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Carrier 33CS420-01 - User Manual

Carrier 33CS420-01
89 pages
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7-DAY
7-DAY
PROGRAMMABLE
PROGRAMMABLE
DIGITAL
DIGITAL
THERMOSTAT
THERMOSTAT
HEAT
PUMP
Accepts EZ Programmer
Accepts Optional Humidity Module:
Controls Humidification,
Dehumidification and Reheat
Accepts Optional IR Remote Control
3 Configurable Outputs
Control up to 3 Heat &
2 Cool Stages
Adjustable 2nd & 3rd Stage
Timers & Deadbands
Backlit Display & Button
Legends
Aux Heat Indicator
Set Point Limiting
Outdoor Sensor Ready with
High/Low Readouts for the Day
3 Configurable Outputs
Control up to 3 Heat &
2 Cool Stages
Carrier Corporation 04/06
Use with most Air Conditioning & Heating Systems including: 1 or 2 Stage
Electric Cooling & 3 Stage Gas Heating, Heat Pump, Electric or Hydronic Heat.
OWNER’S
MANUAL
OWNER’S
MANUAL
OPTIONAL
HUMIDITY MODULE
OPTIONAL
HUMIDITY MODULE
Accepts the
Accepts the
COMMERCIALCOMMERCIAL
THERMOSTATTHERMOSTAT
P/N P/N
33CS420-0133CS420-01
AUTO
I2:00
Su
Pm
HEAT
COOL
72
74
HEAT
COOL
&

Table of Contents

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Carrier 33CS420-01 Specifications

General IconGeneral
Stages1 Heat/1 Cool
Power Source24V AC
Temperature Range45°F to 90°F
Fan ControlAuto / On
ColorWhite
Programmability7-Day
CompatibilityConventional and Heat Pump Systems
DisplayLCD
System SwitchHeat/Cool/Off
MountingWall

Summary

Section 1 Quick Start

Setting the Clock and Day

Configures the thermostat's current time and day settings for accurate operation.

Selecting the Heat or Cool Mode

Guides users on choosing between heating, cooling, or automatic system modes.

Selecting Your Desired Temperature

Explains how to adjust the target temperature for heating and cooling.

Using the Fan Button

Details the function of the fan button for manual control and automatic fan operation.

Section 2 Getting to Know Your Thermostat

Front Panel Overview

Identifies and describes the function of all buttons and indicators on the thermostat's front panel.

Display Features Explained

Provides a breakdown of the information displayed on the thermostat's LCD screen.

Section 3 Setting the Clock and Day

Setting the Clock

Step-by-step guide to setting the current time on the thermostat's digital display.

Setting the Day

Instructions for selecting the current day of the week for accurate scheduling.

Section 4 Basic Operation

Programmable Operation Modes

Explains configuration options for programmable vs. non-programmable thermostat behavior.

Selecting System Mode

Details how to select between Heat Only, Cool Only, Auto, or Program On modes.

Adjusting Temperature Setpoints

Guides on setting desired heating and cooling temperatures.

Section 5 Viewing Temperature and Humidity

Viewing Outside Temperature

Instructions on how to read the current and historical outdoor temperatures.

Viewing Indoor Humidity

Explains how to view the current indoor humidity levels.

Section 6 Daily Schedule Programming

Programming a Daily Schedule

Step-by-step guide for setting up daily heating and cooling schedules.

Overriding the Daily Schedule

Describes how to temporarily change programmed settings using the override function.

Section 7 Fan Operation Programming

Using the Fan Button and Smart Fan

Details fan control options including manual 'Fan On' and automatic 'Smart Fan' features.

Setting the Fan-Off Time Delay

Explains how to configure a delay for the fan after a cooling cycle ends.

Section 8 Thermostat Display Options

Backlight Control

Instructions for turning the thermostat's LCD backlight on, off, or setting it to auto.

Temperature Units (Fahrenheit;Celsius)

Guides on selecting the preferred unit for displaying temperature readings.

Keypad Locking

Procedure to disable or enable the thermostat's front panel buttons to prevent unauthorized access.

Programming Security Levels

Details setting security levels to restrict access to certain thermostat functions.

Section 9 Humidification

Installing the Humidity Module

Steps for physically installing the optional humidity control module.

Humidity Operation Jumpers and Setpoints

Covers jumper settings and adjusting the humidification setpoint for optimal performance.

Section 10 Dehumidification

Dehumidification Jumper Configuration

Instructions for setting jumpers to enable dehumidification control via MISC terminals.

Dehumidification Setpoint Adjustment

Guide to setting the desired humidity level for dehumidification operation.

Using Air Conditioner for Dehumidification

Explains how to utilize the AC for dehumidification and DEHUM terminal functions.

Section 11 Equipment Run-Time Viewing

Viewing Override and Humidifier Run-Times

Displays how to check the accumulated run-time for override and humidifier functions.

Viewing UV Light Run-Time

Instructions for viewing the operational run-time of the UV light feature.

Section 12 Heat Pump and Electric Heat

Heat Pump and Reversing Valve Jumper Settings

Explains jumper settings related to heat pump operation and reversing valve control.

Electric Heat Jumper Setting

Details the jumper configuration for electric heat operation and fan control.

Using Emergency Heat

Guide on how to activate and use the emergency heat mode for the heat pump system.

Section 13 Timers and Deadbands

Adjusting Heat;Cool Differential and Cycles

Covers setting the minimum temperature difference and cycles per hour limits.

Adjusting Deadbands

Instructions for configuring deadband settings for multi-stage heating and cooling.

Run-Time Delays Between Stages

Explains setting minimum on-time requirements for stage activation.

Selecting 2 nd Stage Turn Off Temperature

Guides on determining when the second stage of heating or cooling should turn off.

Section 14 Energy Save Operation

How to Use the Energy Save Feature

Explains the 'Smart Recovery' feature for optimizing comfort and energy efficiency.

Section 15 Run-Time Alert Programming

Setting Service Filter (Fan Run-Time) Alert

Guides on configuring and resetting alerts for fan run-time maintenance.

Setting UV Light Run-Time Alert

Instructions for setting and resetting alerts based on UV light operational hours.

Setting Humidify Run-Time Alert

Details configuring and resetting alerts for humidifier operational days.

Section 16 Holiday Mode Programming

Programming and Overriding Holiday Mode

Covers setting up and temporarily overriding the thermostat's holiday schedule.

Section 17 MISC Outputs Configuration

Configuring MISC Jumpers

Explains how to set jumpers for MISC1, MISC2, and MISC3 for flexible output control.

Explanation of Jumper Settings

Provides details on the functions controlled by various MISC jumper configurations.

Section 18 Factory Defaults, Calibration, and Sensors

Resetting to Factory Default Settings

Guides on restoring the thermostat to its original factory settings.

Calibrating Temperature and Humidity Sensors

Instructions for adjusting temperature and humidity sensor readings if calibration is needed.

Section 19 Accessories

Accessory Port

Details the RJ11 jack for connecting external communication or programming devices.

IR Receiver; Remote Control

Information on using an IR receiver for wireless thermostat control.

EZ Programmer

Description of the EZ Programmer for storing and uploading thermostat programming data.

Section 22 Warranty

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