Carrier AQUAZONE 50QE900-250FS - Manual

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: New Book 1 4
Tab 5a 5a
Owner’s Manual
Part Number 50QE900-250FS
CONTENTS
Page
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Thermostat Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Heat or Cool Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Thermostat Front Panel Buttons . . . . . . . . . . . . . . . . . 1
Keypad Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Set Clock. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Program Thermostat Schedules. . . . . . . . . . . . . . . . . . 2
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Auto-Changeover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Two-Stage Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Clock Backup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Fan Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Emergency Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Holiday Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Dry Contact Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Remote Temperature Sensor . . . . . . . . . . . . . . . . . . . . . 4
GENERAL
Carrier’s Aquazone 7-day, commercial, programmable ther-
mostats are flat, wall-mounted, low-voltage thermostats which
maintain room temperature by controlling the operation of an
HVAC (heating, cooling and ventilation) 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 time.
CONFIGURATION
Thermostat Display — The thermostat display is locat-
ed in the center of the thermostat. See Fig. 1. The following
information 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 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 thermostat
has buttons on the front cover which are used to raise or 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 AUTO mode, pressing
the UP ARROW or DOWN ARROW buttons will adjust both
the heating and cooling set points. Pressing the UP ARROW or
DOWN ARROW buttons in Cooling mode will adjust only the
IMPORTANT: Read entire instructions before program-
ming the thermostat.
IMPORTANT: The thermostat has a configurable secu-
rity level. If certain functions are not available (changing
set points, changing programming schedules), the ther-
mostat security level may be configured to exclude those
functions. Call the installer to reconfigure the security
level.
Fig. 1 — Thermostat Display
50QE900
Aquazone™ Water Source Heat Pump
Flush-Mounted Flatstat
Commercial Programmable Thermostat