Greenheck 7800 Series Relay Modules User Manual
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4
RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D 7800 SERIES RELAY MODULES
66-1090—2
Fig. 2. Wiring subbase and sequence chart for RM7895A,B/EC7895A; RM7896A,B.
M15123A
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)
INTERMITTENT
PILOT/IGNITION
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.
FOR DIRECT SPARK IGNITION
(OIL OR GAS)
LINE VOLTAGE ALARM
L1
(HOT)
L2
1
8
10
IGNITION
TRANSFORMER
MAIN VALVE
1
Q7800
2
2
L2
4
LOCKOUT INTERLOCK
(INCLUDING
AIRFLOW SWITCH)
FLAME DETECTOR
IGN
AIRFLOW SW CHECK
OPERATING
CONTROLS
AND
INTERLOCKS
INITIATE
ALARM
ALARM
STANDBY
POWER
POWER
PILOT
FLAME
MAIN
TIMED
PURGE
ALARM
POWER
PILOT
FLAME
MAIN
RUN
STANDBY
BURNER
START
MAIN VALVE
LIMITS AND BURNER CONTROLLER CLOSED
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.
FOR RM7895A1048 (ONLY), IGNITION TERMINAL 10
IS DE-ENERGIZED WHEN FLAME IS PROVEN.
AIRFLOW SWITCH CHECK FEATURE IS FOR THE RM7895B,RM7896B.
RM7896A,B ONLY.
00
00
00
10
L1 TO 6
9
8
4
BURNER/BLOWER MOTOR
LOCKOUT INTERLOCK CLOSED
AFSC
TO
7
6
4
3
5
3
4
5
6
7
POST PURGE
15 SEC
POWER
6
7
7