EWC Controls EWT-3707 Technical Bulletin page 6

PROGRAMMING
Auto Programming
Studies conducted by the Department of Energy estimates that
setting your thermostat back 10°F (6°C) for two 8-hour periods
during the winter can reduce your fuel bill by as much as 33%. By
setting your thermostat up to 5°F (3°C) for 2 8-hour periods during
the summer can reduce your bill by up to 25%.
Your thermostat is capable of handling up to 4 separate programs
for each day of the week. You can program all weekdays, Monday
to Friday, to the same 4 programs as shown in the table, or each
weekday have a different set of 4 programs. Similarly, weekend
programs Saturday and Sunday, can be the same 4 programs or
each weekend day can have a different set of 4 programs. Your
thermostat is preprogrammed for energy efficiency. Note that it is
easier to modify these programs than it is to program the
thermostat manually.
Time
Program Number
1
6:00 am
2 8:00 am
3 4:00 pm
4
10:00 pm
Auto Changeover
When the system mode selector is in the AUTO position, the
thermostat will automatically change between Heating and
Cooling modes depending on the room temperature difference of
your current program setting. We recommend keeping the
programmed heating and cooling temperature at least 3° apart to
allow the Auto Changeover to occur when the appropriate
temperature span has been reached. For Example, you may
have the following temperatures programmed at a given time:
Heat Set Temp = 68°F, Cool Set Temp = 78°F
If the room temperature rises above 78°F, then the thermostat will
automatically change to cool mode and turn on the air
conditioner. Likewise, the thermostat will automatically switch to
heat mode and turn on the heat when room temperature falls
below 68°F. In between 68°F and 78°F - no system operation will
occur.
Note: In Auto Changeover Mode, the Heat set-point can not be set
higher than the Cool set-point, and the Cool set-point can not be
set lower than the Heat set-point.
EWC Controls Inc. 385 Highway 33 Englishtown, NJ 07726 800-446-3110 FAX 732-446-5362
6
Temperature in °F (°C)
Heat
Cool
68°F(20°C) 78°F(26°C)
85°F(29°C)
60°F(16°C)
68°F(20°C) 78°F(26°C)
85°F(29°C)
60°F(16°C)
Copyright © 2009 EWC Controls All Rights Reserved
Manual Programming
Your thermostat can be programmed for weekdays, weekends, or
have unique programs for all 7 days. Use Weekday/Weekend
Programs or 7-day Programming to enter or revise programs to
match your Personal Program Schedule. The same steps are used
when entering steps for the first time, or revising programs entered
during Auto Programming.
Familiarize yourself with Manual Programming, so that you can
easily modify your programs as your comfort needs change. The
example below demonstrates the Manual Programming method.
NOTE:
1. The program time can be set in 10-minute increments, and
remains the same for both Heat and Cool programs.
2. The program temperature can be set in increments of 1°F.
3. If the system selector switch is in the AUTO mode, the current
operating mode will be used for programming.
4. After 15 seconds without a key press, the thermostat will return
to normal display mode.
5. When setting the time period note AM/PM indicator.
6. Auto Recovery will determine how early to turn your system on,
so that the room is comfortable at the programmed time.
Auto Recovery
Auto Recovery calculates how early to energize your system
back on, so that the room temperature is already comfortable by
the start of the comfort temperature program. Auto Recovery can
be enabled or disabled by selecting ON/OFF at Step 2 of the
installer configuration menu.
Auto Recovery will not operate if Permanent Hold or Temporary
Hold is in operation.
Home Today
This feature allows you to quickly and temporarily Override your energy
saving program setting with one key.
Press HOLD to enter the Home Today override. The highest program
/RUN
temperature for today will be selected from your programs in Heat
mode and become the set temperature. (In Cool mode, Home Today
will select the lowest program temperature for today to be the set
temperature. The display will alternate between "HOME" and the
current time. When pressed during the day, the thermostat will remain
in the Home Today mode until the first program of the next day.
If the system is changed between Heat and Cool modes (either
manually or by Auto Changeover) during the "Home Today" override
period, the set-point temperature will be automatically updated.
HOLD
Press to exit Home Today mode before the schedule ending
/RUN
time. "HOME" is no longer displayed on the LCD screen, and the
thermostat returns to the current program.
You can manually change the set-point temperature while in Home
Today mode. Refer to Setting New Temperature on page 8. This will
not affect Home Today ending time, however the set temperature will
not change automatically with a manual or automatic change between
heating and cooling.
E-Mail- info@ewccontrols.com