Assembly - Honeywell 7800 Series Manual

RM7800E,G,L,M

ASSEMBLY

MOUNTING RM7800
NOTE: For installation dimensions, see Figs. 1 or 2 .
RELAY MODULE MOUNTING
1. Mount the RM7800 vertically, see Figs. 15 or 16, or
mount horizontally with the knife blade terminals pointing
downward. When mounted on the Q7800A, the RM7800
must be in an electrical enclosure.
2. Select the location in the electrical enclosure. Be sure
to allow adequate clearance for servicing, installation and
removal of the RM7800, Keyboard Display Module, flame
amplifier, flame amplifier signal voltage probes, electrical
signal voltage probes, and electrical connections.
a. Allow an additional two inches below the RM7800
for the flame amplifier mounting.
d. Allow an optional three-inch minimum to both
sides of the RM7800 for electrical signal 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 terminals
or bifurcated contacts.
IMPORTANT: The RM7800 must be installed with a
plug-in motion rather than a hinge action.
4. Mount the RM7800 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.
INSTALLING ST7800 PURGE CARD
1. Remove the Keyboard Display Module, DATA CON-
TROLBUS MODULE™ or Extension Cable Assembly, see
Fig. 17.
2. Remove the current ST7800 from the RM7800 by
pulling upward the plastic support cover.
3. Make sure that the ST7800 selected has the de-
sired timing.
4. Insert the Purge Card into the opening of the RM7800
compartment, see Fig. 17.
5. Reinstall the Keyboard Display Module or DATA
CONTROLBUS MODULE™ onto the RM7800 and re-
store power to the device.
6. Run the burner system through at least one complete
cycle to verify the system is operating as desired.
IMPORTANT: The RM7800 will not function properly
without one of the following mounted correctly: Key-
board Display Module, DATA CONTROLBUS
MODULE™ or an Extension Cable Assembly.
MOUNTING KEYBOARD DISPLAY MODULE (VFD)
1. Align the two interlocking ears of the Keyboard Dis-
play Module with the two mating slots on the RM7800, see
Fig. 18.
2. Insert the two interlocking ears into the two mating
slots and with a hinge action push on the lower corners of the
Keyboard Display Module to secure it to the RM7800.
Fig. 15—Electrical panel installation.
Fig. 16—Wall or burner installation.
3. Verify the Keyboard Display Module is firmly
in place.
MOUNTING DATA CONTROLBUS MODULE™
AND EXTENSION CABLE ASSEMBLY
1. Align the two interlocking ears with the two mating
slots on the RM7800, See Figs. 19 and 20.
2. Insert the two interlocking ears into the two mating
slots and push on the lower corners of the DATA
CONTROLBUS MODULE™ to secure it to the RM7800.
3. Be sure the DATA CONTROLBUS MODULE™ or
Extension Cable Assembly is firmly in place.
20
Assembly