Owner`s manual

Scotsman Wood Furnace – Instruction Manual
Scotsman Nov-05
16
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.
The blue heating wire from the wood fan limit control on high speed.
This relay will disconnect the circulation fan low speed switch and connect the high
speed to the blower motor when there is a call for heat.
Items required:
o Switching Relay R4222D 1013 (120 V Coil, 12 amp @ 120 Vac), or equivalent.
o Junction box (4” x 4”) and cover.
o Square extension box (4”x 4” gyproc extension).
o Two plastic universal bushings or junction box connectors.
o White wire (12”), two insulated spade connectors.
o Black wire (6”), two insulated spade connectors.
o Brown wire (12”), two insulated spade connectors.
o Yellow wire (12”), two insulated spade connectors.
o Two cabinet mounting screws.
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).