HP DB-102 - Manual (Page 14)

SCOTTY WOOD FURNACE – INSTRUCTION MANUAL
Scotty Oct-06 14
2.7 FREE-STANDING (Fig S102-4)
The KERR SCOTTY Wood Furnace is designed to be the sole source of central heating
in medium sized, well-insulated houses using an integral blower to circulate warm air. In
this system connect the ductwork, as you would for any conventional warm air heating
system except you use increased clearances.
NOTE: This furnace is not to be connected to ductwork that is still connected to another
furnace.
The wiring diagram for the Scotty is shown in Fig. S102-4.
ALL ELECTRICAL WIRING MUST CONFORM TO NATIONAL AND LOCAL CODES.
2.8 CONTROL SYSTEM (Fig S102-5)
The fan and limit control and the damper motor should be located as shown in Figure
S102-3 and S102-5.
The control system serves the following functions:
T822 – Room Thermostat – Wood Furnace
The primary control is the room thermostat located near the center of the house in the
main floor or near an existing thermostat. The thermostat operates the damper motor to
open and close the damper door thus allowing more or less air into the combustion area
to control the fire.
M847 – Damper Motor
The damper door lever should be attached to the damper motor wheel with the chain
included. Be sure the damper door is fully closed and the damper motor is not
powered. Connect the chain to the damper door level and to the bottom hole in the
damper motor wheel. As a final adjustment bend the top chain link slightly to vary the
damper position.
L4064R – Wood Furnace/Limit Control
The fan and limit control mounted in the plenum controls the operation of the circulating
blower and limits the air temperature to prevent the furnace from overheating.
Note: The fan/limit stand off bracket, provided in the wiring kit must be installed
under the fan/limit control.
Set Points
o
“ON” is usually set to 140 ? F (60°C). It turns on the circulating blower when the air
temperature in the plenum reaches this temperature.
o
“OFF” is usually set to 100°F (38°C). It turns off the circulating blower when the
circulating air temperature in the plenum drops to this temperature.
o
“Hi limit” is preset to 250°F (121°C). This will over ride the room thermostat to
close fire damper door if the wood furnace overheats.
ALL ELECTRICAL WIRING MUST CONFIRM TO NATIONAL AND LOCAL CODES.