Honeywell 7800 Series Installation Instructions Manual page 28

RM7888A 7800 SERIES RELAY MODULE
IGNITION- T10
PILOT- T8
MAIN- T9
AIR VALVE- T5
FLAME PROVEN- T21
ALARM- T3
MOTOR POSITION- T12-T15
@ LOW FIRE INPUT- T18
LIMITS COMPLETE- T7
SF1 SPECIAL FUNCTION- T6
SF2 SPECIAL FUNCTION- T17
SF3 SPECIAL FUNCTION- T19
SF4 SPECIAL FUNCTION- T20
FLAME SENSED
*RM7888A1001 AND A1019 ARE 4 SECONDS. RM7888A1027 IS 10 SECONDS.
32-00214—01
STANDBY NORMAL-
PART 1*
INPUT &
OUTPUT
SIGNALS
POSSIBLE
STANDBY-
INFINITE
PURGE
HOLD
POWER
POWER POWER
PILOT
PILOT
FLAME
FLAME
MAIN
ALARM
L/H/MOD L
Fig. 22. DSI Normal sequence timing diagram.
28
NORMAL- NORMAL-
PART 2 PART 3
5 SECONDS,
POSSIBLE
0 TO
INFINITE INFINITE
HOLD SECONDS
POWER
POWER
PILOT PILOT
FLAME FLAME
MAIN MAIN
L MOD OR LOW
TO STANDBY
TO END OF PART 1
M9498B