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The European Union is generally ahead of the North America in restricting toxic substances in electronic products. Their latest restrictions, known as RoHS (Restriction of Hazardous Substances), went into effect in July 2006. The backdrop to the introduction of RoHS was one of increasing environmental regulations worldwide and increasing concern for human health and safety and ecosystems around the world. Hazardous chemicals in products were fast becoming a health and environmental concern.

We are dedicated to developing innovative design solutions that maximize the function and value of our products while minimizing the impact on the environment. These efforts include careful selection of materials to ensure product quality while making it easier for consumers to recycle materials at the end of a product's functional life. Azel Technologies is committed to meeting the requirements of the European Union Directive on RoHS in our products.The RoHS directive restricts the presence of certain substances including lead, hexavalent chromium, mercury, cadmium and two brominated flame retardants - polybrominated biphenyls (PBB) and polybrominated diphenyl ethers (PBDE). Through design choice and substitution, we've continually avoided or eliminated the use of certain materials of concern in our products.

.DST SERIES (DST-777S, DST-777D, DST-7772) DIGITAL SETPOINT TEMPERATURE CONTROLS

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 output) 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 set point temperature, differential and heating/cooling mode of the operation. Unique QuickSet feature allows instant setpoint adjustment without entering programming mode. 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.

APPLICATIONS:

The DST series can be used for a wide variety of applications:

  • Slab thermostat for radiant floor heating
  • Tank Heating
  • Boiler control (used as a thermostat)
  • Space and return air temperature control
  • Condenser fan cycling
  • Milk coolers
  • Cooling tower pump control
  • Refrigerated warehouses
  • Chillers
  • Beer and beverage coolers
  • Refrigerated display cases
  • Walk-in and reach-in refrigerators
  • Other applications: research, science, laboratory, education, aquarium, hydroponics, pools and more

Pulse Width Modulation (PWM)

The single stage models (DST-777S, DST-777D) offer optimum control by means of a Pulse Width Modulation. The ON and OFF cycle vary depending on the difference between the sensor and setpoint temperature. The bigger difference between the sensor and setpoint temperature, the longer the relay is switched ON. When the sensor temperature approaches the setpoint temperature, the ON time become shorter and shorter. Pulse Width Modulation guarantees precise control response. This function prevents overshoots and undershoots in systems with large thermal mass (eg. slabs or pools).

     DST-777 SINGLE STAGE AND TWO STAGES DIGITAL SETPOINT TEMPERATURE CONTROL     

 

Please click to view PDF Brochure        DST-777S/DST-777D PDF Installation Instructions                  DST-7772 PDF Installation Instructions

 

FEATURES:

  • Reliable Digital Electronic Accuracy
  • QuickSet feature allows instant setpoint adjustment without entering programming mode
  • Easy-to-Read Dual Digital Display with backlit which displays 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 electro mechanical controls
  • Advanced PWM (Pulse Width Modulation) Control to achieve high control accuracy on single stage models
  • Fast sampling rate (once/second) of the sensor temperature for instant control action
  • Choice of one or two stage models
  • One or two SPDT relay outputs. Model: DST-7772(two stage) can handle one or two sensor inputs with two setpoints. When using two sensor inputs, each setpoint can be corresponding to one relay output. (Two 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 switch 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
  • Easy-Connect Screwless Terminals for sensor connection
  • Backlit option: Auto (30 sec.)/OFF/ON
  • Power surge protection

SPECIFICATIONS:

  • Setpoint Temperature Range: -40 to 240°F(-40 to 116°C)
  • Temperature Display Resolution: 0.1°F/0.1°C
  • Differential Adjustment: 1 to 100°F(1 to 38°C)
  • Anti-Short Cycle Delay: 0 to 20 min. (1-Minute increments)
  • PWM Cycle Length: 30 to 1500 sec. (10-Second Increments)
  • PWM Differential: 3 to 50°F (2 to 25°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)
  • Operating Voltage: 120VAC, 50/60Hz
  • Temperature sampling rate: once/sec.
  • Relay: 1 or 2 x SPDT, 120VAC, Full Load 10A, 1Hp
  • Enclosure: Flame Retardant Plastic 94V0
  • Weight: 3.0 lbs
  • Dimension: 6 3/8”(W) x 6 5/8”(H) x 2 3/4”(D)

     UNIVERSAL DIGITAL SETPOINT TEMPERATURE CONTROLS DST-900 - ONE STAGE  * DST-922 - TWO STAGE   

Please click to view PDF Brochure                         DST-900/902/922 PDF Installation Instructions

DST series was conceived on purpose to be installed on switchboards, panel boards, heating/cooling units and other applications.

