
Model TP-524D-HRT
TP-524D-HRT Instruction Manual Rev. 0.3 Page 7 of 48
8-32 tapped
ground point
4.6"
3
4
NPT Ports
6.125"
5.5"
6.45"
1
4
" mounting holes
5.25"
Wall (or other
mounting surface)
H2S Sensor
Splash Guard
2"
2.1"
PGM 1
PGM 2
MODEL TP-524DHOUSTON, TEXAS
FLT 1 2 CAL
MicroSafe H2S Gas Sensor
ALM ALM
TM
Figure 6 Typical 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.
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 7 and Figure 8 for proper electrical installation.
If a conduit run exits the secondary port, repeat the installation technique shown in
Figure 7.
In Figure 7, 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 watertight seal,
especially when used in the vertical orientation.
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.
The Detcon Warranty does not cover water damage resulting from water leaking into
the enclosure.
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