Greenheck 7800 Series Relay Modules - Manual (Page 5)

RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D 7800 SERIES RELAY MODULES
5 66-1090—2
Fig. 3. Wiring subbase and sequence chart for RM7895C,D/EC7895C,D; RM7896C,D.
G
L2
3
5
6
7
8
9
10
F
(L1)
13
14
15
16
17
18
19
20
21
22
12
MASTER
SWITCH
IGNITION
MAIN FUEL VALVE(S)
BURNER
CONTROLLER/LIMITS
BURNER MOTOR
(BLOWER)
10 SEC. INTERRUPTED
PILOT/IGNITION
FOR DIRECT SPARK IGNITION
(OIL OR GAS)
DELAYED
(2ND STAGE)
MAIN VALVE
LINE VOLTAGE
ALARM
L1
(HOT)
L2
1
8
9
10
IGNITION
TRANSFORMER
MAIN VALVE
Q7800
2
L2
4
LOCKOUT INTERLOCK
(INCLUDING
AIRFLOW SWITCH).
FLAME DETECTOR
4
3
M15124A
RM7895, RM7896: 120 VAC , 50/60 HZ; EC7895: 220-240 VAC,
50/60 HZ POWER SUPPLY. PROVIDE DISCONNECT
MEANS AND OVERLOAD PROTECTION AS REQUIRED.
DO NOT CONNECT ANY WIRES TO UNUSED TERMINALS.
FOR EC7895, A 220 TO 240 VAC TO 120 VAC, 10 VA MINIMUM STEPDOWN
TRANSFORMER (NOT PROVIDED) MUST BE USED TO DRIVE THE SHUTTER.
1
2
IGN.
AIRFLOW SW. CHECK
OPERATING
CONTROLS
AND
INTERLOCKS
INITIATE
ALARM ALARM
STANDBY
POWER POWER
PILOT
FLAME
MAIN
TIMED
PURGE
ALARM
POWER
PILOT
FLAME
MAIN
ALARM
POWER
PILOT
FLAME
MAIN
RUN STANDBY
BURNER
START
MAIN VALVE
LIMITS AND BURNER CONTROLLER CLOSED
10 SEC. IGN./ PILOT
SAFE START CHECK FLAME PROVING SSC
LED
DISPLAY
POWER
PILOT
FLAME
MAIN
PFEP
4 OR 10 SEC
POWER
START
POWER POWER
FLAME
SIGNAL
SEE FLAME DETECTOR SPECIFICATIONS FOR CORRECT WIRING.
AIRFLOW SWITCH CHECK FEATURE IS FOR THE RM7895D, RM7896D.
RM7896C,D ONLY.
00 00 00
10
L1 TO 6
9
8
4 BURNER/BLOWER MOTOR
LOCKOUT INTERLOCK CLOSED AFSC TO 7 6
3
4
5
6
POST PURGE
15SEC
POWER
6
6
5
MFEP
21 2ND STAGE MAIN