Installing the Detector
TM40/40U Rev. (Af), February 2019
35
Table 13: Tools
Tool
Function
Comments
Hex k
ey 3/16”
Open and close detector
cover (for wiring)
Part of the kit
Hex k
ey 1/4”
Mount the detector on the tilt
mount
Part of the kit
Flat screwdriver
6mm
Connect ground terminal
Standard tool
Flat screwdriver
2.5mm
Connect wires to the terminal
blocks
Standard tool
For wiring, use color-coded conductors or suitable wire markings or labels. 12
–
20AWG / 0.5
–
3.5mm² wires may be used for site wiring. The selection of wire
gauge should be based on the number of detectors used on the same line and the
distance from the control unit, in compliance with specifications (see
Instructions for Electrical Wiring
on page 61).
3.4
Certification Instructions
Warning:
Do not open the detector, even when isolated, in the presence of any
open flame.
3.4.1
Special Instructions for Safe Use
The dimensions of the flame paths are other than the relevant minimum or
maximum, as required by Table 2 of EN 60079-1:2014, as detailed below:
Flame Path
Location
Type of
Joint
Maximum
Gap, ic
Minimum
Length, L
Sapphire window Flanged
0.04mm
10.5mm
Main spigot
Cylindrical 0.15mm
15.5mm
•
Gaps, ic, should not be modified to be any larger, and lengths, L, should not
be modified to be any shorter than the values shown in the table above.
•
Units may be painted or fitted with optional accessories, some of which are
made of a non-metallic material or have a non-metallic coating which could
potentially generate an ignition-capable level of electrostatic charge under
certain extreme conditions. Therefore, these units should not be installed in a
location where they may be subjected to external conditions (such as high-
pressure steam) which might cause a build-up of electrostatic charges on the
non-conducting surfaces. Cleaning of the equipment (except window) should
be done only with a damp cloth.