Display Module; Fig. 19-Flame Signal Amplifier Mounting - Honeywell 7800 Series Manual

RM7838B
INSTALLATION
Fig. 18—Remote mounting of Keyboard

Display Module.

INSTALLING PLUG-IN FLAME SIGNAL
AMPLIFIER (FIG. 19)
1. Disconnect power supply before beginning installa-
tion to prevent electrical shock and equipment damage. More
than one disconnect may be involved.
65-0120—1
Fig. 19—Flame signal amplifier mounting.
2. Align the amplifier circuit board edge connector with
the keyed receptacle on the RM7838B. Verify the amplifier
nameplate faces away from the Relay Module.
3. Push in the amplifier until the circuit board is fully in-
serted into the receptacle and then push the amplifier toward
the RM7838B retaining clasp.
4. Verify the amplifier is firmly in place.
5. Perform all required checkout tests.
INSTALLING THE FLAME DETECTOR (FIG. 20)
NOTE: Table 2 lists the flame detection systems available for
use with RM7838B. Make sure the correct combination
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 manu-
facturer's instructions.
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.
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