Operation; Maintenance; Certification/Approvals; Lecex Units - Eaton PH1 Technical Manual

Standard wiring – c/w addressable module

5.0 Operation

The unit is operated by lifting the spring loaded flap
on the front of the unit, then pulling down the handle
underneath. The pull handle will rotate downwards
General arrangement

6.0 Maintenance

During the working life of the unit, it should require little
or no maintenance. GRP will resist attack by most acids,
alkalis and chemicals and is as resistant to concentrated
acids and alkalis as most metal products.
However, if abnormal or unusual environmental conditions
occur due to plant damage or accident etc., then visual
inspection is recommended.
If the unit requires cleaning, then only clean the exterior
with a damp cloth to avoid electrostatic charge build up.
If a unit fault should occur, then the unit can be repaired
by MEDC. All parts of the unit are replaceable.
If you acquired a significant quantity of units, then it
is recommended that spares are also made available.
Please discuss your requirements with the Technical Sales
Engineers at MEDC.
through 90 degrees. The pull handle will remain latched in
the operated position until manually reset. The lift flap can
be lowered back to its original position until the unit needs
to be reset.
The reset the unit, first raise the lift flap away from the
pull handle. The key (provided with the unit) is inserted
into the two holes located underneath the pull handle
in the front face until resistance is felt. Depress the key
further to release the pull handle which can be returned
to its original position. Finally, lower the lift flap back to its
original position.
N otee: When resetting the unit, please ensure the key is
depressed centrally with even pressure on each leg
of the reset key.
The operating voltage of the unit is stated on the
certification label.

7.0 Certification/approvals

lECEx units

Certified to IEC 60079-0, IEC 60079-1 and IEC 60079-31
Ex d unit (IEC certification No. IECEx ITS 11.0021X)
Ex d IIC T6 (-55°C to +70°C) Gb
Ex tb IIIC T85°C (-55°C to +70°C) Db IP66
The IECEx certificate and product label carry the IECEx
equipment protection level markings
Gb and Db
Where Gb signifies suitability for use in a Zone 1 surface
AlArm pull stAtion - pH1 TM230 Issue F July 2019 www.eaton.com
Alarm pull station - PH1
industries area in the presence of gas.
Db signifies suitability for use in a Zone 1 surface
industries area in the presence of dust.
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