Boiler house Level controls
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Local regulations may restrict the use of this product to below the conditions quoted. In the interests of development and improvement of the product, we reserve the right to change the specification without notice. © Copyright 2014
TI-S75-06 AB Issue 3
Remote Alarm and Shutdown Panels for Boilers
The requirements of PM5 The Health and Safety Executive Guidance Note PM5 'Automatically controlled steam and hot water boilers' specifies some requirements for remote alarms and the remote shutdown of boilers. Some of the relevant sections are: Paragraph 50 ......... when a boiler is not continually supervised it is not enough to have an alarm on the boiler. Alarms should be provided at points where they can be heard by persons who are competent to take appropriate action Paragraph 51 ........ When a boiler is subject to partial supervision it is recommended that an emergency device which will shut off the burners should be located remote from the boiler house and should be clearly marked. (See paragraph 13). Paragraph 13 ......... there should always be someone available on site who is competent to respond to alarms, and to take appropriate action which at a minimum, may be to shut the boiler down safely before calling for the assistance of a trained boiler attendant. Remote alarm panel These requirements can be met by the installation of a 'hard wired' remote alarm panel installed at a continuously manned location such as a telephone exchange or security point. Suitable procedures should then be established and training given on the action to take in the case of an alarm. A typical installation is shown below. Equipment required
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1. To be fitted in each boiler panel: 1 off Transformer 240 V (or 110 V) to 48 V.
Provides low voltage power supply to panel.
Boiler house
1 off Boiler shutdown relay 48 V coil. Shuts down burner when de-energised. 3 off Boiler alarm relays 240 V (or 110 V) coils. For signalling 1st low, 2nd low and high level alarms. Any number of additional alarms may easily be signalled. 1 off Key operated local/remote switch. Can be used to prevent remote alarms during manual tests and maintenance of the boiler.
Multi-core cable, 4 cores per boiler Typically 1000 m long using standard cable
Alarm and shutdown panel in remote location
2. To be fitted at the remote location: 1 off Alarm and shutdown panel for one or more boilers. Incorporates for each boiler an alarm lamp, alarm buzzer, mute button with relay and a mushroom headed stop button which latches in the stop position and can only be reset by a key. 4 terminals per boiler. Three boiler alarm and shutdown panel shown. Panel dimensions: For 1 or 2 boilers 300 x 300 x 140 mm deep For 3 or 4 boilers 500 x 400 x 140 mm deep 3. Cable 4 cores per boiler. PVC insulated, PVC sheathed, unscreened multi-core cable can be used. Cable lengths up to 1000 m are possible using cable size 0.5 mm² per core. Longer lengths would require large cable. A suitable cable can be obtained from ESD Electronic Services of Harlow in lengths up to 500 m, their type numbers are: 4 core 16-2-4 A 8 core 18-2-8 A 12 core 16-2-12 A 18 core 16-2-18 A
TI-S75-06 AB Issue 3
Remote Alarm and Shutdown Panels for Boilers
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