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R7140G,L,M BURNER CONTROL MODULES
19 66-1153—03
Fig. 14. Operating sequence, R7140M.
R7140M
POWER
OPERATING
CONTROLS
AND
INTERLOCKS
BURNER
FLAME
SIGNAL
DAMPER
MOTOR
INITIATE
(INITIAL
POWERUP
ONLY)
POWER
STANDBY
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
MOTOR ACTION
BURNER/BLOWER MOTOR
IGN.
INTERMITTENT PILOT VALVE
LIMITS AND BURNER CONTROLLER CLOSED
RUNNING INTERLOCKS CLOSED
PII CLOSED
LOW FIRE SW.
SAFE START CHECK FLAME PROVING
10 SEC. IGN./PILOT
5
18
8
5 SEC.
6
4
TO
3TO
16TO
8
13
TO
11 12
TO
10 12
TO
M23331B
4
16
L1
MAIN VALVE
7
TIMED
PREPURGE
POWER
FLAME
MAIN
PILOT
ALARM
POWER
FLAME
MAIN
PILOT
ALARMALARMALARMALARM
00
SSC
LED
DISPLAY
R7140M SWITCHING
1
1
WHEN USING A SPRING RETURN ACTUATOR MOTOR, REMOVE J1 AND J2 JUMPERS LOCATED ON R7140M SUBBASE.
2
2
PII MEANS PRE-IGNITION INTERLOCK.
R7140M WHEN USED AS BC7000 REPLACEMENT ON R4140 WITH START INTERLOCKS L1 TO 16.
3
3
3
11 14
TO
11 14
TO