19
6. WIRING DIAGRAMS (CONT'D)
WARNING
• Risk of electric shocks. Before performing any maintenance or servicing, always disconnect the unit from its power source.
• This product is equipped with an overload protection (fuse). A blown fuse indicates an overload or a short-circuit situation.
If the fuse blows, unplug the product and check the polarity and voltage output from the outlet. Replace the fuse as per the
servicing instructions (refer to wiring diagram for proper fuse rating) and verify the product. If the replaced fuse blows, it may
be a short-circuit and the product must be discarded or returned to an authorized service center for examination and/or repair.
!
LINE
NEUTRAL
120 VAC
J10-2
J10-1
EXHAUST FAN
MOTOR M1
M
K1
J5-1
J5-2
SUPPLY FAN
MOTOR M2
M
K3
J4-1
J4-2
J9-4
OPTIONAL DAMPER SYSTEM
DAMPER MOTOR
M3
M
J2-1
J3-1
J2-2
J3-2
J12-1
J12-2
K4
J8-2
J8-1
J8-5
J8-4
J11-1
J11-2
S1
K4K1 K2 K3 K5
+
-
~
~
T1
9.5 VAC 24 VAC
J9-1
F1
321
JU1
M
H
WIRING DIAGRAM
LINE VOLTAGE FACTORY WIRING
CLASS 2 LOW VOLTAGE FACTORY WIRING
CLASS 2 LOW VOLTAGE FIELD WIRING
OVERRIDE SWITCH
(OPTIONAL)
F
IELD WIRING
REMOTE
CONTROL
FURNACE BLOWER
INTERLOCK
(OPTIONAL)
B
G
R
R
G
BK
Y
Y
OL
OC
I
J14
10
9
8
7
6
5
4
3
2
1
J13
ICP
A1
ELECTRONIC
ASSEMBLY
12345
J12
J11
12
4321
J9
J10
21
F1
3A
3AG T
YPE
321
JU1
MH
4321
5
J8
J5
J7
1
1
2
2
3
J6
1
2
J4
1
2
3
BK
W
G
120 VAC
60 Hz
M1
BL
BK
EXHAUST FAN
MOTOR
T1
24 V Class 2
9.5 V
Class 2
120 V
neutral
BK
W
Y
Y
O
O
W
S1
DOOR INTERLOCK SWITCH
(OPTIONAL, MAGNETICALLY
ACTUATED
REED SWITCH)
W
J20
12
R2
THERMISTOR
Critical characteristic.
NOTES
1.
Use specified UL listed/CSA Certified line fuse.
2. If any of the original wire, as supplied, must
be replaced, use the same equivalent wire.
3. Field wiring must comply with applicable
codes, ordinances and regulations.
4. Remote controls (class 2 circuit) available,
see instruction manual.
5. Furnace fan circuit must be class 2 circuit only.
K2
CPU
LOGIC DIAGRAM
VE0375A
COLOR CODE
BLACK
BLUE
GREEN
GREY
BK
BL
G
GR
ORANGE
RED
WHITE
YELLOW
O
R
W
Y
NC NO CONNECTION
R1
THERMISTOR
12345
J15
Y
BL
R
W
nc
FROM
SUPPLY
MOTOR
CONTROL
CABLE
12345
J17
Y
BL
R
W
nc
FROM
EXHAUST
MOTOR
CONTROL
CABLE
G
Y
BL
R
W
CONTROL
CABLE
POWER CABLE
TO A1-J17
M2
BL
BK
SUPPLY FAN
MOTOR
G
Y
BL
R
W
CONTROL
CABLE
POWER CABLE
TO A1-J17
J9-1
TO A1-J17
TO A1-J15
21
5
4321
12
J3
J2 J1
M3
A2
THERMISTOR
DAMPER ELECTRONIC
ASSEMBLY
DAMPER MOTOR
R1
BK
BK
OPTIONAL DAMPER SYSTEM
OR
S10 ERV ECM AND 70E ECM UNITS
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