Vermont Casting 1910, 0968 Check the Operation Primary Air Shutter, Adjust the Damper as Needed

Vermont Castings Defiant

Check the Operation of the

Primary Air Shutter

The primary air shutter is at the back of the ash drop and is visible from the back of the stove. (Fig. 33) The shutter must open and close freely when you move the thermostat lever. If it doesn’t, remove any obstruction. If you need assistance, consult your local Vermont Castings Authorized Dealer.

Do not change the adjustment of the cable in an attempt to gain increased firing. The air shutter controls how much air can enter the stove, but chimney draft is the force that pulls air into the stove. If changing the thermostat handle position does not lead to changes in the fire's intensity within four or five minutes, it's probably due to weak chimney draft (in the case of a weak fire you can't increase) or an air leak in the stove (in the case of a fire you can't decrease).

DEFIANT

ST548 Primary Air Shutter

Fig. 33 The primary air shutter must move freely.

Adjust the Damper as Needed

The tension on the Defiant'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. (Fig. 34)

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

AdjustingLock Nut

Screw

Allen	Damper
Wrench

ST554

Fig. 34 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 Defiant’s doors should close securely to prevent accidental opening and to keep air from leaking into the stove. On adequately adjusted doors, the handles should resist slightly as they are turned to the closed position and the doors themselves should be drawn slightly toward the stove.

Over time, the gasket around the doors will com- press and the latches may need adjustment.

To adjust the latches, loosen the small lock nut, rotate the striker screw a half-turn, and re-tighten the small lock nut. (Fig. 35) Your stove kit includes an Allen wrench for latch adjustments. Hold the striker screw to keep it from turning as you tighten the lock nut. Make repeated small adjustments until the setting is right.

Pawl

Small

Locking Nut

Striker Screw

Large

Locking

Nut

Set Screw

Handle Stub

ST531

Fig. 35 Turn the door latch striker screw in or out to tighten of loosen the screw.

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