Troubleshooting guide

Page 19
NOTE: If the stove has been brought in from a cold environment (an unheated warehouse),
the reading you get may be lower than normal. The High Temp Lubrication used in the
Combustion fan does not allow the fan to spin as easily as a fan at room temperature.
Figure 6
Factors that Decrease the Draft Readings once the unit is installed.
a) Altitude**
b) The following factors are in addition to installation procedure:
c) Increasing the exhaust pipe vertical length without increasing exhaust pipe diameter when
required for installation. **
d) Increasing the horizontal exhaust pipe length. **
e) Increasing the number of tees and elbows: the exhaust vent piping will, for most applications,
have two (2) 90-degree bends. More than three (3) bends in the exhaust vent is allowed but is
NOT RECOMMENDED.
f) Increasing the air inlet pipe length recommended for installation without increasing the
diameter of the pipe. It is recommended to increase the air inlet pipe to 3" diameter for runs
over ten (10) feet and at elevation over 4000'. Excessive runs (15 feet+) should be avoided.
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 pellet stove.