MEDC HD1 Range User Manual
Page 3
© MEDC 2005
02/05
3.0 OPERATION
The Heat Detector consists of a sealed element containing a single normally open
(N.O.) thermal switch which operates at a fixed temperature. The sensor element is
fully sealed and no attempt must be made to modify this in any way. Adjustment of
the temperature setting is not possible.
4.0 MAINTENANCE
During the working life of the Heat Detector it should require little or no maintenance.
However, if abnormal or unusual environmental conditions occur due to plant damage
or accident etc., then visual inspection is recommended.
If a fault should occur, then the unit can be repaired by MEDC.
UNDER NO CIRCUMSTANCES SHOULD ANY ATTEMPT BE MADE TO EITHER
UNSCREW THE HEAT DETECTOR ELEMENT FROM THE ENCLOSURE OR GAIN
ACCESS TO THE INSIDE OF THE HEAT DETECTOR ELEMENT.
EITHER OF THESE ACTIONS WILL RESULT IN THE ASSEMBLY BECOMING UNSAFE
FOR USE IN A POTENTIALLY EXPLOSIVE ATMOSPHERE.
If you have acquired a significant quantity of Heat Detectors, then it is recommended
that spare units are also made available, (please discuss your requirements with
MEDC’s Technical Sales Engineers).
5.0 CERTIFICATION/APPROVALS
Please refer to marking on the unit for specific approval details.
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Listed/certified for use in USA and Canada, Class I, Division 2, Groups A, B, C & D
6.0 CERTIFIED TEMPERATURE
–4°F to +131°F (–20°C to +55°C).