Honeywell 7800 Series Installation Instructions Manual page 13

L2
L1
(HOT)
MASTER
RECIRCULATING
1
SWITCH
BLOWER
BURNER
CONTROL
RECIRCULATING
AFS
1
120V, 50/60 HZ POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
2
SHUTTER CHECK FLAME DETECTION SYSTEM REQUIRED WHEN USING THE PILOT VALVE HOLD FUNCTION.
SEE FLAME DETECTOR INSTALLATION INSTRUCTIONS FOR CORRECT WIRING.
3
15 SECOND FOR RM7838C.
4
ALARM SILENCING SWITCH NOT NEEDED FOR RM7838C APPLICATIONS.
5
Fig. 4. Wiring subbase for RM7838B,C with S445 Start-Stop Station (not the RM7838C1020/RM7838C2020).
DPST ALARM
SILENCING SWITCH
120V ALARM
5
COMBUSTION
BLOWER AFS
COMBUSTION
S445
AIR FAN
STOP
A LIMITS
B
START
D C
INTERMITTENT/
4
10 SECOND
INTERRUPTED
PILOT/IGNITION
MAIN FUELVALVE(S)
5 SECOND IGNITION
(EARLY SPARK
TERMINATION)
FLAME DETECTOR
3
13
RM7838B,C 7800 SERIES RELAY MODULE
SERIES 90
FIRING RATE
Q7800 SUBBASE
MOTOR
HIGH FIRE
G 12 B
COMMON
L2
13 R
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
2
M15101D
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