TM 10-4520-262-12&P 0028 00
UNIT MAINTENANCE
SPACE HEATER, CONVECTIVE
(NSN 4520-01-431-8927)
0028 00-1
COMBUSTION AIR BLOWER DUCT ASSEMBLY
REPLACE
INITIAL SETUP
Tools
Materials/Parts
Tool Kit, General Mechanics (Item 1, WP 0044 00)
Personnel Required
Equipment Condition
One
Heater shut down and all advisory lights off. (WP
0006 00)
In-tent controller cable assembly disconnected
from heater. (WP 0006 00)
Fuel source disconnected. (WP 0006 00)
Battery disconnected. (WP 0006 00)
Upper housing assembly removed (WP 0030 00)
WARNING
The ignition system of this heater contains dangerous voltages which can cause severe
electrical shock. Be sure to disconnect power before any maintenance actions.
REPLACE
1. Disconnect the combustion air blower duct assembly (1) from the burner assembly (2) by first
loosening the hose clamp (3) and sliding it onto the hose (1).
2. Pull the end of the duct (1) from the burner assembly (2).
3. Disconnect the end of the combustion air blower duct assembly (1) connected to the combustion
air blower assembly outlet (4) by loosening the hose clamp (5) and sliding it onto the hose (1).
4. Remove the combustion air blower duct assembly (1) from the heater. Be sure to remove the
rubber spacer sleeve located inside the end of the duct assembly and reinstall it onto the
combustion air blower assembly outlet (4).
5. To install the combustion air blower assembly hose (1), connect the combustion air blower duct
assembly to the burner assembly (2) by sliding it onto the hose inlet on the burner assembly (2).
Tighten the hose clamp (3).
6. Slide the end of the combustion air blower duct assembly onto the combustion air blower
assembly outlet (4). Slide the hose clamp (5) into position and tighten.
