Owner`s manual

SCOTTY SS – INSTRUCTION MANUAL

Scotty SS Nov-05

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 S202-3A)

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:

(1) 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. (See Fig.

S202-3A).

(2) 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)

(3) Place a coin under the damper flap in such a way that it will fall clear when

power is restored.

(4) Maintain a careful watch on the furnace temperature. If it should exceed

200º F (95º C) close the damper door.

(5) Do not leave the furnace unattended in this position.

(6) Refuel frequently with small load to maintain a small fire at ½ normal

maximum volume.

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

(8) Do not allow anyone who is unfamiliar with the operation of the furnace to

attend it during a power failure.

1.9 HOMEOWNER CHECKLIST