Wiring Subbase - Honeywell 7800 Series Installation Instructions Manual

Wiring Subbase

WARNING
Electrical Shock Hazard.
Can cause severe injury, death or equipment
damage.
Disconnect the power supply before beginning
installation. More than one disconnect may be
required.
The internal block diagram of the RM7897A,C is shown in Fig.
1.
1 PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
2
RM7897A-INTERMITTENT PILOT.
RM7897C-INTERRUPTED PILOT.
3
RM7897A-INTERRUPTED PILOT.
RM7897C-DELAYED MAIN VALVE.
INDICATES FEEDBACK SENSING
TO RELAY STATUS FEEDBACK
AND LINE VOLT INPUTS
FIELD WIRING
INTERNAL WIRING
OPTIONAL KEYBOARD
DISPLAY MODULE
DDL
RS485
1
DDL
2
COMMUNICATIONS 3
M22727A
Fig. 1. Internal block diagram of RM7897A,C (see Fig. 2 and 3 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.
5
CONFIGURATION
JUMPERS
RUN/TEST
SWITCH
RESET
PUSHBUTTON
SAFETY RELAY
CIRCUIT
STATUS LEDs
CONTROLLER
LIMITS
PREIGNITION
INTERLOCK
6K1
REMOTE
RESET
3K1
RM7897A1002, RM7897C1000 7800 SERIES RELAY MODULES
1. For proper subbase wiring and sequence chart, refer to
Fig. 2 and 3.
2. For remote wiring of the Keyboard Display Module, refer
to the Specifications for the Keyboard Display Module
(65-0288), Network Interface Unit (63-2278), Data
ControlBus™ Module (65-0091) or Extension Cable
Assembly (65-0131).
3. Disconnect the power supply from the main disconnect
before beginning installation to prevent electrical shock
and equipment damage. More than one disconnect can
be required.
4. All wiring must comply with all applicable electrical
codes, ordinances and regulations. Wiring, where
required, must comply with NEC, Class 1 (Line Voltage)
wiring.
5. For recommended wire size and type, see Table 1.
6. For recommended grounding practices, see Table 2.
120 VAC,
50/60 HZ
L1
L2
(HOT)
1
PLUG-IN PURGE
TIMER CARD
FLAME SIGNAL
TEST
MICROCOMPUTER
2K
3K
RELAY
DRIVE 4K
CIRCUIT
5K
6K
7K
1K
POWER SUPPLY
1K1 2K1 5K1
7
6
4K1
LOCKOUT
INTERLOCK
(INCLUDING
AIRFLOW SWITCH)
2K2
20
7K16
d. Follow directions in flame detector, Data
ControlBus™ Module, or Remote Reset Module
Instructions.
8. 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.
NOTE: A 13 Vdc power supply must be used any time more
than one KDM is used.
3
L2
TEST
JACK
F
PLUG-IN
G
FLAME
AMPLIFIER
22
RELAY
STATUS
FEEDBACK
AND LINE
VOLTAGE
INPUTS
CONTROL
POWER
10
IGNITION
8
PILOT
2
MAIN VALVE
9
21
3
4
BLOWER
3 ALARM
66-1151