SC-Z20-NS PROGRAMMING INSTRUCTIONS
HOW IT WORKS:
The SC-Z20-NS does not control the HVAC equipment and only uses the ‘G’ fan relay to put the SC-Z20 panel in either the
occupied or unoccupied mode. This is accomplished by using the Programmable Fan option so that the fan relay is energized
during occupied mode (Always On) and de-energized during unoccupied mode (Automatic). When in Automatic mode, the fan
relay will only energize when the temperature rises above or falls below the programmed unoccupied heating and cooling
setpoints.
RECOMMENDED SETUP:
Refer to the Installation Instructions to configure the thermostat. Leave all other setup menu items not shown below in factory
default.
SYSTEM SWITCH SETTINGS:
The SC-Z20-NS contains a set of four system switches located on the thermostat printed circuit board. Make sure the system
switches are set as follows:
Sw 1 = OFF
Sw 2 = ON
Sw 3 = OFF
Sw 4 = OFF
INSTALLER SETUP MENU CHANGES:
After the thermostat is powered up, touch and hold both the
and
section for 5 second to enter the Installer Menu.
Clock
Mode
Touch
to advance forward through the menu or touch
to backup.
Mode
Fan
MENU CHANGES: (LEAVE ALL OTHER OPTIONS AT FACTORY DEFAULTS)
02 = 2
(2 schedules per day)
04 = 1
(Programmable Fan)
After the above changes have been made, touch and hold
until the thermostat exits the Installer Setup menu.
Mode
SETTING THE CLOCK AND DAY OF WEEK:
It is important that the time of day and day of the week is set properly so that occupied and unoccupied programs start on time.
1. Touch the
until the day of the week flashes. Tap the
or
arrow to select the day of the week.
Clock
UP
DOWN
2. Touch
again and the hour will flash. Tap the
or
arrow to select the correct hour. Note: PM hours are indicated
Clock
UP
DOWN
by
on the LCD.
PM
3. Touch
again and the minutes will flash. Tap the
or
arrow to select the correct minutes.
Clock
UP
Down
4. To exit the menu, touch
again.
Clock
DAYLIGHT SAVING TIME:
Refer to the User Manual and DST Chart for Daylight Saving Time option.
PROGRAMMING EVENTS:
When the thermostat is configured to provide 2 schedules per day (Occupied/Unoccupied), 7 day per week, each event is
displayed on the LCD as
(Occupied) and
(Unoccupied).
DAY
NIGHT
1. Touch
until
(Monday) flashes.
Program
Mon
2. Tap
again until the hour flashes and
is displayed on the LCD. Use the
or
arrow to set the hour start
Program
Day
UP
DOWN
time. Note: PM hours are indicated by
on the LCD.
PM
3. Tap
again until the minutes flash. Use the
or
arrow to set the minutes.
Program
UP
DOWN
4. Tap
again and the heating setpoint will flash. Leave the setpoint at the factory default of 70 degrees.
Program
5. Tap
again and the cooling setpoint will flash. Leave the setpoint at the factory default of 75 degrees.
Program
6. Tap
again and the fan option
will flash. This is the correct setting for the Day mode. If not, use the
or
Program
Always On
UP
DOWN
arrow to set the fan option from Automatic to Always On.