Application
Variants
Functional description
Room temperature controller and VAV terminal unit, including control components, form a functional unit that allows occupants to control the room temperature individually and at the lowest possible energy consumption. It also allows to control the water valves of hot water or cold water systems.
Room temperature control is a closed loop control. The controller is fitted with a temperature sensor that measures the room temperature. The setpoint can be a constant value or it can be changed by room occupants. The controller compares the actual value with the setpoint value and alters the volume flow rate setpoint value and/or the valve settings accordingly.
The room temperature control is P control or PI control.
Maximum energy efficiency is achieved because of demand-based operating modes that can be activated by the room occupant or at a higher level.
Operating modes
Energy-saving mode
The room temperature is such that devices will not suffer, i.e. the setpoint temperature for heating is very low, and the setpoint temperature for cooling is very high, for example in a room with an open window.
Standby mode
The setpoint temperature for heating is just slightly reduced, and the setpoint temperature for cooling is just slightly increased, e.g. for a room that is currently not used.
Frost mode
If the room temperature falls below 10 °C, the anti-freeze function is activated.
Changeover
Changeover from cooling to heating or from heating to cooling.
Boost
Room ventilation with the maximum volume flow rate (Vmax), or maximum heating or cooling.
Room temperature controller CR24-B1
Supply voltage | 24 V AC ± 20 %, 50/60 Hz |
Power rating | 3 VA |
External temperature sensor | NTC, 5 kΩ, 10 – 45 °C |
External setpoint changes | 0 – 10 V DC corresponding to 0 – 10 K |
Output for variable volume flow | 0 – 10 V DC, 5 mA max. |
IEC protection class | III (protective extra-low voltage) |
Protection level | IP 30 |
EC conformity | EMC according to 2004/108/EG |
Dimensions (B × H × T) | 84 × 99 × 32 mm |
Weight | 0.105 kg |
Room temperature controller CR24-B2
Supply voltage | 24 V AC ± 20 %, 50/60 Hz |
Power rating | 3 VA |
External temperature sensor | NTC, 5 kΩ, 10 – 45 °C |
External setpoint changes | 0 – 10 V DC corresponding to 0 – 10 K |
Output for variable volume flow | 0 – 10 V DC, 5 mA max. |
Output for heating valve | 3-point, 24 V AC, max. 0.5 A, 10 VA, optimised for actuators with a running time of approx. 150 s |
IEC protection class | III (protective extra-low voltage) |
Protection level | IP 30 |
EC conformity | EMC according to 2004/108/EG |
Dimensions (B × H × T) | 84 × 99 × 32 mm |
Weight | 0.105 kg |
Room temperature controller CR24-B3
Supply voltage | 24 V AC ± 20 %, 50/60 Hz |
Power rating | 3 VA |
External temperature sensor | NTC, 5 kΩ, 10 – 45 °C |
External setpoint changes | 0 – 10 V DC corresponding to 0 – 10 K |
Output for variable volume flow | 0 – 10 V DC, 5 mA max. |
Output for heating/cooling | 0 – 10 V DC, 5 mA max. |
Output for heating valve | 3-point, 24 V AC, max. 0.5 A, 10 VA, optimised for actuators with a running time of approx. 150 s |
IEC protection class | III (protective extra-low voltage) |
Protection level | IP 30 |
EC conformity | EMC according to 2004/108/EG |
Dimensions (B × H × T) | 84 × 99 × 32 mm |
Weight | 0.105 kg |
Room temperature controller ETN-24-VAV-227-P
Supply voltage | 24 V AC, 50/60 Hz |
Power rating | 1.2 VA |
External temperature sensor | Thermistor 50 kΩ at 45 °C |
Analog outputs for cooling operation, heating operation | 0 – 10 V DC, max. 5 mA |
IEC protection class | III (protective extra-low voltage) |
Protection level | IP 30 |
EC conformity | EMC according to 2004/108/EC |
Dimensions (B × H × T) | 92 × 80 × 22 mm |
Weight | 0.136 kg |
RC/M1
Type | ETN-24-VAV-277V-P |
Application
Parts and characteristics
Commissioning
Application
Parts and characteristics
Commissioning
Application
Parts and characteristics
Commissioning
Application
Parts and characteristics
Commissioning
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Tel.: +39 029829741 | Fax: +39 029829760