Carrier 50QE900-NPWS Aquazone Owner's Manual

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Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.PC 111 Catalog No. 535-00112 Printed in U.S.A. Form 50QE-5SO Pg 1 6-03 Replaces: NewBook 1 4Tab 5a 5aOwner’s ManualPart Number 50QE900-NPWSGENERALThe Aquazone commercial, non-programmable thermostatsare wall-mounted, low-voltage thermostats which maintainroom temperature by controlling the operation of an HVAC(heating, cooling and ventilation) system. Separate heating andcooling set points and auto-changeover capability allow ther-mostat flexibility.Batteries are not required. During power interruption theinternal NEVERLOST™ memory stores configuration settingsfor an unlimited time.CONFIGURATIONThermostat Display — The thermostat display is locat-ed in the center of the thermostat. See Fig. 1. The followinginformation can be displayed on the screen:• mode (OFF, HEAT, COOL, or AUTO)• fan setting (FAN ICON or blank)• room temperature• desired temperature• setup indicator• lock indicatorHeat or Cool Indicator — A Heat or Cool indicator islocated on the bottom middle cover of the thermostat. SeeFig. 2. The light will be red if the thermostat is in Heatingmode. The light will be green if the thermostat is in Coolingmode.Thermostat Front Panel Buttons — The thermo-stat has buttons on the front cover which are used to raise orlower the desired set point and change the current mode. SeeFig. 2.SET POINT BUTTONS — The UP ARROW and DOWNARROW buttons will raise or lower the current desired tem-perature set point. If the thermostat is in AUTO mode, pressingthe UP ARROW or DOWN ARROW button will adjust boththe heating and cooling set points. Pressing the UP ARROW orDOWN ARROW button in Cooling mode will adjust only thecooling set points. Pressing the UP ARROW or DOWNARROW button in Heating mode will adjust only the heatingset points.FAN BUTTON — The fan button determines fan operation.Pressing the fan button causes the fan setting icon ( ) to bedisplayed. When the fan setting icon is displayed, the fan willrun continuously. If the fan setting icon is not displayed, the fanwill run during heating and cooling operation only.KEYPAD LOCK — The thermostat has a keypad lockout fea-ture which will not acknowledge front panel buttons until thelockout sequence is entered. To disable or lock the keypad,press and hold the Mode button. While holding down the Modebutton, press the UP and DOWN ARROW buttons simulta-neously. The Locked icon ( ) will appear on the display.The thermostat is unlocked by performing the same proce-dure. Press and hold the Mode button. While holding down theMode button, press the UP and DOWN ARROW buttons si-multaneously. The Locked icon will be removed from the dis-play.MODE BUTTON OPERATION — The Mode button se-lects the operating mode of the thermostat. If OFF is selected,the thermostat will not enter Heating or Cooling mode. IfHEAT is selected, the thermostat will only enter Heating mode(if the room temperature is below the heating set point). IfCOOL is selected, the thermostat will only enter Cooling mode(if the room temperature is above the cooling set point). IfAUTO is selected, the thermostat will enter Heating or Coolingmode based on the room temperature and the heating and cool-ing set points.50QE900Aquazone™ Water Source Heat PumpCommercial Non-Programmable ThermostatCOOLINGSET POINTCOOLING MODEINDICATORAUTO MODEINDICATORHEATING MODEINDICATORHEATINGSET POINTSETUPINDICATORSYSTEMSTATUSROOMTEMPERATUREFANINDICATORLOCKEDINDICATORAUTOOFFON Setup°DISPLAYSCREENMODEBUTTON FANBUTTON INDICATORLIGHTDOWNARROWBUTTONUPARROWBUTTONAUTOOFFON Setup°Fig. 1 — Thermostat DisplayFig. 2 — Thermostat Front Cover

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