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5

Table 3 — Daily Schedule Planner

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.)

7. The Start Time for Occupied 1 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. 7.

8. The Stop Time for Occupied 1 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.

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. Repeat Steps 2 through 9 to program the remaining

schedule for Occupied periods 2 and 3.

11. The Copy command can be used to copy the previous

day’s schedule if the schedules are the same. The copy

command becomes available after all the occupied peri-

ods are programmed in a day. Use the UP ARROW to

change the copy command to YES. Use the DOWN

ARROW to change the copy command to NO. Press the

Mode button when the choice has been made. See Fig. 8.
If NO was selected, the schedule will automatically

change to the next day and the user must enter the occu-

pied and unoccupied schedules for that day.
NOTE: Occupied 1 schedule heating and cooling set

points are the same for each day. Occupied 2 and 3 set

points may be set to different values for each day of the

week.
If YES was selected, the schedule will be copied to the

next day. The schedule copy may be repeated until

Sunday is reached. The Sunday schedule cannot be

copied to Monday.

12. After all the times and set points for each day have been

entered, press the Program button 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 mid-

night. 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 an-

other occupied period, the lower numbered schedule has priori-

ty. 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.

Calibrate Sensor — 

Every thermostat is factory cali-

brated. 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 Fan buttons for 5 seconds. All

of the icons on the display screen will appear. Release

the buttons. Press the UP and DOWN ARROW buttons

simultaneously.

2. Press the UP and DOWN ARROW buttons simulta-

neously again. The current temperature will be displayed.

3. Use an accurate thermometer to measure room tempera-

ture. Press the UP or DOWN ARROW buttons until the

number equals room temperature.

4. Press the Mode button to return to normal operation.

DAY

OF THE

WEEK

SCHEDULE

Occupied 1

Occupied 2

Occupied 3

Unoccupied

Start / Stop / Heat / Cool

Start / Stop / Heat / Cool

Start / Stop / Heat / Cool

Heat / Cool

Monday

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/

Tuesday

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Wednesday

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/

Thursday

/

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/

Friday

/

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Saturday

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Sunday

/

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/

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/

/

Fig. 7 — Start Time Display

Fig. 8 — Copy Command Display

Summary of Contents for AQUAZONE 50QE900

Page 1: ...r property damage GENERAL The 7 day commercial programmable thermostats 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 tempera...

Page 2: ...re length and routing to allow proper closure of the thermostat Strip each wire at the end no more than 1 4 in to prevent adjacent wires from shorting together Match and connect wires to terminals on the thermostat See Fig 2 5 and Table 1 9 Push excess wiring into wall Seal hole in wall to prevent drafts 10 Re attach thermostat cover to back plate by aligning the top two prongs of the back plate i...

Page 3: ...ser to reset the Service Filter counter to zero and remove the SERVICE FILTER icon if displayed on the thermostat screen Press the OVERRIDE button while in Setup Step 3 and the counter is reset to zero Press the arrow buttons to ad just the number of hours the blower will run before the SER VICE FILTER icon is displayed The range is 0 to 1950 hours Set the variable to 0 to disable this function Th...

Page 4: ...arity for the heat pump The vari able 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 Program Thermostat Schedules Before pro gramming the thermostat plan the thermostat daily schedule The schedule is divided into 7 days Monday through Sunday Each day has from 2 to 4 time periods Occupied 1 Occupied 2 Occupied 3 Unoccu...

Page 5: ... been entered press the Program button 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 mid night ...

Page 6: ...the deadband plus 2 degrees Clock Backup In the event of a power loss the ther mostat will keep time for a minimum of 48 hours without external power or batteries 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 sel...

Page 7: ...ower operation timer to 0 hours Cooling Will Not Energize Select COOL mode Decrease cooling set point to 10 degrees below room temperature Check for 24 vac at Y1 terminal If present ther mostat is operating correctly and problem is with wiring or equipment If 24 vac is not present replace the thermostat Check for Compres sor Cycle per Hour Limit Cooling may be locked out Heating Will Not Energize ...

Page 8: ...ntinue or change at any time specifications or designs without notice and without incurring obligations Catalog No 04 53500037 01 Printed in U S A Form 50QE 7SI Pg 8 7 07 Replaces 50QE 2SI Book 1 4 Tab 5a 5a Copyright 2007 Carrier Corporation ...

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