Carrier 50QE900-511WS User manual

OWNER'S MANUAL
P/N 50QE900-511WS
Programmable
Digital Thermostat
Dual Setpoint
5+1+1 Day Programmable
3 Occupied, 1 Unoccupied
Very Easy to Program
Large, Easy To Read Display
Thermoglow Backlight
No Batteries Required
Auto Changeover
Energy Saving Smart Fan
Locking Keypad
Override Button
Meets California Title 24
Designed for Commercial Water Source Heat Pumps
Commercial Systems & Services Carrier Corporation 3/00
Carrier
72
74
70
COOL
HEAT
AUTO
Mo
I2:00
Carrier
Includes Locking Cover
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 50QE900-511WS
2
3
5
6
8
13
17
22
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
1
2
3
4
5
2
3
45
1
72
74
70
COOL
HEAT
AUTO
Mo
I2:00
Carrier

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 8.
Clock with Day of the Week
Indicates the current time and day. This clock is
also used to program the timer periods. Page 13.
Room Temperature Display
Indicates the current room temperature.
Desired Set Temperature
Indicates desired room temperature(s). Page 7.
Display
Page 3
1
1
1
1
3
4
4
7
6
5
8
10
11
2

5
6
7
8
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 8-12.
Setup Indication
Indicates the thermostat is in the programming
mode. Page 13.
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 13.
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
MODE
Press
MODE
Press
MODE
Press
MODE
70
I2:00
69
Su
70
72
I2:00
Su
70
72
I2:00
69
Su
70
73
I2:00
70
Su occupied 1
70
I2:00
Su
OFF

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.
(MoTuWeThFr, Sa, Su)
Off
On
MODE
MODE
MODE
MODE
55
unoccupied
HEAT
Occupied
MoTuWeThFr
1
Occupied
Am Start
MoTuWeThFr
1
7:00
Occupied
Pm Stop
MoTuWeThFr
1
6:00
Occupied
ON
MoTuWeThFr
1

Programming Occupied & Unoccupied Periods
Page 10
Press
Press
Press
Press
Continued
Adjust the start time
for occupied 1.
Adjust the stop time
for occupied 1.
Select the day
for Occupied 1.
(Sa, Su, MoTuWeThFr)
MODE
MODE
MODE
MODE
Occupied
Sa
1
occupied
Am Start
Sa
1
9:00
occupied
Pm Stop
Sa
1
5:00
Select Occupied 1 to run
on this day (On), or not to
run this day (Off).
Off
On
occupied 1
Su
On

occupied
Su
1
Programming Occupied & Unoccupied Periods
Page 11
Adjust the start time
for occupied 1.
Adjust the stop time
for occupied 1.
Select the day
for Occupied 1.
Select Occupied 1 to run
on this day (On), or not to
run this day (Off).
Off
On
occupied
ON
Su
1
occupied
Pm Stop
Su
1
5:00
occupied
Am Start
Su
1
9:00
Press
Press
Press
MODE
MODE
MODE
Press the Mode button. While holding the Mode,
press the Up button for 2 seconds to exit
time period programming.
MODE
To Exit Programming

PROGRAMMING NOTES
If only 1 Occupied period is selected in step 1 on page 8, Occupied 2 & 3
programming steps are
Further, if only 2 occupieds are selected, Occupied 3 programming
steps are skipped.
skipped.
Heat & Cool setpoints for Occupied 1 are the same for every day of the week.
Heat & Cool setpoints
each day of the week, if desired.
for Occupied 2 & 3 can be adjusted differently for
If the start time is set later in the day than the stop time,
the program will run from the start time to
the stop time on the same day. For example: 9:00pm start, 8:00am stop,
on MTWTF. In this example the program will run from 12:00am MTWTF to
8:00am MTWTF and again
midnight and from midnight to
from 9:00pm MTWTF to 12:00pm MTWTF.
The Unoccupied settings take effect at all times when:
(1) the program is on and (2) the current time is outside a preset occupied
period.
If the same start and stop times are programmed in for an occupied period,
then it will run 24 hours.
If one occupied period starts and stops within another occupied period,
the lower occupied # has
For example: If Occupied 3 is programmed to be “on” 24 hours,
and Occupied 2 is
settings will take over from occupied 3 between
priority.
programmed to run that day, then Occupied 2
Occupied 2 start and
stop times.
For this reason start and stop times aren’t necessary for unoccupied.
Programming Occupied & Unoccupied Periods
Page 12

Advanced Setup
Page 13
Press
Press
Press
Press
Continued
Adjust the time of day
clock.
Select Display operation,
Full Display (On), or
Minimal display (Off).
Select fan operation,
Fan On, or Fan Auto.
Select the day of the
week.
Press the Mode button.
While holding the Mode,
press the Override button
for 5 seconds to enter Setup
screens.
NOTE: Each step # is located at
the top right corner of the
display for easy reference.
Display On
Display Off
Fan On
Fan Off
Tip: To change hours quickly, press and
hold the override button in and press
the up or down buttons.
OVERRIDE
MODE
MODE
MODE
MODE
MODE
I
Am
Setup
I2:00
2
SetupMo
dsp
3
ON
Setup
4
Fan
AUTO
Setup

