2 - LM2500 GTE Base and Enclosure Assembly

Question 1

LM2500 Module/Base Enclosure Assembly

Answer 1

Provides a controlled operating environment for the GTM

Also provides thermal and acoustic protection

Question 2

Thermal and acoustic protection

Answer 2

Provided by:
3/8” thick steel outer walls
4” of fiberglass insulation
Perforated metal wall; 2000 F for 15 min

Question 3

Fire Detection within the module

Answer 3

3 UV flame detectors
Flame detector signal conditioner
2 temperature switches

Question 4

Fire Extinguishing methods

Answer 4

Two 95-lb Halon bottles
Two CO2 actuation bottles-30sec time delay
Directional control valve
Two discharge nozzles in the GTM

Question 5

Externally-mounted cooling fan

Answer 5

Forces air down through the vent damper, around the engine, and out through the exhaust eductor
Cooling fan starts automatically after engine start and secures 10 min after engine shutdown

Question 6

Vent Damper

Answer 6

Pneumatically opened via a solenoid during start sequence
Upon loss of Low Pressure control air, the damper fails in its open position
Can be cycled manually in an emergency

Question 7

Enclosure heater

Answer 7

Keeps GTM warm enough to prevent waxing of the fuel and ensures proper fuel viscosity
Heater elements turns on at 60F-70F; turns off at 85F-95F
Fan energizes between 120F-130F; de-energizes at 145F

Question 8

Ice Detector

Answer 8

Located inside the inlet plenum
Alarms sound when Relative Humidity increases to 70% or more, or temp. decreases to 41F or less