Function：Setting temperature,

 LCD display show current temperature,

Hysteresis ON calibration,

 Hysteresis OFF calibration,

Room temperature calibration.

Feature: ABS fireproof material,

Opening housing easily with small button,

 Hysteresis ON calibration,

Hysteresis OFF calibration,

parameter：2A  30VDC,0.5A  125VAC，power: 2*1.5AA

Designed for: wall hung boiler

Connection diagram: connecting to boiler directly