Wiring - Honeywell 7800 Series Manual

RM7888A

WIRING

1. a. For the internal block diagram of the RM7888A,
see Fig. 7. For proper subbase wiring, refer to Figs. 8
and 9.
b. For proper subbase wiring, refer to Fig. 8 .
c. For proper remote wiring of the Keyboard Display
Module; refer to Fig. 9 or 10; or to the Specifica-
tions for the Keyboard Display Module (65-0090),
Communication Interface Base Unit (63-2278),
DATA CONTROLBUS MODULE™ (65-0091),
or Extension Cable Assembly (65-0131).
Fig. 7—RM7888A internal block diagram.
4
2
2
2
2
65-0175
L1 (HOT)
BURNER CONTROL
RESET
PUSHBUTTON
STATUS LEDs
SAFETY RELAY
CIRCUIT
KEYBOARD
DISPLAY MODULE
DDL
RS485
1
2
DDL
COMMUNICATIONS 3
SPECIAL FUNCTION 1
LIMITS COMPLETE
LOW FIRE
18
SWITCH
SPECIAL
17
FUNCTION 2
SPECIAL
19
FUNCTION 3
SPECIAL
20
FUNCTION 4
2. Disconnect the power supply from the main discon-
nect before beginning installation to prevent electrical shock
and equipment damage. More than one disconnect may be
involved.
3. All wiring must comply with all appropriate electri-
cal codes, ordinances and regulations. Wiring, where required,
must comply with NEC Class 1 wiring.
L2
1
120 Vac
CONFIGURATION
JUMPERS
FLAME SIGNAL
MICROCOMPUTER
TEST
2K
3K
4K
RELAY
DRIVE
5K
CIRCUIT
7K
1K
POWER SUPPLY
6K1
REMOTE
5K1
1K1
RESET
4K1
6
2K2
7
7K1
HIGH FIRE
12
8K1
COMMON
13
8K2
MODULATE
15
9K1
9K2
LOW FIRE
14
PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
1
120 VAC INPUT FROM SYSTEM MASTER CONTROLLER REFER TO
2
TABLE 1 AND FIGURE 8.
12
Wiring
L2
TEST
JACK
F
PLUG-IN
FLAME
G
AMPLIFIER
22
RELAY
STATUS
FEEDBACK
AND LINE
VOLTAGE
INPUTS
CONTROL
POWER
ALARM
3
AIRVALVE
5
IGNITION
10
8
PILOT
9 MAIN VALVE
FLAME
21
PROVEN
INDICATES FEEDBACK SENSING
TO RELAY STATUS FEEDBACK
AND LINE VOLT INPUTS
FIELD WIRING
INTERNAL WIRING
M9496