Service manual

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600-D01 Series Hydronic Heating System Service Manual - Rev. A

APPENDIX D: AQUA-HOT MAINTENANCE

Step 11: Inspect Photo Disc

Photo Disc

1. If the photo disc is not free floating, the electrode clamp bolt has been over-tightened, and has bent the

electrode clamp. Using a 10mm socket remove the electrode clamp, and re-straighten.

-Lay the clamp’s beveled side down on a solid flat surface and align the thick end of the punch at dead

center. Tap the punch lightly until the retaining clamp returns to proper form.

Step 12: Re-Install Diesel Burner

1. Align the Diesel-Burner with the Hydro-Hot, using the alignment tabs welded on the Hydro-Hot.

Swing the Eye Bolts around the “Ears” on the diesel burner and securely tighten, using a 10mm

socket with a 10 inch long extension.

NOTE: When re-installing the diesel burner

be careful not to damage the photo disc or

bend the electrodes. Also, be careful to not

pinch any wires between the burner and the

Aqua-Hot Tank.

Use extreme caution when tightening down the eye-bolt nuts, over tightening of the eye-bolt

nuts can cause the aluminum blower casing to crack. (Torque Specifications = Approxi-

mately 20-40 in. lbs.)

Figure D13

Figure D14