User's Manual

P/N 81-CO2MAN-001 B-1 September 2013
APPENDIX B
OBSOLETE EQUIPMENT
B-1 INTRODUCTION
This appendix contains information concerning equipment and components that were
previously provided as part of the system or as an option for the system but are no longer
available for procurement.
B-2 OBSOLETE EQUIPMENT
The obsolete items contained in this appendix are:
•Mercury Check
• Pneumatic Transmitter
• Pneumatic Control Head, 1-inch, 40-second
• Pneumatic Main-to-Reserve Valve
•Lockout Valves
• Odorizer, 1.5" NPT Housing and Glass Cartridge
B-3 MERCURY CHECK
B-3.1 Description
The mercury check, Part No. 871346 (Figure B-1 and Figure B-2) is used for pneumatic
systems having more than five heat actuated detectors, or for applications where it is
necessary to isolate HADs subject to varying environmental and/or process conditions.
The mercury check can accept a detection signal from up to three separate detector branch
lines. It consists of three detection chambers manifolded together to a common outlet port,
and three interconnected wells filled with mercury. Each detection chamber is individually
vented by an appropriately-sized vent, and the level of the mercury can be adjusted to provide
the degree of sensitivity required for each tubing branch line and its associated HADs. The
mercury isolates the detection chambers from each other and its level above the manifold
outlet determines the pressure setting of the system in inches of water column.
Refer to Paragraph 2-3.6.4 for detailed vent information.