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LT 90 Owners Manual
2015
Safety
Fuel
• Never shut power off to the LT90 if there is a fire and fuel in the firebox unless
there is an emergency.
• Take the proper precautions to ensure that the modifications made to an existing heating system does not
interfere with existing safety controls.
• Never use the following: trash, plastics, gasoline, rubber, or naphtha in your WoodMaster LT 90.
• Read and follow these directions carefully. Retain this manual for as long as you own your LT 90.
Sweeping
The chimney should be inspected and cleaned as needed, typically twice a year. This is to be done by qualified
persons. Shut off the furnace, disconnect power and allow the system to cool before attempting to clean the
system.
Warning!
Always disconnect the power to the furnace before any cleaning or maintenance. Service agreements increas
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es operation length and life of the unit. For more information contact your local WoodMaster dealer.
Replacement parts should only be genuine Northwest Manufacturing, Inc. components. Your dealer can supply
the genuine service parts and install them.
All fuels must conform to certain quality standards to ensure trouble free operation of the furnace. Use
of unapproved fuels may result in faulty operation and a voided warranty. Never use the following: trash,
household garbage, plastics, gasoline, rubber, naphtha, leaves, and materials treated with petroleum prod
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ucts (ie: particleboard, railroad ties & pressure treated wood). Newspaper and plain, unprinted cardboard
should only be used as kindling, not as fuel. Other paper products should not be used. Please contact your
WoodMaster dealer for any questions on fuel use.
Only cut, split, seasoned wood with a internal moisture content of 25% or less may be used. Wood can be cut
to a maximum length of 27 inches. The wood should always be placed horizontally and parallel to the firebox
wall. The pieces of wood should be stacked as tightly as possible whereby the face of the wood should NOT
touch the firebox wall. This ensures proper air flow. DO NOT burn any large, round pieces of wood. DO NOT
burn any “green wood”, or any wood that is above the 25% moisture limit.
Water Content
The maximum permitted water content is 25%.
Bark Content
The maximum permitted bark content is 20%.
