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A3253 thermostat provides temperature control in industrial , commercial and residentcial application, especially for gas, oil, electric boiler and wall-hung boiler etc.
The A3253 Programmable Thermostat is designed for heating operation purpose with 7-Day, 4-periodes programming thermostat that provides universal system compatibility, precis comfort control to meet energy saving requirements. 

• Features

  ◆ Large LCD display
  ◆ 7days 4 periods or 5+2 programmable
  ◆ Error alarm
  ◆ low voltage alarm
  ◆ system setting mode selectable
  ◆ Green backlight
  ◆ 12/24 hours clock selectable
  ◆ manual override

  ◆ batteries power supply
  ◆ Temperature accuracy selectable

• Specifications

  ◆Temperature display range
  ◆Temperature setting range
  ◆Temperature accuracy
  ◆Supply Voltage
  ◆Sensor
  ◆Wiring 
  ◆Enclosure
  ◆Key
  ◆Load voltage                                      

  0°C-37°C (32°F-99°F)
  7°C-35°C (45°F-95°F)
  ± 0.5°C (± 1°F)
  2 AA alkaline batteries
  NTC 1% B=3950
  terminal block
  ABS
  Silicone Rubber
  AC220（5A）
   

• Wiring Diagram