gas boiler heating thermostat

Display
Large, 4.3-inch touchscreen display;
Blue, lighted display for easier low-light viewing;
Larger, easy-to-read character size;
Extra-large touch keys for easy operation;
Clean, uncluttered touchscreen display provides
easier navigation.

Comfort & Convenience
Intuitive menu-driven set-up, programming and operation,
with audio prompt to confirm touchscreen entries;
Permanent program retention during power loss;
Setpoint temperature "limited range" capable;
Enhanced touchscreen security prevents tampering.
Room temperature display can be recalibrated up to +/- 4°C;
Temperature display resolution: 0.1 C;
Temporary temperature override;
C / F temperature format selection by buttons;
Vacation mode(frost protection mode)
24hr/12hr clock format selection
Switching differential setting
Available in white and silver plastic finishes

Specifications

*    Power supply: 230VAC
*    Inputs: 1x NTC10K  temperature sensor
*    Output: 1 x dry contact relay(R1),max 3A
*    Ambient temperature: 0 °C [+32 °F] ~ +45 °C [+113 °F]
*    Operating RH: 0~95% (non condensing). 
*    Backlight life: 5,000 hours.
*    Battery type: CR 1220 (Backs up clock only)
*    Battery life: > 5years (10 years Maximum)