Carrier 50QE900-511WS Operating instructions

50QE900
Aquazone™ Water Source Heat Pump
Commercial Programmable Thermostat
Installation and Operating Instructions
Part Number 50QE900-511WS
IMPORTANT: Read entire instructions before starting
the installation.
SAFETY CONSIDERATIONS
Read and follow manufacturer instructions carefully. Follow all local electrical codes during installation. All wiring
must conform to local and national electrical codes. Improper
wiring or installation may damage thermostat.
Recognize safety information. This is the safety alert symbol . When the safety alert symbol is present on equipment
or in the instruction manual, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING, and
CAUTION. These words are used with the safety alert symbol.
DANGER identifies the most serious hazards which will result
in severe personal injury or death. WARNING signifies a hazard which could result in personal injury or death. CAUTION
is used to identify unsafe practices which would result in minor
personal injury or property damage.
GENERAL
The 50QE900-511WS commercial, programmable thermostat is a wall-mounted, low-voltage thermostat which
maintains 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 for energy
savings.
This thermostat allows up to 4 time/temperature settings to
be programmed per 24-hour period. Each thermostat stores
programs for 3 different days (Saturday, Sunday, and Monday
through Friday). Batteries are not required. During power interruption the internal NEVERLOST™ memory stores programmed schedules for an unlimited time while the clock
continues to run for at least 48 hours.
The thermostat can be configured to accept several different
equipment configurations, and is provided for heat pump
operation.
The thermostat should NOT be mounted:
• close to a window, on an outside wall, or next to a door
leading to the outside
• where exposed to direct light and heat from a lamp, the
sun, a fireplace, or any other temperature-radiating
object which may cause a false reading
• close to or in direct airflow from supply registers or
return-air grilles
• in areas with poor air circulation (such as behind a door
or in an alcove)
Install Thermostat
Before installing thermostat, turn off all power to the unit.
There may be more than one power disconnect. Electrical
shock can cause injury or death.
1. Turn off all power to unit.
2. If an existing thermostat is being replaced:
a. Remove existing thermostat from the wall.
b. Disconnect wires from existing thermostat. Do not
allow wires to fall back into the wall. As each wire
is disconnected, record wire color and terminal
connection.
c. Discard or recycle old thermostat.
NOTE: Mercury is a hazardous waste and must be
disposed of properly.
3. Remove the thermostat cover from wall plate (mounting
base) to expose mounting holes. See Fig. 1.
1"
3 1/8"
MOUNTING
HOLE
B
O
WIRING
TERMINAL
BLOCK
R G Y1 W2 W1 Y2 C
INSTALLATION
Select Thermostat Location — The thermostat should
be mounted:
• approximately 5 ft from the floor
• close to or in a frequently used room, preferably on an
inside partitioning wall
• on a section of wall without pipes or ductwork
• where temperature operating limits are within 41 to
104 F (5 to 40 C)
• where humidity operating range is within 0 to 95% relative humidity, non-condensing
3 1/8"
HOLE FOR
WIRING
MOUNTING
HOLE
Fig. 1 — Thermostat Mounting and Wiring
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 111
Catalog No. 535-00104
Printed in U.S.A.
Form 50QE-3SI
Pg 1
6-03
Replaces: New
Book 1
4
Tab 5a 5a
4. Route thermostat wires through large hole in mounting
base. Remove outer sheath from wires for added flexibility. Standard solid or multi-conductor thermostat wire
should be used from the thermostat to the unit. Size and
length considerations are as follows: for a maximum
distance from unit of 36 ft, use 22 AWG (American
Wire Gage) wire; for a maximum distance from unit
of 100 ft, use 18 AWG wire.
5. Level mounting base against wall and mark wall through
the 2 mounting holes in base.
6. Drill two 3/16-in. mounting holes in wall where marked.
B
O
W2 Y2 R W1 Y1 G
C
Thermostat
COMPLETE C
24 vac common
C
Fan
Compressor
G
Cooling
O
Y
W
24 vac return
R
Fig. 2 — Water Source Heat Pumps Equipped
with 1 Complete C Control Board
for Single Stage Operation
Be careful not to drill into wiring in wall. Electrical shock
could result.
7. Secure mounting base to wall with 2 screws and anchors
provided. Ensure all wires exit through hole in mounting
base.
8. Adjust wire length and routing to allow proper closure of
the thermostat. Strip each wire at the end no more than
1/ -in. to prevent adjacent wires from shorting together.
4
Match and connect wires to terminals on the thermostat.
See Fig. 2-4 and Table 1.
