Honeywell 7800 Series Installation Instructions Manual page 14

RM7838B,C 7800 SERIES RELAY MODULE
L2
L1
(HOT)
MASTER
1
RECIRCULATING
SWITCH
BLOWER
BURNER
CONTROL
RECIRCULATING
AFS
START
120V, 50/60 HZ POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
1
2 SHUTTER CHECK FLAME DETECTION SYSTEM REQUIRED WHEN USING THE PILOT VALVE HOLD FUNCTION.
ALTERNATIVE WIRING FOR 4-20 MA SYSTEM.
3
SEE FLAME DETECTOR INSTALLATION INSTRUCTIONS FOR CORRECT WIRING.
4
ALARM SILENCING SWITCH NOT NEEDED FOR RM7838C APPLICATIONS.
5
Fig. 5. Wiring subbase for RM7838B,C with separate Start and Stop Stations (not the
32-00199—01
DPST ALARM
SILENCING SWITCH
120V ALARM
5
COMBUSTION
BLOWER AFS
COMBUSTION
BLOWER
STOP
LIMITS
INTERMITTENT/
10 SECOND
INTERRUPTED
PILOT/IGNITION
MAIN FUEL
VALVE(S)
5 SECOND IGNITION
(EARLY SPARK
TERMINATION)
FLAME DETECTOR
4
RM7838C1020/RM7838C2020).
14
SERIES 90
FIRING RATE
Q7800 SUBBASE
MOTOR
HIGH FIRE
G 12 B
COMMON
L2 R
13
LOW FIRE
3 14
W
MODULATE
4 (L1) 15
PILOT VALVE
5
16
HOLD
MANUAL VALVE
6 17
OPEN SWITCH
LOW FIRE
7 18
START SWITCH
HIGH PURGE
8
19
RATE SWITCH
PREIGNITION
9 20
INTERLOCK
10 21
22
F
SERIES 90
CONTROLLER
B
R
W
3
2
M7284 4-20 mA
FIRING RATE OUTPUT
MOTOR CONTROLLER
HIGH FIRE
F
COMMON
–
LOW FIRE
+
MODULATE
–
+
M15100C