Lennox Hearth 32FS B - Removing Baffle Plate, Clean Behind Tube Scraper, Heat Exchange Tubes

Heat Exchange Tubes

Tube Scraper - Using the hole in the handle of the Grate Scraper Tool “grab” the scraper rod as shown in Figure 26. Using the Grate Scraper Tool, pull the rod up and out towards the opening of the firebox. Con- tinue pulling until the Tube Scraper reaches the top of the firebox. Pull the tube scraper out, then repeat 2–3 times to remove fly-ash from the heat exchange tubes.

It may be easier to clean the tubes if the heat exchanger baffle plate is removed first (located in the firebox below exchange tubes).

Baffle Removal - The baffle plate contains two keyhole slots (see Fig- ures 24A and 24B), which allows the two retaining screws to remain in place while removing the baffle plate. To remove baffle, loosen the two screws holding the baffle in place (do not fully remove). Slide the baffle plate to the left until the screw heads clear the open end of the key hole slots. Remove the baffle plate diagonally through door opening. The tube scraper rod can now be pulled in a more horizontal manner, which allows the scraper to move more freely.

Note: The baffle plate should be removed at least once a year to allow for a thorough cleaning.

DETAIL A
DETAIL A
Baffle	Baffle
Screw	Plate
Brick	Brick
	Panel
Retaining
Bracket
Figure 24A - Removing Baffle Plate
22

Front

Baffle Plate

Back

Keyhole Slots

(2 places)

Figure 24B - Removing Baffle Plate

Cleaning Behind Tube Scraper

WARNING

DO NOT USE BRUSH ON HOT STOVE

Clean between the heat exchange tubes using a cleaning brush as illus- trated in Figure 25.

With tube scraper rod pulled out 2 to 3 inches, insert brush behind tube scraper and remove ash build-up. Clean to the left and right side of heat exchanger, between tubes and the top of the firebox.

(Recommended Frequency of 2 weeks - 2 months)

Figure 25 - Clean Behind Tube Scraper

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE