Honeywell 7800 Series Installation Instructions Manual page 7

1 12O VAC, 50/60 Hz POWER SUPPLY (RM7830A). 220-240 VAC, 50/60 Hz POWER SUPPLY
2
EC/RM7830A Power Burner ON/OFF, GAS or OIL Sequence
LED
DISPLAY
INITIATE STANDBY
POWER
PILOT
FLAME
MAIN
ALARM
BURNER
OPERATING
PREIGNITION INTERLOCK
CONTROLS
AND
INTERLOCKS
AFS CHK
FLAME
SAFE START CHECK
SIGNAL
2 sec AFS CHK
OPTIONS
1 IF ON AT CALL FOR HEAT, HOLD (120 sec). LOCK OUT IF STILL ON.
2 IF OFF AFTER 10 SEC OF FAN, LOCK OUT.
TAKE LOCKOUT ACTION, CONTINUE POSTPURGE TIMING.
3
EC7830A, RM7830A, EC7850A, RM7850A 7800 SERIES RELAY MODULES
Q7800
G 12
N 13
AL
3 14
FAN 4 15
(L1)
5 16
RT 6 17
7 18
LD2
PV1
8 19
MV 9 20
10 21
IGN
F 22
2
FLAME
DETECTOR
(EC7830A). PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
SEE FLAME DETECTOR INSTRUCTIONS FOR CORRECT WIRING.
"PREPURGE" PRE FIRST SAFETY
WAITING IGNITION
BURNER/BLOWER MOTOR
IGNITION
17
LIMITS AND BURNER CONTROL CLOSED
LOCKOUT INPUT
1 2
10 sec
AIRFLOW SWITCH CHECK
4
5
3 sec
3 or 5 sec
4
5
6
Fig. 4. Wiring subbase and sequence chart for EC/RM7830A.
AL
ES2
FAN
IGN
L1
LOS
ES2 LD2
MV
PV1
PV2
LOS
RT
PV2
1
L1
N
PILOT
MAIN TRIAL
STABIL.
TIME TIME
4
10
8
PILOT VALVE
21
V2
FLAME PROVING
6 6
5 sec
3 or 5 sec
SELECT VIA ST7800A PURGE TIMER CARD.
DUE TO ONE EXTRA SECOND FOR SAFETY RELAY TEST, TIMING CAN VARY FROM 3 TO 4 SECONDS.
SELECT VIA CONFIGURATION JUMPERS OR MODEL NUMBERS.
7
LEGEND
ALARM
(NORMALLY OPEN)
PREIGNITION
INTERLOCK INPUT
BURNER/BLOWER
MOTOR
IGNITION
LINE VOLTAGE SUPPLY
LOCKOUT INPUT
AIRFLOW SWITCH INPUT
MAIN FUEL VALVE
PILOT VALVE 1
(INTERRUPTED)
PILOT VALVE 2
(INTERMITTENT)
LIMITS AND BURNER
CONTROL
MAIN
STABIL.
RUN
POSTPURGE
9
MAIN VALVE
6
20
7
SAFE START CHECK
6
5 sec 2, 15 or 30 sec
STANDBY
3
AFS CHK
M15185B
32-00198—01