Appendix A Engineering Drawing - Emerson Rosemount Model 500 Retrofit Instructions

Retrofit Instructions
SK-07781
A Engineering drawing
Notes
1. Change out thermistors to 3-0500-521 for H
2. Add valve actuation inert gas inlet that is separate from the hydrogen carrier gas
3. Add carrier shut-off valve (2-4-4000-190) as shown.
4. If the carrier pressure regulator is a Masoneilan 60-110 psig regulator
5. Add ⅛-in. tee connections:
6. New reference vent.
Rosemount Model 500 Helium to Hydrogen Gas Conversion Kit
inlet.
WARNING
Do not use hydrogen for valve actuation.
(2-4-9500-084), replace it with the Parker 10-100 psig regulator (2-4-5001-977)
included in the kit.
a. Preheat coil
b. Reference detector
c. To analytical valve
Engineering drawing
September 2019
carrier.
2
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