Honeywell 7800 Series Installation Instructions Manual page 5

L2
L1
1
Fig. 3. Internal block diagram of RM7898 (see Fig. 5 and 6 for detailed wiring instructions).
7. Recommended wire routing of leadwires:
a. Do not run high voltage ignition transformer wires
in the same conduit with the flame detector, Data
ControlBus™ Module, or Remote Reset Module
wiring.
b. Do not route flame detector, Data ControlBus™
Module, or Remote Reset Module leadwires in
conduit with line voltage circuits.
c. Enclose flame detector leadwires without armor
cable in metal cable or conduit.
RM7898A 7800 SERIES VALVE PROVING PRIMARY RELAY MODULES
AIRFLOW
DEMAND
LIMITS CONTROLLER
SWITCH
6
DEMAND
OR
17
VALVE PROVING
1
SWITCH
16
PILOT SELECT
19
DSI SELECT FOR
VP MODE
18
PREIGNITION
FLAME
INTERLOCK
DETECTOR
20
INTERNAL RELAY OPTO FEEDBACK
FIELD WIRING
INTERNAL WIRING
ALTERNATE CONNECTION IF VALVE PROVING BOTH, SPLIT OR AFTER ARE SELECTED.
INTERNAL
5
ELECTRONICS
3K
6K
7
1K
4K
2K
5K
2K
7K
F
PLUG IN
FLAME
AMPLIFIER
G
d. Follow directions in flame detector, Data
ControlBus™ Module, or Remote Reset Module
Instructions.
8. The KDM is powered from a low voltage, energy lim-
ited source. It can be mounted outside of a control
panel if it is protected from mechanical damage.
NOTE: A 13 Vdc power supply must be used any time
more than one KDM is used.
5
L2
3
ALARM
4
BLOWER
PILOT
8
VALVE
MAIN
9
VALVE 1
10 IGNITION
MAIN
21
VALVE 2
DETECTOR
22
SHUTTER
M23870A
32-00209—03