Det-Tronics X2200 UV Flame Detector with Pulse Output - Manual (Page 9)

7 95-8552 5.3
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 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 thread must use an IP66
washer or an O-ring sealed adapter/gland 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 14 AWG (2.08 mm 2 ) or 16 AWG
(1.31 mm 2 ) shielded cable is recommended. Wires
should be stripped 3/8 inch (9 mm). In some cases
where the X2200 is replacing existing pulse output
detectors, the wiring and power supplies may not be
adequate. Consult the factory for assistance.
NOTE
A minimum input voltage of 18 Vdc must be
present at the X2200.
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 swivel mounting bracket assembly on the wall.
The installation surface should be free of vibration and
suitable to receive 1/4 inch (M6) screws with a length of
at least 1 inch (25 mm), and have sufficient capacity to
hold the detector and bracket weight. Refer to Figure 3
for dimensions.
Detector wiring
Important
If installing an X2200 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 X2200.
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 X2200 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.)