About Advanced Features And Operation - Bryant PROGRAMMABLE DIGITAL TERMOSTAT OM 17-101 Owner's Manual

Advanced Setup Table
STEP NO. DESCRIPTION
1 Time of day clock set
2 Day of the week
3 Heat Pump
4 Deadband or Temperature swing
Forced minimum difference
5
heat/cool
6 Cycles per hour
7 Security Levels
8 Maximum allowable Heat set point 35 - 99 F
9 Minimum allowable Cool set point
10 Fahrenheit or Celsius
11 Thermoglow™ backlight
12 Fan Purge timer
13 Soft Start

About Advanced Features and Operation

• CLOCK BACKUP — In the event of a power loss, the
thermostat internal clock will continue to keep proper
time for a minimum of 48 hours without external power
or batteries.
• TWO-STAGE OPERATION — The Second Stage of
heat (Heat pump models only) is turned on when (1)
the first Stage has been on for a minimum of two min-
utes, and (2) the temperature spread from the set
point is equal to or greater than: the set point plus the
deadband, plus 2 degrees.
Heating
Dead
Band
2 degrees 2 degrees
Heat
2nd Stage 1st Stage
turn on turn on Set Point Set Point
3rd Stage 2nd Stage 1st Stage
High Med Low
• MINIMUM HEAT/COOL SET POINT DIFFERENCE —
The Heat and Cool set points will not be allowed to
come any closer to each other than the value set in
Advanced Setup Step 5, on page 4 . This minimum
difference is enforced during Auto changeover and
Program On operation.
• ENERGY SAVING SMART FAN — If Fan On is
selected, the fan will run continuously at all times,
except in Off, and will only run if there is a heating or
cooling demand in Unoccupied periods.
• OVERRIDE — As explained on page 3 , pressing the
Override button during a programmed, Unoccupied
period will force the thermostat into Occupied 1, tem-
porarily, up to 4 hours. If the Override button is
pressed during an Occupied period, the thermostat
will be forced into Unoccupied and the occupied num-
ber (1,2 or 3) , it was forced out of will be turned off,
only for that day.
During Override periods the set points may be
adjusted, but they will not be remembered after Over-
ride ends.
• HEAT — First Stage = Heat Pump. Second Stage =
Heat Pump and Electric Heat.
• FAN PURGE TIMER — When this feature is activated,
the fan will turn on during Unoccupied at a preset
amount of time prior to Occupied 1. This preoccu-
pancy fan purge timer may be set as instructed on
page 4, Step 12 , from 0 to 3 hours. 0 = this feature
turned off.
• KEYPAD LOCK — To prevent unauthorized use of the
thermostat, the front panel buttons may be disabled.
To disable, or 'lock' the keypad, press and hold in the
Mode button. While holding the Mode button in,
RANGE FACTORY DEFAULT
24 hour 12:00 Am
Su - Sa M
Off / On Off
1 - 6 F 2 F
0 - 6 F 2 F
d, d1, 2 - 6 6
0 - 3 0
80 F
35 - 99 F 65 F
F / C F
Off / On On
0:00 - 3:00 0:00
0 - 99 0
Cooling
Dead
Band
2 degrees 2 degrees
Cool
Fan Speeds
Low Med High
simultaneously press the Up and Down buttons. The
Locked icon will appear on the display.
To unlock the buttons, again press and hold the Mode
button. While holding the Mode button in, simulta-
neously press the Up and Down buttons in together.
The Locked icon will disappear from the display.
• DRY CONTACT SWITCH — The terminals are 'nor-
mally open'. Closing or completing the circuit will
cause the thermostat to enter Occupied 1. This feature
allows an external device such as a Central Time
Clock, Occupancy Sensor, or a Telephone activated
device to force 1 or more thermostats into Occupied 1.
For the Dry Contact to work the thermostat must be in
Program On. Set Occupied 1 to Off for all 7 days, so
the Contact closure will be in control. When the ther-
mostat is forced into Occupied 1 via the Dry Contact
closure, the icon Occupied 1 will blink.
• HOLIDAY MODE — This feature forces the thermostat
into Unoccupied for a preset duration, up to 99 days.
The Holiday setup display is entered as follows:
1
HOLIDAY
2
The thermostat will enter the Holiday mode when the
clock crosses midnight.
During Holiday mode Unoccupied set points are
enforced.
The Override button is active during Holiday mode. It
will override to Occupied 1 settings up to 4 hours then
return to Holiday mode. The Dry Contact Switch is
ignored.
The thermostat will exit Holiday mode at midnight of
the final programmed day. To terminate Holiday imme-
diately, enter the Holiday setup screen and select 0.
• SOFT START — This feature is utilized in multiple
thermostat installations controlled by the Dry Contact
terminals. Assigning a unique Soft Start number to
each thermostat will stagger the turn on times, even
though the Dry Contact closes, for all the thermostats
connected, at the same time. Each Soft Start number
Page 5
:
Program On
Pm
unoccupied
W
ON
Locked
CK1
GND