One element stops drawing its expected load.
The element is called to heat, but the electrical measurements do not show the expected response.
- LOCATION
- London Victoria station
- SETTING
- Commercial coffee shop
- MONITORED ASSET
- One hot-water cylinder
- ELEMENT VIEW
- Two elements, separately monitored
The operational challenge
A working supply does not tell the whole story.
In a busy station coffee shop, hot water supports the working day. A sudden loss can demand an urgent response at the moment the site most needs continuity.
With two elements serving a single cylinder, one element may continue heating after the other develops a problem. Some hot water can remain available, while the reduced heating capacity becomes harder to manage as demand rises.
Looking only at whether hot water is currently available can miss that change. Individual element monitoring gives the team a more useful view of what is happening.
The monitoring view
See the readings.
Understand the history.
Temperature and electrical measurements provide context for maintenance decisions. These genuine Grafana snapshots show the monitoring views the team can review.
Water temperature history
Outlet temperature across the six-hour monitoring window.
- Outlet temperature · °C
Top element electrical history
Review measured current and power alongside the thermostat call signal.
- Current · A
- Power · W
- Thermostat call · on/off
Bottom element electrical history
Compare the electrical measurements, thermostat call and outlet temperature over time.
- Current · A
- Power · W / kW
- Thermostat call · on/off
- Voltage · V
- Outlet temperature · °C
How earlier awareness can help
A prompt for action.
Before a complete loss of heat.
For a cylinder like this, the value lies in understanding an individual element problem while there may still be time to respond.
EXAMPLE MAINTENANCE SCENARIO
The individual element is highlighted.
When current readings support the indication, GEMS can draw attention to that element rather than waiting for an obvious loss of hot water.
The team plans a targeted response.
With the other element potentially still heating, maintenance can assess the issue and plan work before the remaining capacity is lost.
Illustrative maintenance response to an individual-element heating fault.
What it means for the client
Better context for the next decision.
The London Victoria installation shows why monitoring individual elements matters. Temperature answers one question; demand and measured load help answer the next.
Together, those views support a proactive approach: investigate the element that needs attention, prepare the visit and plan around the site’s operation. The aim is to reduce avoidable disruption through earlier information and a clearer response.
Discuss this approach for your sitesCould your team benefit from a clearer view?
Talk to E2M about GEMS for your coffee shop, hospitality site or estate.