MEDC HD1 Range User Manual

Page 4

4.0 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 operating temperature is stated on the identification label on

the outside of the unit. 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.

GENERAL ARRANGEMENT (Exd VERSION)

GENERAL ARRANGEMENT (Exe / Exi VERSIONS)

5.0 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

POTENTIALLY EXPLOSIVE ATMOSPHERES

If you have acquired a significant quantity of heat detectors, then it is recommended that spares are also

made available. Please discuss your requirements with MEDC’s technical sales engineers.

01/15