Carrier 50QE900-511WS- User 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. 535-00109

Printed in U.S.A.

Form 50QE-2SO

Pg 1

6-03

Replaces: New

Book 1

4

Tab

5a 5a

Owner’s Manual

Par t Number 50QE900-511WS

GENERAL

The Aquazone commercial, programmable thermostats 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-hr period.
Each thermostat stores programs for 3 daily schedules
(Saturday, Sunday, and Monday through Friday). Batteries are
not required. During power interruption the internal
NEVERLOST™ memory stores programs 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
• 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 middle 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 thermo-

stat 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 button will adjust both
the heating and cooling set points. Pressing the UP ARROW or
DOWN ARROW button in Cooling mode will adjust only the
cooling set points. Pressing the UP ARROW or DOWN
ARROW button in Heating mode will adjust only the heating

set points. The UP ARROW and DOWN ARROW buttons are
also used in Programming mode.
OVERRIDE BUTTON — The Override button is used to
force the thermostat from Unoccupied mode into the Occupied
1 mode comfort settings. The Override period will be set at
30 minutes. The thermostat will then return to Unoccupied
mode. To increase the amount of time in Override mode, press
the Override button again. Thirty minutes of override time will
be added for each time the Override button is pressed up to a
maximum of 4 hours. After the 4-hour limit has been reached,
press the Override button again to cancel Override mode.

While in Override mode, the Override icon and the Occu-

pied 1 icon will be displayed on the thermostat. The time of
day and the minutes remaining in Override mode will alternate
on the thermostat display.

IMPORTANT: Read entire instructions before program-
ming the thermostat.

50QE900

Aquazone™ Water Source Heat Pump

Commercial 5-1-1 Day Programmable Thermostat

Am

COOL

HEAT

AUTO

DISPLAY
SCREEN

MODE
BUTTON

OVERRIDE
BUTTON

INDICATOR
LIGHT

DOWN
ARROW
BUTTON

UP
ARROW
BUTTON

Mo

Fig. 1 — Thermostat Display

Fig. 2 — Thermostat Front Cover