Scotsman Ice DB-101 - Manual (Page 14)

SCOTSMAN WOOD FURNACE – INSTRUCTION MANUAL
Scotsman Oct-06 13
2.6.1 FREE-STANDING (Fig S101-9)
The KERR SCOTSMAN Wood Furnace in the free standing (stand-alone) system, is the
sole source of central heating using an optional blower box kit to circulate the air. In this
system connect the ductwork, as you would for any conventional warm air heating
system except you use increased clearances. The return air ducts are connected to the
blower box, which may be located on either side of the furnace.
NOTE: With the optional blower, this furnace is not to be connected to ductwork that is
still connected to another furnace.
2.6.2 ADD-ON (Fig S101-7, Fig S101-8)
The KERR Wood Furnace may be installed very satisfactorily in conjunction with
another furnace as tested by ETLM under standard 78-1 and CSA under standard
B365/1981.
In this installation the wood furnace is connected downstream in series with a new or
the existing oil furnace. The blower from the existing furnace provides the air
circulation. The SCOTSMAN may only be added in series downstream from an oil
furnace having an input rating (on original nameplate) of between 0.85 and 1.50 gph
(US) or SI equivalent.
For oil furnaces having multi-speed blowers with continuous circulation
capability.
Add-on furnaces such as the Kerr Scotty SS can be installed with oil fired warm air
furnaces such as the Kerr KD Gemini that have continuous blower circulation capability.
A relay must be used if the furnace is to maintain the continuous circulation feature.
The wiring diagram for this installation is Fig. S101 – 7.
Disconnect Low Speed Circulation Fan Switch if Optional Relay is not used.
Fig S101 - 8.
Disconnecting the circulation fan low speed switch.
If the red wire from the circulation fan switch, in the furnace wiring box, were
disconnected from the yellow wire leading to the blower compartment and both, red and
yellow wires marretted off then there would be no need for the switching relay
(Honeywell R4222D 1013 or equiv.).
In that case the two blue wires would marrette together at location “A” of “Add-On
Wiring” diagram, and provide power to the blower on high speed (black wire). The two
blue wires being 1.) Wood fan “ON” control and, 2.) Oil fan “ON” control.
Also 120 Volts can be fed back through any unused wire from the blower. All unused
wires should be marretted off.
Low Speed Switching Relay (This is an optional part) Fig S101 – 7.
The Honeywell (R4222D 1013 or equiv.) relay is to prevent power from being fed to the
blower motor on two motor windings at the same time.
The red wire from the circulation fan switch (Low Speed) on the oil furnace.