Aqua-Hot AHE-100-02S, Service Manual

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— Page 57 —
© 2011 Aqua-Hot
®
AHE-100-02S Hydronic Heating System Service Manual—Rev. B
Failure to connect a jumper wire across the ignition elec-
trodes, or to remove the ignition cables from the ignition
electrodes will result in a HIGH VOLTAGE shock and/
or a fire. If the ignition cables are removed, be sure to
place a piece of electrical tape on the end of each cable.
Ignition Electrodes
Replacement Procedure: (continued)
5.
Insert the new electrode into the orange electrode
boot, and snap into place. Pull firmly on the elec-
trode to make sure the retaining clip has secured the
electrode in place.
6.
Slide the electrode into the photo disc.
7.
Install retaining clamp and retaining clamp bolt and
finger tighten.
8.
Follow steps 2 - 5 to properly adjust the electrodes.
Fuel Nozzle:
The fuel nozzle is simply a fuel atomizer. It reduces
the diesel fuel into a fine spray which is mixed with
incoming combustion air and is ignited within the
combustion chamber.
Fuel Nozzle Component Test:
1.
Follow the directions for detaching the diesel burner,
in section 7, of this manual.
2. Remove both the ignition cables from the ignition
electrodes, or connect a jumper wire (with alligator
clips) across the metal tips of the electrodes.
3.
Remove the B-plug from the diesel-burner head’s
controller.
4.
Turn the diesel switch
ON and then plug the B-plug
back into the diesel-burner controller to activate the
diesel-burner. After approx. 20 seconds the fuel
solenoid will “click” and a fine mist of fuel should
appear from the fuel nozzle in a cone shaped spray
pattern.
NOTE:
In order to perform the following procedures it is
necessary to detach and reattach the diesel-burner
head. Be sure to review section 7 for detaching and
reattaching instructions.
Figure 43
S
ECTION
8: D
IESEL
-B
URNER
C
OMPONENTS
/T
ROUBLE
S
HOOTING