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LT 90 Owners Manual
2015
Trench
The trench must be 24 inches deep and 6 to 12 inches wide. It can be dug with a shovel or a backhoe. Place all
the dirt to one side of the trench to allow room for working on the other side.
Wiring
Place electrical supply in bottom of trench and cover with 6 inches of dirt. Electrical wire rated for under
-
ground use (14-2 +ground) can be buried in the same trench as the water lines but must maintain a minimum
24 inch depth. Always follow state and local codes.
Water Lines
The remaining 18 inches of open trench is where the water lines are placed. Use only water line approved by
Northwest Manufacturing through your Woodmaster Dealer.
NOTE:
If lines travel under a driveway or where heavy equipment travels, the line should be buried two to
three feet deep. If lines travel through a low or wet area, they should be insulated and installed in a water tight
piping, (PVC).
Note: Leave a minimum of three feet of water line exposed above ground at the furnace to
insure adequate length for connection.
Note: Before insulating and burying the water lines, label the hot water supply line at both ends. Once the
lines are covered you will be able to easily determine which line is connected to the pump.
Note: Use only approved water line insulation sold through your WoodMaster Dealer. Poor insulation will
cause your Wood Master furnace to burn large amounts of fuel, and hurt the efficiency of the system. For
best results use high quality insulation.
Note: Remove the chimney cap before firing your LT 45. Replace the Chimney cap when the furnace is off for
extended periods.
Note: Check the firebox and remove any accessories that are included with the LT 45 before starting the
furnace.
Installation
