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B. Damper Adjustment
Adjust the Damper as Needed
The tension on this appliance's damper is adjustable to
compensate for compression of the gasket that seals the
damper to the upper fireback. To adjust the damper:
1. Remove the griddle. Loosen the lock nut at the center of
the damper, Figure 6.2.
2. Turn the pressure screw approximately one half turn
clockwise with an Allen wrench provided with your stove.
3. Tighten the lock nut. Prevent the pressure screw from
turning as you tighten the nut. Re-test the damper.
Pressure Adjusting
Screw
Allen
Wrench
Figure 6.2 - Adjust the damper with the Allen wrench.
Tighten the Damper Handle as Needed
A handle on the left side of the stove controls the damper.
The handle attaches to the damper rod with a set screw.
Periodically check the set screw and tighten as necessary.
How to Adjust the Door Latches
The front door of the stove should close securely to prevent
accidental opening and should close tightly to prevent air
from leaking into the fire chamber. The door handle will be
positioned vertically when the door is closed.
Over a period of time, the gasket around the door will
ST554
compress and the latch may need adjustment. To adjust the
Damper adjustment
handle, follow this procedure:
11/00
1. Remove and retain the lock nut with a 9/16" wrench, Figure
6.3.
2. Loosen the set screw with a 1/8" Allen wrench.
3. Rotate the pawl 180°. Replace the lock nut. Tighten the
set screw.
4. Additional adjustment can be made by removing the flat
washer. Or any combination of washer removal and/or
pawl rotation.
Test the door seal. Close the door on a dollar bill and attempt
to pull it free. If the bill is freed with little resistance, the
gasket isn't snug enough at that spot. Continue to make
small adjustments until the setting is right.
If additional adjusting of the latch does not enable the door
to seal sufficiently in one area, try adjusting the gasket in that
area. Pack more cement or a smaller diameter gasket into the
channel beneath the gasket so the main gasket is raised and
makes contact with the door frame. If this procedure doesn't
solve the problem, replace the gasket. Instructions for gasket
replacement are given later in this section.
32
Vermont Castings • Defiant® Model 1975-CAT-C Installation Manual_R8 • 02/21
Lock Nut
Figure 6.3 - Rotate pawl and/or remove flat washer to adjust latch.
Damper
C. Gasket Replacement
Replace the Stove Gaskets as Needed
Your appliance uses fiberglass rope gaskets to make a tight
seal between some parts. With use, particularly on moving
parts, gaskets can become brittle and compressed and can
begin to lose their effectiveness. These will need periodic
replacement.
The sizes of replaceable gasket are listed below, along with
their applications.
Gasket Diameter......And the Parts it Seals
5/16" The griddle to the stove top (wire reinforced gasket)
5/16" The damper to the upper fireback
3/8" The front doors to the stove front; and the doors to
3/8" The ash door to the front of the bottom panel
3/16" The outer glass panes to the door
Wait until the fire is out and the stove has cooled. Be sure to
follow the standard safety procedure for working with dusty
materials: wear safety goggles and a dust mask.
The procedure for replacing gaskets is the same, regardless
of the gasket location. Follow these steps:
1. Remove the existing gasket by grasping an end and pulling
2. Use a wire brush or the tip of a screwdriver to clean
Roller
Lock Nut
Set Screw
Flat Washer
ST1154
door pawl
each other.
firmly, Figure 6.4.
the channel of any remaining cement or bits of gasket.
Remove stubborn deposits of cement with a cold chisel
if necessary, Figure 6.4.
Shoulder Screw
Handle Stub
8390-975
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