FEATURES:

  • Reliable Digital Electronic Accuracy
  • Easy-to-Read Digital Display which displays sensor temperature and functional status. It also allows precise setpoint and differential settings
  • Simple programming of setpoint temperature, differential and cooling/heating modes. Setpoint can be adjusted easily wihout going into programming mode.
  • Wide adjustable setpoint with temperature range from -39 to 248°F ( -39 to 120°C) and differential from 0 to 18°F (0 to 10°C). This enables the user to optimize the system performance for any applications. A tighter differential can be achieved (eg. 1F or 1C) than conventional electromechanical controls
  • Anti-Short Cycle Delay to ensure the output relay remains off for up to 254 secs. This would avoid unnecessary hard start and equipment wear
  • Cooling applications include automatic defrost timing as well as manual defrost
  • User selectable Celsius or Fahrenheit scales
  • Adjustable temperature offset to compensate any deviation from the real temperature value
  • Selectable decimal point or unit resolution
  • Lockout switch to prevent tempering by unauthorized personnel
  • A universal 10K ohm sensor P-01 is supplied with the control. This solid state temperature sensor probe can be extended up to 500 feet.
  • Easy installation

SPECIFICATIONS:

  • Setpoint range:-39 to 248°F ( -39 to 120°C)
  • Differential: 0 to 18°F(0 to 10°C)
  • Anit Cycling Delay: 0 to 254 sec.
  • Output: 1 SPDT 250VAC 16A max resistive (1HP), + 1 SPDT 250VAC 8A max resistive (0.5HP) only for DST-922
  • Resolution: 0.1°C (0.2°F) or 1°C (1 or 2°F)
  • Accuracy: ± 1°F
  • Display: High intensity Green LED, 3 digits, 13.2 mm
  • Data storing: on EEP-ROM not volatile memory
  • Operating temperature: 23 to 122 °F (-5 to +50 °C)
  • Sensor Probe: Model: P-01, 10K ohm NTC (included)
  • Relative humidity: 30 to 90 % (not condensing)
  • Power supply: 115VAC ± 10%, 50/60Hz

DST-900PR/DST902PR/DST-922PR (DIN Rail models)

  • Housing: self-extinguish UL94V0 ABS plastics, white colour
  • Size: frontal 45 x 71 mm; depth 58 mm (4 DIN modules)
  • Mounting: DIN rail for panel boards

DST-900E/DST902E/DST-922E (Aluminium Enclosure models)

  • Housing: premium quality aluminium enclosure with blue powder coat cover
  • Size: 8" x 4" x 2"
  • Included dual row terminal block for universal wiring needs

 

     i-Link SERIES ZONE CONTROLS ( CIRCULATOR PUMP SWITCHING RELAYS ) FOR HYDRONIC HEATING ( RADIANT FLOOR HEATING ) SYSTEMS   

A NEW ERA IN HYDRONIC RADIANT FLOOR HEATING ZONE CONTROLS...

The i-Link series multi-zone circulator pump switching relays simplify wiring for hydronic heating ( radiant floor heating ) systems. With leading edge features and superior product design, i-Link makes installation quick and easy.

Available in one to six zone models. The i-Link series are designed with flexibility and multi-zone applications in mind. It is so flexible that different models can be interconnected for unlimited zone expansion. In addition, i-Link provides far more functional status than other models on the market today because of their front panel LED indicators that provide the easy system diagnostics demanded by today’s installers. Each unit is designed with a unique power surge protection to ensure continuous control operation and avoid damage and trouble to replace the unit.

 Selectable Priority with Protection Timer

Priority Protection timer available in two to six zone models prevents freeze-ups in the event of a priority zone failure. SP-84, SP-85, SP-86 are equipped with field selectable priority by-pass function to ensure continuous operation of secondary zones which allow maximum flexibility for system applications.

From design to manufacture, each i-Link unit is built on the foundations of quality and reliability. Azel products are quality controlled in order to achieve “total customer satisfaction” - a foundation that you can rely on.

