Criterion 6.3.7 Fluid Safety Labeling

Criterion text:
Labels shall mark all drain and fill valves in the SWH system. Each label shall identify the fluid in that loop. The location of fluid handling instructions shall be referenced. The label shall list the heat exchanger type and heat transfer fluid as defined by the American Water Works Association, Cross Connection Control Manual. The label shall include a warning that fluid may be discharged at high temperature and/or pressure. The label shall contain the following warning:

“No other fluid shall be used that would change the original classification of this system. Unauthorized alterations to this system could result in a hazardous health condition.”

Comments:
Installers must attach labels/tags that have been provided by the manufacturer to all fill and drain valves. It is critical that these labels/tags be installed for future service purposes.

The installer must also ensure that the installation and operation manual is left at a conspicuous location at the site for future reference.

Figures 1 and 2 show labels attached to specific drain and fill ports on the system. (Note that a label should have been attached to the ball valve.)

Figure 1

Figure 2

The above installations are in contrast with that in Figure 3 in which no identification labels were attached.

Figure 3

Figures 3 and 4 provide a close up of these fluid safety labels.

Figure 3

Figure 4

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