Honeywell RM7800G User Manual
Page 9
RM7800E,G,L,M; RM7840E,G,L,M 7800 SERIES RELAY MODULES
9
66-1085—04
Fig. 4. Wiring subbase and sequence for RM7800M/RM7840M.
M12262A
G
L2
3
4
5
6
7
8
9
10
F
(L1)
13
14
15
16
17
18
19
20
21
22
12
MASTER
SWITCH
LOW FIRE
START SWITCH
5 SECOND IGNITION
(EARLY SPARK
TERMINATION)
MAIN FUEL VALVE(S)
BURNER
CONTROLLER/LIMITS
BURNER MOTOR
(BLOWER)
COMMON
MODULATE
120V ALARM
10 SEC. INTERRUPTED
PILOT/IGNITION
PREIGNITION
INTERLOCK
FLAME DETECTOR
120V, 50/60 Hz POWER SUPPLY. PROVIDE
DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
WHEN NO DAMPER MOTOR OR LOWFIRE
SWITCH IS USED, JUMPER TERMINAL 14
TO TERMINAL 18. DO NOT WIRE TERMINAL 15.
DO NOT WIRE TO ANY UNUSED TERMINALS.
SEE FLAME DETECTOR INSTALLATION
INSTRUCTIONS FOR CORRECT WIRING.
FOR DIRECT SPARK IGNITION
(OIL OR GAS)
IGNITION
TRANSFORMER
2ND STAGE
FUEL VALVE
(OPTIONAL)
L1
(HOT)
L2
1
21
9
10
1ST STAGE
FUEL VALVE
L2
Q7800
3
INTERMITTENT
PILOT
2
1
3
4
4
RUNNING INTERLOCKS
(INC. AIR FLOW SWITCH)
2
2
2
DAMPER
MOTOR
RM7800M/RM7840M
POWER
OPERATING
CONTROLS
AND
INTERLOCKS
BURNER
FLAME
SIGNAL
DAMPER
MOTOR
INITIATE
(INITIAL
POWERUP
ONLY)
POWER
STANDBY
PREPURGE
HOLD
DRIVE TO
LOW FIRE
POWER
PILOT
FLAME
MAIN
POWER
PFEP
10 SEC.
(4 SEC. IF
JR1 CLIPPED
PILOT
FLAME
MAIN
POWER
MFEP
PILOT
FLAME
MAIN
RUN
POWER
POSTPURGE
POWER
STANDBY
00
00
10
25
00
15
20
MOTOR ACTION
BURNER/BLOWER MOTOR
IGN.
INTERMITTENT PILOT VALVE
LIMITS AND BURNER CONTROLLER CLOSED
RUNNING INTERLOCKS CLOSED
PREIGNITION INTERLOCK CLOSED
LOW FIRE SW.
SAFE START CHECK
FLAME PROVING
10 SEC. IGN./PILOT 8
10
5
5 SEC.
21
6
TO
7
TO
20
TO
5
18
TO
13
15
TO
13
15
TO
M12265A
INTERLOCK. CHECK
4
6
L1
MAIN VALVE
9
TIMED
PREPURGE
POWER
FLAME
MAIN
PILOT
ALARM
POWER
FLAME
MAIN
PILOT
ALARM
ALARM
ALARM
ALARM
00
IC
PII
SSC
LED
DISPLAY
RM7800M/7840M SWITCHING