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NS803 P1
Rev.B 03-09-07
ELECTRO INDUSTRIES, INC.
MONTICELLO, MN 55362
Air Handler (HE-E-20-21), Basic Staging ECM
WIRING SCHEMATIC
AIR HANDLER BASIC STAGING ECM
MODEL: HE-E-20-21
J3
TB2
TB1
T5
T6
F1
T8
T7
T1
T2
T4
T3
T15
LED4
LED1
J7
T11
T12
T13
T14
T9
T10
J4
K2
K3
K5
K4
LED2
J2
LED3
J1
HEAT
HI
MED
LO
COOL
D
C
B
A
CS
UPCB6707
PWR
ECM
BLUE
BLU/WHT
BK
DF(W1)
Y1
HEAT
COOL
RV LOGIC-HI
C
RV(O)
R
Y/Y2
COM
VAC
24
R
W
G
Y/Y2
C
Y1
BK
E
G
O
Y
10
9
8
7
6
5
J2
1
2
3
4
M
HECBW5843
HECBW5844
CB2 L2
CB2 L1
CB1 L2
CB1 L1
CB1 L2
CB1 L1
COMPONENT CODE
CB CIRCUIT BREAKER
E 5000W ELEMENT
HL HI-LIMIT
K RELAY
M
MOTOR (BLOWER)
PC CIRCUIT BOARD
T TAB TERMINAL
SC SCREW TERMINAL
WIRE COLOR CODE
BL BLUE
BLW
BLUE/WHITE
BK BLACK
BR BROWN
BRY
BROWN/YELLOW
GY GRAY
OR ORANGE
OBK
ORANGE/BLACK
R RED
RW
RED/WHT
VI VIOLET
W WHITE
WBL
WHITE/BLUE
WBK
WHITE/BL
ACK
Y YELLOW
YG
YEL/GRN
NS803 P1
UAW806 A
DECAL
DRAWING
Rev.B 03-09-07
RELAY STAGING
1 K5
2 K6
3
K7, K8
NOTES
1. SENSOR CABLES AND
CONNECTIONS NOT SHOWN.
2. STAGES 1-4 ARE 24VAC
WHEN INACTIVE.
INTERFACE
PC1
R
R
R
R
R
K8
K8
E4
E3
E2
E1
HL4
150°F
150°F
HL3
150°F
HL2
150°F
HL1
CB1
L2
L1
CB2
L2
L1
BK
BK
BK
BK
BK
BK
BK
BK
HL5
135°F
RW
RW
T14
J4
T12
T11
K7
T8
LED3
T10
T9
LED4
T7
LED5
LED2
K6
K5
K1
T4
T3
T6
LED1
T5
T2
UPCB6600B
T13
CS
LED6
T1
F
G
Y2
O
R
W2
X
W1
C
R
R
R
R
R
R
RW
HECBW5848
RW
K5
K6
K7
PC2
DI
GND
R
GY
BR
W
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