User Manual

ManualsBrandsAZEL ManualsRelaySINGLE STAGE AND TWO STAGE DIGITAL SETPOINT TEMPERATURE CONTROL: DST-777

SETTING THE CONTROLS

QuickSet Feature:

Program Mode:

Quickset allows the user to change the setpoint temperature instantly without entering the program mode. Simply press (increase) or (decrease) key

during the normal operating mode. When the key is pressed, the setpoint is flashing to indicate that the setpoint value can be changed. Press the

button again to adjust the setpoint (press and hold for auto repeat function). Press key when finish or just walk away and it will return to normal mode after 30

seconds.

UP Down

Up/Down UP/Down

SET

General Note:

Press and hold the Key or Key to change the value continuously (auto repeat function).

To return to normal operating mode from the program mode, press and hold the key for 3 seconds. However, the system also return to normal operating

mode if no key is pressed for 30 seconds.

During the program mode, each time key is pressed, the data will be saved into the EEPROM and advance to the next setting(parameter). If no change of

value is required, just press key once to go to the next step (parameter).

Up Down

SET

Steps

Step1

Step 2

Step 3

Step 4

Step 5

Procedures

SET

Up Down F C

SET

Up Down

SET

dF1

Up Down

SET

H1 C1

Up Down

C1 H1

SET

AC1 Up Down

SET

To start programming, press the key for 3 seconds to access the

Fahrenheit/Celsius mode. The lower LCD display will show the current status,

either for degrees Fahrenheit or for degrees Celsius. This annunciator will be

flashing. Then press either or key to toggle between the or scales.

Press key again to access the setpoint mode. The lower LCD will display the

current setpoint (flashing) and the upper LCD will display annunciator. Then

press either the key to increase or the key to decrease the setpoint to

the desired setting.

** Please note that this value as well as all the temperature related value are

in degree Fahrenheit as set in step 1.

Press key again to access the differential mode. The lower LCD will display

the current differential (blinking) and the upper LCD will display annunciator.

Then press either the key to increase or the key to decrease the

differential to the desired setting.

Press key again to access the heating or cooling mode. The upper LCD will

display the current mode, with flashing annunciator, either for heating or

for cooling. Then press either the key or the key to toggle between the

or operation.

Press key again to access the Anti-Short Cycle time delay. The lower LCD

will display the current time delay(blinking), in minute and the upper LCD will

display . Then press either the key to increase or the key to

decrease the delay to the desired setting. The increment is in 1 minute. Press

key again to go back to normal operating mode.

Description

Fahrenheit or Celsius Scale

Setpoint Temperature

Differential Temperature

Cooling or Heating

Anti-Short Cycle time delay

The default value is

Default setting is:

Default is: minutes

75F

LCD Display

75f

8f i

Ac i

S1 S1

PWM

OFF

240V COM 120V

RELAY 1

NCCNO

SENSOR INPUTS

AC INPUT

Down (Arrow)

Button

Up (Arrow)

Button

Reset Button

Backlit Switch

Setpoint

Temperature

Sensor

Temperature

Fuse

Relay Output

Status

Indicator LED

SET Button

PWM Switch

120 VAC

(HOT)

(COM)

LOAD

SENSOR

PROBE

(P-01)

Figure 5: Typical Wiring Diagram for DST-777D

with 120Vac Loads

WIRING THE CONTROL

Refer to Figure 4 for

typical wiring connections

for DST-777S and Figure

5 for DST-777D . Do not

use wire larger than 12

AWG as jumper between

terminal blocks (eg.

“120V” and “C”)

Programming Steps for Normal Control Mode (ON/OFF Control)

Note: Set PWM slide switch to OFF

POWER ON

All the slide switches (Backlit and PWM) should be set before the control is powered up (so the desired switch settings are scanned by the microprocessor).

However if the settings on the slide switches are changed after power is supplied, press the key so that the switch settings can be updated.

When the control is powered up, the model ID is displayed. Then the control will run Anti-short cycle delay(if any) and goes into normal operating mode in which

the Upper LCD will display the current sensor temperature and the Lower LCD will display the setpoint temperature.

RESET

Figure 4: Typical Wiring Diagram for DST-777S

with 120Vac Load

Terminal Representations:

240V is the hot of the 240Vac line voltage

COM is the neutral or ground of the line voltage

120V is the hot of the 120Vac line voltage

RELAY 1/RELAY 2

NC is Normally Close of SPDT switch and opens

when the relay is energized

C is Common of the SPDT switch

NO is Normally Open of the SPDT switch and closes

when the relay is energized

SENSOR INPUT

S1 S1 are the input terminals for sensor probe P-01

S1 S1

PWM

OFF

240V COM 120V

RELAY 1

NCCNO

SENSOR INPUTS

AC INPUT

120 VAC

(HOT)

(COM)

LOAD

SENSOR

PROBE

(P-01)

RELAY 2

NC C NO

LOAD

Checkout

! Before power is applied to the

control, make sure that the

installation and wiring

connections are done correctly.

Also, ensure that the wires

connecting to COM and 120V

are not touching each other.

! Ensure that wires of the senor

probe are not touching each

other