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MOUNTING RELAY MODULE
1. Mount the 7800 SERIES RElay Module vertically on the
Q7800 Subbase, or mount horizontally with the knife
blade terminals pointing down. When mounted on the
Q7800A, the 7800 SERIES Relay Module must be in an
electrical enclosure.
2. When mounting in an electrical enclosure, provide ade-
quate clearance for service, installation and removal of
the 7800 SERIES Relay Module, KDM, flame amplifier,
flame amplifier signal voltage probes, electrical signal
voltage probes, and electrical connections.
a. Allow an additional two inches below the 7800
SERIES Relay Module for the flame amplifier
mounting.
b. Allow an optional three-inch minimum on both sides
of the 7800 SERIES Relay Module for electrical sig-
nal voltage probes.
3. Make sure no subbase wiring is projecting beyond the
terminal blocks. Tuck wiring in against the back of the
subbase so it does not interfere with the knife blade ter-
minals or bifurcated contacts.
RESET
BUTTON
DUST
COVER
RUN/TEST
SWITCH
RELAY
MODULE
CONFIGURATION
JUMPERS
PURGE
TIMER
SEQUENCE
STATUS
LED PANEL
Fig. 3. 7800 SERIES Relay Module exploded view.
EC7820A 7800 SERIES RELAY MODULES
IMPORTANT
Install the 7800 SERIES Relay Module with a plug-in
motion rather than a hinge action.
4. Mount the 7800 SERIES Relay Module by aligning the
four L-shaped corner guides and knife blade terminals
with the bifurcated contacts on the wiring subbase and
tightening the two screws securely without deforming
the plastic.
5. Mount other required and optional system components
by referring to Fig. 3 and the instructions provided with
each component.
PRINCIPAL TECHNICAL FEATURES
The EC7820A Relay Module provides all customary flame
safeguard functions while providing significant advancements
in the areas of safety, annunciation, and system diagnostics
WIRING
SUBBASE
9
H O N E Y W E LL
CAPTIVE
MOUNTING
SCREW
FLAME
AMPLIFIER
M11631A
66-1091—08
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