Honeywell 7800 Series Operating Instructions Manual page 8

4.2.3 Fig. 2. Wiring subbase and operating sequence chart
for RM/eC7890
L1
(HOT)
L2
1
MASTER
SWITCH
LED
INITIATE
DISPLAY
POWER
BURNER
START
OPERATING
CONTROLLER
AND LIMITS
FLAME
SIGNAL
120V, 50/60 HZ (RM7890) 220-240, 50/60 HZ (EC7890) POWER
1
SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
2
INSTALL A LINE VOLTAGE CONTROLLER IN SERIES WITH THE
LIMITS. IF USING A LOW VOLTAGE CONTROLLER IS
DESIRABLE, INSTALL AN EXTERNAL RELAY WITH THE N.O.
CONTACTS IN SERIES WITH THE LIMITS. THE LOW VOLTAGE
RELAY COIL WILL BE IN THE LOW VOLTAGE CONTROLLER
CIRCUIT. NOTE THAT IT MAY BE NECESSARY TO PROVIDE
AN EXTERNAL LOW VOLTAGE TRANSFORMER.
3 DO NOT CONNECT ANY WIRES TO UNUSED TERMINALS.
4 TERMINAL 22 IS ONLY ON THE RM/EC7890B.
WHEN USING RM/EC7890 A OR B IN A STANDING (CONTINUOUS)
5
PILOT APPLICATION; INSTALL AN EXTERNAL
RELAY TO SWITCH THE F LEAD. THE RELAY MUST HAVE
GOLD-CLAD OR GOLD-FLASH CONTACTS AND A LINE
VOLTAGE COIL. POWER THE RELAY COIL FROM THE Q7800
SUBBASE TERMINAL 8. CONNECT THE RELAY CONTACTS
BETWEEN THE F LEAD OF THE DETECTOR AND THE F
TERMINAL OF THE Q7800 SUBBASE.
G
L2
3 (L1)
LINE VOLTAGE
4
ALARM
5
2
BURNER
6
CONTROLLER/LIMITS
7
INTERMITTENT
8
PILOT/IGNITION
MAIN FUEL
9
VALVE(S)
10
IGNITION
F
FLAME DETECTOR
7 6
00 00
8
SAFE- PFEP
STANDBY
START 4 OR 10 SEC
POWER
POWER POWER
PILOT
FLAME
MAIN
ALARM
IGNITION
INTERMITTENT PILOT
LIMITS AND BURNER CONTROL CLOSED
SAFE START CHECK
6 USING EC7890, A 220-240 VAC TO 120 VAC, 10 VA MINIMUM
STEP-DOWN TRANSFORMER (NOT PROVIDED) MUST BE
USED TO DRIVE THE SHUTTER (C7012E,F; C7061; C7076A,D
DETECTORS). NOT APPLICABLE FOR C7061A1020, C7061A1079,
C7061F1003, C7061F1011-N
SEE FLAME DETECTOR SPECIFICATION FOR CORRECT WIRING.
7
8 RM7890A1031 PFEP IS 30 SECONDS FIXED. RM7890B1030 PFEP IS
10 SECONDS FIXED.
9 MAIN FUEL VALVE IS ENERGIZED AND IGNITION (TERMINAL 10) IS
TURNED OFF DURING PFEP ONCE FLAME IS PROVEN.
EXCEPTIONS:
RM7890A1031/A2031 HAS A FIXED 30 SECOND PFEP
RM7890B1030/B2030 HAS A FIXED 10 SECOND PFEP
RM7890A1064/A2064:
JR1 INTACT – 10 SECOND FIXED PFEP, IGNITION (TERMINAL 10)
SHUTS OFF AT 6 SECONDS.
JR1 CLIPPED – 4 SECONDS FIXED PFEP, IGNITION (TERMINAL 10)
SHUTS OFF AT 2 SECONDS.
Q7800
FOR DIRECT SPART IGNITION
12
(OIL OR GAS)
IGNITION
10
13
TRANSFORMER
14
8 MAIN VALVE
15
9
16
17
3
18
19
20
21
4
22
5
20
4/10
MFEP
RUN STANDBY
POWER POWER
POWER
PILOT PILOT
FLAME FLAME
MAIN MAIN
ALARM ALARM
10
9
8
MAIN VALVE 9 9
3 6
TO
FLAME PROVING
EN-8
L2
S S C