Honeywell RM7895A Installation Instructions Manual page 3

Wiring Subbase
WARNING
Electrical Shock Hazard.
Can cause serious injury, death or equipment
damage.
Disconnect the power supply before beginning
installation.
The internal block diagram of the RM7895A,B,C,D/
EC7895A,C;RM7896A,B,C,D is shown in Fig. 1.
1 PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
INDICATES FEEDBACK SENSING
TO RELAY STATUS FEEDBACK
AND LINE VOLT INPUTS
FIELD WIRING
INTERNAL WIRING
DDL
DDL
COMMUNICATIONS
M5110G
Fig. 1. Internal block diagram of RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D
RM7895A,B,C,D/EC7895A,C; RM7896A,B,C,D 7800 SERIES RELAY MODULES
5
RUN/TEST
SWITCH
RESET
PUSHBUTTON
STATUS LEDs
LIMITS
OPTIONAL KEYBOARD
DISPLAY MODULE
RS485
1
2
REMOTE
3
RESET
(see Fig. 2 and 3 for detailed wiring instructions).
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
(65-0090), 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.
L1
(HOT)
1
CONFIGURATION
JUMPERS
MICROCOMPUTER
2K
3K
RELAY
DRIVE 4K
CIRCUIT
5K
6K
7K
SAFETY RELAY
1K
CIRCUIT
POWER SUPPLY
6
CONTROLLER LOCKOUT
INTERLOCK
(INCLUDING
AIRFLOW SWITCH)
6K1
3K1
3
L2
RM7895, RM7896: 120 VAC, 50/60 HZ.
EC7895A,C: 220-240 VAC, 50/60 HZ.
PLUG-IN PURGE
TIMER CARD
TEST
FLAME SIGNAL
JACK
PLUG-IN
TEST
FLAME
AMPLIFIER
RELAY
STATUS
FEEDBACK
AND LINE
VOLTAGE
INPUTS
CONTROL
POWER
1K1 2K1 5K1
7 10
IGNITION
4K1
8 PILOT
2K2
MAIN VALVE
9
4
BLOWER
3
ALARM
L2
F
G
22
66-1090—4