Carrier 33CS250-01 owner manual General, Configuration

33CS Commercial Programmable Thermostat

Owner's Manual

Part Number 33CS250-01

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 con®gurable se- curity level. If certain functions are not available (chang- ing set points, changing programming schedules), the thermostat security level may be con®gured to ex- clude those functions. Call the installer to recon®gure the security level.

CONFIGURATION

Thermostat Display Ð The thermostat display is lo- 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 ®lter 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 Ð 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.

Fig. 1 Ð Thermostat Display

Thermostat Front Panel Buttons Ð The thermo- 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 Ð 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 Ð 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.

Manufacturer reserves the right to discontinue, or change at any time, speci®cations or designs without notice and without incurring obligations.

Book	1	4	PC 111	Catalog No. 533-318	Printed in U.S.A.	Form 33CS-4SO	Pg 1	12-97	Replaces: New
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