Advanced Setup
Page 14
Press
Press
Press
Press
Continued
Adjust the minimum
difference between
cooling & heating
setpoints.
Adjust the deadband
from 1 - 6 degrees.
(0 - 6 )
81f
MODE
MODE
MODE
MODE
2
5
Setup
88
2
6
COOL
HEAT
Setup
Select the display back-
light always On, or Off
after 8 seconds.
On
Off
Select the cycles per
hour limit.
d=cycles per hour
limit defeated.
d1=d + defeat 5 min.
Compressor lockout.
(d, d1, 2 - 6)
6
7
Cy
Setup
Setup
L I
8
ON

Advanced Setup
Page 15
Select thermostat
operation in degrees
Fahrenheit or Centigrade.
C
F
Press the Mode button.
While holding the Mode, press the Override
button for 2 seconds to leave the Setup
screens. If no buttons are pressed, the
display will leave the setup screens after
30 seconds.
Press
MODE
Setup
F
9
OVERRIDE
MODE
Select the reversing
valve polarity for
Heat Pump, O or B.
B
O
0
I0
Setup

Advanced Setup
Page 16
Step # Description Range Factory Default
1 Time of day clock set 24 hour 12:00 Am
2 Day of the week Sun - Sat Monday
3 Display Blanking Off / On On
4 Fan operation Auto / On Auto
5
6
7
8
9
10
Deadband or Temperature swing 1 - 6 2
Forced minimum difference heat/cool 0 - 6 2
Cycles per hour d, d1, 2 - 6 6
Thermoglow backlight Off / On On
Fahrenheit or Centigrade F / C F
Reversing Valve polarity O / B O
Advanced Setup Table

About Advanced Features & Operation
Page 17
CLOCK BACKUP - In the event of a power loss, the thermostat
internal clock will continue to keep proper time for a
minimum of 48 hours without external power or batteries.
2 STAGE OPERATION - The 2nd Stage of heat or cool is
turned on when (1) the 1st Stage has been on for a
minimum of two minutes, and (2) the temperature spread
from the setpoint is equal to or greater than: the setpoint
plus the deadband, plus 2 degrees.
Heat
Setpoint
Cool
Setpoint
Dead
Band
Dead
Band
2 degrees 2 degrees
1st Stage
turn on
2nd Stage
turn on
1st Stage
turn on
2nd Stage
turn on
Heating Cooling
MINIMUM HEAT/COOL SETPOINT DIFFERENCE - The Heat
and Cool setpoints will not be allowed to come any closer
to each other than the value set in Advanced Setup step
# 6, on page 14. This minimum difference is enforced
during Auto changeover operation.
and Program On
ENERGY SAVING SMART FAN - If Fan On is selected,
page 13, step 4, the fan will run continuously at all times,
except in Off, and will only run if there is a heating or
cooling demand in Unoccupied periods.
OVERRIDE - As explained on page 7, pressing the Override
button during a programmed, Unoccupied period will force
the thermostat into Occupied 1, temporarily, up to 4 hours.
If the Override button is pressed during an Occupied
period, the thermostat will be forced into Unoccupied and
occupied # (1,2 or 3), it was forced out of will be
off, only for that day.
During Override periods the setpoints may be adjusted,
but they will not be remembered after Override ends.
the
turned

About Advanced Features & Operation
Page 18
EMERGENCY HEAT -
Override button. While holding the Override button press
the Up button for 2 seconds. The Cool setpoint display
will read ‘EH’.
During Emergency Heat the thermostat will turn
on the fan and the 2nd stage of heat, when there is a
demand for heat, locking out the 1st stage compressor.
Exiting Emergency Heat is the same as entering. During
Emergency Heat only OFF and HEAT are available.
To turn on Emergency Heat press in the
Press for
Emergency Heat
OVERRIDE
73
eh
I2:00
74
Su

About Advanced Features & Operation
Page 19
KEYPAD LOCK - To prevent unauthorized use of the thermostat,
the front panel buttons may be disabled. To disable, or
‘lock’ the keypad, press and hold in the Mode button.
While holding the Mode button in, press the Up and Down
buttons in together. The Locked icon will appear on the
display.
DISPLAY BLANKING
Press all 3 for
Keypad Lockout
To unlock the buttons, again press and hold the Mode
button. While holding the Mode button in, press the Up
and Down buttons in together. The Locked icon will
disappear from the display.
The thermostat display may be configured in advanced
setup, page 13, step 3, to always be visible as normally
expected, or may be selected Off. When selected Off,
only the time of day will appear until a button is pressed.
When a button is pressed the full, normal display will
appear then revert to the time of day only, after roughly
10 seconds.
MODE
Locked
70
85
55
unoccupied
ProgramOn
Am
COOL
HEAT
Su
I2:00