TM-9-2540-207-14-P

HEATER, VEHICULAR COMPARTMENT, MODEL: A20

TECHNICAL MANUAL; OPERATOR, FIELD, AND SUSTAINMENT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST

JULY 2007

TM-9-2540-207-14-P - Page 184 of 288

TM 9-2540-207-14&P

6-20

6.5.26 E3- LOW BURNER AIRFLOW (Design Iteration 3 Only)

HEATER DID NOT REACH MODE 04 WITHIN 3MINUTES 30 SECONDS; LOW BURNER

AIRFLOW – ON IGNITION TIME OUT OR

– LOW BURNER AIR FLOW IN STAGE 04 OR –

DURING RUN MODE

NOTE: IF ANY BURNER COMPONENTS ARE NEW, START-UP MAY REQUIRE 3 ATTEMPTS.

CHECK/POSSIBLE CAUSE

REF

.R

EPAIR

1

CHECK FOR OBSTRUCTIONS IN

COMBUSTION INLET OR EXHAUST

DUCTING

CHECK THAT EXHAUST IS SET-UP

TO MIL-PRF 62250D

REMOVE OBSTRUCTIONS

RESTART HEATER

2

CHECK FOR KINKING/BLOCKAGE

OF INLET DUCTING TO HEATER

REPLACE DEFECTIVE INLET DUCTING AND

REMOVE ALL UNNECESSARY BENDS

RESTART HEATER

3

IF AMBIENT TEMPERATURE IS

BELOW 32

°

F (0

°

C), CHECK FOR

FROST OBSTRUCTING HEATER

DUCTING

REMOVE FROST FROM AIR INLET

RESTART HEATER

4

AIR IN FUEL LINES.

PURGE HEATER AND BLEED FUEL LINES.

5

CHECK FOR CARBON

ACCUMULATION INSIDE BURNER

5.3.7

5.4.1

CLEAN BURNER HOUSING

CLEAN HEAT EXCHANGER

RESTART HEATER

CHECK CONDITION OF FLAME

TUBE AND BURNER CHAMBER

5.3.2

5.3.5

IF EITHER ONE IS DISTORTED, REPLACE FLAME

TUBE AND BURNER CHAMBER

RESTART HEATER

6

CHECK FOR WARPED BURNER

FAN PLATE; GAP BETWEEN

GASKET AND CASTING

5.5.4

REPLACE BURNER FAN PLATE

RESTART HEATER

7

DEFECTIVE BURNER FAN MOTOR

5.6.5

REPLACE BURNER FAN MOTOR

RESTART HEATER

8

DEFECTIVE BURNER FAN

IMPELLER

5.6.4

REPLACE BURNER FAN IMPELLER

RESTART HEATER

9

DEFECTIVE POWER BOARD

REPLACE POWER BOARD

RESTART HEATER

NOTE: OBSTRUCTIONS TO LOOK FOR IN COMBUSTION OR EXHAUST DUCTING INCLUDE: ICE, FROST,

DUST, MUD, WATER, FOREIGN OBJECTS, SOOT, RODENTS, SMALL BIRDS, ETC.