B
O
W2 Y2 R W1 Y1 G
C
Thermostat
COMPLETE C1 COMPLETE C2
Improper wiring or installation may cause damage to the
thermostat. Check to ensure wiring is correct before proceeding with installation of unit.
24 vac common
C
C
Fan
Compressor
G
G
Y
Y
Cooling
O
O
W
W
R
R
24 vac return
Compressor 2
Fig. 3 — Water Source Heat Pumps Equipped
with 2 Complete C Control Boards
for Two-Stage Operation
9. Push excess wiring into wall. Seal hole in wall to prevent
drafts.
10. Re-attach thermostat cover to back plate.
11. Turn on power to unit. The thermostat will receive power
from the unit. The thermostat will be powered by 24 v,
nominal (18 to 30 vac). Terminals R (+ 24 v), W1/O/B
(first stage heat or reversing valve), Y1 (first stage cooling), G (fan relay) and C (common) will always be connected. Some applications will use Y2 (second stage
cooling) or W2 (second stage heating).
B
O
W2 Y2 R W1 Y1 G
C
Thermostat
DELUXE D
24 vac common
C
Fan
Compressor 1
G
Set Clock — The Mode and Override buttons are used to
change the time and day displayed on the thermostat. Press and
hold the Mode and Override buttons for 2 seconds to enter the
setup screens. The current time will blink on and off. Press the
UP ARROW and DOWN ARROW buttons until the correct
time is shown. Hold down the buttons to quickly move through
the time display. The AM and PM annunciators will automatically change. Hold down the Override button while pressing
UP ARROW or DOWN ARROW to change the time by hours
instead of minutes. To ensure the schedules are properly
followed, make sure that AM or PM is correct for the time chosen. When the correct time is shown, press the Mode button to
modify the day of the week. The current day will blink on and
off. Press the UP ARROW and DOWN ARROW buttons until
the correct day is shown. Press the Mode and Override buttons
again to exit the Set Clock mode.
Cooling
Y1
O/W2
W1
24 vac return
Compressor 2
R
Y2
Fig. 4 — Water Source Heat Pumps Equipped
with Deluxe D Control Board(s)
for Single or Two-Stage Operation
Table 1 — Thermostat Wiring Terminations
EXISTING WIRE
DESIGNATION
G or F
Y1, Y, or C
W1, W, or H
Rh, R, M, Vr, or A
C
O/B
Y2
W2
Heat Pump Configuration — To configure the thermostat for heat pump operation, Advanced Setup Steps 5 (Heat
Pump Operation) and 6 (Reversing Valve Polarity) must be
configured correctly. See the Configure Advanced Setup section for information on configuring these options.
FUNCTION
Fan
Cooling
Heating
Power (24 v)
Common
Reversing Valve†
Second Stage Cooling
Second Stage Heating
TERMINAL
CONNECTION
G
Y1
W1/O/B
R
C
W1/O/B
Y2*
W2*
*Terminals Y2 and W2 may not be used in all applications.
†Used on Heat Pump applications only.
2
Configure Advanced Setup — To enter the advanced setup screens of the thermostat, press the Mode and
Override buttons at the same time for 5 seconds. The Advanced Setup Step number is shown in the top right corner of
the thermostat screen. Use the Mode button to advance through
the steps. See Table 2. Press the Mode and Override buttons at
the same time to exit the Advanced Setup mode.
NOTE: Refer to Set Clock section on page 2 for an explanation
of Advanced Setup Steps 1 and 2.
variable can also be set from 2 to 6 cycles per hour. The default
is 6 cycles per hour.
Damage to compressor could result if 5-minute compressor
lockout is disabled or compressor is allowed unlimited
cycles. Do not set thermostat Advanced Setup Step 9 to
‘‘d’’ or ‘‘d1’’ unless specifically recommended for the
application.
Table 2 — Advanced Setup Configuration
STEP
1*
2*
3
4
5
6
7
8
9
10
11
DESCRIPTION
Time of Day
RANGE
12:00 AM - 11:59 PM
Sunday through
Day of the Week
Saturday
Display Blanking
Off/On
Fan Mode
On/Auto
Heat Pump
Off/On
Reversing Valve Polarity
O/B
Deadband
1 - 6 degrees
Forced Minimum
0 - 6 degrees
Temperature Difference
Cycles Per Hour
d, d1, 2 - 6
Thermoglow™
Off/On
Backlight
Temperature Units
F/C
BACKLIGHT DISPLAY (Step 10) — The display backlight
can be set to ON (always on) or OFF (turn off 8 seconds after
usage). The default is ON.
