Detcon IR-700 - Manual (Page 12)

Model IR-700
IR-700 Instruction Manual Rev. 3.1 Page 8 of 40
Mounting Hole
6-32 threaded
Ground Point
M
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ti
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g
B
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lt
W
a
ll
(o
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o
th
e
r
m
o
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ti
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rf
a
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)
Use Spacers to move
the J-Box and Sensor
Assembly away from the
wall at least 0.25-0.5" to
allow access to Sensor
2.125"
detcon inc.
LEL
MODEL
IR-700
EYS Seal Fitting
Drain
Conduit
"T"
3
4
" NPT Fitting
Mounting Holes
5.5"
5"
12.5"
Typ.
5.25"
3
4
" NPT Fitting
Explosion Proof Housing
Junction-Box
(Detcon's J-Box Shown)
4.9"
Typ.
7.2"
Typ.
2"
IR-700 Inteligent
Transmitter Module
(ITM)
Housing Bottom
Splash Guard
3
4
" NPT Fitting
Plug unused ports
ITM
Ш0.265"
Ш0.265"
8-32 Threaded
Ground Point
Recommended Electrical
Installation Method
Mounting Hole
S
p
a
c
e
r
Figure 9 Outline and Mounting Dimensions
2.5 Electrical Installation
The Sensor Assembly should be installed in accordance with local electrical codes. The sensor assemblies are
CSA/NRTL approved (US and Canada) for Class I, Division 1, Groups B, C, & D area classifications, and are
ATEX Approved for Class I, Zone 1, Group IIB+H
2
area classifications.
Proper electrical installation of the gas sensor is critical for conformance to Electrical Codes and to avoid
damage due to water leakage. Refer to Figure 10 and Figure 11 for proper electrical installation.
NOTE: If a conduit run exits the secondary port, repeat the installation technique shown in
Figure 10.
In Figure 10, the drain allows H
2
O condensation inside the conduit run to safely drain away from the sensor
assembly. The electrical seal fitting is required to meet the National Electrical Code per NEC Article 500-3d
(or Canadian Electrical Code Handbook Part 1 Section 18-154). Requirements for locations of electrical seals
are covered under NEC Article 501-5. Electrical seals also act as a secondary seal to prevent water from
entering the wiring terminal enclosure. However, they are not designed to provide an absolute water-tight
seal, especially when used in the vertical orientation.
NOTE: A conduit seal is typically required to be located within 18" of the J-Box and Sensor
Assembly. Crouse Hinds type EYS2, EYD2 or equivalent are suitable for this purpose.