Owner`s manual

Scotsman Wood Furnace – Instruction Manual

Scotsman Nov-05

Fan and Limit

The fan and limit control mounted in the plenum controls the operation of the circulating

blower and prevents the furnace from over-heating. When the air temperature in the

plenum reaches the “ON” set point of the fan switch (usually 140º F (60º C)) the blower

starts and runs until the plenum cools to the “OFF” set point (usually 100º F (38º C))

when the blower is switched off. The limit function in this control is usually set at (280º

F (138º C)) and will override the room thermostat to close the damper door if the

furnace overheats, and will also prevent the oil furnace from starting.

1.8 Electrical Power Failure (Fig S101-3)

If no one is home during a power failure, the damper will automatically close and some

gravity heating will take place. Combustion air will continue to enter through the

secondary air holes and a fire should be maintained.

IMPORTANT – This furnace is CSA certified for operation under Power Failure only if

optional gravity air inlet kit is installed.

For optimum heating during a power failure follow the procedure listed below:

For Power Failure operation remove the power failure gravity air inlet cover before

starting or refueling during power failure. The cover is an option available from your

KERR dealer. The kit must be installed on the cabinet side directly opposite to the entry

of the blower or oil furnace “S” connection ductwork.

Manually open the blower compartment access door of wood or connected oil furnace

to allow gravity flowing air to all areas. (Check with your installer).

Place a coin under the damper flap in such a way that it will fall clear when power is

restored.

Maintain a careful watch on the furnace temperature. If it should exceed 200º F (95º C)

close the damper door.

Do not leave the furnace unattended in this position.

Refuel frequently with small loads to maintain a small fire at ½ normal maximum

volume.

Do not expect to maintain maximum comfort under no power conditions.

Do not allow anyone who is unfamiliar with the operation of the furnace to attend it

during a power failure.