h
If the pump motor does not rotate in the correct
direction, disconnect power and switch any two
electrical leads at the main power terminal block
(
L1, L2, L3
). Reconnect power.
Repeat step 1
to
ensure motor rotates in the correct direction.
2.4.3 CUSTOMER INTERFACE
CONNECTIONS
The following customer interface connections are
available for remote control and monitoring
(See
:
•
TB1:5/TB1:6
Remote On/Off 24 V DC shutdown (C)
When activated, the remote on/off
connection shuts down the heating system.
When deactivated, normal heating will
resume. Use this connection for remote
operation of the heater when the
local
/
off
/
remote
switch is turned to
remote
.
NOTE:
The
24 V DC shutdown
connection
is wired
NC (normally closed)
from
the factory. To switch to NO operation
disconnect the wire from K1:12 terminal
and reconnect wire to K1:14 terminal.
•
TB1:7/TB1:8
Fault Signal (D)
The fault signal will indicate a heating system
shutdown, triggered by either the high-
limit temperature control relay or the motor
protection switch (
see
SECTION 4.1.1
).
3
COMPONENTS AND
OPERATION
The following is an operational description for each of
the OCSM interface and system components.
NOTE:
Components installed in control box may
vary depending on the particular system
configuration purchased.
3.1
INTERFACE COMPONENTS
3.1.1 ON/OFF SWITCH
•
on
– The system is
on
. If connected, the
system will turn on and shut off on a signal
from the 24 V DC remote connection.
See
SECTION 2.4.3
.
•
off
– The system is shut
off
.
K5
K6
MPS1
T1
T2
T3
14
L1
L2
L3
13
L1
L2
L3
TB1
K4
K3
K2
K1
5 7
6 8
4
3
2
2
1
1
W
L1
L2
L3
K4
K3
K2
K1
5 7
6 8
4
3
2
2
1
1
W
TB1
5 7
6 8
C
D
Figure 6. Main power supply and customer interface connections
as shown in the OCSM control box. Reference electrical schematic
drawing for proper wiring locations; the following illustrations are
typical customer interface locations.
A.
Main power terminal block
B.
Main power ground block
C.
Remote On/Off 24 V DC
shutdown
D.
Fault signal
L1
L2
L3
K4
K3
K2
K1
5 7
6 8
4
3
2
2
1
1
W
TB1
A
B
K4
21
22
K1
A1
A2
TB1-6
TB1-8
TB1-7
TB1-5
REMOTE ON/OFF 24VDC
FAULT WHEN CLOSED
