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OWNER'S MANUAL
Programmable
Digital Thermostat
74
I2:00
Am
72
Mo
C
OOL
AUTO
70
H
EAT
Meets California Title 24
Designed for Commercial Water Source Heat Pumps
Commercial Systems & Services
P/N 50QE900-250FS
A Q U A Z O N E
Mounts Flush to the Wall
7 Day Programmable
3 Occupied, 1 Unoccupied
Auto Changeover
Large, Easy To Read Display
Thermoglow
Backlight
Remote Sensor Ready
Dry Contact Equipped
Energy Saving Smart Fan
Fan Purge, IAQ Feature
Includes Locking Cover
Carrier Corporation 3/00
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Table of Contents
Related Manuals for Carrier Aquazone 50QE900-250FS
Summary of Contents for Carrier Aquazone 50QE900-250FS
- Page 1 OWNER'S MANUAL P/N 50QE900-250FS A Q U A Z O N E Programmable Digital Thermostat Mounts Flush to the Wall 7 Day Programmable I2:00 3 Occupied, 1 Unoccupied Auto Changeover AUTO Large, Easy To Read Display Thermoglow Backlight Remote Sensor Ready...
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Page 2: Table Of Contents
Occupied / Unoccupied ADVANCED SETUP ABOUT ADVANCED OPERATION WARRANTY CAUTION Follow Installation Instructions before proceeding. SET THERMOSTAT TO MODE “OFF” PRIOR TO CHANGING SETTINGS IN SETUP OR RESTORING FACTORY DEFAULTS. Commercial Systems & Services Carrier Corporation 3/00 P/N 50QE900-250FS Page 1... -
Page 3: Front Panel
Front Panel Liquid Crystal Display with Thermoglow Up/Down Buttons Mode Button Override Button Heat or Cool Indicator Heat = Red, Cool = Green Temperature Sensor Bubble Page 2... -
Page 4: Display
Display I2:00 Start Stop SuMoTuWeThFrSa Setup unoccupied Locked Override AUTO ONOFF Program Fan On Service Filter Mode Indicators Selects the operation mode of the equipment. HEAT - indicates the heat mode. COOL - indicates the air conditioning mode. AUTO - indicates the system will automatically changeover between heat and cool modes as the temperature varies. - Page 5 Display Override Indication Indicates the current program is currently being overridden for up to 4 hours. Page 7,17. Occupied or Unoccupied Indication Indicates the program number: Occupied 1,2,3, or Unoccupied. Page 8-11. Setup Indication Indicates the thermostat is in the programming mode.
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Page 6: Quick Start Set The Clock And Go
Quick Start Set the Clock and Go Press the Mode button. During Setup & Programming: While holding the Mode, Pressing the Mode button MODE press the Override button selects different flashing items. for 2 seconds to enter Setup (Represented in dark black) OVERRIDE screens. -
Page 7: Basic Operation
Basic Operation I2:00 Select Mode The HEAT setting indicates the temperature the room has to reach before the furnace will Press turn on to heat the room. MODE I2:00 The COOL setting indicates the temperature the room has to reach before the air conditioner will turn on to cool the room. -
Page 8: Select Desired Temperature
Basic Operation Select Desired Temperature In any mode, adjust the I2:00 desired Set Temperature with AUTO buttons. Pressing the up/down buttons in Auto mode will adjust both the heat and cool set temperatures simultaneously. Pressing the up/down buttons in Heat or Cool modes will adjust only the heat or cool set temperature. -
Page 9: Programming
Programming Occupied & Unoccupied Periods Press the Mode button. While holding the Mode, press the Up button for 2 seconds to enter time period programming. MODE occupied Select the maximum # of occupied periods to be used on any one day. Typically 1. - Page 10 Programming Occupied & Unoccupied Periods unoccupied Adjust the heating set- point for unoccupied periods. (35 - 99) Press MODE occupied Select the day for Occupied 1. (M - S) Press MODE 7:00 Start occupied Adjust the start time for occupied 1. Press MODE 6:00...
