SCOTSMAN WOOD FURNACE – INSTRUCTION MANUAL
Scotsman
Jun
-10
14
Low Speed Switching Relay Installation Instructions
1) Turn off power to the oil furnace and wood furnace.
2) Mount the switching relay in a junction box, in the blower compartment near the blower
motor and motor wires. If possible mount relay on rubber or foam pad to reduce noise in
ductwork.
3) Remove the white neutral wire from the blower motor, and connect it to a selected neutral
side of the relay coil.
4) Connect the white wire (item 2) to the second spade of the selected neutral side of the
relay coil, and the other end into the blower neutral wire location (where initial white wire
was removed).
5) Remove the black high-speed wire from the blower motor (this should be the selected
blower heating speed), and connect it to the power side of the relay coil (no relay spade
#).
6) Connect the black wire (item 3) to the second spade of the selected power side of the
relay coil, and the other end of the wire on to one side of the normally open contacts
(relay spade #1).
7) Connect the brown wire (item 4) to the high-speed connection on the blower motor, and
the other end of the wire on to the other side of the normally open contacts (relay spade
#3).
8) Remove the yellow low-speed wire from the blower motor (this should be the selected
low-speed in the furnace wiring box), and connect it to one side of the normally closed
contacts (relay spade #4).
9) Connect the yellow wire (item 5) to the low-speed connection on the blower motor, and
the other end of the wire on to the other side of the normally closed contacts (relay spade
#5).
10) Turn on power to the oil furnace and wood furnace. Check relay operation.
EVO/MAX Furnaces
– For furnaces that use either the EVO (9200i) or MAX (9300i) controls,
two extra 120 volt relays are required to interconnect the oil furnace to the wood furnace. If
using the MAX (9300i) control, an AC/Auxiliary Temperature Sensor (Part # K00-KA-0090-F3)
MUST be used, which is installed in the wood furnace plenum.
DO NOT
use the AC/Auxiliary
temperature sensor with the EVO (9200i) and a wood furnace.
2.7 DUCT
CONNECTION
(Fig. S101-5, Fig. S101-1)
See figure
S101-16
for
Approved Furnace Ductwork Configurations.
See figure
S101-17
for
Prohibited Furnace Ductwork Configurations.
The use of A/C coils is not recommended unless special arrangements are made.
Minimum cross-sectional area of ductwork from furnace should be approximately 180 sq. in.
with equal or larger size for return air.
