Honeywell 7800 SERIES Manual page 12

RM7890A,B,C
WIRING
Fig. 7—Wiring the RM7890A,B,C.
WHITE
YELLOW
1
2
3
4
5
6
65-0126—2
120V ALARM
5
BURNER
CONTROLLER/LIMITS
INTERMITTENT
PILOT/IGNITION
MAIN FUEL
VALVE(S)
IGNITION
RECTIFYING FLAME
ROD, RECTIFYING
PHOTOCELL, OR INFRA-
RED (LEAD SULFIDE)
FLAME DETECTOR
OR
C7027A, C7035A, OR
BLUE
C7044A ULTRAVIOLET
FLAME DETECTOR
6
OR
C7012A,C,E,F OR
BLUE
C7076A ULTRAVIOLET
FLAME DETECTOR
WHITE
WHITE
BLACK
BLACK
120V, 60 Hz 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 EXTERMAL 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 Q7800SUBBASE 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 EXTERMAL 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.
DO NOT USE NON-SELF CHECK ULTRAVIOLET FLAME DETECTORS WITH RM7890C.
Q7800
G 12
L2 13
3 (L1) 14
4 15
5
16
6 17
2
7
18
8 19
9 20
10 21
3
F
22
4
MASTER
SWITCH
FOR DIRECT SPARK IGNITION (OIL
OR GAS)
10
8
L2
9
L1
L2
12
L1
(HOT)
1
L2
IGNITION
TRANSFORMER
L2
MAIN VALVE
M9094