Honeywell 7800 Series Manual page 16

RM7840E,G,L,M
ASSEMBLY
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 terminals
or bifurcated contacts.
IMPORTANT: The 7840 must be installed with a plug-in
motion rather than a hinge action.
4. Mount the RM7840 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.
Fig. 11—Electrical panel installation.
Fig. 12—Wall or burner installation.
INSTALLING ST7800 PURGE CARD
1. Remove the Dust Cover, Keyboard Display Module,
DATA CONTROLBUS MODULE™ or Extension Cable
Assembly.
2. Remove the current ST7800 from the RM7840 by
pulling upward on the plastic support cover.
3. Make sure the ST7800 selected has the desired timing.
4. Insert the Purge Card into the opening of the RM7840
compartment, see Fig. 13.
5. Reinstall the Dust Cover, Keyboard Display Module,
DATA CONTROLBUS MODULE™ or Extension Cable
Assembly onto the RM7840 and restore power to the device.
6. Run the burner system through at least one complete
cycle to verify the system is operating as desired.
MOUNTING DUST COVER
1. Align the two interlocking ears of the Dust Cover with
the two mating slots on the RM7840, see Fig. 14.
2. Insert the two interlocking ears into the two mating
slots and, with a hinge action, push on the upper corners of the
Dust Cover to secure it to the RM7840.
3. Be sure the Dust Cover is firmly in place.
Fig. 13—ST7800 Purge Card installation.
Fig. 14—Dust Cover mounting.
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