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26
WIRING DIAGRAMS
Interior-Mounted Blower Motor
SEL0016521A
1° Speed
2° Speed
GY
BR
GY
BK
BU
GY
RD
WH
BK
RD
RD
Note: Wiring for external
blower motor
Note: Wiring Diagram is drawn
with plenum in down position
8
Component Layout
RD
RD
BR
BR
GY
BU
GY
BU
GY
RD
WH
BK
GY
RD
WH
BR
BK
GY
RD
WH
BR
BK
BK
BR
WH
RD
WH
RD
BR
BR
GY
RD
BR
BR
BU
GY
BK
WH
YL/GN
GY
BU
Common
3° Speed
4° Speed
Power supply
120VAC
Frequency 60Hz
Wattage rating 420W
Amperage 3.7A
Motor Resistance
Blue - White 21.6 Ohms
Blue - Red 18 Ohms
Blue - Gray 14.3 Ohms
Blue - Black 9.8 Ohms
DescriptionNum.
9
8
7
6
5
4
3
2
1
Start Sw. - Plenum Up/Down
Blower Speed Switches
Blower Motor
Plenum Drive Motor
Motor microswitch
Plenum Up Limit Switch
Plenum Down Limit Switch
Filter microswitch
Filter microswitch
RD
GY
BR
BR
GY
Blower Switch operation
Contact
Function
1 - 3 OFF
3 - 5
1st Speed
5 - 7
2nd Speed
8 - 10 3rd Speed
10 - 12
4th Speed
GND L N
Motor Specifications
S50
4° Speed
3° Speed
2° Speed
1° Speed
Note: Wiring Diagram is drawn
with plenum in down position
Component Layout
RD
RD
RD
GY
YL/GN
BR
YL
Neutral
BU
BK
GY
RD
WH
WH
RD
GY
BK
BU
BR
BU
BR
GY
RDRD
GY
BR
BR
BR
BR
BU
GY
GY
GY
GY
GY
BU
WH
BK
YL/GN
GND L N
RD
BK
GY
RD
WH
BR
BK
GY
RD
WH
BR
BK
WH
RD
BR
Motor Specifications
Power supply
Frequency
Wattage rating
Amperage
Motor Resistance
120 VAC
60 Hz
420 W
3.7 A
Blue - White
Blue - Red
Blue - Gray
Blue - Black
21.6 Ohms
18 Ohms
14.3 Ohms
9.8 Ohms
Blower Switch operation
Contact
Function
1 - 3
3 - 5
5 - 7
8 - 10
10 - 12
Off
1st Speed
2nd Speed
3rd Speed
4th Speed
Num.
Filter microswitch
1
2
3
4
5
6
7
8
9
Filter microswitch
Plenum Down Limit Switch
Plenum Up Limit Switch
Motor microswitch
Plenum Drive motor
Blower motor
Blower Speed Switches
Start Sw. - Plenum Up/Down
Description
SEL0015061B
8
9
2
1
5
3
6
M
M
1 2 3
4
7
1
1
3
2 4
5
6
7
8
9
10
11
12
N.O.
N.C.
COM
N.O.
N.C.
COM
N.O.
N.C.
COM
N.O.
N.C.
COM
1
1
N.O.
N.C.
COM
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