Aqua-Hot AHE-100-02S, Руководство по обслуживанию

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— Page 51 —
© 2011 Aqua-Hot
®
AHE-100-02S Hydronic Heating System Service Manual—Rev. B
Diesel-Burner Motor (continued) -
RPM Test:
1.
Disconnect the ignition cables from the ignition
electrodes.
2.
Remove the four ignition coil screws that secure the
ignition coil to the protection cap.
3.
Lift the ignition coil and disconnect its wires from
the C-Plug harness wires prior to removing.
4. Remove the protection cap from the diesel-burner
so that the motor and clutch halves are exposed.
5.
Place a few wraps of black electrical tape around
the clutch halves and then place a small piece of
reflective tape over the black tape.
6.
Disconnect the motor’s black (+) and brown (-)
wires from the C-plug harnesses black (+) and
brown (-) wires.
7.
Connect the motor’s wires directly to a 12 volt DC
power supply.
8.
Turn the power supply
ON
and use a photo-
tachometer to test for a proper RPM reading.
9.
At approximately 12 volts DC the RPM reading
should be 4500 RPM’s (+/- 300 RPM’s.) If the
motor’s RPM reading is not within the above specs,
the motor must be replaced.
NOTE: Test the diesel-burner’s bearings prior to reattach-
ing the diesel-burner head or replacing the motor.
Worn bearings can cause lower than normal RPM
readings and premature motor wear. To properly
test for worn bearings, reference the bearings func-
tion test section.
NOTE: It may be necessary to remove the diesel-burner to
remove the bottom two screws securing the protection cap in
place. Follow the direction on detaching and reattaching the
diesel burner.
Figure 38
S
ECTION
8: D
IESEL
-B
URNER
C
OMPONENTS
/T
ROUBLE
S
HOOTING