Catalytic Combustor - Vermont Castings Intrepid II 1990 Installation & Operating Manual

I N T
R E P
ID II
Figure 29 - The primary air shutter must move freely.
Pawl
ST524
Small
Intrepid II
Locking Nut
primary air shutter
11/22/00 djt
Large
Locking Nut
Set Screw
Figure 30 - Turn the door latch striker screw in or out to tighten
or loosen the door latch.
Tighten the Damper Handle as Needed
The damper handle is attached to the damper rod with a set
screw bearing against a flat spot on the rod. Check the set
screw periodically for tightness; tighten as needed.
Damper Adjustment
When the stove damper is closed, the pressure of the rod
against the damper plate assures a good seal between the
damper and the damper housing. Adjustment may be needed
after a period of time to retain adequate pressure.
To make this adjustment, start with the damper in the
closed and locked position. (Figure 31) Loosen the 7/16"
locking nut in the center of the damper. Use a 1/8" Allen
wrench to turn the Allen screw a full turn clockwise. Test the
damper for snugness, and continue adjusting the Allen screw
as needed. Tighten the 7/16" locking nut when the damper
operates smoothly but firmly.
21
Thermostat Lever
Primary Air Shutter
Striker Screw
Handle Stub
ST531
Door Pawl
11/00
Vermont Castings • Intrepid II 1990 UE Installation Manual_R22 • 07/19
Thermostat Cover
D-plate
Damper
Actuator
Rod
Locking Nut
Figure 31 - Tighten the damper adjustment screw for a snug seal.
ST532
The Catalytic Combustion System
damper adj
Inspection and Cleaning
11/00
This wood heater includes a catalytic combustor, which needs
periodic inspection and replacement for proper operation. In
the United States, it is against the law to operate this wood
heater in a manner inconsistent with the operating instructions
in this manual, or if the catalytic element is deactivated or
removed.
Under normal operating conditions the catalytic element
should remain active for two to six years (depending on the
amount of wood burned). However, it is important to monitor
the combustor periodically to ensure that it is functioning
properly as well as to determine when it needs to be replaced.
A probe thermostat, passing through the back of the stove into
the catalytic combustion chamber, automatically regulates
the catalytic combustion air supply. Deterioration of the probe
may result in decreased catalytic combustor performance.
A poorly-functioning catalytic combustion system will result
in a loss of heating efficiency, and an increase in creosote
and emissions.
The combustor should be visually inspected in place for
fly ash accumulation and physical damage three times per
year. Do not remove the combustor unless a more detailed
inspection is warranted because of diminished performance
as outlined below, or to inspect the probe thermostat.
The refractory package that houses the catalytic combustor
should be inspected annually for a buildup of flay ash, and
cleaned if necessary. This may be done during examination
of the combustor.
The probe thermostat should be inspected annually, or more
often if decreased catalytic combustion performance is not
due to a defective combustor.
Handle
Damper
Allen Head
Adjustment Screw
30003840