Carrier 33CS250-01 Owner's Manual
Carrier 33CS250-01 Owner's Manual

Carrier 33CS250-01 Owner's Manual

Commercial programmable thermostat

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IMPORTANT: Read entire instructions before pro-
gramming the thermostat.

GENERAL

Carrier's 7-day, commercial, programmable thermostats
are wall-mounted, low-voltage thermostats which maintain
room temperature by controlling the operation of an HVAC
(heating, cooling and ventilation) system. Separate heating
and cooling set points and auto-changeover capability allow
occupied and unoccupied programming schedules for en-
ergy savings.
All thermostats allow up to 3 occupied and one unoccu-
pied time/temperature setting to be programmed per
24-hour period. Each thermostat stores programs for 7 in-
dependent days. Batteries are not required. During power in-
terruption the internal NEVERLOST™ memory stores pro-
grams for an unlimited time.
IMPORTANT: The thermostat has a configurable se-
curity level. If certain functions are not available (chang-
ing set points, changing programming schedules), the
thermostat security level may be configured to ex-
clude those functions. Call the installer to reconfigure
the security level.

CONFIGURATION

Thermostat Display —
cated in the center of the thermostat. See Fig. 1. The fol-
lowing information can be displayed on the screen:
• mode (OFF, HEAT, COOL, AUTO, or PROGRAM ON)
• fan setting (FAN ON or blank)
• override indication
• room temperature
• desired temperature
• service filter indicator
• time of day
• day of the week
• schedule period (Occupied 1, 2, or 3; or Unoccupied)
• setup indicator (programming mode)
• lock indicator
• start/stop indicator (schedule period program mode)
Heat or Cool Indicator —
located on the bottom left cover of the thermostat. See
Fig. 2. The light will be red if the thermostat is in Heating
mode. The light will be green if the thermostat is in Cooling
mode.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1
4
PC 111
Tab
11a 13a
Owner's Manual
Part Number 33CS250-01
The thermostat display is lo-
A Heat or Cool indicator is
Catalog No. 533-318
Printed in U.S.A.

Programmable Thermostat

Fig. 1 — Thermostat Display
Thermostat Front Panel Buttons —
stat has buttons on the front cover which are used to raise or
lower the desired set point and override the current program.
See Fig. 2.
SET POINT BUTTONS — The UP ARROW and DOWN
ARROW buttons will raise or lower the current desired tem-
perature set point. If the thermostat is in AUTO mode, press-
ing the UP ARROW or DOWN ARROW buttons will adjust
both the heating heating and cooling set points. Pressing the
UP ARROW or DOWN ARROW buttons in Cooling mode
will adjust only the cooling set points. Pressing the UP AR-
ROW or DOWN ARROW buttons in Heating mode will ad-
just only the heating set points. The UP ARROW and DOWN
ARROW buttons are also used in programming mode.
OVERRIDE BUTTON — The Override button is used to
force the thermostat from Unoccupied mode into the Occu-
pied 1 mode comfort settings. The Override period will be
set at 30 minutes. The thermostat will then return to Unoc-
cupied mode. To increase the amount of time in Override
mode, press the Override button again. Thirty minutes of over-
ride time will be added for each time the Override button is
pressed up to a maximum of 4 hours. After the 4-hour limit
has been reached, press the Override button again to cancel
override mode.
While in Override mode, the Override icon and the Oc-
cupied 1 icon will be displayed on the thermostat. The time
of day and the minutes remaining in Override mode will al-
ternate on the thermostat display.
The set points are adjustable with the UP ARROW and
DOWN ARROW keys during Override mode.
Form 33CS-4SO
Pg 1
33CS
Commercial
The thermo-
12-97
Replaces: New

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Summary of Contents for Carrier 33CS250-01

  • Page 1: Programmable Thermostat

    A Heat or Cool indicator is located on the bottom left cover of the thermostat. See Fig. 2. The light will be red if the thermostat is in Heating mode. The light will be green if the thermostat is in Cooling mode.
  • Page 2 NOTE: If the thermostat is in Occupied mode and the Over- ride button is pressed, the thermostat will go into Unoccu- pied mode immediately. The thermostat will remain in Un- occupied mode until the next Occupied start time. Thermostat Programming Buttons —...
  • Page 3 12. After all the times and set points for each day have been entered, press the Program button to finish entering the schedule. NOTE: The thermostat will continue to follow the schedule until a new one is entered. • If only one occupied schedule is selected, the Occupied 2 and 3 schedules are skipped.
  • Page 4 OPERATION The Mode button selects the operating mode of the ther- mostat. If OFF is selected, the thermostat will not enter Heat- ing or Cooling mode. If HEAT is selected, the thermostat will only enter Heating mode (if the room temperature is below the heating set point).
  • Page 5 OF THE Occupied 1 WEEK Start / Stop / Heat / Cool Monday Tuesday Wednesday Thursday Friday Saturday Sunday NOTE: The cooling temperature set point must be higher than the heating temperature set point. Table 1 — Daily Schedule Planner SCHEDULE Occupied 2 Start / Stop / Heat / Cool...
  • Page 8 Copyright 1997 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 PC 111 Catalog No. 533-318 Printed in U.S.A. Form 33CS-4SO Pg 8 12-97 Replaces: New...

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