GENERAL FEATURES:

  • Front panel indicator lights
  • Fuse protection
  • Power surge protection
  • Easy-Connect Terminals/Screwless Terminals for Thermostat Connections
  • Compact and modern design
  • Safety design with all electronic components hiding behind the enclosure
  • Simplified wiring
  • Universal Design: Cold Start or Tankless Coil Boiler
  • Contractor friendly PCB layout
  • High Capacity Field Replaceable Transformer
  • 24VAC transformer output with common terminal provides compatibility with electronic thermostat
  • Universal thermostat compatibility
  • 100% Factory Tested
  • Extended 3 year warranty

ADDITIONAL FEATURES(SP-82 TO SP-86):

  • Unlimited zone expansion
  • Priority timer for protection of a priority zone malfunction and prevention of freeze-ups in the heating zones
  • Field selectable priority
  • Capable of turning on an extra system circulator
  • SP-84/85/86: Manual priority override(bypass) for each of the secondary zone
  • Isolated End Switch and Priority End Switch for utilizing full functionality of high efficiency Mod-Con boilers

              SPECIFICATIONS:                                                                                                      

Model:  SP-81 1 Zone Switching Relay
  SP-82 2 Zone Switching Relay
  SP-83 3 Zone Switching Relay
  SP-84 4 Zone Switching Relay
  SP-85 5 Zone Switching Relay
  SP-86 6 Zone Switching Relay
Power Supply:   120 VAC, 50/60Hz
Dimensions:    6 3/8”(W) x 6 5/8”(H) x 2 3/4”(D)
Electrical Switch Rating:   10 A 1/3 HP @ 120VAC
Thermostat Anticipator Setting:   0.18 A
Enclosure:    Flame Retardant Plastic 94V0
Shipping Weight:   SP-81/82/83 3 lbs; SP-84/85/86 4 lbs.

                                                                                                                                                        

       Please click to view PDF Brochure                  SP-81 PDF Installation Instructions                  SP-82 to SP-86 PDF Installation Instructions

                                                                                 SP-81 to D-508F Instructions                            ilink to D-508F - 3 wire connections

                                                                                 SP-86 to D-508F Instructions                             ilink to NEST thermostat connections

     i-Link SERIES ZONE VALVE CONTROLS  FOR HYDRONIC HEATING ( RADIANT FLOOR HEATING ) SYSTEMS   


The i-Link series Zone Valve Controls simplify the field wiring and yet control up to six zone valves in a multi-zone hydronic radiant heating system. The contractor friendly Printed Circuit Board eliminates the problem caused by incorrect wiring and saves hours of installation time. There would be no more “messy” look of conventional zone valve installations.

Intelligent Linking System (i-Link) allows unlimited zone expansion with additional i-Link controllers. Field selectable priority with Priority Protection Timer ensures other zones get heat every one hour and prevents freeze-ups in the event of a priority zone failure. The End Switch delay timer let the two wire type zone valves fully opened before turning on the circulator. The panel provides EZ screwless terminal blocks for connections to the thermostats and zone valves. In addition, LED indicators on the front panel provide functional status and easy troubleshooting.
 

GENERAL FEATURES:

  • Front panel indicator lights
  • Field selectable Priority
  • Priority timer for protection of a priority zone malfunction and prevention of freeze-ups in the heating zones
  • Unlimited zone expansion
  • Dual Isolated End Switches for SZ-84/86DX
  • Three-minute End Switch delay timer for two wire type zone valve applications. Circulator will start only after the zone valve is fully opened.
  • DIP switch for easy setup of two wire type zone valve applications. No need to hook up wire jumper on the third and fourth terminals on each zone
  • Works with two, three or four wire type zone valves and thermostats
  • Compact and modern design
  • Safety design with all electronic components hiding behind the enclosure for SZ-84/86DX
  • Fuse protection
  • Simplified wiring
  • Contractor friendly PCB layout
  • Easy-Connect Screwless Terminals
  • 24VAC transformer output with common terminal provides compatibility with electronic thermostats
  • Universal thermostat compatibility
  • 100% Factory Tested
  • Extended three year warranty

    ADDITIONAL FEATURES FOR SZ-V4/SZ-V6
  • Isolated End Switch and Priority End Switch for utilizing full functionality of high efficiency Mod-Con boilers
  • Pre-wired terminals for circulator
  • SPDT Priority zone relay switch (N/O Com N/C). Capable of prioritizing DHW pump in a 2-pump system
  • 50VA Field Replaceable Transformer

