Honeywell RM7838A User Manual

7800 SERIES RELAY MODULES
9 32-00213—01
Mounting Other System
Components (Fig. 3)
Refer to the applicable specifications for mounting other
system components.
Fig. 3. Wiring subbase and sequence chart for RM7838A Relay Module.
A
B
D
C
S445A
S445A
STOP
B
A
STOP
START
G
L2
3
5
6
7
8
9
10
F
(L1)
13
14
15
16
17
18
19
20
21
22
12
MASTER
SWITCH
MAIN FUEL
VALVE(S)
PILOT
120V, 50/60 Hz POWER SUPPLY. PROVIDE DISCONNECT
MEANS AND OVERLOAD PROTECTION AS REQUIRED.
EXTERNAL ISOLATION REQUIRED OF INPUT AND
OUTPUT TERMINALS TO CONNECT THE RM7838A IN A
PARALLEL APPLICATION.
FOR DIRECT SPARK IGNITION
(OIL OR GAS)
120V ALARM
LIMITS
FAN
L1
(HOT)
L2
1
3
L1
6
21
Q7800 SUBBASE
2
L2
4
RUNNING
INTERLOCKS
FLAME
DETECTOR
LOW FIRE
PURGE SWITCH
HIGH FIRE
PURGE
SWITCH
DPST ALARM
SILENCING
SWITCH
120V ALARM
4
56
2
R4155A
IGNITION
BURNER
CONTROL
MAIN FUEL
VALVES
ALTERNATE CONNECTION WHEN
USING THE R4155A ALARM
SILENCING RELAY. THE
REMAINING CONNECTIONS ARE
THE SAME FOR THE RM7838A.
Q7800
SUBBASE
3
3
3
5
4
5
4
1
2
START/IGN.
HIGH FIRE SW.
OPERATING
CONTROLS
AND
INTERLOCKS
INITIATE
ALARMALARM ALARM ALARM ALARM
STANDBY
POWER POWER
PILOT
FLAME
MAIN
HOLD
ALARM
RUN
ALARM
POWER
PILOT
FLAME
MAIN
STANDBY
BURNER
START
MAIN VALVE
RUNNING INTERLOCKS AND BURNER CONTROLLER CLOSED
STOP SWITCH
INTERMITTENT PILOT
SAFE START CHECK
LED
DISPLAY
VFD
DISPLAY
POWER
PILOT
FLAME
MAIN
PFEP
4 OR 10 SEC
POWER
PURGE
POWERPOWER
FLAME
SIGNAL
M11498B
00 00 00 10
L1
TO
TO
7
9
621
8
TO
FLAME PROVING
SSC
19
7
COMBUSTION BLOWER, RECIRCULATING, EXHAUST FANS
10
RM7838A
ISOLATION CONTACT REQUIRED FOR STANDING PILOT
APPLICATION. DRIVE 120 VAC RELAY FROM TERMINAL 8.
COMBUSTION BLOWER OR EXHAUST RECIRCULATING FANS.
SEE FLAME DETECTOR SPECIFICATION FOR CORRECT WIRING.
8

Honeywell RM7838A Specifications

General

Brand	Honeywell
Model	RM7838A
Category	Control Unit
Language	English