Troubleshooting guide

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g) Back pressure on the stove caused by wind direction and velocity directly into the
exhaust termination point.
h) Increasing the number of elbows in the inlet pipe run.
See guidelines on the next page for the venting configurations of a Multi-Fuel stove.
Venting Guidelines
Type of Installation Size Recommendation
* 1) Less then 10' Horizontal 3" Acceptable
* 2) 10' to 12' Horizontal 4" Recommended
* 3) Over 12' Horizontal 4" Required
NOTE: Horizontal installation with runs greater than 12' is NOT RECOMMENDED.
4) Vertical less than 15' 3" Acceptable
* 5) Over 15' Vertical 4" Recommended
* 6) Above 4000' elevation 4" Recommended
* Elbows substantially reduce the overall acceptable length, 4” vent recommended in
vent systems with more than 2 elbows in the installation. Note: Four (4) inch vent may
be used in all installations. If in doubt, use 4” vent.
Factors that Increase the Draft Readings
a) Air draw on the stove caused by wind direction and velocity perpendicular to the
exhaust termination point. The "Venturi" effect draws air out of the stove faster, thus
increasing the vacuum in the stove.
b) Tall chimneys that have good natural draft will increase draft readings.
Direct Vent Installations and the use of Battery Back-ups
Although the stoves have been tested and approved for direct vent installations and many
customers choose to hook up their Multi-Fuel Stoves using this type of installation. We
recommend that there be a minimum of a 3' vertical rise to help prevent excessive smoke
backup in case of a power failure to the stove. This is helpful, but wind could still cause
smoke to spill into the home if it puts back-pressure on the vent system. We recommend
the use of a battery backup system if the customer has a problem with intermittent power
failures. A good quality Computer back-up system will work as long as it provides
“PURE SINE WAVE” output. These type of back-ups will usually provide anywhere
from 15 to 45 minutes of back up power. There are systems on the market specifically
designed for Corn stoves requiring “PURE SINE WAVE” that will offer longer back-up
times by utilizing one or more deep cycle batteries hooked to the back-up system.
St. Croix does not market a Battery Back-Up system for the Corn stoves.