Sierra Monitor Corporation 4501-05 - Manual (Page 20)

Model 4501-XX Toxic Gas Sensor Module
Page 16 of 35
Figure 7 - 1: Module Components
7. SERVICE
7.1 SENSOR MODULE CONFIGURATION
The gas sensor module is comprised of the following sub-assemblies (Figure 7-1):
4501-XX Gas Sensor Module
SPL27077 Stainless Steel Enclosure (SPL 27085 for Aluminum Enclosure)
SPM27071 Transmitter Assembly
XXXXXXX Sensor Assembly (see Appendix B)
XXXXXXX Sensor (see Appendix B)
There are no field serviceable components below the sub assembly level.
NOTE
Area must be determined to be non-hazardous before opening enclosure.
7.2 ENCLOSURE REPLACEMENT
The enclosure should be replaced if the cover threads or conduit threads have been damaged, or if the
enclosure has been damaged sufficiently that it no longer meets the required NEMA classification.
To replace the enclosure follow the transmitter and sensor assembly removal instructions, remove the
damaged enclosure from its conduit, install a new enclosure and continue the transmitter and sensor assembly
replacement instructions.