             SPECIFICATIONS:                                                                                                      

Model:  SZ-84DX 4 Zone Valve Control
  SZ-86DX 6 Zone Valve Control
Power Supply:   24 VAC, 50/60Hz
Dimensions:    6 3/8”(W) x 6 5/8”(H) x 2 3/4”(D)
Electrical Switch Rating:   10 A 1/3 HP @ 120VAC
Thermostat Anticipator Setting:   0.18 A
Enclosure:    Flame Retardant Plastic 94V0
Shipping Weight:   3 lbs

 

Model:  SZ-V4 4 Zone Valve Control with transformer
  SZ-V6 6 Zone Valve Control with transformer
Power Supply:   120 VAC, 50/60Hz
Dimensions:    11”(W) x 6 5/8”(H) x 3”(D)
Electrical Switch Rating:   10 A 1/3 HP @ 120VAC
Thermostat Anticipator Setting:   0.18 A
Enclosure:    Aluminum
Shipping Weight:   5 lbs

       Please click to view PDF Brochure                 SZ-84/86DX PDF Installation Instructions                  SZ-V4/V6 PDF Installation Instructions

 

     DIGIT-STAT DS-60 DIGITAL TEMPERATURE GAUGE FOR HYDRONIC HEATING/SOLAR HEATING/GEOTHERMAL SYSTEM    

Please click to view PDF Brochure

The microprocessor-based, AZEL Technologies Digital Temperature gauge DS-60 represents the “next generation” in temperature gauge industries. The bold, hi-contrast LCD display ensures accurate temperature reading to the tenth degree and can be easily read from greater distances than the typical mechanical temperature gauge.

DS-60 REPLACES TWO mechanical temperature gauges as it can centralize the readings in one spot and simultaneously display the accurate temperatures of supply and return piping on a hydronic heating system. In addition, the solid state temperature sensor probe can be extended up to several hundred feets. The unit is designed to be powered by 24VAC input or by lithium battery. When 24VAC is supplied, the lithium battery enable the unit to work in case of power failure. Its features also include Min/Max memory which shows the highest and lowest temperature after the last reset and instant Fahrenheit to Centigrade conversion. DS-60 is also ideal for any application (EG. Solar heating or Geothermal) that requires quick and accurate response to temperature change, an easy to read display and a wide temperature range.

FEATURES:

  • Dual Large LCD (Liquid Crystal Display) to show supply and return temperature
  • Min/Max memory can be selected for both OUT(Supply) and IN (Return) water temperature since the last time RESET button was pressed.
  • Celsius or Fahrenheit switch on the front unit.
  • Dual Power input: 24VAC or Lithium Battery (24VAC input has priority over Lithium Battery input if both power inputs are applied)
  • Easy installation
  • Frequent sample rate dictate any change in temperature instantly

SPECIFICATIONS:

  • Display: Dual LCD (Liquid Crystal Display)
  • Temperature range: -58F to 302F (-50C to 150C)
  • Resolution: 0.1F(0.1C).
  • Accuracy: ±1C / ±2F
  • Sample rate: 3 Secs.
  • Input: 2 x 10K ohm thermistor probe model: P-03 (designed for strap on a pipe or insert into a temperature well)
  • Operating Voltage: 24VAC or Lithium Battery (included, last for over 3 years)
  • Size: 3.5” x 2.0” x 0.9” (88.9mm x 50.8mm x 22.86mm)
  • Enclosure: Flame-retardant plastic
  • Operating Temperature: 32 to 122F(0 to 50C)
  • Weight: 0.11lbs (50g)

   Universal Sensor Probe Model: P-01, P-03    

The Azel Sensor Probe is engineered to ensure long life and rapid response. It is designed to strap on a pipe or insert into a temperature well. P-01 is specially designed for use with DST-900 and DST-777 series and other controls that require 10K ohm thermistors. P-03 is designed for DS-60P.

