User Manual for GIRA 2473 00 RTC 24 V Room Temperature Controller

Quick Guide

The GIRA 2473 00 is an electronic room temperature controller designed for 24 V AC systems. It features manual temperature setting, ECO mode for energy saving, cooling mode, and frost protection. Installation must be performed by an electrically skilled person. The device supports both pulse width modulation (PWM) and two-point control methods.

Safety Instructions

• Installation and connection must be performed by electrically skilled persons only.
• Risk of electric shock: Comply with regulations and standards for SELV circuits during installation and cable routing.
• The temperature sensor must not be painted over or become dirty during renovation work.

Device Components

The device consists of the following main parts:

• Room temperature controller insert
• Cover frame
• Status LED
• Central plate
• Control knob
• Internal temperature sensor
• Adjustment rings for temperature limit

Intended Use

• Control of electrothermal valve drives for AC 24 V.
• Regulation of room temperature in closed rooms.
• Mounting in appliance boxes according to DIN 49073.

Functional Description

Lowering mode (ECO): By connecting the input terminal to 24 V (controlled by a central clock), the temperature is reduced by 4 °C.

Cooling mode: Can be activated via the control knob or by wiring the input terminal C with 24 V.

Temperature drop detection: If a sharp temperature drop is detected (e.g., open window), the system regulates to 5 °C for up to 30 minutes.

Offset: Allows adjustment of the control knob position to match the actual room temperature (up to +/- 3 °C).

Operation

Changing room temperature: Turn the control knob to the right or left. The LED lights up for up to 2 minutes in the color of the current mode (Red=Heating, Blue=Cooling, Orange=Frost protection).

Switching off: Press the control knob for longer than 2 seconds until the LED lights up orange. The device switches to frost protection mode.

Manual switching between heating and cooling: Press the control knob for longer than 4 seconds until the LED flashes. Briefly press again to change the mode, then press for longer than one second to save.

Installation

Selecting location: Recommended height is 1.50 m on interior walls. Avoid mounting near heat sources (ovens, direct sunlight), draughts, or behind curtains/shelf walls.

Connecting: Connect the electrothermal valve drive to the insert. Optionally connect the lowering mode input or cooling input. Ensure terminals are at the bottom when fitting into the appliance box.

Commissioning

Setting control mode and valve type: Default is PWM control and NC valve type. To change, press the control knob for longer than 20 seconds. The LED flashes green for PWM or green/blue for 2-point control. Briefly press to change, press longer than one second to save.

Setting temperature limits: Pull off the control knob to access the adjustment rings. Use the blue ring for minimum temperature and the red ring for maximum temperature.

Technical Data

• Rated voltage: AC 24 V SELV (± 10%)
• Mains frequency: 50 / 60 Hz
• Connected load: Max. 24 W
• Number of valve drives: 1 to 5
• Ambient temperature: -5 to +45 °C
• Controller class: IV