Aircraft type should be considered when choosing the aircraft heater system parts. Different types of heater systems include, fuel fired heaters, exhaust heating systems, combustion heater systems, and bleed air heating systems.
Fuel Fired Heaters
Often small and portable, fuel fired heaters feature combustion chambers where the fuel-air mixture and ignited using an ignition device. The oxygen is provided by a fan attached to the heater system. Because fuel fired heaters are often portable, fuel is piped into the heater system via an external fuel tank or it can be linked up to the aircraft’s fuel system. Warm air is ducted to the cabin using connecting tubing. Maintaining a fuel fired heater is key. By products of the combustion process such as soot, carbon monoxide, and sulfur dioxide are harmful to humans. Routine checks and maintenance must be carried out to ensure that there are no external leakages. The ignition device and tubing are components that should be replaced after a specific amount of time and use. Running fuel fired heaters requires an electrical power source. 12-volt and 24-volt aircraft electrical systems can accommodate a fuel-fired heater.
Exhaust Heating Systems
The exhaust gas created during the engine combustion process is an efficient means of heating the interior of an aircraft. Though exhaust gas is routed out of the engine and into the atmosphere, some of the gas is redirected to the cabin. Interior climate control and the defrosting mechanisms of an aircraft are fueled by exhaust heating systems. Light aircraft often use this heater system as it is the simplest heater system in design and function. Regardless of the aircraft type however, this particular heater system requires strict maintenance to ensure there are no gas leakages. Technicians should have a maintenance schedule that addresses any fire safety concerns.
Combustion Heater Systems
Small aircraft usually use fuel fired heaters whereas larger aircraft use combustion heater systems. Aircraft fuel is ignited in a large combustion chamber, which is surrounded by an outer stainless-steel casing. A unique function of combustion heater systems is the level of control. A control switch either turns on or off the heater system, depending on the aircraft heat requirement. Air is forced over the combustion chamber and picks up heat. Ducts then funnel the air into the cabin for heating purposes. The safety problems associated with carbon monoxide are considerably lower in a combustion heater system. Because the ventilation air on the outside of the combustion chamber is of higher pressure than the inside of the chamber, any leaking carbon monoxide would likely be carried out by the exhaust system. Once more, combustion heaters have an additional safety feature in the form of an overheat switch. In the case that the engine overheats, the system will shut off the fuel supply.
Bleed Air Heating Systems
In this aircraft heater system, air needs to be cooled rather than heated up. Turbine-engine aircraft use this system to make use of the extremely hot air that has been pushed through the compressor. Hot air is mixed with recirculated air in order to cool it. Once the air has reached the correct temperature, it is ducted into the cabin. Due to the nature of the system, there are many safety checks to ensure the compressed, hot air does not enter the cabin.
Part No | Description | QTY | RFQ |
---|---|---|---|
CD21252 | cd21252 temperature switch | Avl | RFQ |
RA-07D29 | overheat switch - manual reset | Avl | RFQ |
