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INSTALL THE FLAME DETECTOR
The performance of the flame safeguard system depends
upon correct flame detector installation. Refer to the
instructions packed with the flame detector and also the
burner manufacturer's instructions for details. (See also
figure 4).
Keep the flame signal leadwires from the flame detector to
the wiring subbase as short as possible. Capacitance
increases 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 signal
leadwire length is the flame current.
MEASURING FLAME CURRENT STRENGTH
Flame current is measured/recorded in different ways
according to the model selected
1 It can be measured conventionally using a micro-
ammeter which is plugged into a jack socket on the
face of the R4348B.
2 It can be displayed/recorded locally or remotely when
the 4-20mA output model is taken.
3 Visually presented on the face of the unit by means of
color coded LED's.
The customer can choose a model which includes two
methods of flame current measurement. e.g. Flame current
jack socket for local testing by a service technician plus 4-
20mA output for remote indication.
EN1C-9999SZ22 R1104
PLUGGING THE R4348 INTO THE SUBBASE
1 Plug the selected amplifier into the back of the R4348
(see fig. 3).
Make sure the correct combination of amplifier and
flame detector is used.
2 Check that wiring connections are correct and that all
terminal screws are tight.
3 Plug the chassis into the subbase and tighten the two
captive screws.
4 In case of B1057 model, plug the cable into the back-
side of the amplifier.
FIG. 3 Installing a plug-in flame current amplifier
6
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