Mounting Other System Components (Fig. 3) - Honeywell 7800 Series Installation Instructions Manual

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