Honeywell 7800 Series Manual page 25

Fig. 24—RM7800E,L sequence.
VFD
DISPLAY INITIATE
POWER
LED
DISPLAY
BURNER
OPERATING
CONTROLS
AND
INTERLOCK CHECK
INTERLOCKS
1
FLAME
SIGNAL
FIRING
RATE
MOTOR
1
FOR THE RM7800E: THE HIGH FIRE SWITCH MUST BE WIRED CORRECTLY TO PERFORM ENERGY SAVING PURGE
FUNCTIONS. THE BURNER/BLOWER MOTOR DOES NOT START UNTIL THE HIGH FIRE SWITCH HAS BEEN MADE.
Fig. 25—RM7800G sequence.
VFD
DISPLAY
INITIATE
POWER
LED
DISPLAY
BURNER
OPERATING
CONTROLS
AND
INTERLOCK CHECK
INTERLOCKS
FLAME
SIGNAL
FIRING
RATE
MOTOR
PREPURGE PREPURGE
00
00 00
DRIVE TO TIMED
HIGH FIRE PURGE
STANDBY
POWER POWER POWER
PILOT
FLAME
MAIN
ALARM
BURNER/BLOWER MOTOR
1
LIMITS AND BURNER CONTROLLER CLOSED
LOCKOUT INTERLOCKS CLOSED
PREIGNITION INTERLOCK CLOSED
5 TO 19 HIGH FIRE SW.
SAFE START CHECK
RM7800E,L SWITCHING
13 12
TO
MOTOR ACTION
RM7800G
00 00
TIMED
STANDBY PREPURGE PURGE
POWER POWER POWER
PILOT
FLAME
MAIN
ALARM
BURNER/BLOWER MOTOR
15/30 SEC. INTERRUPTED/INTERMITTENT PILOT VALVE
LIMITS AND BURNER CONTROLLER CLOSED
RUNNING INTERLOCKS CLOSED
PREIGNITION INTERLOCK CLOSED
SAFE START CHECK
RM7800G SWITCHING
13 TO 12
MOTOR ACTION
RM7800E,L
00 10 20 25
DRIVE TO
PFEP
LOW FIRE
4 OR 10 SEC MFEP
POWER
POWER POWER
PILOT PILOT PILOT
FLAME FLAME
FLAME
MAIN MAIN
MAIN
ALARM ALARM ALARM
5
10 IGN.
5 SEC.
10 SEC. IGN./PILOT 8
15 SEC. PILOT 21
MAIN VALVE
L1 6
TO
6
TO 7
4 TO
20
5 18
LOW FIRE SW. TO
FLAME PROVING
13
13 14
TO
00 10 20 25 40
PFEP
4 OR 10 SEC
MFEP RUN
POWER POWER POWER
PILOT PILOT PILOT
FLAME FLAME FLAME
MAIN MAIN MAIN
ALARM ALARM ALARM
5
10 IGN. 5 SEC.
10 SEC. IGN./PILOT
8
21
MAIN VALVE 9
L1 TO 6
TO
6 7
4
TO
20
5 18
LOW FIRE SW. TO
FLAME PROVING
TO 15
13
13 TO 14
25
RM7800E,G,L,M
00 15
POSTPURGE
RUN STANDBY
POWER POWER POWER
PILOT
FLAME
MAIN
ALARM
9
IC
PII
SSC
15
TO
13 TO 14
M1928E
00 15
POSTPURGE STANDBY
POWER POWER
IC
PII
SCC
TO
13 14
M1929E
65-0117—2
OPERATION