Owner's manual

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

SETTING THE CONTROLS

Program Mode:

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

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 stage 1 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 stage 1 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 stage 1 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 stage 1 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

Stage 1 Setpoint

Temperature

Stage 1 Differential

Temperature

Stage 1 Heating or Cooling

Stage 1 Anti-Short Cycle

time delay

The default value is

Default setting is:

Default is: minutes

75F

LCD Display

75f

8f i

Ac i

Down Key

Up Key

Reset Key

Backlit Switch

2 Setpoint

Temperature for

1 Sensor Input or

Sensor 2 Temperature

for 2 Sensor Input

Sensor 1

Temperature

Fuse

Relay Output

Status

Indicator LED

SET Key

WIRING THE CONTROL

Refer to Figure 3 for

typical wiring

connections. Do not use

wire larger than 12 AWG

as jumper between

terminal blocks (eg.

“120V” and “C”)

Programming Steps

POWER ON

All the slide switches (Backlit and Sensor Inputs) 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 - “2SP” is displayed. Then the control will run Anti-short cycle delay(if any) and goes into normal operating mode.

If 1 sensor input is selected, the Upper LCD will display the current sensor 1 temperature and the Lower LCD will display the two setpoint temperature

alternatively.

If 2 sensor input is selected, the Upper LCD will display the current sensor 1 temperature and the Lower LCD will display current sensor 2 temperature.

RESET

Figure 3: Typical Wiring Diagram for DST-7772

with 120Vac Load

Terminal Representations:

RELAY 1/RELAY 2

SENSOR INPUT

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

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

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

controlling relay 1by Stage 1 setpoint.

S2 S2 are the input terminals for sensor probe P-01for

controlling relay 2 by Stage 2 setpoint.

S2 S2

SENSOR

INPUTS

240V COM 120V

RELAY 1

NOCNC

SENSOR INPUTS

AC INPUT

120 VAC

(HOT)

(COM)

LOAD

SENSOR

PROBE

(P-01)

RELAY 2

NOCNC

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

S1 S1