Honeywell 7800 Series Manual page 20

RM7840E,G,L,M
OPERATION
Fig. 18—RM7840G sequence.
LED
DISPLAY
BURNER
OPERATING
CONTROLS
AND
INTERLOCKS
FLAME
SIGNAL
FIRING
RATE
MOTOR
Fig. 19—RM7840M sequence.
LED
DISPLAY
BURNER
OPERATING
CONTROLS
AND
INTERLOCKS
FLAME
SIGNAL
FIRING
RATE
MOTOR
00 00
INITIATE STANDBY PREPURGE
POWER POWER POWER
15/30 SEC. INTERRUPTED/INTERMITTENT PILOT VALVE
LIMITS AND BURNER CONTROLLER CLOSED
INTERLOCK CHECK
PREIGNITION INTERLOCK CLOSED
SAFE START CHECK
RM7800G SWITCHING
13 TO 12
MOTOR ACTION
00 00
INITIATE STANDBY PREPURGE
POWER POWER POWER
LIMITS AND BURNER CONTROLLER CLOSED
INTERLOCK CHECK RUNNING INTERLOCKS CLOSED
PREIGNITION INTERLOCK CLOSED
SAFE START CHECK
RM7840M SWITCHING
13
15
TO
MOTOR ACTION
RM7840G
00 10 20
PFEP
TIMED
PURGE 4 OR 10 SEC
MFEP
POWER POWER POWER
PILOT PILOT PILOT
FLAME FLAME FLAME
MAIN MAIN MAIN
ALARM ALARM
ALARM
BURNER/BLOWER MOTOR
10 IGN. 5 SEC.
10 SEC. IGN./PILOT
8
21
MAIN VALVE
L1
RUNNING INTERLOCKS CLOSED
6
4
TO
20
5 18
LOW FIRE SW. TO
FLAME PROVING
13 TO 14
RM7840M
00 10 20 25
TIMED PFEP
PURGE 4 OR 10 SEC
MFEP
POWER POWER POWER
PILOT PILOT PILOT
FLAME FLAME FLAME
MAIN MAIN MAIN
ALARM ALARM
ALARM
BURNER/BLOWER MOTOR
10 IGN. 5 SEC.
10 SEC. IGN./PILOT 8
INTERMITTENT PILOT VALVE
MAIN VALVE
L1
6 TO
4 TO 20
5 TO 18
LOW FIRE SW.
FLAME PROVING
20
25 40 00 15
RUN POSTPURGE STANDBY
POWER POWER POWER
PILOT
FLAME
MAIN
ALARM
5
9
TO 6
TO IC
7
PII
SSC
TO 15
13
13 TO 14
M3360
00 15
RUN POSTPURGE STANDBY
POWER POWER POWER
PILOT
FLAME
MAIN
ALARM
5
21
9
6
TO
IC
7
PII
SSC
13 TO 15
M3358