FAHRENHEIT/CELSIUS OPERATION (Step 11) — The
thermostat can be set to operate in Fahrenheit or Celsius
degrees. Set the variable to ‘‘F’’ for Fahrenheit operation. Set
the variable to ‘‘C’’ for Celsius operation. The default is ‘‘F.’’
DEFAULT
12:00 AM
Monday
Off
Auto
On
O
2
Program Thermostat Schedules — Before programming the thermostat, plan the thermostat daily schedule.
The schedule is divided into 3 different day schedules: Monday
through Friday, Saturday, and Sunday. The schedules for Monday, Tuesday, Wednesday, Thursday, and Friday are the same.
Each day has from 2 to 4 time periods (Occupied 1, Occupied
2, Occupied 3, Unoccupied) depending on the configuration of
the thermostat. Each occupied time period has a start time, stop
time, heating set point, and cooling set point. The unoccupied
time period has a heating set point and a cooling set point. The
unoccupied time period is active when ever an occupied time
period is not active. Fill in Table 3 as an aid to programming
the daily schedules.
NOTE: The Occupied 1 and Unoccupied time period temperature set points are the same for each day.
PROGRAMMING MODE — To program the daily schedules, perform the following procedure:
1. Enter programming mode by pressing the and holding the
Mode and UP ARROW buttons. The Occupied 1 annunciator will appear on the thermostat display. Use the UP
ARROW and DOWN ARROW buttons to set the maximum number of Occupied periods for each day. The thermostat can be set to 1, 2, or 3. After the number of Occupied periods has been selected, press the Mode button.
See Fig. 5.
2. The cooling set point for Occupied 1 will be displayed.
Use the UP ARROW and DOWN ARROW buttons to
raise or lower the cooling set point until the desired temperature is shown. The range of acceptable values is 35 to
99 F (1 to 37 C). Press the Mode button to continue. See
Fig. 5.
3. The heating set point for Occupied 1 will be displayed.
Use the UP ARROW and DOWN ARROW buttons to
raise or lower the heating set point until the desired temperature is shown. The range of acceptable values is 35 to
99 F (1 to 37 C). Press the Mode button to continue. See
Fig. 5.
2
6
On
F
*Accessed and configured through the Set Clock Setup function.
DISPLAY BLANKING (Step 3) — When Display Blanking
is set to OFF, the thermostat will display the time of day, current temperature, and mode normally. When Display Blanking
is set to ON, the thermostat will only display time of day. The
default is OFF.
FAN MODE (Step 4) — The fan mode is used to configure
fan operation. If On is selected, the fan will run continuously
during the Occupied schedule (except when Mode is switched
to OFF). The fan will be off during unoccupied schedule except during heating or cooling operation.
If Auto is selected, the fan will operate only during heating
or cooling operation. The default is Auto.
HEAT PUMP CONFIGURATION (Steps 5 and 6) — The
thermostat is provided from the factory in heat pump mode. To
set the thermostat for heat pump operation, Advanced Setup
Step 5 must be configured to ON. Use the UP and DOWN
ARROW buttons to configure the step. The default is ON.
Press the Mode button to continue to Step 6. Step 6 is used to
set the reversing valve polarity for the heat pump. The variable
can be set to either ‘‘B’’ or ‘‘O.’’ Set the reversing valve polarity to the correct value depending on the application. The default is ‘‘O.’’
NOTE: Step 6 will appear only if Step 5 is set to ON.
DEADBAND (Step 7) — The deadband is the difference in
temperature above the cooling set point or below the heating
set point that the thermostat will wait before turning on the first
stage of heating or cooling. For example, if the cooling set
point is 82 F (28 C) and the deadband is 2 degrees, the first
stage of cooling will not be energized until the temperature
reaches 84 F (30 C). The range of values is 1 to 6 degrees. The
default is 2 degrees.
SET POINT MINIMUM DIFFERENCE (Step 8) — The minimum difference between heating and cooling set points can be
user-configured. The range is from 0 to 6 degrees. The default
is 2 degrees. The minimum difference is enforced during Autochangeover and Program On operation.
CYCLES PER HOUR LIMIT (Step 9) — The number of
times that heating or cooling can be energized per hour can be
configured. Set the variable to ‘‘d’’ for no limit. Set the variable
to ‘‘d1’’ to disable the 5-minute compressor lockout. The
Fig. 5 — Setting Occupied 1 Set Points
3
12. The program will continue to cycle through the 3 schedules (Sa, Su, Mo-Fr) and repeating Steps 7 to 10. Press
the Mode and UP ARROW buttons at the same time to
exit Programming mode.
