Honeywell 7800 Series Installation Instructions Manual page 9

Q7800
G
N
AL
3
4
FAN
(L1)
5
6
RT
7
LD2
PV1
8
9
MV
10
IGN
F
8
FLAME
DETECTOR
EC7820A Atmospheric + Fan Relay Module with Option for Modulation
LED
DISPLAY
INITIATE STANDBY
POWER POWER POWER
PILOT
FLAME
MAIN
ALARM
BURNER
OPERATING
CONTROLS
AND
INTERLOCKS
1
AFS CHK
FLAME
SAFE START CHECK
SIGNAL
FREE
NO
FOR
MODULATION
2 s e c AFS CHK
OPTIONS
NOTE: IGNITION ATTEMPTS: 1 OR 3
FOR 3: IF NO FLAME, RECYCLE TO WAITING PERIOD; LOCK OUT AFTER 3 TRIES.
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 15 SEC
POSTPURGE TIMING
4
SELECT VIA ST7800A PURGE TIMER CARD
5
SELECT VIA CONFIGURATION JUMPERS OR MODEL NUMBERS
Fig. 3. Wiring subbase and operation sequence for EC7820A Relay Module.
12
FIRING RATE
MOTOR
COMMON
13
MODULATE
14
15
16
17
ES2
18
ES1
19
20
LOS
21
PV2
22
7
"PREPURGE" PRE FIRST
WAITING IGNITION SAFETY TIME
POWER POWER
POWER
PILOT
FLAME
BURNER/BLOWER MOTOR
IGNITION
PILOT VALVE
V2
PREIGNITION INTERLOCK
LIMITS AND BURNER CONTROL CLOSED
LOCKOUT INPUT
10 sec 2
AIRFLOW SWITCH CLOSED
LF SWITCH
RETRY
COUNT < - 0
6 5
4 5 or 10 sec
3 s e c
6 DUE TO 1 EXTRA SECOND FOR SAFETY RELAY TEST,
TIMING WILL VARY FROM 3 TO 4 SECONDS.
7
220/230/240 VAC, 50/60 Hz POWER SUPPLY.
8
WHEN USING A C7061A OR C7076A,D SENSOR, A 220/240 VAC TO 120 VAC, 10 VA
STEP-DOWNTRANSFORMER MUST BE INSTALLED TO DRIVE THE SHUTTER.
REFER TO AMPLIFIER AND FLAME DETECTOR SPECIFICATIONS FOR
WIRING DETAILS. DOES NOT APPLY TO C7061A1020, C7061A1079 AND C7061F1003,
WHICH HAVE A SELECTABLE TERMINAL BLOCK TO CONNECT 220/240V
SHUTTER VOLTAGE DIRECTLY.
9
EC7820A 7800 SERIES RELAY MODULES
AL
CONTROLLER
ES1
B B
ES2
R R
FAN
W W
IGN
L1
LOS
LD2
MV
PV1
PV2
RT
L1
N
MAIN
MAIN TRIAL
PILOT
STABIL.
STABIL. TIME
POWER POWER
PILOT
PILOT
FLAME
FLAME
MAIN
MAIN VALVE
FLAME PROVING
5
IGNITION ATTEMPTS
5
5 sec 5 or 8 sec
LEGEND
ALARM
(NORMALLY OPEN)
LOW FIRE SWITCH
INPUT
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
RUN
STANDBY
POWER POWER
POWER
PILOT PILOT
FLAME FLAME
MAIN MAIN
5 sec
AFS CHK
SSC
RETRY
COUNT < - 0
YES
5 sec
M11630B
32-00197—01