Honeywell 7800 Series Installation Instructions Manual page 7

120V ALARM
BURNER MOTOR
(BLOWER)
BURNER
CONTROLLER/LIMITS
LOCKOUT INTERLOCKS
(INC. AIR FLOW SWITCH)
10 SEC. INTERRUPTED
PILOT/IGNITION
MAIN FUEL VALVE(S)
FLAME DETECTOR
INITIATE
(INITIAL
00
POWERUP
ONLY)
STANDBY
POWER POWER
LED
DISPLAY
BURNER
OPERATING
CONTROLS
AND
INTERLOCK. CHECK
INTERLOCKS
PREIGNITION INTERLOCK CLOSED
FLAME
SAFE START CHECK
SIGNAL
FIRING
RATE
MOTOR
Fig. 2. Wiring subbase and sequence for RM7845A.
SERIES 90
FIRING RATE
Q7800
MOTOR
HIGH FIRE
G 12
COMMON
L2
13
LOW FIRE
14 W
3
MODULATE
4 15
(L1)
5 16
6 17
2
LOW FIRE
7 18
START SWITCH
HIGH FIRE
8
19
PURGE SWITCH
9 20
PREIGNITION
INTERLOCK
10 21
22
F
MASTER
SWITCH
RM7845
PREPURGE PREPURGE
HOLD HOLD
00 00 00
TIMED
DRIVE TO DRIVE TO
PREPURGE
HIGH FIRE LOW FIRE
POWER POWER POWER
PILOT PILOT
FLAME FLAME
MAIN MAIN
ALARM ALARM
BURNER/BLOWER MOTOR
LIMITS AND BURNER CONTROLLER CLOSED
LOCKOUT INTERLOCKS CLOSED
4 TO 20
5 TO 19 HIGH FIRE SW.
SWITCHING
13 12
TO
MOTOR ACTION
7
RM7845A 7800 SERIES RELAY MODULES
SERIES 90
CONTROLLER
B
B
R R
W
1 120V, 50/60 Hz POWER SUPPLY. PROVIDE
DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
2
DO NOT WIRE TO ANY UNUSED TERMINALS.
L1
(HOT)
1
L2
PFEP
10 SEC.
10 20 00
(4 SEC. IF
JR1 CLIPPED
MFEP RUN
POWER POWER POWER
PILOT PILOT
PILOT
FLAME FLAME
FLAME
MAIN MAIN
MAIN
ALARM ALARM ALARM
5
10 SEC. IGN./PILOT 8
9
MAIN VALVE
TO
L1 6
6
TO 7
5 18
LOW FIRE SW. TO
FLAME PROVING
13 15
TO
13 TO 14
M22186
15
POSTPURGE STANDBY
POWER POWER
IC
PII
SSC
TO
13 14
M22187
66-1147—1