SPECIFICATIONS:

  • Sheath: Copper
  • Lead: 10” of 20 AWG heat resistence wire
  • Dimension: 3/8" OD x 13/16" length (9.5mm OD x 20.6mm)
  • Weight: 0.02lb (10g)
  • Operating range: -60 to 255F (-50 to 125C)
  • Senor: 10K ohm @ 77F (25 C ± 1%) thermistor
  • Measuring range: P-01: -40 to 240°F(-40 to 116°C) for DST-900 & DST-777 series, P-03: -58 to 302°F(-50 to 150°C) for DS-60P only

     NON-PROGRAMMABLE DIGITAL THERMOSTATS  

D-135E (24VAC)

Please click to view PDF Brochure

D-135EB (Battery Operated)

Please click to view PDF Brochure

D-135ES (24VAC)

Please click to view PDF Brochure


The D-135 series thermostat is a stand-alone microprocessor based thermostat with large LCD display that takes the guess work out of reading the temperature. The D-135 maintains highly accurate temperature control without the programming hassle. The thermostat is designed to control room temperature by way of on/off controlling the heating (and cooling) equipments. The setpoint is displayed and can be changed easily by pressing up or down arrow button.

D-135EB is battery operated and only two wires are required to run through the wall to the mechanical room.  

D-138 has a unique “spinning-switch” dial allows instant setpoint change of ±3°F as quick as a flash. This simple to use accurate thermostat will replace most round, square or rectangular thermostats. D-135 is environmentally safe, mercury-free which requires no leveling, so there’s no hassle, and no special disposal requirements.

FEATURES:

  • Deluxe standard Heat Only
  • Reliable Digital Electronic Accuracy
  • EEPROM (memory) for setting backup
  • Adjustable differential setting
  • Anti-short cycle delay
  • On/Off switch (D-135ES)
  • Battery Operated two wire type thermsotat (D-135EB)
  • Heat icons displays when calling for heat
  • Contains NO Mercury, environmentally safe
  • Accurate Universal Replacement
  • No Leveling Required
  • Low Voltage (24 VAC) Systems
  • Only 2 wires needed to power thermostat, no need to change battery in the future
  • Display in °F
  • Modern design
  • Built-in Digital Control System instantly

SPECIFICATIONS:

  • Display Format: Liquid Crystal Display(LCD)
  • Power Supply: 24 Vac, 50-60Hz (D-135E, D-135ES, D-138)
  • Battery Operated: AAA x 3 (D-135EB)
  • Contact Rating: 7A Resistive (3A inductive)
  • Sampling Rate: 1 Minute
  • Accuracy: ±1°F
  • Switch Differential: 0.5 to 2.0°F (D-138)
  • Size: 2.9"H x 2.9"W x 1.1"D
  • Temperature Control Range: 40-95°F Weight: 0.11lbs (50g)

      NON-PROGRAMMABLE DIGITAL THERMOSTAT FOR RADIANT FLOOR HEATING   

D-508F: UNIVERSAL HYDRONIC RADIANT FLOOR HEATING THERMOSTAT (SLAB SENSING THERMOSTAT)

Please click to view PDF Brochure                   Please click to view PDF Instruction

D-508F digital non-programmable heat only thermostat is designed to control either ambient(air) temperature (A Mode) or floor temperature (F Mode) or a combination of ambient temperature with floor temperature limits(AF Mode). An auxiliary remote sensor is provided to measure slab temperature in order to control the floor temperature(within maximum and minimum limits in AF Mode) in hydronic radiant floor heating system. It can also be used for sensing the outdoor temperature in A Mode.

FEATURES:

  • Easy-to-Read Digital Multi-Display with backlit which provides constant readout of two sensor temperatures(eg. ambient and floor) and setpoint simultaneously, functional status and control settings.
  • Three temperature control modes:
    A Mode : controls ambient temperature
    F Mode : controls floor temperature. Also displays current ambient temperature.
    AF Mode: controls the ambient temperature and maintains the floor temperature within the desired minimum limit for floor warming and maximum limit for protecting floor coverings. Also, displays current floor temperature.
  • QuickSet feature allows instant setpoint adjustment without entering the SETTING mode
  • Contemporary design
  • Easy installation and setup
  • Selectable display in °F or °C
  • On/Off switch to shut off relay output or shutdown the thermostat at end of heating season for added security
  • EEPROM memory retains control settings in the event of a power failure
  • Lockout mode to prevent tempering by unauthorized personnel
  • Sensor failure and out of range indications
  • One stage heating application
  • Backlit option: Auto (60 sec.)/OFF/ON
  • Supplied with P-01 floor sensor with 10 ft. lead
  • Battery free
  • RoHS(Restriction of Hazardous Substances) compliant means this thermostat is Eco- friendly

SPECIFICATIONS:

