Honeywell 7800 Series Installation Manual page 7

S445A
START-STOP
STATION
STOP
A
B
INTERNAL
JUMPER
D C
START
IGNITION
FOR DIRECT SPARK IGNITION
(OIL OR GAS)
8
MAIN VALVE
9
LED
INITIATE
DISPLAY
POWER
POWER
PILOT
FLAME
MAIN
ALARM
BURNER
START
LIMITS, STOP
STATION AND
SILENCING SWITCH
FLAME
SIGNAL
1 RM7785A: 120 VAC, 50/60 HZ; EC7885A: 220-240 VAC, 50/60 HZ POWER SUPPLY.
PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2
DO NOT CONNECT ANY WIRES TO UNUSED TERMINALS.
3 SEE FLAME DETECTOR SPECIFICATION FOR CORRECT WIRING.
4 220-240 VAC TO 120 VAC, 10 VA MINIMUM STEP-DOWN TRANSFORMER
(NOT PROVIDED) REQUIRED TO DRIVE SHUTTER (EC7885A ONLY).
5 MAIN FUEL VALVE WILL BE ENERGIZED WHEN FLAME IS PROVEN.
Fig. 3. Wiring subbase and sequence chart for RM7885A.
DPST ALARM
SILENCING
SWITCH
ALARM
INTERMITTENT
PILOT
MAIN FUEL
VALVE(S)
FLAME DETECTOR
3
L2
4
EC/RM7885
00 00
SAFE-
STANDBY START PFEP
POWER POWER POWER
PILOT
FLAME
MAIN
ALARM
START SWITCH
INTERMITTENT PILOT
LIMITS, STOP STATION AND ALARM SILENCING SWITCH CLOSED
SAFE START CHECK
7
RM7885A 7800 SERIES RELAY MODULES
Q7800
G 12
L2 13
3 (L1) 14
4 15
5
16
6 17
LIMITS
7
18
8 19
9 20
10 21
F
22
15 MINUTES
RUN STANDBY
POWER
PILOT
FLAME
MAIN
10
8
MAIN VALVE
9
5
FLAME PROVING
2
L1
(HOT)
L2
MASTER
SWITCH
1
POWER
ALARM
L1 TO 6
M15109A
32-00215—01