Carrier AQUAZONE 50QE900-250FS 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. 535-00111 Printed in U.S.A. Form 50QE-4SO Pg 1 6-03 Replaces: NewBook 1 4Tab 5a 5aOwner’s ManualPart Number 50QE900-250FSCONTENTSPageGENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4Thermostat Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Heat or Cool Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Thermostat Front Panel Buttons . . . . . . . . . . . . . . . . . 1Keypad Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Set Clock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Program Thermostat Schedules. . . . . . . . . . . . . . . . . . 2OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Auto-Changeover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Two-Stage Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Clock Backup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Fan Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Emergency Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Holiday Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Dry Contact Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Remote Temperature Sensor . . . . . . . . . . . . . . . . . . . . . 4GENERALCarrier’s Aquazone 7-day, commercial, programmable ther-mostats are flat, wall-mounted, low-voltage thermostats whichmaintain room temperature by controlling the operation of anHVAC (heating, cooling and ventilation) system. Separateheating and cooling set points and auto-changeover capabilityallow occupied and unoccupied programming schedules forenergy savings.All thermostats allow up to 3 occupied and one unoccupiedtime/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 schedulesfor 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, AUTO, or PROGRAM ON)• fan setting (FAN ON or blank)• 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 Programming mode)Heat or Cool Indicator — A Heat or Cool indicator islocated in the middle of the thermostat. See Fig. 2. The lightwill be red if the thermostat is in Heating mode. The light willbe green if the thermostat is in Cooling mode.Thermostat Front Panel Buttons — The thermostathas buttons on the front cover which are used to raise or lowerthe desired set point, change the mode, program, and overridethe current program. See Fig. 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 buttons will adjust boththe heating and cooling set points. Pressing the UP ARROW orDOWN ARROW buttons in Cooling mode will adjust only theIMPORTANT: Read entire instructions before program-ming the thermostat.IMPORTANT: The thermostat has a configurable secu-rity level. If certain functions are not available (changingset points, changing programming schedules), the ther-mostat security level may be configured to exclude thosefunctions. Call the installer to reconfigure the securitylevel.Fig. 1 — Thermostat Display50QE900Aquazone™ Water Source Heat PumpFlush-Mounted FlatstatCommercial Programmable Thermostat