Owner's manual

3-12 Installation and Wiring
1503-UM051D-EN-P – June 2013
Three-Wire Control
If using three-wire control, the CLOSE contactor input is maintained
high using two contacts. Momentarily opening this input will cause
the IntelliVAC to open the contactor. Momentarily closing the
START contact will provide a CLOSE command to IntelliVAC
(given that all permissives are satisfied).
In this configuration, the STATUS output acts as a seal-in contact. If a
fault occurs, in addition to cycling control power over to the IntelliVAC
module, the CLOSE command must be removed for a minimum of 4
seconds before being re-applied. Refer to Figure 3.10.
∗ Refer to Table 3.A for recommended fuse sizing.
N'
N
EMC FILTER
G
P'
P
MOV
32
1
EC
-
+
4
TCO
12
11
AUX CCO
5
6
L1 L2/NG
+-
STOP
START
OVERLOAD
CONTROL
POWER
FUSE
*
CONTROL POWER
M-IV
910
CLOSE
M-IV
15 16
CONTACTOR
STATUS
M
M-IV
M
CAPACITOR
(OPTIONAL)
∗ Refer to Table 3.A for recommended fuse sizing.
N'
N
EMC FILTER
G
P'
P
MOV
32
1
EC
-
+
4
TCO
12
11
AUX CCO
5
6
L1 L2/NG
+-
STOP
START
OVERLOAD
CONTROL
POWER
FUSE
*
CONTROL POWER
M-IV
910
CLOSE
M-IV
15 16
CONTACTOR
STATUS
M
M-IV
M
CAPACITOR
(OPTIONAL)
Figure 3.10 – Three-Wire Control
Wiring Guidelines
Electrically Held
Contactors (cont.)