- Page 11 Programming Occupied & Unoccupied Periods The copy command becomes available after the maximum # of occupied periods are programed in a day. This example uses 1 as the maximum occupied periods ever programed in one day. Select Yes or No to copy the previous day’s program to this day.
- Page 12 Programming Occupied & Unoccupied Periods Occupied Select Occupied 1 to run on this day (On), or not to run this day (Off). Press MODE Select Yes or No to copy the previous day’s program to this day. If No is selected: If Yes is selected: Selecting Yes, then pressing mode will copy the previous day’s program and then will ask the...
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Page 13: Advanced Setup
Advanced Setup Press the Mode button. MODE While holding the Mode, NOTE: Each step # is located at press the Override button the top right corner of the for 5 seconds to enter Setup display for easy reference. OVERRIDE screens. I2:00 Setup Adjust the time of day... - Page 14 Advanced Setup Fan On Setup Select fan operation, AUTO Fan On or Fan Auto. Press Fan Auto MODE Setup Adjust the deadband from 1 - 6 degrees. Press MODE Adjust the minimum Setup difference between cooling & heating setpoints. (0 - 6 ) Press MODE Select the cycles per...
- Page 15 Advanced Setup Setup Select the display back- light always On, or Off after 8 seconds. Press MODE Start Select the unit ID for Setup ‘Soft Start’. This is used in multiple installs to stagger equipment turn on times. 0 = off. Press Each # = 30 second delay.
- Page 16 Advanced Setup Setup Select the security level: 0=no security in effect Locked 1=setpoint range limited 2=1+ program on all times 3=2 + prohibits setpoint changes Press MODE Adjust the maximum Setup allowable heat setpoint Locked when security is in effect. (Step 15 only appears if step 14 is not 0).
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Page 17: Advanced Setup Table
Advanced Setup Setup Setup Select the reversing valve polarity for Heat Pump, O or B. Press MODE Press the Mode button. While holding the Mode, press the Override OVERRIDE button for 2 seconds to leave the Setup screens. If no buttons are pressed, the display will leave the setup screens after 30 seconds. -
Page 18: About Advanced Operation
About Advanced Features & 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. 2 STAGE OPERATION - The 2nd Stage of heat or cool is turned on when (1) the 1st Stage has been on for a minimum of two minutes, and (2) the temperature spread from the setpoint is equal to or greater than: the setpoint... - Page 19 About Advanced Features & Operation FAN PURGE TIMER - When this feature is activated, the fan will turn on during Unoccupied at a preset amount of time prior to Occupied 1. This preoccupancy fan purge timer may be set as instructed on page 13, step #9, from 0 - 3 hours.
- Page 20 About Advanced Features & Operation KEYPAD LOCK - To prevent unauthorized use of the thermostat, the front panel buttons may be disabled. To disable, or ‘lock’ the keypad, press and hold in the Mode button. While holding the Mode button in, press the Up and Down buttons in together.
- Page 21 About Advanced Features & Operation HOLIDAY MODE - This feature forces the thermostat into Unoccupied for a preset duration, up to 99 days. The Holiday setup display is entered as follows: Press the Mode button. While holding the Mode, press the Up button for 2 seconds to enter the time period programming setup.
- Page 22 About Advanced Features & Operation SOFT START - This feature is utilized in multiple thermostat installations controlled by the Dry Contact terminals. Assigning a unique Soft Start number to each thermostat will stagger the turn on times, even though the Dry Contact closes, for all the thermostats connected, at the same time.
- Page 23 About Advanced Features & Operation REMOTE SENSORS (Optional Accessory) - When connected to terminals RS+5, RS, & GND on the back of the thermostat, it will read the temperature from the Remote Sensor and ignore the temperature sensor inside the thermostat.
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Page 24: Warranty
Warranty One-Year Warranty - This Product is warranted to be free from defects in material and workmanship. If it appears within one year from the date of original installation, whether or not actual use begins on that date, that the product does not meet this warranty, a new or remanufactured part, at the manufacturer’s sole option, to replace any defective part will be provided without charge for the part itself;...