HOT
NEUTRAL
-5-
Unit is intended for a single power source.
To complete the wiring procedure, you will need these tools and materials:
1.
#2 Phillips head screwdriver.
2.
1/8” (x-small) straight blade screwdriver.
3.
Power supply wire, 18 awg minimum.
4.
Relay connection wires
(see state and local electrical
requirements for proper
65ºC wire gauge).
Referring to the “Power, Heating and
Cooling Relay Wiring (rear view of
controller)” illustration above, locate and
identify terminal locations for the power
supply voltage, the set point relay, and
the appropriate sensor. Connect wires
into their designated terminals and
tighten the retaining screw which will
secure the wire into place.
Power and Relay: Wiring Procedure
Power , Heating and Cooling Relay Wiring (rear view of controller)
Faceplate Layout
PROGRAMMING
SELECT “
SET
” POINT
RELAY
ACTIVE
WHEN LIT
DISPLAY
INCREASE KEY
DECREASE
KEY
Frequency Signal (Pulse Train)
The DE20 control measures frequency and com-
pares that measurement with a “standard” set of val-
ues derived from the microprocessor oscillator. Since
this is a dedicated frequency, no field calibration is
possible. Check that the DIP switches are set to OFF,
OFF, OFF (see page 13).
To enter the configuration mode, press the increase
“
È
” and decrease “
Ç
” keys simultaneously for ap-
proximately 6 seconds (display will first show inter-
nal junction value followed by “AC.0”). While the “0” is
flashing, adjust this value to “11” using the increase
“
Ç
” key. Then press the “SET” key.
The first setting to be displayed is the “
U1
” setting. See
setting summary below. By using the increase “
Ç
”,
decrease “
È
” buttons, it is possible to scroll through
the list of settings to those needing modification.
-10-
Configuration
To adjust a setting while in the “Configuration Mode”,
use the increase “
Ç
”, decrease “
È
” buttons to bring
the particular setting into the view on the display.
Press the “
SET
” button to change the value of the
setting. Once the “
SET
” button has been released,
the display will flash. Use the increase “
Ç
”, decrease
“
È
” buttons to scroll through the options for the se-
lected setting. After the option has been determined,
press the “
SET
” button once more to lock the new
value into memory.
After completing all changes to the configuration of
the control, the new configuration must be saved. To
save the new value, press the increase “
Ç
” and de-
crease “
È
” buttons simultaneously. This will cause
the control to store the new values internally and then
reset the unit.
Note: Switching off power to the unit before saving
the new configuration will cause all changes to be
lost.
Label
Settings
Description
U1
Sensor Type
Used to select the type of sensor
U2
Signal Offset
Offset value from -9 to +9 applied to reading
U3
N/A
U4
Signal Filter
Adjustable running average filter on input signals
U5
Set Point Dead Band (SP1)
Value from 1 to 99 applied to SP1
U6
N/A
U7
N/A
U8
Display Stabilizer
Reduces display instability when used in conjunction with U4
L
Set Point Limit
High set point limit for heat, cool, standby and alarm
F1
N/A
F2
Heat/Cool Switch
Toggle flag selects relay for direct vs. reverse acting
F3
Alarm Enable
Toggle flag to enable the “alarm set point” feature
F4
Unit Display Enable
Toggle flag enabling temperature units to be displayed
F5
Temperature Unit
Toggle flag to select ºF or ºC
F6
N/A
N/A
Main Menu Summary
M-33-01-02 02/17/11
M-33-01-02 02/17/11
POWER SUPPLY
100-240 v ~
50-400 hZ, 13VA
HEATER, CONTACTOR or SOLENOID
20 AMPS @ 240 VAC
1 HP @ 240 VAC
