Detector Location Considerations; Applying Power; Figure 6 Relay Protection Circuit For Dc Loads; Figure 7 Detector / Controller Connections - General Monitors TA402A Instruction Manual

Installation
12
3.4 Detector Location
Considerations
There are no standard rules for detector
placement since the optimum location is
different for each application. The customer
must evaluate conditions at the detector site
in order to make this determination.
Gen erally:
n
The flame detector should be easily
accessible for optical checks.
that sufficient clearance exists to allow
the use of field devices such as the Air
Purge Guard.
n
The flame detector head should always
be pointing at a slight downward angle to
prevent build up of dust and particulate
matter on the window(s).
that flame detectors are optical devices.
n
The flame detector should be located in
areas where fires may be likely to occur,
if their presence is dangerous.
n
Multiple flame detectors should be
positioned such that their vertical and
horizontal fields of view overlap, to
ensure adequate coverage.

3.5 Applying Power

Zero Two Series Modules do not have an
ON/OFF power switch. Each module in the
Zero Two Series operates from 24 Vdc.
Power requirements will vary according to
the number and type of modules in the
system, as well as the number and type of
field devices.
NOTE: if the application of power does
not turn ON the unit, check fuse F1 on
the control board.
Figure 11 indicates where the power
connections for the chassis are made.
Ensure
Remember
General Monitors
Fig ure 11