Honeywell 7800 Series Installation Instructions Manual page 4

7800 SERIES RELAY MODULES
d. Do not route flame detector, Data ControlBus
Module™ or remote reset module leadwires in
conduit with line voltage circuits.
e. Enclose flame detector leadwires without armor
cable in metal cable or conduit.
4
RESET
PUSHBUTTON
STATUS LEDs
DDL
DDL
COMMUNICATIONS
1 PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED
2 S7800 INCLUDED WITH RM7838A.
COMBUSTION BLOWER OR EXHAUST RECIRCULATING FANS.
3
Fig. 2. Internal block diagram of the RM7838A (see Fig. 2 for detailed wiring instructions).
5. For recommended wire size and type, see Table 1.
6. For recommended grounding practices, see Table 2.
32-00213—01
L1
L2
BURNER
1
(HOT)
CONTROL
120 Vac
50/60 Hz
FAN
3
CONFIGURATION
JUMPERS
MICROCOMPUTER
RELAY
DRIVE
CIRCUIT
SAFETY RELAY
CIRCUIT
6
RUNNING/
LOCKOUT
INTERLOCK
LIMITS
7
HIGH FIRE SWITCH
19
3K1
2
KEYBOARD
DISPLAY MODULE
RS485
1
5
2
REMOTE
3
RESET
f. Follow directions in flame detector, Data Control-
Bus Module™ or remote reset module instruc-
tions.
PLUG-IN PURGE
TIMER CARD
FLAME SIGNAL
PLUG-IN
FLAME
AMPLIFIER
TEST
2K
3K
4K
5K
RELAY
6K
STATUS
7K FEEDBACK
AND LINE
8K
VOLTAGE
9K
INPUTS
1K
CONTROL
POWER SUPPLY
POWER
1K1
8
LOW FIRE
SWITCH
1K1
2K1 5K1
10
7K1
21
2K2
9
3
ALARM
SILENCING
RELAY (DPST)
7. For keyboard display module (KDM). The KDM is
powered from a low voltage, energy-limited source.
It can be mounted outside of a control panel if it is
protected from mechanical damage.
4
L2
TEST
JACK
F
G
22
PILOT
S445A
START
C D IGNITION
A
B
STOP
MAIN VALVE(S)
ALARM
INDICATES FEEDBACK SENSING
OF RELAY CONTACT STATUS
AND LINE VOLT INPUTS
FIELD WIRING
INTERNAL WIRING
M5120C