TM 9-4940-342-14&P
(3) Loosen scanner cable squeeze connector
at back of electrical control box.
(4) Remove front fire panel.
(5) Disconnect scanner from scanner sight
tube.
(6) Remove scanner from unit.
b. Installation. To install the flame scanner
proceed as follows:
(1) Route flame scanner cable through
squeeze connector at back of electrical control box.
(2) Connect scanner leads to terminals S1 and
S2 of relay terminal board.
(3) Tighten squeeze connector around scanner
cable.
(4) Connect scanner to sight tube on burner.
(5) Perform procedures in paragraph 5-43b.
(6) Replace front fire panel.
5-45. Flame Safeguard Mounting Base (Refer to
Fig C-13)
a. Removal. To remove the flame safeguard
mounting base proceed as follows:
(1) Accomplish procedures in paragraph 5-
43a, steps (1) through (4).
(2) Disconnect all electrical leads to flame
relay terminal board. Withdraw leads through
knockouts in base.
(3) Remove scanner cable squeeze connector
and jam nut from back of base.
(4) Remove four mounting nuts and lock-
washers from base.
(5) Remove base from box.
b. Installation. To install the flame safeguard
mounting base proceed as follows:
(1) Align base with mounting holes in box.
(2) Secure base with four mounting screws,
nuts and lockwashers.
(3) Install scanner cable squeeze connector in
hole provided at back of base. Tighten in place with
jam nut.
(4) Route flame scanner electrical leads
through knockouts in base. Connect leads to
terminal board.
5-46. Fuse Holder (Refer to Fig C-13)
a. Removal. To remove the fuse holder proceed
as follows:
(1) Remove electrical control box cover.
(2) Cut
electrical
leads
at
soldered
connections of fuse holder.
(3) Remove locknut retaining fuse holder in
place.
(4) Remove fuse holder from box.
b. Installation. To install the fuse holder
proceed as follows:
42
(1) Install fuse holder in hole provided in side
panel.
(2) Secure fuse holder with locknut.
(3) Strip insulation on electrical leads to fuse
holder ¼-inch and solder to fuse holder terminals.
(4) Replace electrical control box cover.
5-47.
Blowdown Pushbutton (Refer to Fig C-13)
a. Removal. To remove the blowdown pushbutton
proceed as follows:
(1) Remove electrical control box cover.
(2) Disconnect electrical leads at pushbutton
terminals.
(3) Remove locknut retaining pushbutton in
place.
(4) Remove pushbutton from box.
b. Installation.
To
install
the
pushbutton
accomplish procedures in paragraph 5-47a, steps (1)
through (4) in reverse order.
5-48. Magnetic Starter and Breaker Switch
Assembly (Refer to Fig C-28)
a. Removal. To remove the magnetic starter and
breaker switch assembly proceed as follows:
(1) Remove rear machinery access panel.
(2) Disconnect power cord from disconnect
switch.
(3) Loosen squeeze connector at disconnect
switch and remove power cord from switch.
(4) Disconnect motor power leads at magnetic
starter.
(5) Remove liquidtite connector from magnetic
starter to motor at magnetic starter.
(6) Disconnect control transformer primary
leads at magnetic starter terminals L1 and L2.
(7) Disconnect magnetic coil control power
conductors no. 2 and 11.
(8) Remove liquidtite connector from magnetic
starter to electrical control box at magnetic starter.
(9) Remove three mounting screws, nuts and
lockwashers
securing
switch
mounting
plate
assembly to soap and fuel tank mounting plate.
(10) Remove
starter
and
breaker
switch
assembly from unit.
b. Installation. To install magnetic starter and
breaker switch assembly.
(1) Align assembly to three mounting holes in
soap and fuel tank mounting plate.
(2) Secure assembly with mounting screws,
nuts and lockwashers.
(3) Connect liquidtite connector from control
box to magnetic starter. Secure with electrical jam
nut.
