Owner's manual

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

AZELAZEL

TECHNOLOGIES

DST-7772

SETPOINT TEMPERATURE CONTROLS

INSTALLATION AND OPERATING INSTRUCTIONS

FEATURES

Reliable Digital ElectronicAccuracy

Easy-to-Read Dual Digital Display with backlit which provides

constant readout of sensor temperature and setpoint

simultaneously, functional status and control settings. It also

allows precise setpoint and differential settings

Simple and user-friendly programming of setpoint

temperature, differential and cooling/heating modes

EEPROM memory retains control settings in the event of a

power failure

Wide adjustable setpoint with temperature range from -40 to

240°F and differential from 1 to 100°F. This enables the user to

optimize the system performance for any applications. A

tighter differential can be achieved (eg. 1°F or 1°C) than

conventional electromechanical controls

DST-7772can handle one or two sensor inputs with two

setpoints. When using two sensor inputs, each setpoint can

be corresponding to one relay output. (two single stage units

in one control)

LED indicates output relay status

Adjustable Anti-Short Cycle Delay to ensure the output relay

remains off for up to 20 minutes. This would avoid

unnecessary hard start and equipment wear

Selectable Fahrenheit or Celsius scales

Selectable Heat or Cool modes

Maximum and minimum memory for sensor temperature

Lockout mode to prevent tempering by unauthorized

personnel

Remote temperature sensor which can be extended to 500 ft.

Sensor failure and out of range indication

Easy installation and setup

Fast sampling rate (1 sec.) Of the sensor temperature for

instant control action

Easy-Connect Screwless Terminals for sensor connection

Backlit option:Auto (30 sec.)/OFF/ON

Power surge protection

APPLICATION

DST-777 series controls are microprocessor-based electronic

one or two stage setpoint temperature controls, designed to provide

one or two on/off controls (Single-Pole Double-Throw(SPDT) relay

outputs) for residential/commercial heating, cooling, air conditioning

and refrigeration applications.

The DST-777 is equipped with a Dual Digital display with backlit

that provides a constant readout of the sensor temperature and

setpoint simultaneously as well as the other programmed settings. The

front buttons allow the user to easily and accurately select the setpoint

temperature, differential and heating/cooling mode of the operation.

This reliable and versatile control has a very wide setpoint range, an

adjustable differential and time delay that makes it applicable in many

different applications. The single stage models have Pulse Width

Modulation (PWM) control logic to prevent overshoots and

undershoots in slow responding systems with large thermal mass such

as pools or slabs. A sensor probe P-01 is supplied with the control. This

solid state temperature sensor probe can be extended up to 500 feet.

MOUNTING

Mount the DST-7772 controller to a suitable surface. Slotted keyholes and

standard holes are provided for mounting purposes.

SPECIFICATIONS

6 3/8”(W) x 6 5/8”(H) x 2 3/4”(D)

Sheath: Copper

Lead: 10” of 20 AWG heat resistence wire

Dimension: 3/8" OD x 13/16" length

Operating range: -60 to 255 F (-50 to 125 C)

Sensor: 10K ohm @ 77 F (25 C ± 1%) thermistor

Can be strapped on a pipe or inserted into a temperature well

DST-7772 Two Stage Setpoint Temperature Control

P-01 Sensor Probe:

Models:

Setpoint 1 Temperature Range: -40 to 240°F(-40 to 116°C)

Setpoint 2 Temperature Range: -40 to 240°F(-40 to 116°C)

Differential 1 Adjustment: 1 to 100°F(1 to 38°C)

Differential 2 Adjustment: 1 to 100°F(1 to 38°C)

Anti-Short Cycle Delay 1: 0 to 20 min. (1-Minute increments)

Anti-Short Cycle Delay 2: 0 to 20 min. (1-Minute increments)

Temperature Display Resolution: 0.1°F/0.1°C

Accuracy: ±1°C / ±1°F

Input: 10K ohm thermistor probe(included): P-01 (designed

for strap on a pipe or insert into a temperature well)

Temperature sampling rate: 1 second

Operating Voltage: 120 or 240 VAC, 50/60Hz

Relay: 1 or 2 x SPDT, 120VAC, Full Load 16A, 1Hp

Enclosure: Flame Retardant Plastic 94V0

Weight: 3.0 lbs

Dimension:

°°

CAUTION!

1. To prevent electrical shock hazard, disconnect power supply before

installing.

2. All wiring must comply with national and local electrical codes,

ordinances, and regulations.

Never connect the load terminals to a load that takes more current than

the amount listed for the relay in the electrical ratings.

3. Azel Technologies is not responsible for damages resulting from misuse

of its products.

4. 12-18 gauge wire is recommended for 120 VAC conections;

18 or larger wire is recommended for sensor connections.

5. This literature is provided for informational purposes only.

gauge

MOUNTING THE SENSOR:

The sensor P-01 can be extended up to 500 with conventional 18 gauge

wire(or larger to keep additional resistance to a minimum). It is designed to

strap on a pipe or insert onto a temperature immersion well.

Senors should be strapped to the pipe with cable tie. The flat side of the

sensor should be resting on the pipe. In addition, they should be covered with

a layer of insulation to minimize the effects of ambient temperature for a more

reliable temperature reading.

The sensor P-01 can also be insert onto a 3/8”(10mm) or ½”(12.7mm)

ID temperature well.

Note: Do not run sensor wires parallel to other electrical wiring or telephone

wires. In case there is strong source of electromagnetic interference,

twisted pair 20AWG wire is recommended.

Summary of content (4 pages)

PAGE 1
AZEL DST-7772 SETPOINT TEMPERATURE CONTROLS TECHNOLOGIES INSTALLATION AND OPERATING INSTRUCTIONS APPLICATION SPECIFICATIONS DST-777 series controls are microprocessor-based electronic one or two stage setpoint temperature controls, designed to provide one or two on/off controls (Single-Pole Double-Throw(SPDT) relay outputs) for residential/commercial heating, cooling, air conditioning and refrigeration applications.
PAGE 2
Control Outputs ROUGH-IN WIRING Loosen the screws on the top and bottom of the enclosure and remove the wiring covers by swinging them away from the base(grey color) with the edges of the covers as pivot(see Figure 1). The base has standard 7/8” (22mm) knockouts which accept common wiring hardware and conduit fittings. Before removing the knockouts, check the wiring diagrams and use the chamber with common voltages.
PAGE 3
Terminal Representations: WIRING THE CONTROL Fuse Refer to Figure 3 for typical wiring connections. Do not use Sensor 1 wire larger than 12 AWG Temperature as jumper between 2 Setpoint terminal blocks (eg. Temperature for “120V” and “C”) SET Key Up Key 2 Down Key 93 1 Sensor Input or Sensor 2 Temperature for 2 Sensor Input 2 Reset Key Relay Output Status Indicator LED SENSOR INPUTS Before power is applied to the control, make sure that the installation and wiring connections are done correctly.
PAGE 4
Continue Programming Steps Steps Procedures Description Step 6 Press SET key again to access the stage 2 setpoint mode. The lower LCD will display the current setpoint (flashing) and the upper LCD will display S2 annunciator. Then press either the Up key to increase or the Down key to decrease the setpoint to the desired setting. Stage 2 Setpoint Temperature Default setting is: 65F Step 7 Press SET key again to access the stage 2 differential mode.