Honeywell 7800 Series Manual page 22

M7800E,G,L,M
ASSEMBLY
Fig. 21—Remote mounting of Keyboard Display
Module.
Remote Mounting Bracket
Panel Bracket
INSTALLING PLUG-IN FLAME SIGNAL
AMPLIFIER
1. Disconnect power supply before beginning installa-
tion to prevent electrical shock and equipment damage. More
than one disconnect may be involved, see Fig. 22.
2. Align the amplifier circuit board edge connector with
the keyed receptacle on the RM7800. Verify the amplifier
nameplate faces away from the Relay Module.
3. Push in the amplifier until the circuit board is fully
inserted into the receptacle and then push the amplifier
toward the RM7800 retaining clasp.
4. Verify the amplifier is firmly in place.
5. Perform all required checkout tests.
INSTALLING THE FLAME DETECTOR
NOTE: Table 2 lists the flame detection systems available
for use with the RM7800. Make sure the correct combina-
tion of amplifier and flame detector(s) is used.
Proper flame detector installation is the basis of a safe and
reliable flame safeguard installation. Refer to the instructions
packed with the flame detector and the equipment manufac-
turer instructions, see Fig. 22.
Keep the flame signal leadwires as short as possible from
the flame detector to the wiring subbase. Capacitance in-
creases with leadwire length, reducing the signal strength.
The maximum permissible leadwire length depends on the
type of flame detector, leadwire and conduit. The ultimate
limiting factor in the flame detector leadwire is the flame
signal, see Table 8.
Fig. 22—Flame signal amplifier mounting.
22