FlameVision Flame Detectors FV421i
Fixing instructions Doc. version 3.0 1/18
FV421i FlameVision Flame Detector – Fixing
Instructions
Introduction
This guide describes the installation procedure
of the intrinsically safe variant of the FV400
Series of Detectors - FV421i.
The installation procedure provides a step-by-
step process of how to mount, wire, configure
and commission the FV421i Intrinsically Safe
Detector.
Mounting a Detector
The location of the detector is determined at the
system design stage according to the principles
detailed in the FV421i Intrinsically Safe Detec-
tors Product Information and Design Application
guide and marked on the site plan.
Check that the position chosen provides:
A clear view of the area to be protected.
Easy access to install and maintain the detec-
tor and cables.
A strong, stable structure suitable to mount
the detector.
Tilt the face of the detector downwards to pre-
vent water collection and reduce the settlement
of particle deposits on the window.
On the FV421i Intrinsically Safe Detector, all
electrical connections are made via terminal
blocks inside the rear housing of the detector.
Two 20 mm cable entries are provided.
The detector must be securely mounted to a
strong stable structure either directly or using
the mounting bracket.
Mounting the detector directly
Fit the back-box of the detector onto the wall by
inserting the three M6 bolts, studs or screws
into the mounting holes.
Mounting the detector using the
bracket
A bracket (stainless steel) is available to mount
the detector that provides flexible adjustment to
easily position the detector to cover the pro-
tected area.
The surface chosen for the mounting should be
flat over the area of the mounting bracket to
ensure a stable fixing.
The FV421i Intrinsically Safe Detector can be
operated in any position but the mounting point
must be chosen to allow sufficient clearance for
adjustment of the angle and must also allow
space for the cable assembly.
Reference Document
Refer to the FV421i Intrinsically Safe
Detectors Product Information and
Design Application guide for information
on the Technical, Mechanical, Electrical
and Environmental specifications.
CAUTION
Do not open the detector when it is
powered or it is in environmentally
challenging conditions.
Fig. 1: Detector Orientation Relative to Horizon
Reference Document
For additional information, refer to the
latest issue of FV300 Mounting Bracket
Installation Leaflet ‘’120-415-594’’.
CENTRE OF DETECTOR
FIELD OF VIEW
PREFERRED METHOD
To Next Page
Need help?
General
