Chronothermostat; Technical Information - Bticino HD4451 Instalación

Installation
The Chronothermostat can be flush-mounted or wall-mounted using Axolute, Living International, Light and Light Tech boxes, supporting frames and
plates (3 DIN modules).
If it is necessary to lock the Chronothermostat in place (e.g. public places), use the screw supplied at the back of the base.

Chronothermostat

Wall-mounting
box
Supporting
frame
Connections
Max conductor size: 2x 2,5 mm2
Voltageless output contact rate: 5(3)A; 250 Vac
NO C NC
Remote ext.NTC
To loads to be
checked
Remote activation
Closed contact =
Open contact =
Wiring diagrams
System used only for heating with
ON/OFF control
Example:
automatic consent in heater
NO C NC
Remote ext.NTC
The correct use of the probe requires
✱
the application of the sensor on a
surface which gradually reaches the
temperature, not exposed to heat or
solar radiation sources.
External NTC sensor
connection ✱
antifreeze mode
weekly program
(last selected)
System used only for heating with
OPEN/CLOSE control
Example:
motorized valve control – Open (NO)/Close (NC)
Front cover
plate
1,5m

Technical information

• Operating temperature: 5°C ÷ 35°C
• Power source: 2 LR6/AA 1.5V alkaline batteries
• Minimum time between a programmed operation and the next:
15 minutes
• Temperature values that can be set: 3°C ÷ 40°C
(with a 0.1°C minimum interval)
• Accuracy of controlled temperature: ± 0.5°C
• Average battery life: 1 year
• Flush-mounting or wall-mounting installation
• Voltageless output contact rate: 5(3)A; 250 Vac
• Possibility of connecting an external probe for a temperature (item
3457) with the following features: R (25°C) = 10k
BETA = 3435 - max. connection length 10 metres
• Possibility of remote controlling the Chronothermostat (for example, with
a telephone switchboard, telephone actuator, burglar alarm system, etc.)
Caution
Remote operation may cause
damage to people or property.
Flat batteries must be disposed of
respecting the laws in force.
NO C NC
Remote ext.NTC
M
2
RAEE/WEEE: bticino.com/disposal
Heating and cooling system with
ON/OFF control
If you want to control both the heating and cooling
system, set up a two-way switch for selecting
Summer/Winter, as shown in the picture.
When the season changes, set the two-way switch
to the required position and switch over to Summer/
Winter on the Chronothermostat.
NO C NC
Remote ext.NTC