Debonair®

33CS Flush-Mounted Flatstat Commercial Programmable Thermostat

Owner’s Manual

Part Number 33CS250-FS and 33CS220-FS

IMPORTANT: Read entire instructions before program- ming the thermostat.

GENERAL

Carrier’s 7-day, commercial, programmable thermostats are flat, wall-mounted, low-voltage thermostats which maintain room temperature by controlling the operation of an HVAC (Heating, Ventilation and Air Conditioning) system. Separate heating and cooling set points and auto-changeover capability allow occupied and unoccupied programming schedules for energy savings.

All thermostats allow up to 3 occupied and one unoccupied time/temperature settings to be programmed per 24-hour peri- od. Each thermostat stores programs for 7 independent days. Batteries are not required. During power interruption the inter- nal NEVERLOST™ memory stores programmed schedules for an unlimited amount of time.

IMPORTANT: The thermostat has a configurable security level. If certain functions are not available (changing set points, changing programming sched- ules), the thermostat security level may be config- ured to exclude those functions. Call the installer to reconfigure the security level.

lower the desired set point, change the mode, program, 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 the AUTO or Program mode, pressing the UP ARROW or DOWN ARROW button will adjust both the heating and cooling set points. Pressing the UP ARROW or DOWN ARROW button 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.

→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 the program for that time period. 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 Occu- pied 1 icon will be displayed on the thermostat. The time of day and the minutes remaining in Override mode will alternate on the thermostat display.

The set points are adjustable with the UP ARROW and DOWN ARROW keys during Override mode.

CONFIGURATION

→Thermostat Display — The thermostat display is locat- ed in the center of the thermostat. See Fig. 1. The following in- formation can be displayed on the screen:

•mode (OFF, HEAT, COOL, AUTO, or PROGRAM ON)

•fan setting (FAN ON or blank for Fan Auto operation)

•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 — A Heat or Cool indicator is located in the middle 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.

Thermostat Front Panel Buttons — The thermo- stat has buttons on the front cover which are used to raise or

NOTE: If the thermostat is in Occupied mode and the Override button is pressed, the thermostat will go into Unoccupied mode immediately. The thermostat will remain in Unoccupied mode until the next Occupied start time.

Fig. 1 — Thermostat Display

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

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Catalog No. 533-353

Printed in U.S.A.

Form 33CS-13SO

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11-00

Replaces: New

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Carrier 33CS250-FS, 33CS220-FS owner manual General, Configuration
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33CS220-FS, 33CS250-FS specifications

The Carrier 33CS250-FS and 33CS220-FS are cutting-edge air conditioning models designed to deliver efficient cooling solutions for residential and commercial applications. Both models exemplify Carrier's commitment to innovation and sustainability, boasting a range of features and technologies that enhance comfort and energy efficiency.

One of the standout characteristics of these models is their high energy efficiency ratings. The Carrier 33CS250-FS and 33CS220-FS are equipped with advanced inverter technology, which allows them to adjust their cooling output according to the specific needs of the space. This not only ensures optimal comfort but also reduces energy consumption significantly, making them an environmentally friendly choice.

These units also feature a multi-stage filtration system designed to improve indoor air quality. The filtration system captures allergens, dust, and pollutants, ensuring that the air circulated within the living space is clean and healthy. This is particularly beneficial for individuals with allergies or respiratory conditions.

In terms of performance, the Carrier 33CS250-FS and 33CS220-FS models are designed to operate quietly, ensuring minimal disruption to daily activities. The use of sound-dampening technology minimizes operational noise, making these units ideal for bedrooms, living rooms, and office spaces.

Another notable technology included in these models is the intelligent self-diagnosis feature. This system monitors the unit's performance and alerts users to any issues that may arise, facilitating timely maintenance and reducing the likelihood of breakdowns. This proactive approach to maintenance not only extends the lifespan of the units but also enhances their overall reliability.

Additionally, both models are designed with ease of installation and servicing in mind. Their compact design allows for flexible placement, while the user-friendly interface streamlines operation and control.

In conclusion, the Carrier 33CS250-FS and 33CS220-FS air conditioning units offer a comprehensive suite of features and technologies aimed at improving energy efficiency, indoor air quality, and user experience. With their innovative designs and focus on sustainability, these models are a testament to Carrier's leadership in the HVAC industry, providing effective cooling solutions for a variety of settings.
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