Honeywell 7800 Series Installation Instructions Manual page 6

RM7838B,C 7800 SERIES RELAY MODULE
BURNER
CONTROL
RECIRCULATING
BLOWER
L2
Fig. 3. Internal block diagram of RM7838C1020/RM7838C2020 (see Fig. 6 for detailed wiring instructions).
32-00199—01
4
CONFIGURATION
JUMPERS
RUN/TEST
SWITCH
RESET
PUSHBUTTON
SAFETY RELAY
STATUS
CIRCUIT
LEDS
LFS
HFS
PII
3K2
16
COMBUSTION
BLOWER AFS
START
RECIRCULATING
BLOWER AFS
STOP
6K1
3K1
OPTIONAL KEYBOARD
DISPLAY MODULE
DDL
RS485
5
1
DDL
2
REMOTE
COMMUNICATIONS
3 RESET
1 120 VAC, 50/60 Hz POWER SUPPLY.
L1
HOT N
1
PLUG-IN PURGE
TIMER CARD
F L A M E S IG N A L
P L U G -IN
MICROCOMPUTER
F L A M E
A M P L IF IE R
2K
3K
4K
RELAY
DRIVE 5K
CIRCUIT
6K
7K
8K
9K
1 K
POWER SUPPLY
18
19
20
2K2 5K1
7
1K
4K1
21
2K1
6
HIGH FIRE
12
8K1
COMMON
13
8K2
LOW FIRE
15
9K1
9K2
MODULATE
14
6
TEST
JACK
F
U PLUG-IN
A FLAME
G
AMPLIFIER
SHUTTER
2 2
RELAY
STATUS
FEEDBACK
AND LINE
VOLTAGE
INPUTS
CONTROL
POWER
AL
IGN
10
PV1
8
MV
9
COMBUSTION
BLOWER
5
AL
3
INDICATES FEEDBACK SENSING
OF RELAY CONTACT STATUS
AND LINE VOLTAGE INPUTS
F G ... 22
USER TERMINALS
RELAY CONTACT OPEN
RELAY CONTACT CLOSED
RELAY COIL
FIELD WIRING
INTERNAL WIRING
M13959
2