Airxcel Aqua-Hot 200 Series, Руководство по обслуживанию

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Fluid Circulation Pump
©Aqua-Hot®
250-D03 Diesel Series Service Manual REV 220302
p. 69
Burner Components
4. Remove the four ignition coil screws that secure the
ignition coil to the protection cap. Lift the ignition coil and
disconnect its black (+) and brown (-) wires from the C-plug
harness wires, prior to removing. Remove the protection
cap from the diesel burner so that the motor and clutch
halves are exposed.
5. Remove the three hex head screws that secure the motor
and motor flange to the blower housing. Remove the
motor and flange assembly along with the clutch halves.
Disconnect the motor’s black (+) and brown (-) wires from
the C-plug harness’ wires.
6. Remove the four blower housing screws that secure the
blower housing to the blower casing. Remove the blower
housing so that the combustion air blower is exposed.
7. Hold side-B (see Figure 112b) of the blower casing and
loosen the retaining nut located in side-A of the blower
casing. Remove the retaining nut, steel drive gear and thick
flat washer from the combustion air blower’s shaft. Lightly
tap the threaded end of the shaft so that the combustion
air blower can be easily removed from the blower casing.
8. With a pair of snap-ring pliers, remove the snap rings
from both side-A and side-B of the blower casing. Push all
the contents of the bearing kit out of the blower casing’s
bore/bearing cavity. Discard the retaining nut, steel drive
gear, snap rings, bearings, spacer tube, and washers, as
replacements are provided in the new bearing kit.
9. Install a new snap ring into side-A of the blower casing.
Once the snap ring is in place, insert the remaining
contents of the new bearing kit into side-B of the blower
casing, starting with the wave washer. Secure the bearing
kit assembly in place with the remaining snap ring.
10. Inspect the combustion air blower for warping and/or
damage. If warping or damage is visible, the combustion
air blower must be replaced.
11. Reference Figure 111 for exact placement of the three
washers that slide over the threaded end of the combustion
air blower’s shaft prior to installation. Failure to follow the
correct order and direction of the dished surfaces on the
washers will result in a restricted rotation of the combustion
air blower.
12. Slide the combustion air blower’s shaft (with the three
washers) up through the bearing kit assembly until the
threaded portion appears on side-A of the blower casing.
Place the new thick flat washer and steel drive gear on the
threaded end of the combustion air blower’s shaft. Thread
the new retaining nut on the combustion air blower’s shaft
until it is finger tight (DO NOT TIGHTEN).
13. Place a feeler gauge between the combustion air blower
and the flat surface of the blower casing. Slowly tighten
(or loosen) the retaining nut, holding the combustion air
blower, until a .018 - .020 gap is achieved. Remove feeler
gauge. Reference Figure 112a.
14. Spin the combustion air blower to ensure a friction free
rotation.
15. Reattach the blower housing to the blower casing using
the four blower housing screws. Reinstall the clutch half
on both the motor’s shaft and the combustion air blower’s
shaft. Attach the motor and flange assembly, with the
recessed edge of the motor flange in-line with the wiring
access slot of the blower casing, to the blower housing with
the three hex head screws. Reconnect the black (+) and
brown (-) wires of the motor to the C-plug harness’ black
(+) and brown (-) wires. Feed the C-plug harness’ yellow
and brown wires back through the wiring access hole in the
protection cap.
Dished
Surface
Washer
Dished
Surface
Washer
Flat
Washer
Figure 111
NOTE:
If the combustion air blower is rubbing, loosen the
retaining nut slightly, and lightly tap on the combustion air
blower’s shaft (opposite side) then readjust the gap.
NOTE:
It is recommended to mark the internal components
of the diesel burner prior to disassembling of the burner.
Mark between the motor flange and the blower housing, and
also between the blower housing and the blower casing. If
the burner is assembled improperly, the protection cap will
not go on.
NOTE: Be sure to observe the placement of the three washers
of the bearing kit. To ensure proper tension, the same order
and direction of the dished surfaces of the washers must be
followed when reassembling. See Figure 111.
NOTE: Be sure to inspect the blower casing’s bore/bearing
cavity for signs of damage due to potentially seized bearings.
If damage is present, the blower casing must be replaced.