Det-Tronics UD10 DCU Emulator FlexVu Universal Display Unit - Manual (Page 35)

G-2 95-8656 4.2
instAllAtion notes
Important
Hydrocarbon-based grease emits hydrocarbon
vapors that will be measured by PointWatch,
resulting in inaccurate gas level readings.
use
only low vapor pressure Lubriplate grease or
teflon tape on the pointWatch detector and
associated termination box. Do not get grease
on the optics of the detector. A suitable grease is
listed in the “ordering Information” section in this
manual.
Important
In applications where both PointWatch and
catalytic type sensors are used, ensure that the
grease used to lubricate the PointWatch detector
threads does not come into contact with the
catalytic sensors, since poisoning of the catalytic
sensors could result. It is strongly recommended
that maintenance personnel wash their hands
between handling the two types of sensors.
orientAtion
It is highly recommended that the PIR9400 be
installed in the horizontal position.
The detector
is not position-sensitive in terms of its ability to detect
gas. However, the weather baffle assembly provides
superior performance when installed in a horizontal
position. (See illustration below).
SEE NOTE 1
NOTE 1 CONNECT THE GREEN SENSOR LEAD
TO THE CHASSIS GROUND LUG ON THE
INSIDE BOTTOM OF THE PIRTB.
NOTE 2 HOUSINGS MUST BE ELECTRICALLY
CONNECTED TO EARTH GROUND. A2557
PIRTB JUNCTION BOX
PIR9400
DETECTOR
YELLOW
WHITE
BLACK
RED
SPARE
CAL
4 – 20
RET
+24 +24
RET
4 – 20
CAL
GREEN
CHASSIS
Sensor Connector
Power Supply Connector
LON Connect
or
J4
J3
J7
24 VDC
–
24 VDC
+
SHIELD 24 VDC
–
24 VDC
+
SHIELD
SHIELD
C
ALIBR
A
TE
24 VDC
–
4-20 mA 24 VDC
+
J4-1 J4-2 J4-3 J4-4 J4-5
J7
-6
J7
-5
J7
-4
J7
-3
J7
-2
J7
-1
SHIELD
2 B COM
2 A COM
SHIELD
1 B COM
1 A COM
J3-1
J3-2
J3-3
J3-4
J3-5
J3-6
UD10
DISPLAY UNIT
SW3
J2
ON
UD10-DCU Wired to PIR9400 with PIRTB Termination Box