Velocity SmokeWatch VDOT-U5015, Руководство пользователя

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www.velocitydetection.com Doc: GLT-311-7-1 Issue: 001 Date: 28/10/2020
VDOT-U5015 Explosion Proof Smoke Detector
The field wiring terminal connections are certified for a single wire in
size from 0.2 to 2.5 mm2 (or two conductors with same cross section
0.2 to 0.75 mm2). The screws must be tightened down with a torque
0.4 to 0.5 N•m. The metal housing must be electrically connected to
earth ground.
A minimum of 12 Vdc must be present at the U5015 to ensure
proper operation. The maximum cable length from power source to
U5015 is 2000 feet. When the U5015 Smoke Detector is mounted
remotely using an STB termination box, maximum cable length from
U5015 to STB is 500 feet.
WARNING
For field connections, use wires/cables that are rated at 20°C
greater than the maximum ambient temperature.
NOTE
In applications where the wiring is installed in conduit, dedicated
conduit is recommended. Avoid low frequency, high voltage, and
non
- signaling conductors to prevent nuisance EMI problems.
JUMPER
Depending on the wiring option that is used, jumpers may be
required. See Table 3 for the Jumper Usage Guide and Figures 12 to
15 for wiring examples.
WIRING PROCEDURE
Ensure that all cables are terminated properly. Conductor insulation
should be stripped off with a bare conductor length of 0.2 inch (5 mm)
minimum and 0.7 inch (18 mm) maximum. Ensure that cable shield is
properly terminated and that bare shield wire is not allowed to
accidentally contact the metal housing or any other wire.
Use the following instructions when wiring the U5015 detector:
1. Slightly loosen the three setscrews located on the retaining ring
(see Figure 7).
2. Unscrew the retaining ring to gain access to the wiring terminals
(see Figure 8), and complete the installation of the system conduit.
Feed the external wiring through the remaining junction box entry
or M25 to 3/4 inch adapter. When installing the junction box, use
care not to damagethe wires and refrain from twisting them.
3. Connect the external wiring to the appropriate terminals.
•
Figure 9 shows the wiring terminals.
•
Figure 10 shows the ground lug locations.
•
Figures 12 and 13 show wiring for single detector
configurations.
•
Figures 14 and 15 show wiring for multiple detector
configurations.
4. Re-install the assembly. Use the alignment guide (see Figure 11)
to align the retaining ring with the junction box.
5. Screw the retaining ring on to the junction box and re-tighten the
three setscrews.