This High altitude control unit is suitable for air heaters AUTOTERM Air 4D (previously known as PLANAR 44D) with a specific serial number.
Heater equipped with this control unit can work at altitude up to 2500 meters above sea level (MASL).
Interchangeable control units.
| Heater
|
serial number
|
control unit
|
Glow plug
|
HA control unit
|
HA Glow plug
|
| 44D12
|
4142….
|
Assy.4144
|
Assy.3333
|
Assy.4002
|
Assy.3333
|
| 44D24
|
4137….
|
Assy.4139
|
Assy.3333
|
Assy.4188
|
Assy.3333
|
| 44D12
|
3046….
|
Assy.3048
|
Assy.2288
|
Assy.4002
|
Assy.3333
|
| 44D24
|
3031….
|
Assy.3033
|
Assy.2253
|
Assy.4188
|
Assy.3333
|
In order to change the control unit for 44D with control units assy.3048 and assy.3033, you have to change the Glow plug as well.