Blaze King APEX CBT, Operation & Installation Manual

Page: 30 / 40

OM-APEX E V1.06 November 19, 2012
Page 30
APEX CBT
MAINTENANCE cont.
GASKET INSPECTION
Inspect the door and bypass door gasket for physical deterioration, missing sections or obvious leakage. Th e
furnace front should make a groove in the gasket material - one side of the groove (toward the inside) will
oft en be dark or black, and the other side (toward the outside) should be light or white. Dark smudges on the
outside of the groove may indicate a smoke leak. If the groove is very shallow or missing, or if there is a heavy
ash or creosote deposit along the bottom edge of the gasket, it may need to be replaced. Frayed or broken gasket
material, or a gasket that is hard and unyielding, will also indicate need for replacement. Any time a piece of
gasket is missing or is broken anywhere, the entire gasket must be replaced.
To check the gasket further, insert a piece of paper (a dollar bill will work) into the door opening and close and
latch the door. Obvious resistance should be felt when pulling the paper out. Repeat this check several times
around the perimeter of the door.
Loading door gasket tightening instructions can be found below under point 8 and fi g. 28
For bypass door adjusting see ”MAINTENANCE cont.” on page 31.
LOADING DOOR GASKET REPLACEMENT
1. If the door gasket is to be replaced, be sure you have some 7/8” fi ber glass gasket material, ready to re-install.
See your Blaze King dealer.
2. Be sure the fi re is out and the furnace has cooled down. Th e door does not have to be removed from the
furnace.
3. With a pair of pliers, pull the old door gasket out of the channel and dispose of it.
4. Th
oroughly clean out the channel so the new silicone adhesive will adhere and the gasket will fi t smoothly
5. Run a small bead of a high temperature silicone adhesive (such as G.E. Silicone Sealer, or the equivalent)
along the center of the channel. DO NOT USE HOUSEHOLD SILICONE CAULKING . High
temperature silicone may be obtained from most auto parts stores.
6. Start the new gasket in the lower right corner. Do not stretch or cut the gasket. Distribute the gasket evenly
around the frame.
7. Close the Loading Door and allow the adhesive to dry.
8. Door adjustment: the door seal is adjusted by moving the latch catch on the furnace in or out. To do this,
undo the two bolts (see fi g.28). Th e gasket should be just tight enough to test ok as in step 9, do not over
tighten the latch which makes the door diffi cult to latch.
9. Check the fi t of the door gasket. Insert a narrow strip of paper into the door opening and close and latch the
door. Obvious resistance should be felt when pulling the paper out. Repeat this check several times around
the perimeter of the door.
Fig. 28
WARNING:
DO NOT OPERATE THIS WOOD FURNACE IF THE DOOR
GASKET IS MISSING OR DAMAGED.
DANGEROUS OVER FIRING CAN OCCUR WHICH CAN
DAMAGE THE APPLIANCE OR IGNITE CREOSOTE IN THE
CHIMNEY, POSSIBLY CAUSING A HOUSE FIRE. IF ANY PART
OF THE WOOD FURNACE OR FLUE SYSTEM IS GLOWING
THE FURNACE IS BEING OVER FIRED.