TinnerFlow logoTinnerFlow™
Mistake & recovery · #131

Misidentifying a chilled water coil valve as a heating valve and piping it wrong

3rd YearSystems & Controls

Read the piping and instrumentation diagram carefully before connecting any valve. Chilled water valves are typically labeled CWS/CWR and heating valves H…

Search Field RescueAsk ForemanOpen in mistake guide

Safer field move

Read the piping and instrumentation diagram carefully before connecting any valve. Chilled water valves are typically labeled CWS/CWR and heating valves HWS/HWR. A wrong connection results in a system that heats when it should cool.

Ask Foreman

Can you verify this before I keep going? I’m looking at: Misidentifying a chilled water coil valve as a heating valve and piping it wrong. What’s the approved correction for this job?

Do not

Do not hide, force, cover, or “make it work” if this affects safety, access, airflow, rated assemblies, supports, equipment, or inspection. Stop and verify the approved correction.

Related mistakes

Related apprentice questions