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Step 7 — System Startup and Checkout
INSTALLER TEST
The thermostat is designed with a built-in installer test
capability. It allows easy operation of equipment without
delays or set point adjustments to force heating or cooling.
To enable installer test mode, press and hold the FAN
button for 15 seconds. The control will enter configuration
mode. Continuing to hold the FAN button will cause the
thermostat to enter installer test mode. IN ST will be
displayed in the heat and cool set point location. Pressing
the MODE button will change the system operating mode
to test the heating and cooling equipment. The Auto mode
is not available during installer test mode. If no buttons are
pressed for 15 minutes, the installer test mode will be
terminated. Pressing DONE at any time will exit installer test
mode.
HEATING — The first stage of heating will be energized for
3 minutes, then the first and second stages will turn on for
an additional 3 minutes. During the first stage of heating,
the HEAT ON icon will be displayed. During the second
stage of heating, the "2" next to the "On" will be displayed.
COOLING — Installer test for cooling is the same as
described for heating above. The COOL ON will be
displayed during cooling in installer test mode. When the
mode is set to "em heat," the auxiliary heat will turn on for 3
minutes. The clock display will count down from 180 to 0
during this test.
TO TEST FAN — Pressing the FAN button will switch the
triangle icon between AUTO and ON. While ON is dis-
played, the G output will be energized, turning the fan on.
Allow up to 10 seconds after the button is pressed for the
fan to turn On and Off. On some fan coils, the fan continues
to operate for 90 seconds after the G sifnal is removed.
TO TEST AUXILIARY RELAY (IF EQUIPPED) — Use the
MODE button to set the system to OFF and then press the
SET button to toggle the auxiliary relay. The AUXILIARY
icon will be displayed when the relay is energized. When
the mode is set to HEAT or COOL during the installer test,
the auxiliary relay will be de-energized.
Final Settings
Be sure to press DONE to exit installer setup mode. If the
system is to be left in operation after installation is com-
plete, use MODE button to select between HEAT, COOL,
AUTO, or EM HEAT to provide desired operation.
Default Schedule
If the programmed schedule is to be used, make sure the
triangle icon appears before the FOLLOW SCHEDULE icon.
The default schedule is shown in Table 1. Pressing the
Schedule button will cycle the triangle icon through the
FOLLOW SCHEDULE, HOLD and VacATION selections. If
fixed temperatures are desired, use SCHEDULE button to
turn on the triangle icon next to HOLD. This will maintain
set points, not allowing them to change with programmed
schedule. Use the FAN button to select between AUTO
(fan on only with equipment) and On (fan on continuously)
fan modes.
OPERATIONAL INFORMATION
Five-minute Compressor Timeguard
This timer prevents the compressor from starting unless it
has been off for at least 5 minutes. It can be defeated for 1
cycle by simultaneously pressing the FAN button and the
UP button. It is not active in the installer setup mode.
Cycle Timer
Based on the selection of 2, 4, or 6 cycles per hour, this
timer is set to 30, 15, or 10 minutes. This time must elapse
from the start of one cycle before another cycle can be
defeated for one cycle by simultaneously pressing the FAN
and UP buttons.
Ten-Minute Staging Timer
In multistage heating or cooling this timer prevents any
higher stage from coming on until the previous stage has
been on for 10 minutes. When staging between compressor
and electric heat or between compressor and furnace heat,
the time is configurable. The timer is configurable via
Option 17. This timer is overridden if temperature error is
greater than 5°F (usually due to a large change in desired
temperature) and equipment stages up in 60 second
intervals.
Three-Minute Minimum On Time
When a cooling or heating stage is turned on, it will remain
on for at least 3 minutes. These timers are canceled when
set points are changed.
Heat/Cool Set Point Difference
A minimum difference of 1°F and 6°F is enforced between
heating and cooling desired temperatures (set points). This
deadband is maintained by allowing one set point to
"push" the other to maintain the required minimum differ-
ence. This difference is adjustable via configuration Option
11.
S
C
H
E
D
U
L
W
a
e k
: 6
0 0
A
M
D
y a
: 8
0 0
A
M
E
e v
i n
g n
: 5
0 0
P
M
S
e l
p e
1
: 0
0 0
P
M
Table 1 – Default Program Schedule
Equipment On Indicators — When cooling equipment
is on, a COOL ON icon is displayed. While cooling
equipment operation is delayed by the time guard or cycle
timer, COOL ON will flash. The same is true for HEAT ON
icon. During second stage compressor operation a "2" will
be displayed with the HEAT ON or COOL ON icon. When
the W is energized in a heat pump or emergency heat is
available the "AUXILIARY HEAT ON" icon will be
displayed.
Auto Changeover
When the auto changeover mode is selected, a change from
heat to cool or cool to heat will not occur until an opposite
mode demand has existing for the number of minutes
specified by configuration Option 22. If the set point is
changed, the specified time requirement is deleted.
Emergency Heat Mode
When the system is configured for a heat pump and
EHEAT mode is selected, Y outputs are disabled and W
outputs only are used for heat.
9
E
H
E
A
T
C
O
8 6
F °
8 7
0 6
F °
5 8
8 6
F °
8 7
0 6
F °
2 8
O
L
F °
F °
F °
F °
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