Honeywell RM7838B User Manual

RM7838B,C 7800 SERIES RELAY MODULE
66-1094—08 12
Fig. 5. Hookup of RM7838C1020.
Mounting RM7838B,C Relay Module
1. Mount the RM7838B,C vertically on the Q7800
Subbase, or mount horizontally with the knife blade
terminals pointing down. (For mounting on the Q7800A,
mount the RM7838B,C in an electrical enclosure.)
2. When mounting in an electrical enclosure, provide
adequate clearance for service, installation and removal
of the RM7838B,C, KDM, flame amplifier, flame
amplifier signal voltage probes, electrical signal voltage
probes, and electrical connections.
a. Allow an additional 2 in. (51 mm) below the
RM7838B,C for the flame amplifier mounting.
b. Allow an optional 3 in. (76 mm) minimum to both
sides of the RM7838B,C for electrical signal voltage
probes.
3. Make sure no subbase wiring is projecting beyond the
terminal blocks. Tuck in wiring against the back of the
subbase so it does not interfere with the knife blade
terminals or bifurcated contacts.
IMPORTANT
Install the RM7838B,C with a plug-in motion rather
than a hinge action.
4. Mount the RM7838B,C by aligning the four L-shaped
corner guides and knife blade terminals with the
bifurcated contacts on the wiring subbase and securely
tightening the two screws without deforming the plastic.
G
12
L2
13
314
415
5
16
6
17
718
819
920
10
21
F
22
ALARM
COMBUSTION BLOWER
RECIRCULATING
BLOWER AFS
COMBUSTION BLOWER AFS
INTERMITTENT/10 SECOND
INTERRUPTED PILOT/
IGNITION
5 SECOND IGNITION
MAIN FUEL VALVE(S)
F
–
+
–
+
HIGH FIRE
COMMON
MODULATE
LOW FIRE
LOW FIRE START SWITCH
HIGH PURGE RATE SWITCH
PREIGNITION INTERLOCK
FLAME DETECTOR
1
120 VAC, 50/60 HZ POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
SEE FLAME DETECTOR INSTRUCTIONS FOR CORRECT WIRING.
Q7800
2
START
2
STOP
L1
L2
1
RECIRCULATING
BLOWER
M29090
BURNER
CONTROL
maxon.su

Honeywell RM7838B Specifications

General

Brand	Honeywell
Model	RM7838B
Category	Computer Hardware
Language	English