CB780E/CB784E RELAY MODULES WITH VALVE PROVING
32-00150—03
16
750-234
Fig. 13. Wiring the Data ControlBus™ Module with
Remote Keyboard Display Module.
ASSEMBLY
Mounting CB780E/CB784E Relay
Modules
NOTE:
For installation dimensions, see Fig. 2.
Relay Module Mounting
1.
Mount the CB780E/CB784E vertically. See Fig. 14
or
mount horizontally with the knife blade terminals
pointing downward. The CB780E/CB784E must be
in an electrical enclosure.
2.
Select the location in the electrical enclosure. Be
sure to allow adequate clearance for servicing,
installation and removal of the CB780E/CB784E,
Keyboard Display Module, flame amplifier, flame
amplifier signal voltage probes, electrical signal
voltage probes, and electrical connections.
a. Allow an additional two inches below the
CB780E/CB784E for the flame amplifier mount-
ing.
b. Allow an optional three-inch minimum to both
sides of the CB780E/CB784E for electrical sig-
nal voltage probes.
3.
Make sure no subbase wiring is projecting beyond
the terminal blocks. Tuck wiring in against the back
of the subbase so it does not interfere with the knife
blade terminals or bifurcated contacts.
IMPORTANT:
The CB780E/CB784E must be installed with a
plug-in motion rather than a hinge action.
4.
Mount the CB780E/CB784E by aligning the four
L-shaped corner guides and knife blade terminals
with the bifurcated contacts on the wiring subbase
and tightening the two screws securely without
deforming the plastic.
Installing the Purge Card
1.
Remove the Keyboard Display Module or DATA
CONTROLBUS MODULE™, see Fig. 16 or 17.
2.
Remove the current Purge Card from the
CB780E/CB784E by pulling the plastic support
cover upward.
3.
Make sure that the Purge Card selected has the
desired timing.
4.
Insert Purge Card into the opening of the
CB780E/CB784E compartment, see Fig. 15
5.
Reinstall the Keyboard Display Module or DATA
CONTROLBUS MODULE™ onto the
CB780E/CB784E and restore power to the device.
6.
Run the burner system through at least one com-
plete cycle to verify the system is operating as
desired.
Fig. 14. Electrical panel installation.
IMPORTANT:
The CB780E will not function properly without one
of the following mounted correctly: Keyboard Dis-
play Module, or DATA CONTROLBUS MODULE™.
1
1
2
2
832-1693
120 OHM
RESISTOR
832-1693
120 OHM
RESISTOR
1
A
B
A
B
C (GND)
+13 VDC
RESET
C (GND)
+13 VDC
RESET
1
2
3
4
5
1
2
3
4
5
MOMENTARY
PUSH BUTTON
SWITCH
833-2729 DATA CONTROLBUS MODULE™
(MOUNTED ON CB 780/CB 784)
833-2727 REMOTE KEYBOARD DISPLAY MODULE
THREE WIRE SHIELDED CABLE MAY BE REQUIRED. TWO
832-1693 120 OHM TERMINATING RESISTORS ARE REQUIRED
FOR CONNECTIONS OVER 100 FEET. CABLE SHIELD MUST BE
TERMINATED TO EARTH GROUND AT BOTH ENDS. IF SHIELDED
CABLE IS NOT USED, TWISTED PAIR WIRE MUST BE USED.
WHEN CONNECTING THE KEYBOARD DISPLAY MODULE DATA
CONTROLBUS MODULE™, OR REMOTE RESET MODULE
EXTERNAL FROM THE CONTROL CABINET, APPROPRIATE
MEASURES MUST BE TAKEN TO MEET EN60730 SAFETY
LOW VOLTAGE REQURIEMENTS (SEE APPROVALS).
M28587A
3
3
3
TERMINALS ARE ON 5-WIRE CONNECTOR 203541.
