Section IV. REMOVAL AND INSTALLATION OF
MAJOR COMPONENTS AND ASSEMBLIES
5-15. Outlet Coil Assembly (Refer to Fig C-17)
a. Removal. The coil outlet assembly need not
be removed for normal component or valve repairs
unless failure occurs in valve body assembly or in
pipe fittings. If removal is necessary proceed as
(1) Remove four instrument panel screws on
right side of mounting bracket.
(2) Remove valve handles which may in-
terfere with the panel when pivoted on hinge
(3) Swing panel away from steam cleaner and
disconnect gage tube lines, fuel control tube lines,
overheat bulb WEL, steam hoses and screw
mounted electric switch box.
(4) Remove clamps securing piping assembly
to unit and nipple for soap tank fill valve entering
(5) Remove heater shell cover and separate
coil outlet union. Remove nipple to coil outlet
assembly and gently lift assembly away from unit
being careful not to damage copper tube lines or
b. Installation. To install outlet coil assembly,
reverse procedures in paragraph 5-15a, steps (1)
through (5). Use teflon tape or pipe dope on all pipe
fittings and align assembly to panel hole location.
When mounting electrical switch box be careful
wires are not pinched between panel and junction
5-16. Coil Inlet Assembly (Refer to Fig C-14)
a. Removal. The coil inlet assembly consists of
a drain valve, copper tube and hose connector and
necessary plumbing hardware. To remove assembly
proceed as follows:
(1) Disconnect copper tube line, inlet hose,
drain nipple on outlet of valve, valve and street
elbow into cross.
(2) Unscrew cross assembly carefully not to
damage copper tube lines or electrical cables in
close proximity to assembly.
(3) Lift assembly free from steam cleaner.
b. Installation. To install coil inlet assembly
reverse procedures in paragraph 5-16a, steps (1)
through (3). Use teflon tape or pipe dope on all
fittings before securing. Secure all connections and
reconnect tube and hose assemblies.
5-17. Inner Coil (Refer to Fig C-18)
a. Removal. The inner coil may be removed
separately from the preheat section without
interference to the combustion chamber or related
assemblies. To remove proceed as follows:
(1) Remove heater shell hat from shell
(2) Disconnect and remove copper tubing
connecting the inner coil to preheat section.
(3) Separate union and remove nipple
connecting inner coil to outlet assembly.
(4) Remove bolts, nuts and washers securing
inner coil to preheat mounting tabs.
(5) Using a forklift or crane, lift inner coil
from the chamber.
b. Installation. To install the inner coil proceed
(1) Using a forklift or crane, lift inner coil
and gently lower into preheat coil.
(2) Align inner coil to preheat coil (inner coil
must be concentric to preheat coil).
(3) To achieve proper alignment flat washers
may be used between the inner and preheat coil
(4) Connect copper tubing between inner and
outer preheat section.
(5) Install connector nipple from inner coil to
coil outlet assembly and secure union connection.
(6) Replace heater shell hat and secure with
5-18. Preheat Coil (Refer to Fig C-18)
a. Removal. The preheat coil is an integral part
of the heater shell and combustion chamber fire
box and must be removed as a complete unit. To
remove proceed as follows:
(1) Follow instructions in paragraph 5-17a,
steps (1) through (5) for inner coil removal.
(2) Follow instructions in paragraph 5-15a,
steps (1) through (5) for outlet coil assembly
(3) Remove the four screws securing the
instrument panel on hinge assembly (heater shell).
(4) Remove burner plate assembly per
(5) Follow instructions in paragraph 5-16a,
steps (1) through (3) for coil inlet removal.
(6) Remove six ½-inch hex nuts supporting
heater shell to flame assembly.
(7) Remove three 3/8-inch hex nuts located