RM7890A,B,C/EC7890A,B 7800 SERIES RELAY MODULES
9
66-1089—11
Mounting RM/EC7890 Relay Module
1.
Mount the RM/EC7890 vertically on the Q7800
Subbase, or mount horizontally with the knife blade
terminals pointing down. When mounted on the
Q7800A, the RM/EC7890 must be in an electrical
enclosure.
2.
When mounting in an electrical enclosure, provide
adequate clearance for servicing, installation and
removal of the RM/EC7890, KDM, flame amplifier, flame
amplifier signal voltage probes, electrical signal voltage
probes, and electrical connections.
a. Allow an additional two inches (51 mm) below the
RM/EC7890 for flame amplifier mounting.
b. Allow an optional three-inch (76 mm) minimum to
both sides of the RM/EC7890 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 RM/EC7890 with a plug-in motion rather
than a hinge action.
4.
Mount the RM/EC7890 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.
Mounting Other System Components
(Fig. 3)
Refer to the applicable specifications for mounting other
system components.
Fig. 3. RM/EC7890 Relay Module exploded view.
HONEYWELL
POWER
PILOT
MAIN
FLAME
ALARM
RESET
DUST
COVER
WIRING
SUBBASE
CAPTIVE
MOUNTING
SCREW
RELAY
MODULE
SEQUENCE
STATUS
LED PANEL
RESET
BUTTON
FLAME
AMPLIFIER
BURNER CONTROL
M11588A
CONFIGURATION
JUMPERS
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