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 183 of 288

TM 9-2540-207-14&P

6-19

6.5.25 E3 - LOW BURNER AIR FLOW (Design Iteration 1 & 2 Only)

COMBUSTION AIR FLOW OPERATING LIMITS ARE OUT OF ALLOWABLE RANGE

CHECK/POSSIBLE CAUSE

REF

.R

EPAIR

1

CHECK FOR OBSTRUCTIONS IN

COMBUSTION INLET OR EXHAUST

DUCTING

REMOVE OBSTRUCTIONS

RESTART HEATER

2

CHECK FOR KINKING/BLOCKAGE

OF DUCTING TO HEATER

REPLACE DEFECTIVE 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

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

5

DEFECTIVE BURNER FAN PLATE

5.5.4

REPLACE BURNER FAN PLATE

RESTART HEATER

6

DEFECTIVE ELECTRONIC

PROGRAMMED CONTROLLER

BOARD

5.2.5

REPLACE ELECTRONIC PROGRAMMED

CONTROLLER

RESTART HEATER

7

AIR IN FUEL LINES.

PURGE HEATER AND BLEED FUEL LINES.

8

DEFECTIVE BURNER FAN MOTOR

5.6.5

REPLACE BURNER FAN MOTOR

RESTART HEATER

9

DEFECTIVE BURNER FAN DRIVER

BOARD

5.6.3

REPLACE BURNER FAN DRIVER BOARD

RESTART HEATER

10

DEFECTIVE BURNER FAN

IMPELLER

5.6.4

REPLACE BURNER FAN IMPELLER

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.