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PC 111 Catalog No. 535-00110 Printed in U.S.A. Form 50QE-3SO Pg 1 6-03 Replaces: New
Book 1 4
Ta b 5 a 5 a
Owner’s Manual
Part Number 50QE900-220LA
CONTENTS
Page
GENERAL
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
CONFIGURATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Thermostat Display
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Heat or Cool Indicator
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Thermostat Front Panel Buttons
. . . . . . . . . . . . . . . . . 1
Thermostat Programming Buttons
. . . . . . . . . . . . . . . 2
Set Clock
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Programming Thermostat Schedules
. . . . . . . . . . . . . 3
OPERATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4,5
Auto-Changeover
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Light-Activated Operation
. . . . . . . . . . . . . . . . . . . . . . . . 4
Two-Stage Operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Clock Backup
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Fan Operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Emergency Heat
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Holiday Mode
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
GENERAL
Carrier’s Aquazone 7-day, commercial, programmable ther-
mostats are 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 setting to be programmed per 24-hour period.
Each thermostat stores programs for 7 independent days.
Batteries are not required. During power interruption the inter-
nal NEVERLOST™ memory stores programs for an unlimited
time.
A light sensor is provided on the thermostat for light activa-
tion. When the sensor detects light (the space is occupied), the
thermostat will enter Occupied 1 mode. If the room is dark, the
thermostat will follow its programmed schedule.
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 on the bottom left cover 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 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
cooling set points. Pressing the UP ARROW or DOWN
ARROW buttons in Heating mode will adjust only the heating
set points. The UP ARROW and DOWN ARROW buttons are
also used in Programming mode.
IMPORTANT: Read entire instructions before program-
ming the thermostat.
IMPORTANT: The thermostat has a configurable security
level. If certain functions are not available (changing set
points, changing programming schedules), the thermostat
security level may be configured to exclude those func-
tions. Call the installer to reconfigure the security level.
50QE900
Aquazone™ Water Source Heat Pump
Commercial Light-Activated
Programmable Thermostat
Fig. 1 — Thermostat Display