7
installation
&
operation
manual
|
oxm
/
ogm
heating
system
A
B
D
C
E
Figure 5. Main power supply and customer interface connections as
shown in the OXM/OGM control box. Reference electrical schematic
drawing for proper wiring locations; the following illustrations are
typical customer interface locations.
A.
Main power ground block
B.
Main power terminal block
C.
Fault signal
D.
Motor run signal
E.
Remote On/Off
24 V DC shutdown
TB2:3
TB2:5
TB2:5
TB2:1
TB2:2
TB2:4
TB2:6
K2
K5
K3
K4
24 V SHUTDOWN
RUN CONTACTS
FAULT CONTACTS
11
14
21
22
13
13
14
A1
A2
•
OB2:1/OB2:2
Fault Signal (C)
The fault signal will indicate a heating system
shutdown, triggered by either the high-
limit temperature control relay or the motor
protection switch (
see
SECOIO 5.1
).
•
OB2:3/OB2:4
Motor Run Signal (D)
A motor run signal indicates the pump motor
is running. If no signal is present, the pump
motor is not running.
•
OB2:5/OB2:6
Remote On/Off 24 V DC shutdown (E)
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
.
OOE:
The
24 V DC shutdown
connection is
wired
C (normally closed)
from the
factory; see system wiring schematic
for directions to switch to NO (normally
open) operation.