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View Temperature Trends.
Below are three examples of water-temperature trends over time at an actual installation where “The Brain®” is controlling the domestic hot water system. BASIS (Building Automation System Interface Solutions) interfaces with the resident BAS to provide system data trending and logging. You can view water temperature, flow and pressure at various intervals, including minutes, hours, and 24-hour periods. This allows you to monitor and control your hot-water system from remote portals within the BAS.
Example of Temperature Trending for 1-Week Period
Example of Temperature Trending for 24-Hour Period
Example of Temperature Trending for 2-Hour Period
Example of Temperature Trending for 1-Week Period
- Inlet hot water fluctuates between 122°F (50°C) and 133°F (56°C). Tends to cool during zero demand periods, due to low system temperature loss; thus, minimal hot water “top-up” requirement.
- Mixed water temperature does not change over 5-day period outside +/- 2°F (1°C), irrespective of changes to inlet supply temperature and system demand.
- Static cold water heats to ambient mechanical room temperature 84°F (29°C) during zero demand. Drops to 68°F (20°C) under system demand after 84°F (29°C) water is evacuated.
- Building heating season commences. Steam line in supply tunnel overheats parallel inlet cold water supply pipe work. Static cold water heats to 98°F (36.6°C) and drops to 68°F under system demand.
Example of Temperature Trending for 24-Hour Period
- Hot water peaks at 132°F (55°C).
- Cold water peaks at 98°F (36.6°C) during zero demand due to steam heat transfer.
- Cold water bottoms at 64°F (18°C) under system demand.
- Critical overnight-zero-demand period; “The Brain” maintains remarkable control.
- 6 a.m. first system demand. Hot water temperature increases 10°F (5.5°C), cold water temperature decreases 31°F (17.2°C), “The Brain” sees flow change, maintains complete control.
Example of Temperature Trending for 2-Hour Period
- Hot water peaks at 132°F (55.5°C).
- Cold water peaks at 98°F (36.5°C) during zero demand due to steam heat transfer.
- Cold water bottoms at 64°F (18°C) under system demand.
- 6 a.m. first system demand. Hot water temperature increases 10°F (5.5°C), cold water temperature decreases 31°F (17.2°C), “The Brain” sees flow change, maintains complete control.
