Det-Tronics X9800 IR Flame Detector with Pulse Output - Manual (Page 9)

7 95-8555 5.1
pROTECTION agaINST MOISTURE DaMagE
It is important to take proper precautions during
installation to ensure that moisture will not come in
contact with the electrical connections or components
of the system. The integrity of the system regarding
moisture protection must be maintained for proper
operation and is the responsibility of the installer.
If conduit is used, we recommend installing drains,
according to local codes, at water collection points
to automatically drain accumulated moisture. It is
also recommended to install at least one breather,
according to local codes, at upper locations to provide
ventilation and allow water vapor to escape.
Conduit raceways should be inclined so that water
will flow to low points for drainage and will not collect
inside enclosures or on conduit seals. If this is not
possible, install conduit drains above the seals to
prevent the collection of water or install a drain loop
below the detector with a conduit drain at the lowest
point of the loop.
Conduit seals are not required for compliance with
explosion-proof installation requirements, but are
highly recommended to prevent water ingress in
outdoor applications. Units with M25 threads must use
an IP66/IP67 washer to prevent water ingress.
wIRINg pROCEDURE
wire Size and Type
The system should be wired according to local codes.
The wire size selected should be based on the number
of detectors connected, the supply voltage, and the
cable length. Typically 16 AWG or 2.5 mm 2 shielded
cable is recommended. Wires should be stripped
3/8 inch (9 mm). In some cases where the X9800 is
replacing existing pulse output detectors, the wiring
and power supplies may not be adequate. Consult the
factory for assistance.
Important
A minimum input voltage of 18 Vdc must be
present at the X9800.
The use of shielded cable is required to protect against
interference caused by EMI and RFI. When using
cables with shields, terminate the shields as shown in
Figures 6 through 10. Consult the factory if not using
shielded cable.
The “B” (pulse output) and “D” ( oi driver) leads from
each detector should be shielded from the “B” and “D”
leads of all other detectors in order to prevent false
alarms resulting from crosstalk between zones. It
is recommended that the “A” and “C” leads also be
shielded to provide maximum immunity to EMI/RFI.
(See Figures 6 to 10.)
In applications where the wiring cable is installed in
conduit, the conduit must not be used for wiring to other
electrical equipment.
If disconnection of power is required, separate disconnect
capability must be provided.
CaUtIon
Installation of the detector and wiring should be
performed only by qualified personnel.
Detector Mounting
Install the mounting arm assembly on a rigid surface.
The ideal installation surface should be free of vibration
and suitable to receive 3/8 inch (M9) bolts with a length
of at least 1 inch (25 mm). The surface must also have
sufficient capacity to hold the detector and mounting
arm weights (See “Specifications” section). Refer to the
Q9033 Mounting Arm manual (95-8686) for additional
mounting information. See Figure 3 for dimensions.
Detector wiring
Important
If installing an X9800 in place of an existing
detector, be sure to move the “A” lead (detector
power) at the controller from the +290 Vdc source
to the +24 Vdc source.
Do not apply 290 Vdc to
the X9800.
1. Make field connections following local ordinances
and guidelines in this manual.
Figure 4 shows the wiring terminal strip located
inside the detector’s integral junction box.
Figure 5 shows the wiring terminal identification for
the X9800 detector with pulse output.
Leave the shield open at the detector end and
permanently isolate it from accidental contact with
the case and/or other conductors. At the controller/
fire panel end, connect the shield and power minus
(–) to chassis (earth) ground either directly or
through a 0.47 µF 400 Volt non-polarized capacitor
(not supplied). (Refer to Figures 6 through 10.)