Here are step-by-step instructions for cleaning your Harman PF100 Pellet Furnace. These instructions are to be used in conjunction with the owner’s manual that came with your furnace. If you have any questions about the procedure please don’t hesitate to call your local authorized dealer. In order to maintain top efficiency it is important to clean and vacuum the inside of the furnace 3 or 4 times per burn season. The furnace is designed to be very easy to clean and it should take about an hour to complete. A thorough cleaning is required at the end of each heating season. Keep in mind that cleaning both your insert and venting system is essential. It boosts heat output and keeps the furnace running at maximum efficiency. Many Harman dealers offer annual cleaning services for their customers. Please read through this entire guide before beginning.
TOOLS YOU WILL NEED:
Dust Mask & Safety Goggles Shop vacuum w/fine dust (HEPA) filter Standard socket set or nut driver set Tooth brush 3” to 4” paintbrush Small putty knife Hearth glass cleaner Paper towels Rubber gloves (soot really gets into pores) Drop cloth Flashlight or drop light 4 in. flexible brush (for venting pipe) Burn pot scraper (included w/furnace)
TIPS BEFORE YOU START:
Be sure the furnace is completely out and cool (and unplugged from electrical power!). The furnace must be completely out before cleaning. Every part must be cool to the touch, including the pellets that are left in the burn pot. Live pellets are a fire hazard – especially if they get sucked into a vacuum cleaner. Every year there are stories of house vacuums catching fire by inadvertently sucking up hot ashes. Worse still this can be the source of a house fire! Hot ashes should be stored in a metal container with a tight fitting lid. When the ashes are completely out they can be used as a soil conditioner for your lawn or garden. Wear a dust mask! This is important! Don’t be foolhardy when it comes to protecting your lungs. Wear a mask and protective goggles. Professional chimney sweeps wear both while performing cleaning tasks.
STEP #1: PREPARE THE WORK AREA
Start by placing a drop cloth on the floor in front of your furnace. Alternatively you can use newspaper. Keep your tools on the drop cloth so you can wrap them in it and take them outside for cleaning when you are done.
STEP #2: CLEAN THE EXTERIOR OF THE BURN POT
Open the side access door (Fig. 1) and begin by removing loose soot deposits from within the burn pot. Remove the flame guide and vacuum the ash from the burn pot and above the burn pot (Fig. 2).
Fig. 2 Fig. 1
Clean the burn pot using the scraper provided (Fig. 3). Use the flat end of the scraper to remove the carbon from the burn pot. Alternatively use a hammer and a straight tip screw driver to tap the deposits loose.
STEP #3: CLEAN THE INTERIOR OF THE BURN POT
You’ll now need to clean ash from inside the burn pot. Remove the clean out plate under the burn pot by loosening the two wing nuts holding the plate in place (Fig. 4). You many need to use pliers to loosen the wing nuts initially. Vacuum all ash from the burn pot’s interior (Fig. 5).
Fig. 6 Fig. 4 Fig. 5
Use your finger to brush out any ash that can’t be reached with the nozzle of the vacuum (Fig. 6). After cleaning, be sure the plate is fully closed before hand tightening the wing nuts. (Note: Do not tighten the wing nuts with pliers.)
STEP #4: REMOVE THE UPPER BAFFLE PLATE
Remove the upper baffle plate from the firebox on the wall opposite the burn-pot. To accomplish this, lift the cover plate up about 1/2” and it can be removed for cleaning (Fig. 7). Use the pointed end of the scraper and a brush to clean the heat exchanger behind the cover, let the ashes fall into the ash pan. Clean the remainder of the inside of the burn chamber using the scraper, putty knife, brush and vacuum.
Second Baffle Plate: After all the...