2-212
TM 3-4230-209-20&P
2-40. LOW PRESSURE HEATING BOILER ASSEM BLY (CONT).
LOCATION/lTEM
ACTION
REMARKS
Low Pressure Heating Boiler
Assembly/
Pressure switch (6)
Screw pressure switch (6) in side of combustor so electrical wires
enter through the bottom. Connect electrical wiring. Reinstall cover
panel if necessary.
Gas spark igniter (7)
Screw gas spark igniter (7) into nozzle holder assembly (8) and
Nozzle holder assembly (8)
combustor plate (9) unit. If unit was removed, slide it into position in the
Combustor plate (9)
combustor.
Ignition cable assembly (10)
Connect ignition cable assembly (10) to gas
spark igniter (7) and tighten connector.
Nozzle valve line (11)
Insert nozzle valve line (11) and combustion
Combustion return line (12)
return line (12) through nonmetallic
Nonmetallic grommet (13)
grommets (13 and 14) and connect to the
Nonmetallic grommet (14)
combustor plate.
WARNING
When handling asbestos material,
always wear an air filtering respirator,
gloves, and goggles. Wash face and
hands with soap and water before eat-
ing or smoking. Asbestos can cause
cancer if handled without protection.
Gasket (15)
Position gasket (15) and cover plate (16) on
Cover plate (16)
combustor opening and install eight hexagon
Hexagon cap screws (17)
cap screws (17).
Internal tooth lock
Install eight internal tooth lock washers (18)
washers (18)
and hexagon plain nuts (19), and secure.
Hexagon plain nuts (19)
