Det-Tronics C7050 A, C, G, P UV Flame Detector User Manual
Page 13
ward to prevent the cone of vision from scanning the
horizon, since the detectors can be affected by long
duration lightning flashes or distant arc welding.
When practical, mount the detectors so that the UV
test lamp is on top, since dirt accumulation between
the window and the reflector ring can interfere with
the Automatic
oi
function. See Figure 4 for mount-
ing dimensions.
2.
Disassemble the detector enclosure by turning the
housing cover counterclockwise. If the detector is
equipped with a cover locking device, loosen the
clamp and disengage the “catch” from the terminal
cap. See Figure 9 for an illustration of the detector
assembly and Figure 10 for the optional cover lock-
ing assembly. The tool required for the BASEEFA
clamp is a 5/32 inch hexagonal (Allen) wrench. For
the P.T.B. clamp, a triangular m4 (7 mm) wrench (Din
22417) must be used.
NOTE
Power must not be applied to the system while
opening the detector housings, or while plugging in
or removing the sensor tube modules.
3.
Install the A-, B-, C-, and D-leads to the connections
on the terminal block. See Figure 11. Do not
ground the shield to the detector housing.
NOTE
Many wiring codes prohibit the connection of a
shield to the negative terminal of a power source
(terminal 2 of the controller). If such a connection
is permitted, the detectors can be wired using a 3
wire shielded cable. The shield is connected to the
“C” terminal of the detector in place of a separate
C-lead. (See Figure 23).
4.
Remove the UV sensor tube module from its ship-
ping package. When handling the sensor tube
module, be careful not to touch the sensor tube,
since oil from the skin can attenuate UV radiation,
reducing the sensitivity of the tube.
11
95-8242
G0025
O-RINGS (2)
OPTIONAL MOUNTING BRACKET (Q9001B)
WINDOW AND HOUSING
oi
REFLECTIVE RING *
*
oi
UNITS ONLY
SOURCE TUBE
TERMINAL BLOCK
TERMINAL CAP
INDEX PIN
UV SENSOR MODULE
Figure 9—C7050 Detector
B0769
CATCH
BARREL
WINDOW CAP
TERMINAL CAP
BLIND HOLE
CATCH SCREW
STRAP
COVER
LOCKING
ASSEMBLY
Figure 10—Detector with Cover Locking Assembly
QUICK CONNECT PLUG (4)
SIGNAL (B)
oi
FUNCTION (D)
GROUND (C)
+
290 VDC (A)
C0125
INDEX PIN
Figure 11—Detector Terminal Block