Carrier AQUAZONE 50QE900-250FS User manual

OWNER'S MANUAL
P/N 50QE900-250FS
Programmable
Digital Thermostat
Mounts Flush to the Wall
7 Day Programmable
3 Occupied, 1 Unoccupied
Auto Changeover
Large, Easy To Read Display
Thermoglow Backlight
Remote Sensor Ready
Dry Contact Equipped
Energy Saving Smart Fan
Fan Purge, IAQ Feature
Includes Locking Cover
Commercial Systems & Services Carrier Corporation 3/00
Meets California Title 24
Designed for Commercial Water Source Heat Pumps
72
74
70
Am
COOL
HEAT
AUTO
Mo
I2:00
AQUAZONE

Table Of Contents
FRONT PANEL
DISPLAY
QUICK START Set the clock and go
BASIC OPERATION
PROGRAMMING Occupied / Unoccupied
ADVANCED SETUP
ABOUT ADVANCED OPERATION
WARRANTY
Page 1
CAUTION
Follow Installation Instructions before proceeding.
SET THERMOSTAT TO MODE “OFF” PRIOR TO
CHANGING SETTINGS IN SETUP OR RESTORING
FACTORY DEFAULTS.
P/N 50QE900-250FS
2
3
5
6
8
12
17
23
Commercial Systems & Services Carrier Corporation 3/00

Front Panel
Page 2
Liquid Crystal Display
with Thermoglow
Up/Down Buttons
Mode Button
Override Button
Heat or Cool Indicator
Heat = Red, Cool = Green
Temperature Sensor Bubble
1
2
3
4
5
6
1
3
5
2
4
6

1
2
4
3
Mode Indicators
Selects the operation mode of the equipment.
HEAT - indicates the heat mode.
COOL - indicates the air conditioning mode.
AUTO - indicates the system will automatically
changeover between heat and cool modes
as the temperature varies.
OFF - indicates the entire system is turned off.
PROGRAM ON - indicates the stored program
is enabled to run. Page 6.
Clock with Day of the Week
Indicates the current time and day. This clock is
also used to program the timer periods. Page 5.
Room Temperature Display
Indicates the current room temperature.
Desired Set Temperature
Indicates desired room temperature(s). Page 7.
Display
Page 3
1
21
5
1
3
6
7
10
9
8
4
4
11
1
1
88
88
88
unoccupied
Program
Fan On Service Filter
On
Am
Pm
COOL
HEAT
Override
Locked
ONOFF
AUTO
Stop
Start
SetupSuMoTuWeThFrSa
123
I2:00

5
6
7
8
9
10
11
Override Indication
Indicates the current program is currently being
overridden for up to 4 hours. Page 7,17.
Occupied or Unoccupied Indication
Indicates the program number: Occupied 1,2,3,
or Unoccupied. Page 8-11.
Setup Indication
Indicates the thermostat is in the programming
mode. Page 12.
Fan Operation Indication
Fan On - indicates constant, continuous fan
operation.
When Fan On is not lit - indicates the fan will
only operate when necessary to heat or
to cool. Page 12.
Service Filter Indication
Service Filter indicates when the filter should
be serviced under normal conditions.
Appears after 0 - 1950 hours of blower
operation (adjustable). Page 14.
Locked Indication
Locked appears after the right combination of
buttons are pressed, rendering the buttons
inoperative. Page 19.
Start / Stop Indication
Start or Stop appears when programming
timer functions. Page 9.
Display
Page 4

During Setup & Programming:
Pressing the Mode button
selects different flashing items.
(Represented in dark black)
Pressing the Up and Down
buttons will modify the flashing
selection.
Press the Mode button.
While holding the Mode,
press the Override button
for 2 seconds to enter Setup
screens.
Press both Mode and
Override buttons as
above to return to
normal operation.
Quick Start Set the Clock and Go
Page 5
The thermostat is preprogrammed from the
factory to operate 1 or 2 Stage equipment* without
the need for further programming. To optimize the
installation of this thermostat follow the instructions
in the Advanced Setup section.
buttons.
To adjust the
clock or Day use
Press
I
I2:00
2
Su
OVERRIDE
OVERRIDE
MODE
MODE
MODE

The HEAT setting indicates the
temperature the room has to
reach before the furnace will
turn on to heat the room.
The COOL setting indicates the
temperature the room has to
reach before the air conditioner
will turn on to cool the room.
OFF indicates both heating
and air conditioning
systems are turned off.
AUTO will automatically select
heat or cool based on room
temperature demand.
Program On will activate the
stored timer operation.
(occupied &
unoccupied periods.)
Select Mode
Basic Operation
Page 6
Press
Press
Press
Press
70 69
Pm
HEAT
Mo
I2:00
70
72
Pm
COOL
Mo
I2:00
70
72
69
Pm
COOL
HEAT
AUTO
Mo
I2:00
70
73
70
unoccupied
ProgramOn
Pm
COOL
HEAT
Mo
1
I2:00
70
Pm
OFF
Mo
I2:00
MODE
MODE
MODE
MODE

buttons.
In any mode, adjust the
desired Set Temperature
with
Pressing the up/down buttons in Auto mode will adjust both the heat and cool
set temperatures simultaneously.
Pressing the up/down buttons in Heat or Cool modes will adjust only the
heat or cool set temperature.
Select Desired Temperature
Override
Page 7
Basic Operation
During programmed, unoccupied periods
a press of the Override button will force
the thermostat into Occupied 1 comfort
settings, temporarily.
With each successive push of the Override
button, the override timer will add 30
minutes, until the maximum of 4 hours is
reached. Then the next press will zero out
the override timer, returning to unoccupied
if there are no further button presses.
When in Override, the Override icon and
the Occupied 1 icon appear on the display.
The time of day clock alternates with the
time remaining in override.
During Override, the setpoints are
adjustable, provided the keypad is not
locked.
Press
OVERRIDE
70
72
69
Pm
COOL
HEAT
AUTO
Mo
I2:00
65
85
55
unoccupied
ProgramOn
Pm
COOL
HEAT
Stop
Su
I2:00
73
74
72
occupied
ProgramOn
Pm
Pm
COOL
HEAT
Override
Su
1
0:30
I2:00

Programming Occupied & Unoccupied Periods
Page 8
Press
Press
Press
Press
Press the Mode button. While holding the Mode,
press the Up button for 2 seconds to enter
time period programming.
Continued
Select the maximum # of
occupied periods to be
used on any one day.
Typically 1.
(1,2 or 3)
Adjust the cooling
setpoint for occupied 1.
Adjust the cooling
setpoint for unoccupied
periods.
Adjust the heating
setpoint for occupied 1.
(35 - 99 )
(35 - 99 )
(35 - 99 )
MODE
MODE
MODE
MODE
MODE
occupied 1
74
occupied COOL 1
74
72
occupied COOL
HEAT
1
85
unoccupied COOL

MODE
Programming Occupied & Unoccupied Periods
Page 9
Press
Press
Press
Press
Press
Continued
Adjust the heating set-
point for unoccupied
periods.
(35 - 99)
Select the day for
Occupied 1.
Adjust the stop time
for occupied 1.
Select Occupied 1 to run
on this day (On), or not to
run this day (Off).
Adjust the start time
for occupied 1.
(M - S)
Off
On
MODE
MODE
MODE
MODE
55
unoccupied
HEAT
occupied
Mo
1
occupied
Am Start
Mo
1
7:00
occupied
Pm Stop
Mo
1
6:00
occupied
ON
Mo
1