NOTE: The thermostat will continue to follow the schedule
until a new one is entered.
If only one occupied schedule is selected, the Occupied 2
and 3 schedules are skipped. If the start time is set later in the
day than the stop time, the program will run from midnight of
that day to the stop time and then from the start time to midnight. If the same start and stop times are programmed for an
occupancy schedule, the thermostat will be in Occupied mode
for 24 hours. If one occupied period starts or stops within another occupied period, the lower numbered schedule has priority. For example, if schedule Occupied 3 is running for 24 hours
and Occupied 2 schedule comes on from 1 to 3 PM, the set
points from Occupied 2 are in effect from 1 to 3 PM.
OVERRIDING THE SCHEDULE — The schedule can be
overridden by pressing the UP or DOWN ARROW buttons to
change the desired temperature. The thermostat will use the
new set point until the next scheduled time period starts.
4. The cooling set point for Unoccupied will be displayed.
Use the UP ARROW and DOWN ARROW buttons to
raise or lower the cooling set point until the desired temperature is shown. The range of acceptable values is 35 to
99 F (1 to 37 C) or ‘‘OF’’ (no unoccupied cooling). To
configure to ‘‘OF,’’ press UP ARROW after reaching 99.
Press the Mode button to continue.
5. The heating set point for Unoccupied will be displayed.
Use the UP ARROW and DOWN ARROW buttons to
raise or lower the heating set point until the desired temperature is shown. The range of acceptable values is 35 to
99 F (1 to 37 C) or ‘‘OF’’ (no unoccupied heating). To
configure to ‘‘OF,’’ press DOWN ARROW after reaching 35. Press the Mode button to continue.
6. The day of the week will be shown. Use the UP ARROW
and DOWN ARROW buttons to change the day of the
week until the desired starting day is shown. Possible
choices are Mo-Fr (Monday through Friday), Sa (Saturday), and Su (Sunday). Press the Mode button when the
desired day is shown.
7. The Start Time for Occupied 1 for the chosen day will be
displayed. Use the UP ARROW and DOWN ARROW
buttons to raise or lower the time until the desired Start
Time is shown. Press the Mode button to continue. See
Fig. 6.
8. The Stop Time for Occupied 1 for the chosen day will be
displayed. Use the UP ARROW and DOWN ARROW
buttons to raise or lower the time until the desired Stop
Time is shown. Press the Mode button to continue.
Calibrate Sensor — Every thermostat is factory calibrated. Under normal circumstances there will never be a need
to re-calibrate the thermostat. If re-calibration must be done,
perform the following procedure:
1. Hold down the Mode and DOWN ARROW buttons for
5 seconds. All of the icons on the display screen will appear. Release the buttons.
2. Press the Mode button. The current temperature will be
displayed.
3. Use an accurate thermometer to measure room temperature. Press the UP or DOWN ARROW buttons until the
number equals room temperature.
4. Press the Mode button to return to normal operation.
Check Thermostat Operation — To check thermostat operation, perform the following procedure:
1. Press the Mode button repeatedly until the Heat icon appears on the display. The thermostat is now in Heating
mode.
2. Press the UP ARROW button until the heating set point is
10 F (6 C) higher than the current room temperature.
Heating and fan should be energized.
3. Press the Mode button repeatedly until the Cool icon appears on the display. The thermostat is now in Cooling
mode.
4. Press the DOWN ARROW button until the cooling set
point is 10 F lower than the current room temperature.
Cooling and fan should be energized.
5. If heating, cooling, or fan operation do not energize,
check wiring and consult Table 4.
Fig. 6 — Start Time Display
9. The On/Off icon will be displayed. Use the UP ARROW
to turn the Occupied 1 period ON for this day. Use the
DOWN ARROW to turn the Occupied 1 period OFF for
this day.
10. If the Occupied 2 and/or Occupied 3 time periods were
selected in Step 1, the user is prompted to configure them.
Set the cooling set point, heating set point, start time, stop
time, and on/off configuration for Occupied 2 and 3 time
periods for that day (Sa, Su, Mo-Fr). If the Occupied 2
and 3 time periods were not selected in Step 1, skip to
Step 11. Press the Mode button to continue.
11. The program schedule will move forward to the next
day (Sa, Su, Mo-Fr). Repeat Steps 7 to 10 for that day
schedule.
Final Checklist
1. Put away tools and instruments. Clean up debris and
packaging.
