is 3. This default setting will provide optimum performance in
nearly all installations. Try it first. Do not change setting unless
there is evidence of the 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 draw. There is also no droop with this thermostat.
Regardless of setting and number of stages, both heating and
cooling will control to their respective set points.
TO ADJUST:
1. Enter configuration mode if not already there. See above. The
upper small (COOL set point) display will be flashing 01. If
not, use up and down buttons to move it to 01.
2. Press SET TIME/TEMP button once to flash current selection
of 1, 2, 3, 4, 5, 6, 7, 8, or 9 on large display. Factory default
is 3.
3. Use up and down buttons to move between available choices.
4. Press SET TIME/TEMP button again to flash upper small
display for selection of another option, or press END to exit
configuration mode.
Option 2—Clean Filter Timer
Select hours of blower operation (heating, cooling, or fan) before
CLEAN FILTER icon is displayed. With OFF selected, icon will
never come on, disabling this feature. Time selection can range
from 400 to 3600 hr by selecting numbers 1 through 9. (Time is
400 X number selected.) Factory default is 2 (800 hr). Recom-
mended selections are: disposable filter—400 to 800 hr, media
filter—1200 to 1600 hr, or electronic air cleaner—1600 to 2400 hr
of blower operation.
TO SELECT OR ADJUST:
1. Enter configuration mode if not already there. See above. Use
up and down buttons to make small (now flashing) display
indicate 02.
2. Press SET TIME/TEMP button once to flash the current
selection of OF, 1, 2, 3, 4, 5, 6, 7, 8, or 9 on large display.
Factory default is 2.
3. Use up and down buttons to move between available choices.
→ Table 1—Model Selection and Wiring Diagram Chart
INDOOR
UNIT
AIR CONDITIONER HEAT PUMP
1 Speed 2 Speed 1 Speed 2 Speed
1-Stage
Furnace
Model AC
See Fig. 2
Model 2S
See Fig. 8
Requires Dual Fuel Ther-
mostat
Model 2S
See Fig. 11
2-Stage
Furnace
Model AC
See Fig. 3
Model HP
See Fig. 4
Model 2S
See Fig. 9
Requires Dual Fuel Ther-
mostat
Model 2S
See Fig. 12
Typical Fan Coil
Model AC
See Fig. 5
Model HP
See Fig. 6
Model 2S
See Fig. 10
Model HP
See Fig. 7
Model 2S
See Fig. 13
Variable-Speed
(FK, FV, 40FKA)
Fan Coil
Model AC
See Fig. 15
Model HP
See Fig. 16
Model 2S
See Fig. 17
Model 2S
See Fig. 14
Model 2S
See Fig. 18
3
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