Boiler house Level controls
2
System operation During normal operation the local/remote switches must be in 'remote'. The boiler alarm relays in each boiler panel are normally energised which in turn keep the alarm relays in the remote panel energised and no lights show. In the case of a boiler alarm, the relays are de-energised, the boiler alarm lamp in the remote panel lights and the buzzer sounds. The operator should then press the stop button and may mute the buzzer. The alarm lamp continues to show whilst there is an alarm. When the boiler attendant goes to the boiler house he should switch to 'local', rectify any faults on the boiler and set it running. The remote stop button must then be reset with a key, and the switch in the boiler house returned to 'remote'. If a boiler panel is switched off all power is removed from that section of the remote alarm panel so no boiler alarm is signalled. Similarly when a boiler is switched to 'local' the alarm lamp and buzzer in the remote panel will not operate. In the case of a break in the cable the boilers will be shut down immediately but could be restarted by switching to 'local' in the boiler house.
Testing Any alarm system should be tested regularly. In the case of high integrity self-monitoring low level alarms, the remote panel can be tested during the regular weekly test of the low level alarms.
2.3 100
TI-S75-06 AB Issue 3
Remote Alarm and Shutdown Panels for Boilers
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