CD70219 | water manometer holder | Avl | RFQ |
CD20654B | cd20654b rotary switch, heater control | Avl | RFQ |
CD21505 | cd21505 terminal block | Avl | RFQ |
RA-720963 | sponge, silicone gasket | Avl | RFQ |
RA-45A28 | washer | Avl | RFQ |
RA-14D29 | ra-14d29 gasket, overheat switch | Avl | RFQ |
CD21412 | single row ball bearings, package of two | Avl | RFQ |
CD21197 | cd21197 fuel pump, universal | Avl | RFQ |
CD70082 | gauge | Avl | RFQ |
CD21442 | switch overheat manual reset, 225 degree | Avl | RFQ |
CD21193 | cd21193 valve, solenoid 24 vdc normally closed | Avl | RFQ |
RA-41427 | switch, overheat kit | Avl | RFQ |
RA-720012 | washer | Avl | RFQ |
CD20800 | regulator, fuel shutoff | Avl | RFQ |
CD21296 | cd21296 fuel nozzle assembly | Avl | RFQ |
RA-735111 | gasket, fuel pump | Avl | RFQ |
CD21381 | cd21381 ignition unit | Avl | RFQ |
285CAL | pdt calibration | Avl | RFQ |
CD21156 | cd21156 fuel nozzle 2.30 gph | Avl | RFQ |
RA-21425 | switch, overheat auto reset prevents overheating by shutting down at 175 degrees | Avl | RFQ |
CD40690 | kit airflow/ switch assembly cd40690 | Avl | RFQ |
RA-711222 | pass through, fuel gasket | Avl | RFQ |
CD21155 | cd21155 fuel nozzle 2.08 gph | Avl | RFQ |
CD70081 | pdt regulator | Avl | RFQ |
RA-21452-3 | set of 2 carbon brushes- .25" x .25" make up ra-21452-3 brush kit | Avl | RFQ |
CD21194 | cd21194 valve, solenoid | Avl | RFQ |
CD21417 | exhaust shroud gasket | Avl | RFQ |
CD20803 | fuel regulator, 24 vdc 1.0 amp | Avl | RFQ |
RA-17D86 | gasket | Avl | RFQ |
CD70146 | coupler insert | Avl | RFQ |
CD21171 | cd21171 fuel nozzle, 2.25 gph | Avl | RFQ |
CD70017 | supply assembly 1-1/2" | Avl | RFQ |
CD30500 | fan, 4 blade mini | Avl | RFQ |
722132 | blower assembly, comb. overhaul | Avl | RFQ |
RA-719842 | lead ignition | Avl | RFQ |
CD70089 | gauge | Avl | RFQ |
CD70100 | self-contained c&d associates pressure decay tester | Avl | RFQ |
CD21163 | cd21163 fuel nozzle, 1.35 gph | Avl | RFQ |
CD20801 | 24vdc regulator | Avl | RFQ |
RA-21175 | ra-21175 aircraft heater replacement part, fuel nozzle | Avl | RFQ |
RA-735411 | seal with connector and couplings | Avl | RFQ |
CD21166 | cd21166 fuel nozzle, 3.00 gph | Avl | RFQ |
RA-21455 | spring | Avl | RFQ |
CD70015 | supply assembly - 3/4" replaces p201.57 | Avl | RFQ |
CD41210 | number plate cd41210 | Avl | RFQ |
CD93C31 | cd93c31 ignition coil 24 vdc system | Avl | RFQ |
CD21387 | cd21387 ignition mount | Avl | RFQ |
CD29112 | fuel pump assy. 12 vdc | Avl | RFQ |
CD09D77 | cd09d77 nozzle holder gasket | Avl | RFQ |
CD21501 | number plate | Avl | RFQ |
CD21164 | cd21164 fuel nozzle, 1.0 gph | Avl | RFQ |
CD21168 | cd21168 fuel nozzle, 1.20 gph | Avl | RFQ |
CD22070 | cd22070 spark plug | Avl | RFQ |
RA-476229 | ra-476229 gasket, washer | Avl | RFQ |
RA-41401 | fuel, drive pump double shaft 24 vdc | Avl | RFQ |
RA-735059 | gasket, o-ring | Avl | RFQ |
CD21380 | cd21380 ignition unit 12vdc | Avl | RFQ |
CD21185A | universal fuel pump, 7.0 psi, 1.25 amp, 12-vdc pass-through | Avl | RFQ |
CD21520 | mount, isolation | Avl | RFQ |
RA-41426 | switch, kit | Avl | RFQ |
CD70116 | pdt tubing | Avl | RFQ |
CD21190 | cd21190 pump/ motor universal. | Avl | RFQ |
RA-41411 | bumper, isolation | Avl | RFQ |
CD70104 | gauge high pressure | Avl | RFQ |
CD31073 | electrode is faa approved to directly replace janitrol 51a05 | Avl | RFQ |
RA-720965 | exhaust shroud gasket silicone sponge | Avl | RFQ |
753803 | dynamic motor 24 vdc overhaul | Avl | RFQ |
CD70121 | lamp | Avl | RFQ |
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