  • Display Format: Liquid Crystal Display(LCD) with backlit
  • Power Input : 24VAC ±10%, 50/60Hz, 0.5VA
  • Contact Rating: 2A 24VAC
  • Selectable display in °F or °C
  • Setpoint Range (ambient): 34-100°F(1-38°C). Default setting: 70°F (21°C)
  • Floor Temperature Control Range: 34-122°F(1-50°C) Default setting: 82°F (28°C)
  • Maximum Floor Temperature Limit(AF Mode): 35-122°F(2-50°C) Default: 82°F(28°C)
  • Minimum Floor Temperature Limit(AF Mode): 34-121°F(1-49°C) Default: 40°F(5°C)
  • Temperature Display Range: -22 to 131°F(-30 to 55°C)
  • Switching Differential: A/F/AF Mode: 0.5/1.0/1.5/2°F(°C), Default: 1°F/1°C
  • Sensor Probe: P-01 10kΩ thermistors, 10 ft lead, 3/8"(9.5mm) OD x 13/16"(20.6mm) length
  • Operating Temperature: 32 - 122°F (0 - 50°C)
  • Dimension: 3.62"W x 2.99"H x 0.91"D(92 x 76 x 23mm)
  • Weight: 0.32 lb. (145 g)
  • Storage: -4 to 120°F (-20 to 50°C)
  • Material: Flame retardant plastic

D-28F: HYDRONIC RADIANT FLOOR HEATING THERMOSTAT (BATTERY OPERATED)

Please click to view PDF Brochure              Please click to view PDF Instruction

D-28F digital thermostat is specifically designed for Radiant Floor Heating Systems. It is so flexible that it can be used to control either air temperature (A Mode) or floor temperature (F Mode) or a combination of air temperature with floor temperature limits(AF Mode). An auxiliary remote sensor is provided to measure slab temperature in order to control the floor temperature within desired maximum and minimum limits in hydronic radiant floor heating system.

FEATURES:

  • Large LCD display
  • Dual sensor control modes:
    Mode A: Room sensor for Heating/Cooling.
    Mode F: Floor sensor with maximum and minimum limits
    Mode AF: Room sensor and Floor sensor combined to control the ambient temperature and maintains the floor temperature within the desired  maximum limit
  • Battery operated
  • Large LCD display
  • Freeze protection
  • No Leveling Required
  • Contains NO Mercury, environmentally safe
  • Two wire type thermostat
  • Selectable display in °F or °C
  • EEPROM for setting backup
  • ON/OFF switch to shut off relay output
  • Supplied with 10ft. floor sensor
  • Easy Comfort or Economy Setpoint Selection buttons

SPECIFICATIONS:

  • Display Format: Liquid Crystal Display(LCD)
  • Operate power : Battery 1.5 VDC AA x 2 with Battery-Low indicator & protection
  • Selectable display in °F or °C
  • Temperature control range: Room: 40-95°F(5-35°C)
  • Floor Temperature Control Range: 40-113°F(5-45°C)
  • Temperature Display Range: 14-122°F(-10-50°C) with accuracy ± 0.2°F(0.1°C). Note: No decimal indicator above 100°F
  • Maximum Floor Temperature Limit.(F & AF Mode): 68-113°F(20-45°C) Default: 85°F(29°C)
  • Minimum Floor Temperature Limit(F Mode only):
  • 40-68°F(5-20°C) Default: 59°F(15°C)
  • Note: In AF Mode, only Maximum Limit is available
  • Contact Rating: 10A
  • Floor limits switching differential: 4°F(2°C). Factory Preset (not user adjustable).
  • Freeze protection: factory preset. In effect when thermostat is OFF by Power Button.
  • A & AF Mode 40°F(5°C). F Mode: 50°F(10°C)
  • Shortest cycle rate protection: 3 minutes (time of delay start), effects in cool-mode only
  • Switching Differential: A/AF Mode: 0.4/0.8/1.2/1.6/2°F, 0.2/0.4/0.6/0.8/1°C Default: 0.8°F/0.4°C. F Mode: 1.2/2/4/6°F, 0.6/1/2/3°C Default: 2°F/1°C
  • Dimension: 125W x 90Hx 35D mm
  • Material: Non flammable plastic

D-26FS: HYDRONIC RADIANT FLOOR HEATING THERMOSTAT

Please click to view PDF Brochure                     D-26FS Instructions

                                                                        

D-26F digital thermostat is specifically designed for Hydronic Radiant Floor Heating Systems. It is very simple to install and operate without any programming steps. A 10 ft. auxiliary remote sensor is provided to measure and control the slab temperature. In addition, an ON/OFF switch can be used to turn off the relay output. Setpoint and floor temperature or room temperature is displayed on the LCD screen with backlit.

