Testing the Heat Detector

INJURY HAZARD

Always have a second technician or safety observer present during the test.
Clearly communicate and post signs during testing to make sure no one attempts to energize or operate the equipment inadvertently.
Technicians performing these tests must be familiar with AES Cabinet’s safety procedures and have appropriate PPE (Personal Protective Equipment), such as insulated gloves, safety glasses, hearing protection, and arc-flash rated clothing.

Failure to follow these instructions may result in injury.

INJURY HAZARD

Before testing, disconnect and isolate aerosol actuator cables from the WAGO connector to prevent accidental aerosol release. Make sure the wires are removed from the top of the WAGO closest to the aerosol actuator as the lower set of wires has 24V DC power. Reconnect in the same locations as they were removed.
After testing, use LYNK ACCESS to verify all alarms are cleared.

Failure to follow these instructions may result in injury.

Preparation

Notify all relevant personnel of the planned test.
Ensure the system is in a safe state and confirm the energy storage cabinet is offline.

Functional Test (without activating aerosol)

Use a controlled heat source, such as a heat gun or hairdryer, capable of safely reaching a temperature of 65°C (149°F).
Carefully direct the heat toward the heat detector sensor until the heat alarm is activated (typically within a few seconds).
Confirm the following:
- Heat alarm is triggered (audible and visual).
- The system triggers an internal protection state: Cuts DC output, triggers alarms, and indicators flash.
DO NOT continue heating after the alarm is activated.

Reset and Compile Results

After verifying the alarms, reset the fire alarm system per the manufacturer's instructions.
Allow the heat detector to cool before reconnecting the aerosol fire extinguisher. Confirm all detectors return to their normal state and no faults remain active on Lynk Access.
Record the date of the test and its results in the maintenance logs, making note of:
- Alarms triggered
- Detectors tested
- Corrective actions taken.