Honeywell 7800 Series Installation Instructions Manual page 6

RM7838B, RM7838C 7800 SERIES RELAY MODULES
DDL
COMMUNICATIONS
RECIRCULATING
AFS
VALVE PROVING
SWITCH
LOW START
SWITCH
HIGH PURGE
RATE SWITCH
PREIGNITION
INTERLOCK
32-00211—01
BURNER CONTROL
4
RUN/TEST
SWITCH
RESET
PUSHBUTTON
SAFETY RELAY
CIRCUIT
STATUS LED
KEYBOARD
DISPLAY MODULE
DDL
RS485
1
2
REMOTE
3
RESET
LIMITS
STOP SWITCH
LOCKOUT INTERLOCKS
AND COMBUSTION AIR
BLOWER SWITCHES
16
18
19
20
START SWITCH
21
Fig. 3. Internal block diagram of RM7838B,C.
L1
1
(HOT) L2
120 Vac
50/60 HZ
RECIRCULATING
BLOWER
PLUG-IN PURGE
TIMER CARD
CONFIGURATION
JUMPERS
FLAME SIGNAL
MICROCOMPUTER
TEST
2K
3K
4K
RELAY
5K
DRIVE
CIRCUIT
7K
1K
POWER SUPPLY
6K1
1K1 2K1 5K1
4K1
2K2
6
3K1
7
7K
INDICATES FEEDBACK SENSING
OF RELAY CONTACT STATUS
AND LINE VOLT INPUTS
FIELD WIRING
INTERNAL WIRING
1 PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
2
AN ALARM SILENCING SWITCH MAY BE
NEEDED FOR RM7838B.
6
TEST
JACK
F
PLUG-IN
G
FLAME
AMPLIFIER
22
RELAY
STATUS
FEEDBACK
AND LINE
VOLTAGE
INPUTS
CONTROL
POWER
COMBUSTION
5
AIR BLOWER
10 IGNITION
PILOT
8
9 MAIN VALVE 1
2
3 ALARM
MAIN VALVE 2
17
HIGH PURGE
8K1
COMMON
8K2
MODULATE
9K1
9K2
LOW FIRE
M22661B
L2
12
13
15
14