Honeywell 7800 SERIES User Manual

13 65-0120—1
RM7838B
INSTALLATION
CONFIGURATION
JUMPERS
MICROCOMPUTER
RESET
PUSHBUTTON
RUN/TEST
SWITCH
STATUS LEDs
PLUG-IN PURGE
TIMER CARD
SAFETY RELAY
CIRCUIT
POWER SUPPLY
KEYBOARD
DISPLAY MODULE
HIGH PURGE
COMMON
MODULATE
LOW FIRE
PLUG-IN
FLAME
AMPLIFIER
RELAY
DRIVE
CIRCUIT
CONTROL
POWER
TEST
JACK
REMOTE
RESET
DDL
DDL
COMMUNICATIONS
INDICATES FEEDBACK SENSING
TO RELAY STATUS FEEDBACK
AND LINE VOLT INPUTS
FIELD WIRING
INTERNAL WIRING
IGNITION
PILOT
MAIN VALVE
1K
RELAY
STATUS
FEEDBACK
AND LINE
VOLTAGE
INPUTS
LIMITS
PREIGNITION
INTERLOCK
1K1 2K1 5K1
8K1
8K2
9K1
9K2
120 Vac
FLAME SIGNAL
TEST
PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
RS485
1
2
3
L1
(HOT) L2
4
6
7
4K1
2K2
10
8
9
7K
5K
4K
3K
2K
F
G
22
1
6K1
5
ALARM
3K1
3
L2
12
13
15
14
M5195A
1
RECIRCULATING
BLOWER
STOP SWITCH
RECIRCULATING
A F S
COMBUSTION
AIR BLOWER
16
17
18
19
20
21
COMBUSTION
AIR BLOWER
SWITCH
1/2 OF DPST
ALARM SILENCING
SWITCH
1/2 OF DPST
ALARM SILENCING
SWITCH
PILOT VALVE
HOLD SWITCH
MANUAL VALVE
OPEN SWITCH
LOW START
SWITCH
HIGH PURGE
RATE SWITCH
START SWITCH
BURNER CONTROL
Fig. 7—Internal block diagram of the RM7838B (See Figs. 8 or 9 for detailed wiring instructions).

Honeywell 7800 SERIES Specifications

General

Model	7800 SERIES
Category	Control Unit
Frequency	50/60 Hz
Approvals	UL, CE
Communication	Communication Interface (Optional)