2427A
Temperature control unit
Description
2427A automatic air-temperature control unit
2427A is an electronic control unit for the ART-56-2 automatic air-temperature regulator. It receives signals from the temperature-sensing circuit, amplifies them and sends pulsed commands to the final mechanisms. Manufacturer catalogue information describes semiconductor devices and electromagnetic relays in the design. The unit should be ordered by the full 2427A marking because the suffix distinguishes it from the base 2427 used in ART-56-1.
Full descriptionCollapse description
ART-56-2 system composition and operation
For the Tupolev Tu-154, each ART-56-2 set comprises a 2427A control unit, a 2400 temperature setter, two series-connected 2182A temperature sensors and a ground-test connector. The MPK-1 mechanism of distributor 514 acts as the final control element. Three systems regulate the crew compartment and two passenger cabins, which form one connected air volume and can influence one another.
Documented regulation values
The ART-56-2 system regulates compartment temperature from 18 to 24 °C. The stated regulation accuracy is ±2 °C and the actuator operating interval matches the ART-56-1 value of 1–1.5 seconds. The documented pause for ART-56-2 is 45 ±5 seconds. These are system values for the documented Tu-154 installation; they should not be presented as universal ratings for every 2427A application without checking its passport.
Identification and ordering
Confirm the 2427A or Cyrillic 2427А data-plate marking, connectors, passport and ART-56-2 installation before supply. The recorded assigned service information is 7 years or 4,000 flight hours, but the status of an individual unit depends on its manufacture, storage and operating records. Related items in the Electronic Control Units catalogue aid system navigation and do not establish interchangeability.
Technical details
- Product Type
- Automatic air-temperature regulator control unit
- System
- ART-56-2
- Function
- Amplification of temperature signals and pulsed actuator control
- Construction
- Semiconductor devices and electromagnetic relays
- Documented Aircraft
- Tupolev Tu-154
All specificationsCollapse specifications
- Controlled Areas
- Crew compartment and passenger cabins
- ART-56-2 Set
- 2427A unit, 2400 setter, two series-connected 2182A sensors and ground-test connector
- Actuator
- MPK-1 mechanism of distributor 514
- Temperature Regulation Range
- 18–24 °C
- Regulation Accuracy
- ±2 °C
- Actuator Command Duration
- 1–1.5 s
- Pause Duration
- 45 ±5 s
- Assigned Service Information
- 7 years or 4,000 flight hours; confirm for the individual unit
- Alternative Designations
- 2427A; 2427-A; 2427А; ART-56-2 control unit
- Technical Documentation
- Product passport and Tu-154 ART-56-2 documentation
Payment & delivery
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Payment & delivery terms