7800 SERIES EC7890A,B/RM7890A,B RELAY MODULE
65-0204–1
12
Fig. 7. Wiring the RM7890A,B.
M11194
G
L2
3
5
6
7
8
9
10
F
(L1)
13
14
15
16
17
18
19
20
21
22
12
MASTER
SWITCH
IGNITION
MAIN FUEL
VALVE(S)
BURNER
CONTROLLER/LIMITS
100 VAC
ALARM
INTERMITTENT
PILOT/IGNITION
RECTIFYING FLAME
ROD, RECTIFYING
PHOTOCELL, OR INFRA-
RED (LEAD SULFIDE)
FLAME DETECTOR
C7027A, C7035A, OR
C7044A ULTRAVIOLET
FLAME DETECTOR
C7012A,C,E,F OR
C7076A ULTRAVIOLET
FLAME DETECTOR
100V, 50/60 HZ (RM7890) POWER SUPPLY. PROVIDE DISCONNECT
MEANS AND OVERLOAD PROTECTION AS REQUIRED.
DO NOT CONNECT ANY WIRES TO UNUSED TERMINALS.
TERMINAL 22 IS ONLY ON THE RM7890B.
FOR A CONTINUOUS OR STANDING PILOT, INSTALL AN EXTERNAL RELAY TO SWITCH THE F LEAD. THE
RELAY MUST HAVE GOLD-CLAD OR GOLD-FLASH CONTACTS AND A 120 VAC 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. THE R4222N1002 OR R4222V1002 RELAY IS
ACCEPTABLE TO USE IN THIS TYPE OF APPLICATION. USE THE N.O. PILOT DUTY CONTACTS.
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.
FOR DIRECT SPARK IGNITION (OIL
OR GAS)
L1
(HOT)
L2
1
OR
OR
BLUE
BLUE
WHITE
YELLOW
WHITE
WHITE
BLACK
BLACK
9
8
10
IGNITION
TRANSFORMER
MAIN VALVE
1
Q7800
2
2
3
3
5
4
L2
4
5
4
C7061
