I need some clarification from the Forum group.

I recently was performing a Verification of a new Source of supply, a Carbon Dioxide Manifold that included Cryogenic Liquid Containers and cylinder reserve.

This manifold was supplied from a well known equipment supplier.

During our review of the source manifold, I quickly noticed that this manufacturer does not include Local signals for "Reserve In Use" and "Reserve Pressure Low". They do include a "Local" signal for "Changeover".

My concern is that a manifold in this category is required to include "Local Signals" that visibly indicates the operating status of the equipment. I reviewed this manufacturers installation information and their Operating and Maintenance Manual, and there is no mention of how they intend to display these required Local Signals.

I spoke with their technical support department, and they kept describing the Master Alarm Signals. When I questioned about the Local Signals required at the source equipment site, they questioned what code reference I was referring, and than repeated the description of the Master Alarm Signals. I expressed my concern about their supplying a source supply that did not include all of the applicable code requirements. They were either not understanding what a Local Signal was, as far as the code reference, or they were hoping that I would accept their Master Alarm Signal answer. (As an interesting end to that conversation, the technical support person, obviously exhausted with their in ability to explain how the two missing Local Signals were to be displayed at the source equipment, they finally said "well we've been selling these for twenty years so it must be code compliant" and than they hung up.)

In an effort to complete the verification for the facility, I labeled the header pressure gauge with a label that indicates the alarm point, and the reserve supply gauge with a label that indicates the pressure that the reserve supply will start to feed.

Isn't it the manufacturers responsibility to provide a source equipment manifold that meets all code requirements, or at least describes in their supplied material how the installer is to display the missing Local Signals?

Any input would be greatly appreciated.

Regards,

Bob Kroening (firebob1)

 I agree with Al and Bob I have seen your situation before,  you did the best thing. 

Check Out Sections #'s

for the code requirements

for a pressure relief valve

on each header of the manifold itself.

This relief is to be located on each the header

between the cryogenic vessel shutoff valve and the

manifold cabinet shutoff valve. 

SEE

5.1.3.5.9 part (9) & (10)

plus  

5.1.3.5.6 part (4) 

and

5.1.3.5.10.4 part (2)

Now the fun part / I have a secret !