Honeywell EC7830A Installation Instructions Manual page 6

EC7830, RM7830A,EC7850A,RM7850A 7800 SERIES RELAY MODULES
1 120 VAC, 50/60 HZ POWER SUPPLY, RM7850A; 220-240 VAC, 50/60 HZ POWER SUPPLY, EC7850A.
2
SEE FLAME DETECTOR INSTRUCTIONS FOR CORRECT WIRING.
EC/RM7850A Power Burner Full Modulation, GAS or OIL Sequence
LED
DISPLAY
INITIATE STANDBY
POWER
PILOT
FLAME
MAIN
ALARM
BURNER
OPERATING
CONTROLS
AND
INTERLOCKS
AFS CHK
FLAME
SAFE START CHECK
SIGNAL
MOD
HF
LF
MOTOR
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.
3 TAKE LOCKOUT ACTION. CONTINUE POSTPURGE TIMING.
4 SELECT VIA ST7800A PURGE TIMER CARD.
66-1092—2
Q7800
HIGH FIRE
G 12
COMMON
N 13
MODULATE
AL
3 14
LOW FIRE
(L1)
4 15
FAN 5 16
RT 6 17 ES2
LD2 7 18 ES1
PV1 ES3
8 19
MV 9 20 LOS
10 21
IGN PV2
F 22
2
FLAME
DETECTOR
DRIVE PURGE
DRIVE
OR PRE
TO HIGH
TO LOW
WAITING
FIRE IGNITION
FIRE
BURNER/BLOWER MOTOR
IGNITION
21
PREIGNITION INTERLOCK
LIMITS AND BURNER CONTROL CLOSED
LOCKOUT INPUT
1 10 sec 2
AIRFLOW SWITCH CHECK
19
HF Sw
HF
LF
4 5
3 sec
Fig. 4. Wiring subbase and sequence chart for EC/RM7850A.
SERIES 90
SERIES 90
FIRING RATE
CONTROLLER
MOTOR
B B
R R
W W
1
L1
N
FIRST MAIN
MAIN
SAFETY PILOT TRIAL
TIME STABIL. TIME STABIL.
5
10
PILOT VALVE 8
21
V2
MAIN VALVE
18
LF Switch
FLAME PROVING
6 6
5 sec
3 or 5 sec 5 sec 3 or 5 sec
5 DUE TO ONE EXTRA SECOND FOR SAFETY RELAY TEST,
TIMING CAN VARY FROM 3 TO 4 SEC.
6 SELECTION VIA CONFIGURATION JUMPERS OR MODEL NUMBERS.
6
LEGEND
AL ALARM
(NORMALLY OPEN)
LOW FIRE SWITCH
ES1
INPUT
PREIGNITION
ES2
INTERLOCK INPUT
HIGH FIRE SWITCH
ES3
INPUT
FAN BURNER/BLOWER
MOTOR
IGNITION
IGN
L1 LINE VOLTAGE SUPPLY
LOS LOCKOUT INPUT
LD2 AIRFLOW SWITCH INPUT
MAIN FUEL VALVE
MV
PV1 PILOT VALVE 1
(INTERRUPTED)
PV2 PILOT VALVE 2
(INTERMITTENT)
RT LIMITS AND BURNER
CONTROL
RUN
POSTPURGE STANDBY
9
6
20
3
7 AFS CHK
SAFE START CHECK
MOD
6
2, 15 or 30 sec
M15186B