Digital thermostat W1209 12V red display + probe relay 1750W

• Supply voltage: 12V.
• Temperature control: from -50℃ to 110℃.
• Display resolution: from -9.9℃ to 99.9℃ - 0.1℃, remaining range - 1℃.
• Output load: max 1750W, 20A/14VDC, 7A/250VAC.
• Display colour red.
  
• Waterproof probe (4mm): NTC10k Ohm measurement, length approx. 50cm.
• Control circuit "no name" has no effect on the operation of the module.
  
• Dimensions: 41x49x18mm.
• Weight with probe 19.2g.
  

Description of functions:

• P0 - Mode selection: C - Cooling / H - Heating
• P1 - Hysteresis range: Range: 0.1 - 15°C
• P2 - Upper temperature detection limit: Range: -25°C to 110°C (Not used to set the relay switching temperature)
• P3 - Lower temperature detection limit: Range -30°C to 105°C (Not used to set relay off temperature)
• P4 - Thermometer calibration: Range: -7°C to 7°C (Useful during display errors and significant probe cable extension)
• P5 - Relay switch-on delay time: Range: 0min to 10min
• P6 - Over temperature alarm: Range: 0 - 110°C

Factory settings reset : Simultaneously hold down the + and - buttons when the module's supply voltage is switched on.

Operating instructions:

• The thermostat can operate in Heating (H) or Cooling (C) mode.
• Connecting the 12V DC power supply will switch on the module; the red display indicates the current probe temperature.
• On first start-up, the thermostat is programmed to factory settings: relay on above 30℃, relay off below 28℃.
• The module remembers the settings after a power failure.
• An LED next to the screen indicates that the relay is switched on.

Programming:

• Press the SET function button briefly - the screen with the set temperature will blink.
• Use the + and - buttons to set the temperature for the relay status change.
• After setting the temperature, wait about 10 seconds until the screen stops blinking - the temperature has been set and stored.
• Hold down the SET button for 4-5 seconds to enter the P0...P6 function programming mode.
• Use the + and - buttons to select the function (P0...P6), briefly press the SET button -> change the function parameter -> confirm changes by briefly pressing the SET button.
• Change the next function as in the previous point.
• When the function parameters have been changed, hold the SET button for 4 seconds (or do nothing for 10 seconds) to save the settings.

Examples of use:

Heating mode:

• Set the heater switch-on temperature to 23℃.
• Set the hysteresis to 5℃.
• Save the settings.

Cooling mode:

• Set the fridge switch-on temperature to 1℃.
• Set the hysteresis to 5°C.
• Save the settings.

CH pump:

• Set the pump switch-on temperature to 40℃.
• Set the hysteresis to 10°C.
• Save the settings.

Alarm:

• Set the alarm temperature to 80℃.
• Set the hysteresis to 10°C.
• Save the settings.