FEATURES:

  • Large LCD with backlighting for displaying Setpoint & Floor Temperature or Room Temperature
  • Slab Temperature Control for Radiant Floor Heating Systems
  • Low Voltage (24 VAC) System
  • Reliable Digital Electronic Accuracy
  • No Leveling Required
  • Contains NO Mercury, environmentally safe
  • Only 2 wires needed to power thermostat, no need to change battery in the future
  • Selectable display in °F or °C
  • EEPROM for setting backup
  • ON/OFF switch to shut off relay output
  • Built-in Digital Control System
  • Supplied with 10ft. floor sensor

SPECIFICATIONS:

  • Display Format: Liquid Crystal Display(LCD) with Backlighting
  • Floor Temperature Control Range: 41-113°F(5-45°C)
  • Temperature Display Range: 32-140°F(0-60°C)
  • Contact Rating: 16A
  • Power Supply: 24 Vac, 50-60Hz
  • Sampling Rate: 1 Minute
  • Accuracy: ±1°F
  • Switching Differential: 0.5/1.0/1.5/2.0 °F/°C
  • Dimension: 91.5 x 80.3 x 30 mm
  • Resolution: 0.1°F

     PROGRAMMABLE DIGITAL THERMOSTATS:    D-500: FOR HEATING AND COOLING    D502F: FOR HYDRONIC RADIANT FLOOR HEATING    

D-500/D502F

Please click to view PDF Brochure                 Please click to view PDF Brochure

Azel Technologies introduces 500 series electronic programmable thermostat that utilizes the lastest digital technologies for residential and light commercial systems. D-500 is designed for 24 Vac single-stage heating and cooling systems. D-502F is designed to control the floor temperature in Hydronic Radiant Floor Heating Systems.
The 500 series can accurately control the temperature within one degree. Reliable permanent memory retains the programmed settings in the event of a power failure. In addition, the large, easy to read LCD display with backlit makes the thermostat easy to operate and simple to program.
The 500 series programmable thermostat delivers maximum comfort and energy savings by automatically changing to the preset temperature for various times of the day The energy use and costs can be reduced according to the program heat and cool times as much as 33%. This programmable thermostat is better for the environment, since using less energy helps reduce greenhouse gas emissions associated with energy production.

The Azel digital thermostat with its appealing design will allow you to replace inaccurate, old fashioned thermostats with the new accurate and easy to read 500 series.

All Azel thermostats are backed by reputation for quality and reliability.

FEATURES:

  • Large temperature display screen with backlit for quick easy readability
  • Reliable Digital Electronic Accuracy
  • Attractive styling complements any decor
  • Separate schedules for weekdays and weekends (5-2 day programming) or 7 day by factory preset
  • 6/4 Program period(ON/OFF period) per day by factory preset
  • Preprogrammed with a typical energy saving set-up
  • Vacation hold
  • Temporary bypass unit next program
  • Comfort override by holding the new setting for required hours
  • Permanent hold of new temperature setting without programming
  • EEPROM Battery-free Memory backup means no re-programming your schedule after power outage
  • Purge: Fan 90 seconds delay-off for use of residue energy in pipe
  • Display in °F or °C for added model flexibility
  • Selectable 12H/24H Format
  • Optional remote sensor for distant temperature sensing and control
  • Auto-Change-Over between Heat and Cool modes
  • Copy function for programs setting
  • Remote ON/OFF control for commercial building
  • Contains NO Mercury
  • No Leveling Required
  • Only 2 wires needed to power thermostat, no need to change battery in the future
  • Ease-of-use means fewer homeowner questions and increased homeowner satisfaction
  • Easy installation, setup and system checkout saves time and increases installer productivity
  • Save energy cost up to 33%
  • D-502F is supplied with remote sensor probe for floor temperature control

SPECIFICATIONS:

