Carrier 53DFS250-FS - Manual (Page 5)

Advanced Setup
Adjust the minimum
allowable cool set point
when security is in effect.
(Step 10 only appears
it Step 8 is not 0.)
(35 to 99 F)
I n
L U
r r
ÚZf
Select thermostat
operation in degrees
Fahrenheit or Centigrade.
F
c
f
Select the display back­
light always
On, or Off
after 8 seconds.
n-nn
u-uy
Adjust the preoccupancy
fan purge timer.
0-3 hours.
0:00= off
Select the unit ID for
‘Soft Start'. This is used
In multiple installs to
stagger equipment turn
on times. 0 = off.
Each Increment = 30 second delay,
(0 to 99)
t nr
j u r
n
u
NO
I c
ON
■
11
■ ■■■
Ves
Select the sensor type:
Yes = Outside or Duct
sensor
No =Automatic Detection
of Remote Sensor
No
To view Outside or Duct temperature
press and hold Mode 2 seconds, min.
The thermostat will not control to Outside or Duct Sensors.
Press the Mode button. While holding the Mode,
press the Override button leave the Setup screens.
If no buttons are pressed, the display will leave the
set screens after 30 seconds.
Press
MODE
o
o
Advanced Setup Table
STEP NO. DESCRIPTION RANGE
FACTORY
DEFAULT
1 Time of day clock set 24 hour 12:00 Am
2 Day of the week Su - Sa Mo
3 Fan Mode Auto / ill Auto
4 Heat Pump On or Off Off / On Off
5 Deadband or Temperature swing 1 -6 2
6
Forced minimum difference
heat/cool
0-6 2
7 Cydes per hour d , d 1 , 2 - 6 6
8 Security Levels 0-3 0
9 Maximum allowable Heat set point 35- 99 F 80 F
10 Minimum allowable Cool set point 35 - 99 F 65 F
11 Fahrenheit or Centriprade F/C F
12 Thermogiow™ Backlight Off / On On
13 Fan Purge timer 0:00-3:00 0:00
14 Soft Start 0 - 9 9 0
1 5 Remote Sensor Yes / No No
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.
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 Stop 6, on page 4. This mini­
mum 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. If
fan is in Off Mode it will only run if there is a heating
or cooling demand during programmed unoccupied
periods.
OVERRIDE — As explained on page 2, pressing
the Override button during a programmed, Unoccu­
pied period will force the thermostat into Occupied
1, temporarily, up to 4 hours. If the Override button
is pressed during an Occupied period, the thermo­
stat will be forced into Unoccupied and the occu­
pied period (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
Override ends,
FAN PURGE TIMER — When this feature is acti­
vated, the fan will turn on during Unoccupied at a
preset amount of time prior to Occupied 1. This pre­
occupancy fan purge timer may be set as instructed
on this page, Step 13, 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 dis­
abled. To disable, or ‘lock’ the keypad, press and
hold the Mode button. While holding the Mode but­
ton, simultaneously press the Up and Down but­
tons. Locked will appear on the display.
Press all 3 for
Keypad Lockout
U J
J J
To unlock the buttons, again press and hold the
Mode button. While holding the Mode button, simul­
taneously press the Up and Down buttons. Locked
will disappear from the display.
DRY CONTACT SWITCH — The terminals are
‘normally 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 one 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 thermostat is forced into Occu­
pied 1 via the Dry Contact closure, the icon
Occupied 1 will blink.
CK1
GND
Page 5