Det-Tronics UD10 DCU Emulator FlexVu Universal Display Unit - Manual (Page 55)

4.2 95-8656 K-3
instAllAtion
wIRINg REQUIREmENTS
The simplest installation involves installing the sensor
into one of the UD10-DCU openings and connecting
the wiring directly to the UD10-DCU. If the installation
requires separation of the C706x sensor and the
UD10-DCU Display, the sensor can be connected to
a STB sensor termination box, and the C706x/STB
combination wired to the UD10-DCU. In this case,
shielded cable is recommended to help protect against
interference caused be extraneous electrical “noise.” In
applications where the cable is installed in conduit, the
conduit should not be used for wiring to other electrical
equipment whenever possible. If other equipment
power wiring is run in the same conduit, the cabling
must be shielded. The maximum allowable distance
between the C706x sensor and UD10-DCU Display
Unit is limited by the resistance of the cabling used.
INSTaLLaTION aND wIRINg PROCEDURE
1. Determine the best mounting locations for the
detectors.
2. Install the C706x sensor within the proper opening
in the UD10-DCU or STB junction box. Mount the
UD10-DCU/C706x with the sensor oriented vertically
and the opening pointing down. The UD10-DCU
should be electrically connected to earth ground.
noTe
The electrochemical sensor cell does not need
to be installed within the C706X housing while
installing and wiring the detector/junction box.
It is recommended to keep the sensor in the
manufacturer’s sealed shipping bag in a cool
storage environment until actual power-up and
calibration commissioning is performed. This
will ensure that the sensor will provide maximum
longevity.
3. Terminate all three C706x conductors at the proper
terminals. Refer to the appropriate illustration for
details.
4. Double check that all wiring is the proper size
and type and has been installed correctly. Check
operating voltage at the C706x sensor and the
UD10-DCU Display Unit.
noTe
Do not apply power to the system with the junction
box cover removed unless the area has been de-
classified.
5. Proceed with startup and calibration.