Install Instructions

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 designaon.
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 o 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 Heang Example
Figure 2: Two Stage Cooling Example
Figure 1: Two Stage Heang Example
Lockout Switch
The ETC is provided with a lockout switch to prevent tampering by
unauthorized personnel. When placed in the LOCK posion, the keypad
is disabled and no changes to the sengs can be made. When placed
in the UNLOCK posion, the keypad will funcon 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 boom. (see Figure 4). To disable the keypad, slide the
switch to the le LOCK posion. To enable the keypad, slide the switch
to the right UNLOCK posion. All ETC controls are shipped with this
switch in the UNLOCK posion.
Step 3 Press the SET key again to access the stage 1 dierenal.
The LCD will display the current dierenal and the DIF 1
annunciator will be blinking on and o to indicate that the
control is in the dierenal mode. Then press either the
up Ç key to increase or the down È key to decrease the
dierenal to the desired seng.
Step 4 Press the SET key again to access the stage 1 cooling or heang
mode. The LCD will display the current mode, either C1 for
cooling or H1 for heang. Then press either the up Ç or
down È key to toggle between the C1 or H1 designaon.
Step 5 Press the SET key again to access the An-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 nish 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 o 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 dierenal.
The LCD will display the current dierenal and the DIF 2
annunciator will be blinking on and o to indicate that the
control is in the dierenal mode. Then press either the
up Ç key to increase or the down È key to decrease the
dierenal to the desired seng.
Step 8 Press the SET key again to access the stage 2 cooling or heang
mode. The LCD will display the current mode, either C2 for
cooling or H2 for heang. Then press either the up Ç or
down È key to toggle between the C2 or H2 designaon.
Press the SET key once more and programming is complete.
Step 9 Press the SET key again to access the An-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 nish the programming.
Refer to Page 3 for an illustrated guide to programming the ETC.
NOTE: The ETC will automacally end programming if no keys are
depressed for a period of thirty seconds. Any sengs that have
been input to the control will be accepted at that point.
All control sengs are retained in non-volale memory if power to
ETC is interrupted for any reason. Re-programming is not necessary
aer power outages or disconnects unless dierent control sengs
are required.