Fig. 10-Rm7838B Wiring With Separate Start And Stop Stations With 4 To 20 Ma Firing Rate Control Circuit - Honeywell 7800 Series Manual

RM7838B
INSTALLATION
Fig. 10—RM7838B wiring with separate start and stop stations with 4 to 20 mA firing rate control circuit.
L2
L1
(HOT)
MASTER
1
SWITCH
BURNER
CONTROL
65-0120—1
RECIRCULATING
EXHAUST
BLOWER
120V ALARM
RECIRCULATING
COMBUSTION
AFS
BLOWER AFS
STOP
RECTIFYING FLAME ROD,
RECTIFYING PHOTOCELL,
OR INFRARED
(LEAD SULFIDE)
FLAME DETECTOR
C7027A, C7035A OR
WHITE
C7044A ULTRAVIOLET
FLAME DETECTOR
C7012A, C, E, F OR
YELLOW
C7076A, D ULTRAVIOLET
FLAME DETECTOR
START
1 120V, 60 HZ POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
Q7800 SUBBASE
G
L2
DPST ALARM
SILENCING SWITCH
3
4
(L1)
COMBUSTION
5
BLOWER
LIMITS 6
7
10 SEC.
INTERRUPTED
PILOT/IGNITION
8
MAIN FUEL
VALVE(S) 9
5 SECOND IGNITION
10
(EARLY SPARK
TERMINATION)
F
OR
BLUE
OR
BLUE
WHITE
WHITE
L2
BLACK
L1
BLACK
L2
18
M7284
4-20 mA
FIRING RATE
OUTPUT
MOTOR CONTROLLER
HIGH FIRE
12 F
COMMON
-
13
LOW FIRE
+
14
MODULATE
15
PILOT VALVE
16
HOLD
MANUAL VALVE
17
OPEN SWITCH
LOW FIRE
18
START SWITCH
HIGH PURGE
19
RATE SWITCH
PREIGNITION
20
INTERLOCK
21
22
-
+
M9737