CleaverBrooks CB780E User Manual

CB780E/CB784E RELAY MODULES WITH VALVE PROVING
750-234 13 32-00150—03
Fig. 8. Typical wiring subbase and sequence for the CB780E/CB784E, without Valve Proving.
M23945A
G
L2
3
4
5
6
7
8
9
10
F
(L1)
13
14
15
16
17
18
19
20
21
22
12
LOCKOUT INTERLOCKS
(INC. AIR FLOW SWITCH)
MASTER
SWITCH
LOW FIRE
START SWITCH
5 SECOND IGNITION
(EARLY SPARK
TERMINATION)
MAIN FUEL VALVE(S)
BURNER
CONTROLLER/LIMITS
BURNER MOTOR
(BLOWER)
HIGH FIRE
COMMON
LOW FIRE
MODULATE
120V ALARM
10 SEC. INTERRUPTED
PILOT/IGNITION
PREIGNITION
INTERLOCK
SERIES 90
FIRING RATE
MOTOR
SERIES 90
CONTROLLER
FLAME DETECTOR
120V, 50/60 Hz (EC7840L 220-240 VAC) POWER SUPPLY.
PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
DO NOT WIRE TO ANY UNUSED TERMINALS.
SEE FLAME DETECTOR INSTALLATION INSTRUCTIONS
FOR CORRECT WIRING.
FOR DIRECT SPARK IGNITION (OIL
OR GAS)
IGNITION
TRANSFORMER
2ND STAGE
FUEL VALVE
(OPTIONAL)
R
W
B
R
W
B
L1
(HOT)
L2
1
8
9
10
L2
833-2725
15 SEC.
INTERRUPTED
PILOT VALVE
2
1
3
3
HIGH FIRE
PURGE SWITCH
2
POWER
00
OPERATING
CONTROLS
AND
INTERLOCKS
BURNER
FLAME
SIGNAL
FIRING
RATE
MOTOR
INITIATE
(INITIAL
POWERUP
ONLY)
POWER
STANDBY
POWER
PREPURGE
HOLD
DRIVE TO
HIGH FIRE
PREPURGE
HOLD
DRIVE TO
LOW FIRE
POWER
PILOT
FLAME
MAIN
POWER
PFEP
10 SEC.
(4 SEC. IF
JR1
CLIPPED
PILOT
FLAME
MAIN
POWER
MFEP
PILOT
FLAME
MAIN
RUN
POWER
POSTPURGE
POWER
STANDBY
00 00 10 25 00 1520
SWITCHING
MOTOR ACTION
BURNER/BLOWER MOTOR
IGN.
15 SEC. PILOT
LIMITS AND BURNER CONTROLLER CLOSED
LOCKOUT INTERLOCKS CLOSED
PREIGNITION INTERLOCK CLOSED
LOW FIRE SW.
SAFE START CHECK
FLAME PROVING
10 SEC. IGN./PILOT
8
10
5
5 SEC.
21
6
TO
7TO
20TO
5
18
TO
13 15
TO
13 12
TO
M23946A
INTERLOCK. CHECK
HIGH FIRE SW. 19TO
13 14
TO
13 14
TO
5
4
6
L1
MAIN VALVE
9
NOTE: SEE APPENDIX FOR APPLICATION OPTIONS.
TIMED
PREPURGE
POWER
FLAME
MAIN
PILOT
ALARM
POWER
FLAME
MAIN
PILOT
ALARMALARMALARMALARM
00
IC
PII
SSC
LED
DISPLAY

CleaverBrooks CB780E Specifications

General

Brand	CleaverBrooks
Model	CB780E
Category	Control Unit
Language	English