2. Review Owner’s Guide with occupant or owner.
3. Leave the manuals with owner.
4
Table 3 — Daily Schedule Planner
DAY
OF THE
WEEK
Occupied 1
Start / Stop / Heat / Cool*
SCHEDULE
Occupied 2
Start / Stop / Heat / Cool
Occupied 3
Start / Stop / Heat / Cool
Unoccupied
Heat / Cool*
Monday-Friday
/
/
/
/
/
/
/
/
/
/
Saturday
/
/
/
/
/
/
/
/
/
/
Sunday
/
/
/
/
/
/
/
/
/
/
*The Heat and Cool temperature set points for Occupied 1 and Unoccupied are the same for every day.
NOTE: The cooling temperature set point must be higher than the heating temperature set point. (The temperature difference may be changed in
the advanced set up configuration.)
OPERATION
Fan Operation — If Fan On is selected, the fan will run
continuously during occupied schedule (except when Mode is
switched to OFF). The fan will be off during unoccupied
schedule except during heating or cooling operation.
If Fan On is not selected, the fan will only operate during
heating or cooling operation.
The Mode button selects the operating mode of the thermostat. If OFF is selected, the thermostat will not enter Heating or
Cooling mode. If HEAT is selected, the thermostat will only
enter Heating mode (if the room temperature is below the heating set point). If COOL is selected, the thermostat will only enter Cooling mode (if the room temperature is above the cooling
set point). If AUTO is selected, the thermostat will enter Heating or Cooling mode based on the room temperature and the
heating and cooling set points. If PROGRAM ON is selected,
the stored schedule is enabled and the thermostat will follow
the Occupied and Unoccupied schedules stored in its memory.
Emergency Heat — Emergency heat is available for
heat pump applications. This option is only available if Advanced Setup Step 5 (Heat Pump) is set to ON. To turn on
emergency heat, press and hold the Override button. While
holding the Override button, press the UP button. An ‘‘EH’’
will be displayed. During emergency heat, the fan will operate
and the second stage of heat will be energized (locking out the
first stage compressor). To exit emergency heat, press and hold
the Override button. While holding the Override button, press
the UP button. During emergency heat, only OFF and HEAT
modes are available.
Auto-Changeover — When the thermostat mode is set
to AUTO, the thermostat will provide automatic changeover
from Heating to Cooling mode and Cooling to Heating mode
when required. The thermostat will automatically switch to
maintain the desired temperature setting. The thermostat does
not need to be manually changed from heating to cooling or
cooling to heating operation.
Keypad Lock — To prevent unauthorized use of the thermostat, the front panel buttons can be disabled. To disable or
lock the keypad, press and hold the Mode button. While holding down the Mode button, press the UP and DOWN ARROW
buttons simultaneously. The ‘‘Locked’’ icon will appear on the
display.
The thermostat is unlocked by performing the same procedure. Press and hold the Mode button. While holding down the
Mode button, press the UP and DOWN ARROW buttons
simultaneously. The ‘‘Locked’’ icon will be removed from the
display.
Two-Stage Operation — The second stage of heat or
cool is turned on when the first stage has been on for a minimum of 2 minutes and the temperature differential from the set
point is equal to or greater than the set point plus the deadband
plus 2 degrees.
Clock Backup — In the event of a power loss, the thermostat will keep time for a minimum of 48 hours without
external power or batteries.
5
TROUBLESHOOTING
Table 4 — Troubleshooting
PROBLEM
Display on thermostat not illuminated.
Cooling will not energize.
Heating will not energize.
When controlling a heat pump, heat comes on during
cooling cycle.
SOLUTION
Check for 24 vac at the R terminal connection. Terminal R must be connected
for proper thermostat operation.
Select COOL mode. Decrease cooling set point to 10 degrees below room
temperature. Check for 24 vac at Y1 terminal. If present, thermostat is operating correctly and problem is with wiring or equipment. If 24 vac is not present,
replace the thermostat. Check for Compressor Cycle per Hour Limit. Cooling
may be locked out.
Select HEAT mode. Increase heating set point to 10 degrees above room temperature. Check for 24 vac at W1/O/B terminal. If present, thermostat is operating correctly and problem is with wiring or equipment. If 24 vac is not
present, replace the thermostat.
Configure thermostat for heat pump operation (Table 2, Step 5).
6
Copyright 2003 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 111
Catalog No. 535-00104
Printed in U.S.A.
Form 50QE-3SI
Pg 8
6-03
Replaces: New
Book 1
4
Tab 5a 5a