D-500

  • Display Format: Liquid Crystal Display(LCD) with backlit
  • Contact Rating: 7.5A
  • System: Cool-Off-Heat-Auto (changeover)
  • Fan Control: On/Auto
  • Temperature Display Range: 32-122°F(0-50°C)
  • Temperature Control Range: Heat: 41°F to 95°F(5°C to 35°C) & Cool: 43°F to 97°F(6°C to 36°C)
  • Remote control Cut-off of Heat/Cool/Fan output
  • Accuracy: ±1°F
  • Power Supply: 24 Vac, 50-60Hz
  • Switching Differential: 1-2°F(0.5-1.0°C)
  • Dimension: 138x 110 x 32 mm

D-502F: Hydronic Radiant Floor Heating Thermostat (Floor Sensing Thermostat)

  • Display Format: Liquid Crystal Display(LCD) with backlit
  • Floor Temperature Control Range: 41-113°F(5-45°C)
  • Temperature Display Range: 32-140°F(0-60°C)
  • Contact Rating: 16A
  • Control Floor Temperature in Radiant Floor Heating System
  • Accuracy: ±1°F
  • Power Supply: 24 Vac, 50-60Hz
  • Switching Differential: 1-2°F(0.5-1.0°C)
  • Dimension: 138x 110 x 32 mm
 

     DST-932PR SOLAR DIFFERENTIAL CONTROL     

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The DST-932 differential temperature controller is designed for the Solar Heating Systems. The DST-932 switches on a pump in order to transfer heat from solar collector to a storage tank. The controller reads the temperatures of the storage tank (T1) and of the collector (T2), when this differential temperature (T2-T1) is higher than a set value (dt), it will switch on the pump. It is possible to limit the maximum temperature of the storage tank and also activate a freeze protection function. By switching to manual mode it allows the test of the heating system by turning the pump ON or OFF. A universal sensor P-01 or P-02(higher temperature range) is supplied with the control. This solid state temperature sensor probe can be extended up to 500 feet.

DST-932 is designed to handle most differential temperature control functions for operation of solar heating, swimming pool heating, domestic water heating, and sophisticated space heating and cooling etc.

FEATURES:

  • Reliable Digital Electronic Accuracy
  • LED indicates output relay status
  • Easy-to-Read Digital Display which displays sensor and functional status. It also allows precise differential temperature settings
  • Simple programming of differential setpoint temperature and (hysteresis) differential. Setpoint can be adjusted easily without going into programming mode.
  • A tighter differential can be achieved (eg. 1F or 1C) than conventional electromechanical controls
  • Anti-Freeze protection
  • Over Heat Protection
  • Anti-Short Cycle Delay to ensure the output relay remains off for up to 254 secs. This would avoid unnecessary hard start and equipment wear
  •  User selectable Celsius or Fahrenheit scales
  • Lockout switch to prevent tempering by unauthorized personnel
  • Two universal sensors P-01/P-02 are supplied with the control. This solid state temperature sensor probe can be extended up to 500 feet.
    Easy installation

SPECIFICATIONS:

  • DISPLAY: 3 digit, 13.2 mm, high intensity green
  • INPUTS: two NTC sensors or two PTC sensors
  • MEASURING RANGE: -55 … +302 °F for PTC probe
                                       -39 … +248 °F for NTC probe
  • ACCURACY AT 25°C: ±1 °F + 1 digit
  • RESOLUTION: 0.2 or 2 °F
  • OUTPUTS: 1 spdt 250Vac 16A max resistive (1hp)
  • POWER SUPPLY: 115 Vac ±10% 50/60Hz
  • Differential Setpoint range: 0.8 to 50°F
  • Differential Setpoint Hysteresis(differential): 0.8 to 17.9°F
  • Anti-Cycling Delay: 0 to 254 sec.
  • Anti-Freeze protection: 0.3 to 50.0°F
  • Anti-Freeze hysteresis(differential): 0.8 to 17.9°F
  • Over Heat Protection: 32.1 to 228°F
  • Over Heat Hysteresis(differential): 0.8 to 17.9°F
  • Output: 1 on a SPDT 16 A 250 Vac relay
  • Resolution: 1°C (1°F)
  • Accuracy: ± 1°F
  • Display: LED, 3 digits, 12.5 mm high
  • Data storing: on EEPROM non-volatile memory
  • Operating temperature: 23 to 149 °F (-5 to +65 °C)
  • Relative humidity: 20 to 85 % (not condensing)
  • Housing: self-extinguish UL94V0 ABS plastics, white colour
  • Size: frontal 45 x 71 mm; depth 58 mm (4 DIN modules)
  • Mounting: DIN rail for panel boards
  • Power supply: 110VAC, 50/60Hz



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