2
Programming Steps and Display Mode
The ETC two stage can be programmed in seven simple steps using the
LCD display and the three keys on the face of the control.
Step 1 To start programming, press the
SET
key once to access the
Fahrenheit/Celsius mode. The display will show the current
status, either
F
for degrees Fahrenheit or
C
for degrees
Celsius. Then press either the up
Ç
or down
È
arrow key
to toggle between the
F
or
C
designation.
Stage 1
Step 2 Press the
SET
key again to access the stage 1 setpoint. The
LCD will display the current setpoint and the
S1
annunciator
will be blinking on and off to indicate that the control is in the
setpoint mode. Then press either the up
Ç
key to increase
or the down
È
key to decrease the setpoint to the desired
temperature.
Figure 3: One Stage Cooling and One Stage Heating Example
Figure 2: Two Stage Cooling Example
Figure 1: Two Stage Heating Example
Lockout Switch
The ETC is provided with a lockout switch to prevent tampering by
unauthorized personnel. When placed in the
LOCK
position, the keypad
is disabled and no changes to the settings can be made. When placed
in the
UNLOCK
position, the keypad will function normally.
To access the lockout switch, disconnect the power supply and open
the control. The switch is located on the inside cover about 2 inches
above the bottom. (see Figure 4). To disable the keypad, slide the
switch to the left
LOCK
position. To enable the keypad, slide the switch
to the right
UNLOCK
position. All ETC controls are shipped with this
switch in the
UNLOCK
position.
Step 3 Press the
SET
key again to access the stage 1 differential.
The LCD will display the current differential and the
DIF 1
annunciator will be blinking on and off to indicate that the
control is in the differential mode. Then press either the
up
Ç
key to increase or the down
È
key to decrease the
differential to the desired setting.
Step 4
Press the
SET
key again to access the stage 1 cooling or heating
mode. The LCD will display the current mode, either
C1
for
cooling or H1 for heating. Then press either the up
Ç
or
down
È
key to toggle between the
C1
or H1 designation.
Step 5 Press the
SET
key again to access the Anti-short Cycle
Compressor Delay when in Cooling Mode. Press the up
Ç
or
down
È
keys to set the delay from 1 to 20 minutes. Press
SET
key again to finish the programming.
Stage 2
Step 6 Press the
SET
key again to access the stage 2 setpoint. The
LCD will display the current setpoint and the S2 annunciator
will be blinking on and off to indicate that the control is in the
setpoint mode. Then press either the up
Ç
key to increase
or the down
È
key to decrease the setpoint to the desired
temperature.
Step 7 Press the
SET
key again to access the stage 2 differential.
The LCD will display the current differential and the DIF 2
annunciator will be blinking on and off to indicate that the
control is in the differential mode. Then press either the
up
Ç
key to increase or the down
È
key to decrease the
differential to the desired setting.
Step 8
Press the
SET
key again to access the stage 2 cooling or heating
mode. The LCD will display the current mode, either C2 for
cooling or H2 for heating. Then press either the up
Ç
or
down
È
key to toggle between the C2 or H2 designation.
Press the
SET
key once more and programming is complete.
Step 9 Press the
SET
key again to access the Anti-short Cycle
Compressor Delay when in Cooling Mode. Press the up
Ç
or
down
È
keys to set the delay from 1 to 20 minutes. Press
SET
key again to finish the programming.
Refer to Page 3 for an illustrated guide to programming the ETC.
NOTE: The ETC will automatically end programming if no keys are
depressed for a period of thirty seconds. Any settings that have
been input to the control will be accepted at that point.
All control settings are retained in non-volatile memory if power to
ETC is interrupted for any reason. Re-programming is not necessary
after power outages or disconnects unless different control settings
are required.
